No.
: SE-20021-2
Issued on : Aug. 31 2023

Instruction Manual
Pearl Rotary Joint
NC Series
This instruction manual applies to products with type designations
that begin with NC. (This manual does not apply to products with typedesignations that begin with NCW or NCFW.)This instruction manual describes important precautions for preventing
accidents and how to handle the product. To ensure safe use, be sure toread this manual and fully understand its contents before using this product.
Store this manual carefully so that it can be referred to at any time.

Pearl is a trade name of Showa Giken Industrial Co., Ltd.

1

Table of Contents
1. How to Read Nameplate (Nameplate Information) …………………………………………… P3
2. For Safety ……………………………………………………………………………………… P32‐1）Symbols …………………………………………………………………………………… P3
P32‐2）For safe use ………………………………………………………………………………… P3P3
3. Product Overview ……………………………………………………………………………… P4P43‐1）Application ………………………………………………………………………………… P4P43‐2）Information indicated by model names …………………………………………………… P4P43‐3）Service conditions ………………………………………………………………………… P5P53‐4）Precautions for use ……………………………………………………………………………
P5 P5
3‐5）Product structures and materials ………………………………………………………… P6
P63‐6）Product dimensions ………………………………………………………………………… P6
P73‐7）Product masses …………………………………………………………………………… P6P73‐8）Accessories ………………………………………………………………………………… P6
P8
4. Transport and Storage ………………………………………………………………………… P7P94‐1）Transport …………………………………………………………………………………… P7P94‐2）Storage ………………………………………………………………………………………P7P9
5. Installation to Machinery ……………………………………………………………………… P8P95‐1）Internal pipe (for duplex only) ………………………………………………………………P8P95‐2）Siphon pipe, Siphon elbow (for duplex, stationary IP only) ……………………………… P9P105‐3）Installing to a roll …………………………………………………………………………… P11P105‐4）Pipe laying ……………………………………………………………………………………P13P115‐5）Measures for preventing rotation ………………………………………………………… P14
6. Removal from Machinery ……………………………………………………………………… P12
P14
7. Operation ……………………………………………………………………………………… P15
P137‐1）Operation …………………………………………………………………………………… P15
P137‐2）Operation shutdown …………………………………………………………………………P15P13
8. Inspection and Maintenance …………………………………………………………………… P14P168‐1）Daily inspection …………………………………………………………………………… P14P168‐2）Greasing …………………………………………………………………………………… P14P168‐3）Repair and replacement of consumables ………………………………………………… P16
P15
9. Troubleshooting ………………………………………………………………………………… P17
P16
10. Disposal …………………………………………………………………………………………P18
P17
11. Product Warranty ……………………………………………………………………………… P19
P17
A. Appendix - How to Repair or Replace Consumables ………………………………………… P19
P21A‐1）For simplex, thread connection (NCL) ………………………………………………………
P22
P1
A‐2）For simplex, flange connection (NCLF) …………………………………………………… P24
P20A‐3）For duplex, stationary IP, thread connection (NC) ……………………………………… P26
P22A‐4）For duplex, stationary IP, flange connection (NCF) …………………………………………
P28
P24

2

1. How to Read Nameplate (Nameplate Information)
Ｍｏｄｅｌ Ｎａｍｅ

Ｍａｎｕｆａｃｔｕｒｉｎｇ Ｎｏ．

Ｍａｎｕｆａｃｔｕｒｉｎｇ Ｄａｔｅ

The nameplate attached to the product indicates the model name, manufacturing
number, and manufacturing date.

2. For Safety2‐1) Symbols
The symbols used in this instruction manual are described below.

WARNING

Indicates that failure to follow the warning message may cause bodily
accidents that may result in serious or even fatal injury.

CAUTION

Indicates that failure to follow the caution message may cause
personal injury or damage to peripheral equipment.

Instruction

Indicates that failure to follow the instruction message may cause
reduced product lifetime, product damage, or early leakage.
Indicates “prohibited actions”.

2‐2) For safe use
1. Transport, storage, installation, piping, operation, or maintenance of this product should be
carried out by an experienced expert.
2. Be sure to observe all warnings, cautions, and instructions described in each section.
3.
Never disassemble or modify this product because doing so is dangerous. We shall assume
no responsibility for any malfunctions, accidents, or the results thereof involving areassembled product after disassembly or a modified product. Also, a reassembled product after
disassembly or a modified product shall not be covered by the product warranty even if thewarranty period is still valid. This also applies to repairs done by yourself.
4. Confirm specifications (dimensions, materials, masses) indicated on individual product drawings
before staring work. Contact our sales representative for requests for product drawings.
5. Always use the latest instruction manual. You can download the latest version from our website.

33. Product Overview
3‐1) Application
A rotary joint is used for supplying fluid to or draining it from a machine rotating part called aroll, drum or cylinder, via fixed pipes.

3‐2) Information indicated by model names
Information indicated by NC series model names is described below.
The product list is shown in our catalog or on our website.

Note 1) “␣” indicates a space. A model name is indicated without spaces.
2) If two or more option (part change) codes are selected, they are indicated in alphabeticalorder.
3) The selection of two or more options resulting in a long model name is indicated as type
“ONC****” to denote a customized product for administrative reasons.
(The asterisks (****) indicate a four-digit number allocated to each model.)If you have any questions, contact our sales representative.

43‐3) Service conditions
Service Conditions of NC Series
Series

Fluid

Size

NC

Saturated Steam /Thermal Oil

15A～40A
50A～80A

Pressure
(MPa)
1.47

Max.
Rotation speed Temperature(℃)(min-1)
300
180
100

Note ) The pressure upper limit is 1.0 MPa when using saturated steam.

3‐4） Precautions for use
Use this product by following the warnings and instructions described below.

WARNING

1. If flammable fluids leak and ignite, bodily accidents including serious oreven fatal injury, or accidents that damage peripheral equipment may
occur due to explosion or fire. Depending on the type of fluid, thisproduct may subject to restrictions due to national laws or local
regulations.
2.
This product cannot be used for food-processing machinery.
Doing so may lead to adverse health effects.

Instruction

1. Perform operation within the service conditions.
2.
Do not operate under conditions where both pressure and rotation speed
are close to the max. values. Doing so significantly reduces productlifetime.
3.
This product cannot be used in temperature conditions where theproduct ambient temperature exceeds the upper limit of the service
conditions.
4.
The product cannot be used for liquid containing solid particles (slurry)or pulverulent body. The product cannot be used for fluid that causes
corrosion on it.
5.
This product cannot be used for operation with no rotation,intermittent rotation, or low-rotation speed (a few rotations per minute).
Otherwise, fluid leakage may occur.

53‐5) Product structures and materials
Materials of Main Components

NC

Part Name
Rotor
Casing
Head
Seal Ring

Material
Carbon SteelCast Iron
Cast Iron
CarbonHeat-resistant paint is applied toexternal parts.

Note ) Component materials are indicated on product drawings.
Contact our sales representative for requests for product drawings.

3‐6) Product dimensions
Product dimensions are shown on product drawings, in our catalog, or on our website.

3‐7) Product masses(kg)

Masses of NC Series
Type
NCL
NCLF
NC
NCF

15A
1.7
2.1
2.0
2.4

20A
1.7
2.1
2.0
2.4

25A
2.9
3.3
3.4
3.8

32A
3.7
4.3
4.0
4.6

40A
6.5
7.1
6.8
7.5

50A
10.3
11.1
10.8
11.6

65A
13.0
14.2
14.0
15.2

80A
20.5
22.5
22.0
24.0

3‐8) Accessories
1. A product installed with a flange is supplied with a gasket (copper jacket) and four sets of a studbolt (SS400), a hex. nut (SS400), and a spring washer (SWRH) for up to 65A or six sets thereof for
80A.
Ｌ
(mm)
Accessories（Flange Connection）
Ｋ
Type

Size

NCLF
NCF

15A
20A
25A
32A
40A
50A
65A
80A

GasketStud Bolt
SpringOuter Inner ThickHex. Nut (mm)K
L a b
WasherDia. Dia.
ness
24
16
3.2
M10 45 15 20 M10 type1 M10 No.2
25.5
18
2
33.5
24
3
41.5
32
3
M10 48 15 20 M10 type1 M10 No.2
47.5
38
3
59
49
3
74.5
62
3
M12 58 18 27 M12 type1 M12 No.2
89
74
3.2

ｂ

ａ

Ｇａｓｋｅｔ

2. A duplex, stationary IP, flange connection product (NCF) is supplied with a lock nut (right-handthread) used for securing the internal pipe to the product. The material of the lock nut is SS400.

64. Transport and Storage4‐1) Transport
Transport this product by following the cautions and instructions described below.

CAUTIONTo transport a product that weighs over 25 kg, use appropriate lifting
equipment to prevent injuries.

Note ) Even if the product weight is less than 25 kg, it increases to 25 kg or more when an internal pipe ora journal flange is installed to the product.

Instruction

1. Do not subject the product to undue impact while it is being transported.
Falling down or impact causes product damage (seal ring, etc.) or earlyleakage. If the product fell down or was damaged, contact us for maintenance.
2. When transporting a product with an internal pipe, do not secure the productso that the load is directly applied to the internal pipe. Doing so may bend theinternal pipe, hindering installation to a roll. Moreover, abnormal noise or earlyleakage may result after installation.

4‐2) Storage
An improper storage method causes product damage or early leakage.
Store this product by following the instructions described below.

Instruction

1. Wrap the product before storing it to prevent the entry of foreign objects.
2. Store this product in a dry environment at 10℃ to 40℃.
3. The storage period should be within two years. If the storage period exceeds
two years, contact us for maintenance.
4. If the product is stored after use, clean and then store it under the above
conditions.

75. Installation to Machinery
Product adjustment is not required before installation.
5‐1) Internal pipe (for duplex only)
Install an internal pipe to the product according to the following instructions.

Instruction

1. When inserting an internal pipe into the product rotor, be careful so that thepipe does not hit inner parts. Failure to do so could cause inner part damage,resulting in fluid leakage.
2. When installing an internal pipe to the product, be careful not to bend the pipe.
If it is bent, product installation to a roll may be hindered. Also, vibration orabnormal noise after installation, or early leakage may result.

● Duplex, stationary IP, thread connection （NC）
Screw the internal pipe taper thread into the head. For standard specification products, the thread
directions of the rotor and internal pipe are the same. Depending on the customer’s request, thethread directions of the rotor and internal pipe may be different from each other. Check the thread
directions on the product drawings, etc. before installation.
● Duplex, stationary IP, flange connection （NCF）
Screw G thread (right-hand thread) of the internal pipe into the head, and then secure it with asupplied lock nut.

85‐2) Siphon pipe, Siphon elbow (for duplex, stationary IP only)* If the siphon pipe or siphon elbow is not included in the package or has already been installed
before shipment, this step is not required.

1) Siphon pipe

Instruction

Check if the length and thread direction of the siphon pipe is appropriate inadvance with drawings, etc.
1. When the siphon pipe is used in contact with the roll, contact noise may begenerated and the roll may be damaged, such as contact scratches.
2. If the siphon pipe is short, it may not be as effective as expected in collecting
drain in the roll.
3. If the thread direction is inappropriate, the siphon pipe may fall out of theinternal pipe and into the roll due to loosening of the screw.

Internal Pipe

Siphon Pipe

Roll
● Siphon pipe installation （NC, NCF）
Attach the siphon pipe to the taper thread section of the internal pipe. The thread direction of
the internal pipe is "left-hand thread when the direction of rotation of the roll is clockwise"and "right-hand thread when it is counterclockwise" as viewed from the side from which the
product is installed.

92) Siphon Elbow

CAUTION

Check in advance with a drawing or the like whether the length of thehanging pipe to be attached to the siphon elbow is appropriate.
1. If the hanging pipe is inappropriately long, the hanging pipe may contact
the roll, resulting in abnormal noise, product damage, injury to workers,
or damage to surrounding equipment.
2. If the hanging pipe is inappropriately short, it may not be as effective as
expected in collecting drain in the roll.
Siphon Elbow
Casing Section
Lock Nut

Hinge Part
Ball Section

Internal Pipe

Hanging Pipe

Downward facing

Roll● Siphon elbow installation （NC, NCF）
The hanging pipe should be installed so that it faces downward.
1. Attach the hanging pipe to the taper thread section of the siphon elbow while holding theball section of the siphon elbow.
2. Screw the lock nut onto the G thread section of the internal pipe. Next, screw the siphon
elbow onto the internal pipe and fix it with the lock nut. Holding the ball section of thesiphon elbow or hanging pipe when tightening the lock nut could damage the hinge part.
Be sure to hold the casing section when tightening the lock nut.

105‐3) Installing to a roll
Install the product by following the cautions and instructions described below.

CAUTION

In order to prevent injuries, take the product weight into consideration
before installing the product. Use equipment such as a crane as necessary.
This work should be performed by two or more persons.

Instruction

1. Remove any foreign objects in such flow passages as a pipe or a roll before
product installation. If the fluid contains foreign objects, install a strainer at
the flow passages. Foreign objects cause early leakage.
2. If the product is installed with its center misaligned or tilted, vibration orabnormal noise may result. Moreover, the product or machine equipment may
be damaged due to vibration.
3. When tightening screws or nuts, properly torque-tighten them according to thescrew type or size.
4. To prevent uneven tightening, evenly tighten flange screws in a cross pattern.
5. Perform retightening after the start of use.
6.
To prevent internal pipe damage, do not hook a webbing sling to aninternal pipe. Hook a webbing sling to a casing.
A rotation stopper hole can be used for suspension.

●Installation: taper thread
1. Wrap seal tape around the taper thread of the rotor.
2. Screw the product into a roll.
●Installation: flange
The flange is detachable. Install it to the rotor together with the split ring in advance.
1. Install the supplied stud bolts to a roll.
2. Install the supplied gasket to a roll socket.
3. Insert the rotor spigot into the roll socket while checking that the stud bolts go through the rotor
flange holes.
4. Set the supplied spring washers on the stud bolts, and then secure the product with the supplied
nuts.

11

●Installation: internal pipe with siphon elbow (NC, NCF)
1. Confirm that the hanging pipe drops downward approximately 60 degrees under its own
weight from the hinge part of the siphon elbow.
Siphon Elbow

Hinge Part

Internal Pipe
Hanging Pipe

Lowering under its own weight

2. Rotate the product so that the hanging pipe and internal pipe are aligned and insert it into
the roll.
Lowering under
its own weight

Rotation

Insert3. Rotate the product during insertion to confirm that the hanging pipe has lowered under its
own weight, and then insert the product to the end.
Correct installation
Rotation

Lowering under
its own weight

CAUTION

If step 3 is not performed properly, the hanging pipe may contact the rolldepending on the depth and inner diameter of the roll, resulting in damage
to the product, injury to workers, or damage to the surrounding equipment.
Wrong installation

Contacting the roll125‐4) Pipe laying
Perform pipe laying work by following the warnings and instructions described below.

WARNING

Use a flexible metal tube suitable for characteristics of the fluid used andoperating conditions (pressure, temperature). If an unsuitable flexible metal
tube is used, it may be damaged, causing injury to workers or damage toperipheral equipment.

Observe the following instructions to prevent the generation of force applied tothe sides of the product, possibly causing product damage or early leakage.
1. Use a flexible metal tube for connection to the product.

Instruction

2.

Steel pipes should not be used for pipe laying.

3.

Avoid such pipe laying where heavy items such as valves are suspended
from the product.

4. When installing a flexible metal tube, slightly bend it in the rotation direction ofroll. (See the bottom left figure.)
5. Carry out pipe laying work so that excessive “tension”, “compression”,“torsion”, or “bending” is not applied to a flexible metal tube. In particular,“torsion” may significantly reduce the lifetime of the flexible metal tube.
(See the bottom right figure.)
6. Use the following table as a guideline for the flexible metal tube length.

Rotation Direction of Roll

Flexible
Metal Tube
Slightly bend the tube
in the rotation direction.

TensionCompression

OK

TorsionBending

Unacceptable(mm)

Flexible Metal Tube Length (Guideline)
Size

15A/20A

25A

32A/40A

50A

Length300～400

400～500

600～800

900～1000

65A

80A

1200～1300 1500～1600

135‐5) Measures for preventing rotation
A measure for preventing casing rotation is required. In order to prevent product damage or earlyleakage, take a measure according to the following instructions.

Instruction

1. Use an anti-rotation plate or a round bar in considering the change in casing
position after a certain period of operation time has elapsed.
2.
Do not secure the rotation stopper to an anti-rotation plate or a roundbar.
3. Use an anti-rotation plate or a round bar whose contact part with the rotation
stopper is smooth. Moreover, provide space on the opposite side of thecontact part.
Example of a measure using a plate
Ｃｌｅａｒａｎｃｅ

Ｐｌａｔｅ
Ｒｏｔａｔｉｏｎ Ｓｔｏｐｐｅｒ

Ｒｏｔａｔｉｏｎ Ｄｉｒｅｃｔｉｏｎ ｏｆ Ｒｏｌｌ

Casing moving direction
Note ) The seal face of the seal ring becomes worn over the course of operation time, andthe casing moves in the arrow direction.

6. Removal from Machinery
Remove the product by following the warnings, cautions, and instructions described
below in reverse order of the installation.

WARNING

In order to prevent bodily accidents due to residual fluid in the product orpipes, remove the product after fluid has been completely drained from theproduct or pipes and temperature has dropped to room temperature.

CAUTIION

In order to prevent injuries, take the product weight into consideration
before removing the product. Use equipment such as a crane as necessary.
This work should be performed by two or more persons.

Instruction

To prevent internal pipe damage, do not hook a webbing sling to an internal
pipe. Hook a webbing sling to a casing. A rotation stopper hole can be used
for suspension.

14

7. Operation
7‐1) Operation
Perform operation by following the warnings, cautions, and instructions described below.

WARNING

Immediately stop operation if fluid leakage is detected during operation.
If operation is continued with fluid leakage not being repaired, serious
accidents including bodily accidents may result.

During rotation or high-temperature/pressure fluid flow, keep wellaway from the product to prevent injuries or burns. Do not directly
touch rotating or hot parts during operation.

CAUTION

Instruction

1. When starting operation, check for abnormal rotation (center runout, abnormal
noise, etc.) or fluid leakage from the product while gradually increasing fluidpressure and roll rotational velocity.
2. If operation is continued under a center runout condition, product damage or
fluid leakage may result.
3. The occurrence of surging or water hammer can cause product damage or fluid
leakage. Avoid such occurrence.
4.
Do not perform dry operation (operation without fluid flow) for a long time.
The product lifetime becomes shortened.

7‐2) Operation shutdown
Follow the following instructions during operation shutdown.

Instruction

1. If the product is left as is for a long time during operation shutdown, rust may
occur, causing fluid leakage after operation restart. Clean flow passages for the
product, pipes, and roll before restarting operation.
2.
Do not put your hand on or ride on the product during equipment
maintenance. Doing so may cause product damage or fluid leakage after
operation restart.

15

8. Inspection and Maintenance8‐1) Daily inspection
Perform inspection according to the following instructions.

Instruction

1. Visually check pipe connections, product connections, and the product for fluid
leakage. If leakage is detected, repair the product or replace it with a new one.
2. When replacing, use the same type of product with the same size.

8‐2) Greasing
As a carbon bearing is used, greasing is not required.

8‐3) Repair and replacement of consumables
The carbon bearing and the seal faces of the seal ring become worn over the course of operation
time, and such malfunctions as fluid leakage may occur. However, the product can be reused byrepairing or replacing worn or deteriorated parts.
Contact us for repair or parts replacement. We carry it out according to our repair program.
Depending on the products, expenses for purchasing new products may be lower than repair expenses.
Consult with us when requesting repair or replacement.
< When carrying out repair or replacement of consumables by yourself >・ Repair or replacement should be carried out by an experienced expert.
・ Perform work according to “A. Appendix - How to Repair or Replace Consumables".
・ Use our genuine parts as replacement parts.
Contact our sales representative to request genuine parts.

・ Properly dispose of waste resulting from work according to national laws or local government
regulations or ordinances.
(Attention)
If you carry out repair or replacement, we shall assume no responsibility for any productmalfunctions, equipment malfunctions or accidents resulting from such product or the results
thereof. Also, the product shall not be covered by the product warranty even if the warranty
period is still valid.

16

9. TroubleshootingThis section describes the possible causes of and countermeasures against malfunctions.
If a problem persists, contact our sales representative for assistance.
Malfunctions

Fluid is leaking from theproduct.

CausesCountermeasures

A load is applied to the product due to an improper
method of pipe laying.

Review the pipe laying method.

The seal ring is damaged.
The seal ring lifetime has been reached.
The rotor seal face (sphere) is damaged.
The casing seal face (plane) is damaged.

Contact us for repair.

The fluid contains foreign objects.

Clean the inside of the product, pipes, androll. Install a strainer.

A load is applied to the product due to impropercountermeasures for preventing rotation.

Review the countermeasure forpreventing rotation.

Improper prevention of rotation hinders casing
movement caused by seal ring wear.

Review the countermeasure forpreventing rotation.

Operation is performed without rotation, or operationoccasionally ceases during the operation cycle.

Consult with us.

Operation is performed at low-rotation speed (a few
rotations per minute).

Consult with us.

Improper product selection.

Consult with us.

The rotation axes of a roll and the product are
misaligned with each other.

-<Flange connection type><Flange connection type>The shaft end socket of a roll is offset from the rollrotation axis.

Repair the spigot /socket.

<Thread connection type><Thread connection type>The shaft end screw hole of a roll is offset from the rollRepair the screw hole.
rotation axis.
The product has center
runout. (It is vibrating.)

Noise occurs.

The rotation axes of a roll and the product are inclined
from each other.

-<Flange connection type><Flange connection type>The shaft end socket of a roll is offset from the rollrotation axis.

Repair the installation face on the roll side
to which the product is installed.

Uneven tightening of fixing screws.

Evenly tighten the fixing screws.

<Thread connection type><Thread connection type>

The center lines of screw holes for fixing the productare inclined from the roll rotation axis.

Repair the screw hole.

The product is screwed in diagonally.
The internal pipe bends and comes in contact with theinner perimeter of the product rotor or that of the roll
shaft.
The internal pipe bent by its weight comes in contact
with the inner perimeter of the product rotor or that of
the roll shaft.
A load is applied to the product due to an improper
method of pipe laying.

Reinstall the product.
Straighten the bent internal pipe.

Consult with us.
Review the pipe laying method.

1710. Disposal
When disposing of packaging materials or products, properly dispose of them according tonational laws or local government regulations or ordinances.

18

11. Product Warranty
If a malfunction occurs during the warranty period, contact us or the distributor and send the
product to us. Be sure to carefully pack the product for protection before sending it.
After receiving the product, we will confirm the malfunction. If the malfunction was clearly causedby the materials of product components or the manufacturing method, we will repair the productin question or replace it with a new one free of charge.

Product Warranty Provision
1. Warranty period<New products>
One (1) year and six (6) months after shipment (from the manufacturing date) or one (1) year
after installation, whichever comes first.
<Repaired products>
Six (6) months after shipment (from the manufacturing date).
2. We charge a fee for repairs in any of the following cases.
①Failure after the warranty period has expired②Failure caused by use of the product deviating from the service conditions③Failure caused by misuse(improper storage, installation, pipe laying, operation or maintenance, etc.)④Failure caused by fluid contaminants or foreign objects in the fluid⑤Failure caused by relocation, transport, or falling of the product after delivery⑥Failure caused by disassembly, repair, or modification done by personnel other than our service
personnel⑦Failure of the product attributed to using materials or according to standards specified by thecustomer⑧Failure of the product attributed to using materials provided by the customer⑨Failure caused due to unavoidable acts of nature such as fires or other natural disasters
3. Scope of responsibility
Our responsibility shall be limited to repairs, replacements, or transport expenses covered by thisproduct warranty provision. Expenses or damages caused by said failures above shall not becovered.
4. Applicable regions
This product warranty provision shall be applicable to products installed in Japan.
Contact our sales representative if you install and use our products outside Japan.
5. Another agreement
If another product warranty agreement is made separately with us and clearly states that said
agreement shall have priority over this product warranty provision, this provision shall not beapplicable.
6. This product warranty provision shall not restrict the customer's legal rights.

19

URL https://www.sgk-p.co.jp
Export Department

Phone : +81-3-3598-1400 Fax. : +81-3-3598-2700
E-mail : sgk-tk@sgk-p.co.jp
Headquarters
7-24, Nishi-Kobari, Ina-Machi, Saitama, 362-0811 Japan
Phone : +81-48-728-9460 Fax. : +81-48-728-9461
Tokyo Sales Office
2-64-11, Akabane, Kita-ku, Tokyo, 115-0045 Japan
Phone : +81-3-3598-1400 Fax. : +81-3-3598-2700
Osaka Sales Office
2-9-7, Toyosaki, Kita-ku, Osaka, 531-0072 Japan
Phone : +81-6-6371-8341 Fax. +81-6-6371-6283
Nagoya Sales Office 41-1, Higashi-Ozone-cho, Higashi-ku, Nagoya, 461-0022 Japan
Phone : +81-52-938-8825 Fax. : +81-52-938-6423

20

A. Appendix - How to Repair or Replace Consumables

21A‐1) For simplex, thread connection （NCL）
３

７

８

６

４

２

５

１

１０ ９
①Rotor ②Casing ③Head ④Carbon Bearing ⑤Seal Ring
⑥Washer ⑦Spring ⑧Gasket ⑨Hex. Bolt ⑩Spring Washer< Disassembly >Carefully disassemble the product so that each part is not damaged. In particular, be careful not todamage the seal faces of rotor ①, casing ②, and seal ring ③.

1) Disconnect all pipes, etc. connected to the product.
2) Clamp casing ② with a vice, etc. so that rotor ① faces downward.
3) Remove hex. bolts ⑨ together with spring washer ⑩, and then remove head ③ from casing ②.
As the reaction force of spring ⑦ acts on the head, alternately unscrew hex. bolts ⑨ in a crosspattern.
4) Remove gasket ⑧, spring ⑦, and washer ⑥ from casing ②.
5) Pull out rotor ① together with carbon bearing ④ from casing ②.
6) Remove seal ring ⑤ from casing ②.

SHOWA GIKEN INDUSTRIAL CO., LTD

https://www.sgk-p.co.jp

7-24, Nishi-Kobari, Ina-Machi, Saitama, 362-0811 Japan 22
Phone : +81-48-728-9460
Fax. : +81-48-728-9461

< Inspection >Clean each part and check for damage. In particular, check the degree of wear and damage on theseal faces of rotor ①, casing ②, and seal ring ③.

< Repair and parts replacement >1) Rotor ①, casing ②, and seal ring ③ may be reused by repairing their seal faces in case ofminor damage.
2) Replace gasket ⑧ with a new one regardless of its condition.
3) If repair or reuse of parts is impossible, replace them with our new genuine parts.
Contact our sales representative to request genuine parts.

< Assembly >Assemble the product in the reverse order of disassembly.
Carefully disassemble the product so that each part is not damaged. In particular, be careful not todamage the seal faces. If dust adheres to the seal face, wipe it off with thinner.
1) Clamp casing ② with a vice, etc. so that the rotor side faces downward.
2) Apply a thin coat of machine oil to the seal faces (sphere and plane) of seal ring ⑤, and theninstall it to casing ②. Then install rotor ①.
3) Install carbon bearing ④, washer ⑥, spring ⑦, and gasket ⑧ to casing ②.
4) Install head ③ to casing ②, and evenly tighten hex. bolts ⑨ together with spring washers ⑩ ina cross pattern while compressing spring ⑦ to secure head ③.
5) Remove the product from the vice, etc. and place the product horizontally.
6) Check that rotor ① smoothly rotates.

Phone : +81-3-3598-1400 (Export Department) Phone : +81-3-3598-1400 (Tokyo Office)Phone : +81-6-6371-8341 (Osaka Office)Phone : +81-52-938-8825 (Nagoya Office)23A‐2) For simplex, flange connection （NCLF）
３

７

８

６

４

２

５

１ １１ １２

１０ ９①Rotor ②Casing ③Head ④Carbon Bearing ⑤Seal Ring
⑥Washer ⑦Spring ⑧Gasket ⑨Hex. Bolt ⑩Spring Washer⑪Rotor Flange ⑫Split Ring

< Disassembly >Carefully disassemble the product so that each part is not damaged. In particular, be careful not todamage the seal faces of rotor ①, casing ②, and seal ring ③.

1) Disconnect all pipes, etc. connected to the product.
2) Move rotor flange ⑪ to the casing ② side and remove split ring ⑫.
Then pull out rotor flange ⑪ from rotor ①.
3) Clamp casing ② with a vice, etc. so that rotor ① faces downward.
4) Remove hex. bolts ⑨ together with spring washer ⑩, and then remove head ③ from casing ②.
As the reaction force of spring ⑦ acts on the head, alternately unscrew hex. bolts ⑨ in a crosspattern.
5) Remove gasket ⑧, spring ⑦, and washer ⑥ from casing ②.
6) Pull out rotor ① together with carbon bearing ④ from casing ②.
7) Remove seal ring ⑤ from casing ②.

SHOWA GIKEN INDUSTRIAL CO., LTD

https://www.sgk-p.co.jp

7-24, Nishi-Kobari, Ina-Machi, Saitama, 362-0811 Japan 24
Phone : +81-48-728-9460
Fax. : +81-48-728-9461

< Inspection >Clean each part and check for damage. In particular, check the degree of wear and damage on theseal faces of rotor ①, casing ②, and seal ring ③.

< Repair and parts replacement >1) Rotor ①, casing ②, and seal ring ③ may be reused by repairing their seal faces in case ofminor damage.
2) Replace gasket ⑧ with a new one regardless of its condition.
3) If repair or reuse of parts is impossible, replace them with our new genuine parts.
Contact our sales representative to request genuine parts.

< Assembly >Assemble the product in the reverse order of disassembly.
Carefully disassemble the product so that each part is not damaged. In particular, be careful not todamage the seal faces. If dust adheres to the seal face, wipe it off with thinner.
1) Clamp casing ② with a vice, etc. so that the rotor side faces downward.
2) Apply a thin coat of machine oil to the seal faces (sphere and plane) of seal ring ⑤, and theninstall it to casing ②. Then install rotor ①.
3) Install carbon bearing ④, washer ⑥, spring ⑦, and gasket ⑧ to casing ②.
4) Install head ③ to casing ②, and evenly tighten hex. bolts ⑨ together with spring washers ⑩ ina cross pattern while compressing spring ⑦ to secure head ③.
5) Remove the product from the vice, etc. and place the product horizontally.
6) Check that rotor ① smoothly rotates.
7) Insert rotor flange ⑪ into rotor ① and install split ring ⑫.
Then move rotor flange ⑪ to the split ring ⑫ side.

Phone : +81-3-3598-1400 (Export Department) Phone : +81-3-3598-1400 (Tokyo Office)Phone : +81-6-6371-8341 (Osaka Office)Phone : +81-52-938-8825 (Nagoya Office)25A‐3) For duplex, stationary IP, thread connection （NC）
１１

３

７

８

６

４

２

５

１

Ｉｎｔｅｒｎａｌ Ｐｉｐｅ

１０ ９
①Rotor ②Casing ③Head ④Carbon Bearing ⑤Seal Ring
⑥Washer ⑦Spring ⑧Gasket ⑨Hex. Bolt ⑩Spring Washer⑪Elbow< Disassembly >Carefully disassemble the product so that each part is not damaged. In particular, be careful not todamage the seal faces of rotor ①, casing ②, and seal ring ③.

1) Disconnect all pipes, etc. connected to the product.
2) Remove elbow ⑪ from head ③.
3) Remove the internal pipe.
4) Clamp casing ② with a vice, etc. so that rotor ① faces downward.
5) Remove hex. bolts ⑨ together with spring washer ⑩, and then remove head ③ from casing ②.
As the reaction force of spring ⑦ acts on the head, alternately unscrew hex. bolts ⑨ in a crosspattern.
6) Remove gasket ⑧, spring ⑦, and washer ⑥ from casing ②.
7) Pull out rotor ① together with carbon bearing ④ from casing ②.
8) Remove seal ring ⑤ from casing ②.

SHOWA GIKEN INDUSTRIAL CO., LTD

https://www.sgk-p.co.jp

7-24, Nishi-Kobari, Ina-Machi, Saitama, 362-0811 Japan 26
Phone : +81-48-728-9460
Fax. : +81-48-728-9461

< Inspection >Clean each part and check for damage. In particular, check the degree of wear and damage on theseal faces of rotor ①, casing ②, and seal ring ③.

< Repair and parts replacement >1) Rotor ①, casing ②, and seal ring ③ may be reused by repairing their seal faces in case ofminor damage.
2) Replace gasket ⑧ with a new one regardless of its condition.
3) If repair or reuse of parts is impossible, replace them with our new genuine parts.
Contact our sales representative to request genuine parts.

< Assembly >Assemble the product in the reverse order of disassembly.
Carefully disassemble the product so that each part is not damaged. In particular, be careful not todamage the seal faces. If dust adheres to the seal face, wipe it off with thinner.
1) Clamp casing ② with a vice, etc. so that the rotor side faces downward.
2) Apply a thin coat of machine oil to the seal faces (sphere and plane) of seal ring ⑤, and theninstall it to casing ②. Then install rotor ①.
3) Install carbon bearing ④, washer ⑥, spring ⑦, and gasket ⑧ to casing ②.
4) Install head ③ to casing ②, and evenly tighten hex. bolts ⑨ together with spring washers ⑩ ina cross pattern while compressing spring ⑦ to secure head ③.
5) Remove the product from the vice, etc. and place the product horizontally.
6) Check that rotor ① smoothly rotates.
7) Install the internal pipe.
8) Wrap seal tape around the taper thread of head ③, and then install elbow ⑪.

Phone : +81-3-3598-1400 (Export Department) Phone : +81-3-3598-1400 (Tokyo Office)Phone : +81-6-6371-8341 (Osaka Office)Phone : +81-52-938-8825 (Nagoya Office)27A‐4) For duplex, stationary IP, flange connection （NCF）
１２ １１

３

７

８

６

４

２

５

１ １３ １４

Ｉｎｔｅｒｎａｌ Ｐｉｐｅ

１０ ９
①Rotor ②Casing ③Head ④Carbon Bearing ⑤Seal Ring
⑥Washer ⑦Spring ⑧Gasket ⑨Hex. Bolt ⑩Spring Washer⑪Lock Nut ⑫Elbow ⑬Rotor Flange ⑭Split Ring

< Disassembly >Carefully disassemble the product so that each part is not damaged. In particular, be careful not todamage the seal faces of rotor ①, casing ②, and seal ring ③.
1) Disconnect all pipes, etc. connected to the product.
2) Move rotor flange ⑬ to the casing ② side and remove split ring ⑭.
Then pull out rotor flange ⑬ from rotor ①.
3) Remove elbow ⑫ from head ③.
4) Remove lock nut ⑪ and the internal pipe.
5) Clamp casing ② with a vice, etc. so that rotor ① faces downward.
6) Remove hex. bolts ⑨ together with spring washer ⑩, and then remove head ③ from casing ②.
As the reaction force of spring ⑦ acts on the head, alternately unscrew hex. bolts ⑨ in a crosspattern.
7) Remove gasket ⑧, spring ⑦, and washer ⑥ from casing ②.
8) Pull out rotor ① together with carbon bearing ④ from casing ②.
9) Remove seal ring ⑤ from casing ②.

SHOWA GIKEN INDUSTRIAL CO., LTD

https://www.sgk-p.co.jp

7-24, Nishi-Kobari, Ina-Machi, Saitama, 362-0811 Japan 28
Phone : +81-48-728-9460
Fax. : +81-48-728-9461

< Inspection >Clean each part and check for damage. In particular, check the degree of wear and damage on theseal faces of rotor ①, casing ②, and seal ring ③.

< Repair and parts replacement >1) Rotor ①, casing ②, and seal ring ③ may be reused by repairing their seal faces in case ofminor damage.
2) Replace gasket ⑧ with a new one regardless of its condition.
3) If repair or reuse of parts is impossible, replace them with our new genuine parts.
Contact our sales representative to request genuine parts.

< Assembly >Assemble the product in the reverse order of disassembly.
Carefully disassemble the product so that each part is not damaged. In particular, be careful not todamage the seal faces. If dust adheres to the seal face, wipe it off with thinner.
1) Clamp casing ② with a vice, etc. so that the rotor side faces downward.
2) Apply a thin coat of machine oil to the seal faces (sphere and plane) of seal ring ⑤, and theninstall it to casing ②. Then install rotor ①.
3) Install carbon bearing ④, washer ⑥, spring ⑦, and gasket ⑧ to casing ②.
4) Install head ③ to casing ②, and evenly tighten hex. bolts ⑨ together with spring washers ⑩ ina cross pattern while compressing spring ⑦ to secure head ③.
5) Remove the product from the vice, etc. and place the product horizontally.
6) Check that rotor ① smoothly rotates.
7) Insert rotor flange ⑬ into rotor ① and install split ring ⑭.
Then move rotor flange ⑬ to the split ring ⑭ side.
8) Screw the internal pipe into the product and secure it with lock nut ⑪.
9) Wrap seal tape around the taper thread of head ③, and then install elbow ⑪.

Phone : +81-3-3598-1400 (Export Department) Phone : +81-3-3598-1400 (Tokyo Office)Phone : +81-6-6371-8341 (Osaka Office)Phone : +81-52-938-8825 (Nagoya Office)29