"Award for excellence"technology/product award
for small-and-medium
enterprises in 2008

Japan Machinery
Federation
Chairman's prize in 2009

Linear seal method
is patented in:

Excellent energy-saving
machineJapan, United States, Europe,Taiwan, Korea, and China

Excellentenergy-saving machine

LINEAR SEAL TYPE CHEMICAL SLURRY PUMP

seriesLinear seal type (contactless seal)

Slurry Pump

5

Features of linear-seal type chemical slurry pumpSlurry pump does not have a mechanical seal or ground packing as a shaft seal (contactless).
During operation, the unique impeller mechanism enables to seal the inside of the pump by theliquid balance and the linear seal creates a tight seal inside the pump under suspension.
1. The pump has no sliding parts during operation, so it is durable for abrasion due toslurry, deadhead and dry running.
2. External cooling water is not required because of no sliding parts.
3. There are no consumables such as a mechanical seal or ground packing.
4. The linear seal is protected by an adjacent sensor and PLC (supplied as standard).

Suction inlet

Discharge outlet

Suction inlet

Discharge outlet* Solenoid-valve is available as an option.

Under suspension

During operation

The back ﬂow liquid from the discharge outlet and the push-inpressure of the suction inlet elevate the liquid which isbalanced by the back blade. However, the pressure is reducedby the cut seal at ﬁrst.
Additionally, the magnet in a rotation disk attracts the magnet
in a movable seal.
The rotation disk adheres to the movable seal and it seals airon the surface of the liquid. Therefore, the liquid does not riseto the seal.

The magnetic poles in the rotation disk are converted at thesame time as the rotation. So, it repels the magnet in themovable seal, and the adhered seal parts open.
By the action of the back blade of the rotating impeller, theliquid balance seal is formed and the upper area of the backblade contains only air. Therefore, the parts do not contact
and slide each other.

Flooded suction
The total head of the linear-seal pump at the ﬂooded suction is2m as standard.
Note that a higher total head at the ﬂooded suction may beavailable depending on the conditions. If you need, contact thedistributor or us.

2Floodedsuction(2m or less)LRN series Linear seal type chemical slurry pump

PLC

Rotation disk

Movable seal

Outer diaphragm

ImpellerCut seal

Linear seal mechanism
Double safety mechanisms
If the movable seal is damaged or the slurry iscaught on the seal, the double safety measures
are taken to minimize the liquid leak by theouter diaphragm on the outside of the seal.

Linear seal principle
During the pump stop, the magnet in the rotation
disk ﬁxed with the shaft attracts the magnet in
the movable seal and adheres as a seal function.
The cut seal installed beneath the linear seal
prevents the back ﬂow. The seal surface does notcontact with the liquid and stops the inside air.
The magnets in the rotation disk and movableseal repel and separate each other at the start ofthe pump. It causes no sliding condition.
DetectionSensor

Adjacent sensor
The linear seal opens when the pump starts and enters the contactlessstate at the normal operation. For the function, the pump is equippedwith the adjacent sensor as safety device as standard and monitors
open/close of the movable seal. It will output the pump stop signal if
the movable seal does not open (contactless state).
<The sensor starts detection in 2 seconds after the operation starts andoutputs the signal if the movable seal does not open(contactless state).>*1 Install the automatic stop circuit with using theoutput signal.
*2 The adjacent sensor and PLC are connected.
Adjacent sensor

3For Eco-Friendly
Available applications:- When the magnet pump or mechanical seal is damaged by theliquid such as acid, alkali, solvent, easy crystallized liquid or theslurry contained liquid!
- When the pump is damaged frequently by deadhead operation!
- When using an ineﬃcient pump such as a rubber lining pump!
- When required external coolant for the seal area (mechanicalseal, etc.)!
(Pouring water or piping is not required.)

No sliding
parts preventthe pump
damageSuitable for circulation transfer of "CMP slurry liquid"

Why not start using?
"Power-saving"of the pumpPowerconsumption

Power
consumption

Power saving

The power consumption is reduced to one-tenth or lower compared with the plant air which is the higher production costbecause the pump is electric power drive.

Suitable for circulation transfer of "Cerium oxide liquid"

Why not start using?
Pump with"no consumables" ?
Running cost

No consumables

Running cost

The pump is not equipped with consumables such as a mechanical seal or ground packing required the periodical replacement.
Therefore, the running costs is reduced.

4

LRN series Linear seal type chemical slurry pump

■ ModelYD - 4 0 0 5 L R N - P P - L D 52
MotoroutputDischarge bore
25 : 25A
40 : 40A

Model

01 : 0.75kW
02 : 1.5kW
03 : 2.2kW05 : 3.7kW
07 : 5.5kW

Mainmaterial

Sealmaterial

O-ringmaterial

Frequency

PP : PPPE : PP/UPE

L: Linear seal

D : FPME : EPDM

5 : 50Hz
6 : 60Hz■ Performance curve

Speciﬁc gravity 1.2

mSpeciﬁcgravity
2 : 1.2

At ambient temperatures

50Hz

Total head

30204007
4005
1040024003

2501

0100200300

Capacity
Speciﬁc gravity 1.2m

400

L/min

At ambient temperatures

60Hz

Total head

30

2040074005

1025024003

2501
0100200300

Capacity

400L/min5

■ Speciﬁcation and dimension
50Hz LR [Specific gravity 1.2]
Model

Total head Capacity Bore（mm） Motor output（m） （L/min.） Suction Discharge （kW）

ABCDEF

2501LRN-PP-5

1060

40250.75

φ 90

φ105

168

115.5

156

156

4002LRN-PP-5

13100

50

40

1.5

φ105

φ120

156

92.5

174

174

4003LRN-PP-5

15150

50

40

2.2

φ105

φ120

156

92.5

174

174

4005LRN-PP-5

17250

5040

3.7

φ105

φ120

156

92.5

174

174

4007LRN-PP-5

25220

50

40

5.5

φ105

φ120

156

92.5

174

174

A

B

CDEFGH

Screw
depth 30

Screw
depth 30

M16 tap

M16 tap

60Hz LR [Specific gravity 1.2]
Model

Total head Capacity Bore（mm） Motor output（m） （L/min.） Suction Discharge （kW）

2501LRN-PP-6

960

40250.75

φ 90

φ105

168

115.5

156

156

2502LRN-PP-6

13100

40251.5

φ 90

φ105

168

115.5

156

156

4003LRN-PP-6

16150

5040

2.2

φ105

φ120

156

92.5

174

174

4005LRN-PP-619250

5040

3.7

φ105

φ120

156

92.5

174

174

4007LRN-PP-625280

50

405.5

φ105

φ120

156

92.5

174

174

Parts name
MotorShaft
Slit collar
Linear seal ﬂange
Back casing
Hose joint
Impeller
Casing (discharge side)
Casing (suction side)
Flange (discharge side)
Flange (suction side)
O-ringDry seal
Connecting pipe
Shaft sleeve
Rotation disk
Movable seal
Impeller keyImpeller nut
Cut seal
Outer diaphragm base
Oil seal
O-ringOuter diaphragmO-ringO-ringBase
O-ringO-ringO-ringO-ringO-ringLock for oil seal
Safety device (sensor)
Control box
Lab cockMaterial

GH

Screw
depth 30

Screw
depth 30

M16 tap

M16 tap■ Parts table

Ｇ

ＤＣＢ

Ａ

Ｈ

Ｅ
6Ｆ

Quantity
1SUS304
1S45C
1HT.PVC
1PP・UPE
1PP
1PP・UPE
1PP
1PP
1PP
1PP1EPDM・FPM
1FPM
1FC/AL
1HT.PVC
1CFRPP/Ceramics
1CFRPP/FPM
1Titanium
2PP・UPE
1FPM
1CFRPP
1NBR
1EPDM・FPM
1FPM
1EPDM・FPM
1EPDM・FPM
1PET
4EPDM・FPM
1EPDM・FPM
1EPDM・FPM
1EPDM・FPM
1EPDM・FPM
1EPDM・FPM
11PC
1PVC/EPDM
1LRN series Linear seal type chemical slurry pumpPrecautions for installing and piping
YD-LRN series1）Precautions for installing
1. If a large amount of air enters during the operation, the pumping is ineﬃcient and it may cause thepump damage.
● Install the pump so that the suction inlet is 50 cm or more in height over the liquid surface of the tank.
● Prevent projection or up-and-down piping at the suction side.
● Construct the suction piping with 1/100 or higher upgrade toward the pump.
● Use the suction piping which is larger than the pump bore. If the diameter is diﬀerent, use the reducer and adjust the upside of thepump to be horizontal.

2. Install a strainer at the suction inlet to prevent entering dust or foreign objects.
Make sure to periodically clean the strainer and remove clogging to minimize the loss resistance.

3. Under the following piping conditions, it is recommended to install check valves in the rising piping at
the suction side to prevent water hammer.
Also install the bypass pipe for exhaust air in the lower part. (If the piping for exhaust air is notinstalled, self-suction may not be available.)● When the discharge piping becomes longer or the capacity 10m and more.
● When the edge of the discharge pipe is located 9m higher than the liquid surface of the tank.
● When two or more pumps are used in parallel, etc.

4. Create bending sections on the piping to prevent liquid leak or pump deformation because of heat
expansion of the pipe for liquid temperature.
5. Main parts inside the pump are made of resin and make sure the handling carefully.

2）Do not tighten the bolts for the ﬂange excessively
1. Arrange the pipe ﬂange surface and the pump ﬂange surface parallel to one another and do not tighten
the bolts excessively.
2. When installing a ﬂexible joint, SUS loose ﬂange or inner packing at the piping side, be careful of thedeformation to tighten the bolts excessively.

3）Do not apply weight on the pipes.
1. The weight of the pipes should be completely
supported by pipe support apparatuses.

3. Avoid using metal pipes. Use thermoplastic
resin pipes only.

Check valve
Safety device sensor

0.5m

2. Create bending sections and use expansion
joints on the pipes so that the pump will not
be burdened with load from the thermal
expansion of the pipe when the temperature
is high (more than 40℃).

Air release valve
Remove air whenstarting up the pumpinitially.

* Especially, metal piping is frequently used for concentrated
sulfuric acid or caustic soda. Therefore, strictly observe theabove prohibitions 2) and 3) if using it.

Discharge outlet

Suction inlet

7

Tsukuba Factory

Our advanced technology is leading the world’s fluid transfer industry.

Head Office

Tsukuba Factory

3F., ANTEX24, 1-1-14, Taito,Taito-ku, Tokyo, 110-0016 Japan

6127-5, Onogo-machi, Joso-shi,
Ibaraki, 300-2521 Japan 03(5818)5130
 03(5818)5131
E-mail chemical@wcc.co.jp
Sales Department
 03(5818)5131
 03(5818)5130
Overseas Department
 03(5818)5131
 03(5818)5134
E-mail overseas@wcc.co.jp

Nagoya Office
1F., EIKEI Bldg., 1-307, Yashirogaoka, Meitou-ku, Nagoya-shi,Aichi, 465-0051 Japan 052(701)1250
 052(701)1227

Osaka Office
7F., NITTETSU SUMIKIN KOSAN KUJO Bldg., 1-27-6, Kujo, Nishi-ku,
Osaka-shi, Osaka, 550-0027 Japan 06(6584)3160
 06(6584)3185

Fukuoka Office

6F., HAKATA Sun City Bldg. Ⅱ, 3-11-28,Hakataeki-Higashi, Hakata-ku,Fukuoka-shi, Fukuoka, 812-0013 Japan 092(433)0251
 092(433)0250

8

 0297(24)1071

 0297(24)1075

Service Center
6127-5, Onogo-machi, Joso-shi,Ibaraki, 300-2521 Japan 0297(24)1071

 0297(24)1075

Worchemi Taiwan Co., Ltd.
No.13, Lane 513, Shenlin South Rd.,
Daya District, Taichung City 428, 42859 Taiwan R.O.C.
 886-4-2560-9315  886-4-2560-9056
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E-mail worchemi@ms34.hinet.net

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30 Hughes, Suite 203, Irvine, CA 92618, U.S.A
 1-949-462-0900  1-949-462-0999
URL http://www.worldchemicalusa.com
E-mail wca@worldchemicalusa.com

Suzhou World Technology Co.,Ltd.
402, Fu Yuan Road, Xiang Cheng, Economic District., Su Zhou, China
 86-512-6579-8212  86-512-6579-8215
URL http://www.worldchemical.com.cn
E-mail worldchemical@wcs.szbnet.com●●●●●