Pearl Swivel Joint

Swivel Joint

PK Series
CATALOGPearl Joint ー Pearl Swivel Joint ーPK Series
Features
A self-aligning type that allows easy pipe laying.
Installation is easy as the product is small and lightweight.
Greasing is not required and maintenance is easy.

Table of Contents
Features........................................................................................................... P1
Service Conditions............................................................................................ P2
Styles............................................................................................................... P2
Structures and Materials.................................................................................... P2
Dimensions...................................................................................................... P3
Masses........................................................................................................... P4
Dynamic Torque................................................................................................ P4
Model Names and Types................................................................................... P5
Precautions on Selection................................................................................... P6
Maintenance..................................................................................................... P7
Product Order.................................................................................................. P7
Product Warranty.............................................................................................. P8

The contents are subject to change without notice.

1

PK Series

Pearl Joint ー Pearl Swivel Joint ーService
使
用 条 Conditions
件Series

PKMax.

Connection

Material(main parts)

Seal
Ring

Style

Size

Taper
Thread(Rc/R)

Ductile Cast Iron
BronzePTFE

1～4

15A～50A

Pressure(MPa)Temperature
(℃)

2.3

230

StylesThe PK series provides four different styles of shapes.
Style 1

Style 2

Style 3

Style 4Structures and Materials

PKSeal Ring
SpringSpring Seat

CoverHex. Bolt
Spring Washer

Body

Shaft

Materials of Main Components(Standard Specification)
Part Name

Material

Shaft

BronzeBody

Ductile Cast Iron
Carbon Steel

Cover

Ductile Cast Iron

Seal Ring

PTFE

Heat-resistant paint is applied toexternal parts.

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

Pearl Joint ー Pearl Swivel Joint ー

Dimensions （PK/PKX）
Style 1

Style 2

Style 3

Style 4■ PK Dimension Table
A1(mm)

Size

A

B

C

DEF

G

H

JK

L

M

N

15A
20A
25A
32A
40A
50A

Rc1/2

R1/2

70

30

84

82

75

100

98

107

24

30

91

6°

Rc3/4

R3/4

85

30

97

93

92

116

111

130

34

38

100

6°

Rc1

R1

100

38

110

120

110

135

143

157

38

48

121

6°

Rc11/4

R11/4

118

45

131

145

140

159

173

196

43

57

137

6°

Rc11/2

R11/2

125

55

140

150

140

170

180

202

54

63

149

6°

Rc2

R2

150

70

165

170

165

203

208

240

6277

1706°

■ PKX Dimension Table
A1(mm)

Size

AB

C

DEFGHJKL

M

N

15A
20A
25A
32A
40A

Rc1/2

R1/2

70

30

84

82

75

100

98

106

24

30

91

6°

Rc3/4

R3/4

85

30

100

94

94

119

113

132

34

38

100

6°

Rc1

R1

100

38

108

120

107

132

143

154

38

48

121

6°

Rc11/4

R11/4

118

45

121

136

130

149

164

186

4357

127

6°

Rc11/2

R11/2

125

55

137

142

130

168

173

192

54

63

149

6°

Note 1) K of 50A is the width across flats of an octagon.
2) L of 32A and 40A is the width across flats of an octagon, and L of 50A is the width across flats createdon the round bar.
3) N is an allowable moving range (angle) of a shaft.
3

PK Series

Pearl Joint ー Pearl Swivel Joint ーMasses■ Masses of PK Series(kg)
StyleSize

1

15A
20A
25A
32A
40A
50A

2

1.1

3

1.0

4

1.0

1.0

1.8

1.5

1.6

1.6

2.8

2.4

2.6

2.5

4.2

3.6

4.0

3.9

5.2

4.8

4.9

5.0

8.0

7.1

7.8

7.0

Dynamic Torque

PK Series

PK Series

Dynamic torque（15A～25A）

Dynamic torque
(N･m)

90

Dynamic torque（32A～50A）

Dynamic torque(N･m)

450

25A

8050A

40070350

20A

60300

50250

40200
15040A

2010032A

1050

3000

15A

0.5

1.0

1.5

2.00

2.5

0

0.5

1.0

1.5

Pressure (MPa)

2.0

2.5

Pressure (MPa)Note 1) Dynamic torque varies depending on product storage conditions, storage period, or fluid types.
2) Starting torque is larger than dynamic torque. Although starting torque is even larger when wringing occurs,
it does not indicate any fault.
3) Data are typical values measured based on in-house test standards. They are not guaranteed values.

4PK Series

Pearl Joint ー Pearl Swivel Joint ー

Model Names and Types

Model NameTypeSize

ＰＫ Ｚ ー ３ Ｓ２５ＡSize

Style
1234U-shape

Liner shape
L-shapeL-shape(opposite)

Option (Part Change/Addition)
﹈

１５Ａ
２０Ａ
２５Ａ

３２Ａ
４０Ａ
5０Ａ

Option (Spacer)Standard specification

Without spacer﹈ (standard specification)

The spring seat shape is changed and a

Ｘ washer and Teflon sheet are added.

Ｓ With spacer

The seal ring is changed to that of theＺ three-part configuration.

Standard Spec : Without Options

Quasi-standard Spec : With Options

Note 1) “␣” indicates a space. A model name is indicated without spaces.
2) If two or more option (part change/addition) codes are selected,
they are indicated in alphabetical order.
3) Option (part change/addition) code X is applicable to sizes 15A - 40A.
If you have any questions, contact our sales representative.

5

PK Series

Pearl Joint ー Pearl Swivel Joint ーPrecautions on Selection

1.

Select a product whose operating conditions are within the service conditions (listed in the table on page 2).

2.

Although the shaft rotates 360° in the swivel direction, the upper limit of its self-aligning angle is 6° (±3°).
When introducing a hose for connecting the product or a movable pipeline for using multiple products,
carefully consider the motion of the hose and the movable pipeline before selecting a style.

3.

Select an option as necessary.
1) See “Model Names and Types” (page 5) for the types of options.
2) If heating and cooling are alternately carried out, select option (part change/addition) code Z.
3) To limit the self-aligning function, select option (spacer) code S.

4.

The use of the product in a continuous rotation condition is not appropriate. The product lifetime becomes 		shortened.

5.

The product is structured so that a shaft and a seal ring closely contact with each other due to fluid pressure anda spring, in order to seal fluid. Therefore, applying excessive load in the direction of pushing the shaft towards thebody reduces the seal face pressure and opens the seal face, easily causing fluid leakage.

6.

The product cannot be used for fluid that causes corrosion on it.

7.

The product is not designed according to the general design rules for safety and hygiene of food processing 		machinery (JIS B 9650). Consult with us when considering the use of the product in food-related facilities.

8.

Depending on the fluid used, the product may subject to restrictions due to national laws or local regulations.
As for customized products, we can produce products with modifications that are not included in the options.
If you have any questions or wish to purchase customized products, contact our sales representative.

6PK Series

Pearl Joint ー Pearl Swivel Joint ー

Maintenance1) Greasing
Greasing is not required for the PK series.

2) Replacement of consumables
You can use the product for an extended period of time by replacing consumables.
Contact us for replacement. We carry it out according to our repair program.
Depending on the products, expenses for purchasing new products may be lower thanrepair expenses.
Contact us for more information.

Product Order

Please provide the following information.

1) When ordering our product you are currently using① Model name (indicated on the product's nameplate)2) When newly ordering our products

Nameplate① Model name (see page 5.)② Related information
・ The name of equipment to which our product is installed
・ The name of the fluid used
・ Fluid pressure and temperature
・ Operation (rotation or swivel) and its frequency
・ Service environment

Nameplate・ Requests, etc.

(Products produced in or before February, 2020.)

If you have any questions, contact our sales representative.

7

PK Series

Pearl Joint ー Pearl Swivel Joint ー

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 themalfunction. If the malfunction was clearly caused by the materials of product components or the manufacturingmethod, we will repair the product in 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.

  ① Failure after the warranty period has expired② Failure caused by use of the product deviating from the service conditions③ Failure caused by misuse (improper storage, installation, pipe laying, operation or maintenance, etc.)④ Failure caused by fluid contaminants or foreign objects in the fluid⑤ Failure caused by relocation, transport, or falling of the product after delivery⑥ Failure caused by disassembly, repair, or modification done by personnel other than our service personnel⑦ Failure of the product attributed to using materials or according to standards specified by the customer⑧ Failure of the product attributed to using materials provided by the customer⑨ Failure 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 this productwarranty provision. Expenses or damages caused by said failures above shall not be covered.

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 be applicable.

6. This product warranty provision shall not restrict the customer's legal rights.

8     No.：SN20010-2
Issued on : Aug.31 2023

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