GP(S) Series - General Purpose

General purpose, multiple passage options

The GP and GPS (stainless steel) Series multiple passage rotary unions are available in 2, 3, 4, 6, 8, 10 & 12 passage models.
Modified or specialized configurations are also available.

All GP and GPS Series rotary unions incorporate exclusive DynaSeal™ seals, which are suitable for vacuum and bidirectional pressures up to 51.5 MPa (515 bar).
All passages are individually sealed to allow use with dissimilar medias.

GPS (Stainless Steel) Rotary Unions

PART # PASS. CONNECT. THRU BORE OVERALL DIAMETER OVERALL LENGTH MIN TORQUE PASSAGE SIZE SLIP RING OPTION
SPECIFICATIONS
 

GP(S)
120

2

1/8" NPT

No

61.9 mm

85.0 mm

2.26 Nm

4.0 mm

No

GP(S)
121

2

1/8" NPT

12.7 mm

74.6 mm

92.4 mm

4.52 Nm

4.0 mm

Yes

GP(S)
220

2

1/4" NPT

No

74.6 mm

111.1 mm

6.78 Nm

6.4 mm

No

GP(S)
221

2

1/4" NPT

19.0 mm

95.2 mm

121.2 mm

10.17 Nm

6.4 mm

Yes

GP(S)
320

2

3/8" NPT

No

80.9 mm

119.5 mm

5.65 Nm

9.5 mm

No

GP(S)
321

2

3/8" NPT

19.0 mm

106.3 mm

134.9 mm

9.04 Nm

9.5 mm

Yes

GP(S)
420

2

1/2" NPT

No

98.4 mm

137.0 mm

9.04 Nm

12.7 mm

No

GP(S)
421

2

1/2" NPT

19.0 mm

125.4 mm

158.0 mm

12.43 Nm

12.7 mm

Yes

GP(S)
621

2

1" NPT

25.4 mm

182.6 mm

218.4 mm

84.75 Nm

25.4 mm

Yes

GP(S)
130

3

1/8" NPT

No

68.2 mm

105.3 mm

2.83 Nm

4.0 mm

No

GP(S)
131

3

1/8" NPT

12.7 mm

74.6 mm

106.3 mm

3.39 Nm

4.0 mm

Yes

GP(S)
230

3

1/4" NPT

No

80.9 mm

134.4 mm

10.17 Nm

6.3 mm

No

GP(S)
231

3

1/4" NPT

19.0 mm

95.2 mm

142.3 mm

11.30 Nm

6.3 mm

Yes

GP(S)
330

3

3/8" NPT

No

98.4 mm

153.2 mm

11.30 Nm

9.5 mm

No

GP(S)
331

3

3/8" NPT

19.0 mm

106.3 mm

161.1 mm

14.69 Nm

9.5 mm

Yes

GP(S)
430

3

1/2" NPT

No

107.9 mm

179.3 mm

12.43 Nm

12.7 mm

No

GP(S)
431

3

1/2" NPT

19.0 mm

125.4 mm

188.1 mm

13.56 Nm

12.7 mm

Yes

GP(S)
530

3

3/4" NPT

No

133.3 mm

210.3 mm

50.85 Nm

19.0 mm

No

GP(S)
630

3

1" NPT

No

176.2 mm

268.5 mm

67.80 Nm

25.4 mm

No

GP(S)
140

4

1/8" NPT

No

68.2 mm

119.3 mm

3.39 Nm

4.0 mm

No

GP(S)
141

4

1/8" NPT

12.7 mm

74.6 mm

120.3 mm

4.52 Nm

4.0 mm

Yes

GP(S)
240

4

1/4" NPT

No

80.9 mm

155.4 mm

12.43 Nm

6.3 mm

No

GP(S)
241

4

1/4" NPT

19.0 mm

95.2 mm

160.7 mm

14.69 Nm

6.3 mm

Yes

GP(S)
340

4

3/8" NPT

No

38.4 mm

177.3 mm

16.95 Nm

9.5 mm

No

GP(S)
341

4

3/8" NPT

19.0 mm

106.3 mm

187.2 mm

18.08 Nm

9.5 mm

Yes

GP(S)
440

4

1/2" NPT

No

107.9 mm

209.5 mm

15.82 Nm

12.7 mm

No

GP(S)
441

4

1/2" NPT

19.0 mm

125.4 mm

218.2 mm

33.90 Nm

12.7 mm

Yes

GP(S)
540

4

3/4" NPT

No

133.3 mm

247.1 mm

50.85 Nm

19.0 mm

No

GP(S)
641

4

1" NPT

25.4 mm

182.6 mm

309.6 mm

146.9 Nm

25.4 mm

Yes

GP(S)
161

6

1/8" NPT

15.9 mm

80.9 mm

164.7 mm

11.30 Nm

4.0 mm

Yes

GP(S)
261

6

1/4" NPT

19.0 mm

101.6 mm

207.6 mm

15.82 Nm

6.3 mm

Yes

GP(S)
361

6

3/8" NPT

19.0 mm

107.9 mm

227.7 mm

31.64 Nm

9.5 mm

Yes

GP(S)
460

6

1/2" NPT

No

125.4 mm

254.0 mm

67.80 Nm

12.7 mm

No

GP(S)
561

6

3/4" NPT

25.4 mm

163.5 mm

336.0 mm

124.30 Nm

19.0 mm

Yes

GP(S)
180

8

1/8" NPT

No

87.3 mm

190.2 mm

18.08 Nm

4.0 mm

No

GP(S)
280

8

1/4" NPT

No

107.9 mm

244.0 mm

27.12 Nm

6.3 mm

No

GP(S)
380

8

3/8" NPT

No

125.4 mm

254.0 mm

37.29 Nm

9.5 mm

No

GP(S)
480

8

1/2" NPT

No

142.9 mm

254.0 mm

90.40 Nm

12.7 mm

No

GP(S)
20110

10

1/4" NPT

19.0 mm

93.6 mm

245.0 mm

29.38 Nm

6.3 mm

Yes

GP(S)
30110

10

3/8" NPT

19.0 mm

100.0 mm

345.9 mm

32.77 Nm

9.5 mm

Yes

GP(S)
20112

12

1/4" NPT

19.0 mm

112.7 mm

339.9 mm

45.20 Nm

6.3 mm

Yes

GP(S)
30112

12

3/8" NPT

19.0 mm

125.4 mm

390.4 mm

49.72 Nm

9.5 mm

Yes



OPERATING INFORMATION
 

 MAXIMUM PRESSURE 1

51.5 MPa (515 bar)

 MAXIMUM VACUUM 1

30 mm Hg

 MAX. ROTATIONAL SPEED 1

up to 500 RPM

 TEMPERATURE RANGE 1

-18°C to 105°C 2

1 Values are dependent on a combination of all application parameters. Please consult PES.
2 Applications with temperatures above 105°C require alternative seal materials. Please consult PES.


OPTIONS
 
 CONNECTION SIZES

1/8", 1/4", 3/8", 1/2", 3/4", 1" NPT,
Other sizes available upon request

 CONNECTION TYPE

NPT & BSPP threads standard. SAE, NPTF, and other thread options are available on a custom basis.

 PLATING AND COATING

Black oxide plating is standard. Anodized, E-Nickel, Chrome, Nitride, Ceramic and other specialty platings are available as custom options.

 MATERIALS

Carbon steel is the standard material for the GP Series, Stainless Steel is the standard material for the GPS Series. Aluminum, Brass, and other materials are available on a custom basis.

 MOUNTING OPTIONS

The GP series unions have a unique shaft configuration that consists of individual female tapped passages with an o-ring gland around each for optional flange mounting. There are also tapped holes on the end of the housing for mounting the assembly.

 SLIP RING OPTIONS

The GP Series unions are available with a number of  electrical slip ring options for power, signal and data transfer.
The assembly is available with an aluminum cover to protect
the slip ring during use in demanding environments.

 MEDIA TYPES

Air/Gas, Chemical (GPS models only), DI / Tap Water (GPS models only), Oil, Water/Glycol (GPS models only)

 O-RING FACE SEAL OPTIONS

O-ring face seal options available for 10 & 12 passage GP Series models. Please add "-OF" to the part number. Example: GP-201-10-OF

 

DRAWINGS
 

 GP(S)-120 ( 2 x 1/8" NPT )

GP(S)-120 PDF

GP(S)-120 DWG

GP(S)-120 STEP

 GP(S)-121 ( 2 x 1/8" NPT )

GP(S)-121 PDF

GP(S)-121 DWG

GP(S)-121 STEP

 GP(S)-220 ( 2 x 1/4" NPT )

GP(S)-220 PDF

GP(S)-220 DWG

GP(S)-220 STEP

 GP(S)-221 ( 2 x 1/4" NPT )

GP(S)-221 PDF

GP(S)-221 DWG

GP(S)-221 STEP

 GP(S)-320 ( 2 x 3/8" NPT )

GP(S)-320 PDF

GP(S)-320 DWG

GP(S)-320 STEP

 GP(S)-321 ( 2 x 3/8" NPT )

GP(S)-321 PDF

GP(S)-321 DWG

GP(S)-321 STEP

 GP(S)-420 ( 2 x 1/2" NPT )

GP(S)-420 PDF

GP(S)-420 DWG

GP(S)-420 STEP

 GP(S)-421 ( 2 x 1/2" NPT )

GP(S)-421 PDF

GP(S)-421 DWG

GP(S)-421 STEP

 GP(S)-621 ( 2 x 1" NPT )

GP(S)-621 PDF GP(S)-621 DWG GP(S)-621 STEP

 GP(S)-130 ( 3 x 1/8" NPT )

GP(S)-130 PDF GP(S)-130 DWG GP(S)-130 STEP

 GP(S)-131 ( 3 x 1/8" NPT )

GP(S)-131 PDF GP(S)-131 DWG GP(S)-131 STEP

 GP(S)-230 ( 3 x 1/4" NPT )

GP(S)-230 PDF GP(S)-230 DWG GP(S)-230 STEP

 GP(S)-231 ( 3 x 1/4" NPT )

GP(S)-231 PDF GP(S)-231 DWG GP(S)-231 STEP

 GP(S)-330 ( 3 x 3/8" NPT )

GP(S)-330 PDF GP(S)-330 DWG GP(S)-330 STEP

 GP(S)-331 ( 3 x 3/8" NPT )

GP(S)-331 PDF GP(S)-331 DWG GP(S)-331 STEP

 GP(S)-430 ( 3 x 1/2" NPT )

GP(S)-430 PDF GP(S)-430 DWG GP(S)-430 STEP

 GP(S)-431 ( 3 x 1/2" NPT )

GP(S)-431 PDF GP(S)-431 DWG GP(S)-431 STEP

 GP(S)-530 ( 3 x 3/4" NPT )

GP(S)-530 PDF GP(S)-530 DWG GP(S)-530 STEP

 GP(S)-630 ( 3 x 1" NPT )

GP(S)-630 PDF GP(S)-630 DWG GP(S)-630 STEP

 GP(S)-140 ( 4 x 1/8" NPT )

GP(S)-140 PDF GP(S)-140 DWG GP(S)-140 STEP

 GP(S)-141 ( 4 x 1/8" NPT )

GP(S)-141 PDF GP(S)-141 DWG GP(S)-141 STEP

 GP(S)-240 ( 4 x 1/4" NPT )

GP(S)-240 PDF GP(S)-240 DWG GP(S)-240 STEP

 GP(S)-241 ( 4 x 1/4" NPT )

GP(S)-241 PDF GP(S)-241 DWG GP(S)-241 STEP

 GP(S)-340 ( 4 x 3/8" NPT )

GP(S)-340 PDF GP(S)-340 DWG GP(S)-340 STEP

 GP(S)-341 ( 4 x 3/8" NPT )

GP(S)-341 PDF GP(S)-341 DWG GP(S)-341 STEP

 GP(S)-440 ( 4 x 1/2" NPT )

GP(S)-440 PDF GP(S)-440 DWG GP(S)-440 STEP

 GP(S)-441 ( 4 x 1/2" NPT )

GP(S)-441 PDF GP(S)-441 DWG GP(S)-441 STEP

 GP(S)-540 ( 4 x 3/4" NPT )

GP(S)-540 PDF GP(S)-540 DWG GP(S)-540 STEP

 GP(S)-641 ( 4 x 1" NPT )

GP(S)-641 PDF GP(S)-641 DWG GP(S)-641 STEP

 GP(S)-161 ( 6 x 1/8" NPT )

GP(S)-161 PDF GP(S)-161 DWG GP(S)-161 STEP

 GP(S)-261 ( 6 x 1/4" NPT )

GP(S)-261 PDF GP(S)-261 DWG GP(S)-261 STEP

 GP(S)-361 ( 6 x 3/8" NPT )

GP(S)-361 PDF GP(S)-361 DWG GP(S)-361 STEP

 GP(S)-460 ( 6 x 1/2" NPT )

GP(S)-460 PDF GP(S)-460 DWG GP(S)-460 STEP

 GP(S)-561 ( 6 x 3/4" NPT )

GP(S)-561 PDF GP(S)-561 DWG GP(S)-561 STEP

 GP(S)-180 ( 8 x 1/8" NPT )

GP(S)-180 PDF GP(S)-180 DWG GP(S)-180 STEP

 GP(S)-280 ( 8 x 1/4" NPT )

GP(S)-280 PDF GP(S)-280 DWG GP(S)-280 STEP

 GP(S)-380 ( 8 x 3/8" NPT )

GP(S)-380 PDF GP(S)-380 DWG GP(S)-380 STEP

 GP(S)-480 ( 8 x 1/2" NPT )

GP(S)-480 PDF GP(S)-480 DWG GP(S)-480 STEP

 GP(S)-20110 ( 10 x 1/4" NPT )

GP(S)-20110 PDF GP(S)-20110 DWG GP(S)-20110 STEP

 GP(S)-30110 ( 10 x 3/8" NPT )

GP(S)-30110 PDF GP(S)-30110 DWG GP(S)-30110 STEP

 GP(S)-20112 ( 12 x 1/4" NPT )

GP(S)-20112 PDF GP(S)-20112 DWG GP(S)-20112 STEP

 GP(S)-30112 ( 12 x 3/8" NPT )

GP(S)-30112 PDF GP(S)-30112 DWG GP(S)-30112 STEP

 

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