GP 8 Passage Rotary Union
The GP Series 8 Passage rotating union was designed to transfer (8) independent lines to rotating equipment. All GP Series products feature both female tapped & O-ring face seal shaft connections for increased mounting flexibility.
| part # | thru bore | overall diameter | overall length | min torque* | passage size | slip ring option | |
|---|---|---|---|---|---|---|---|
| GP-180 | --- | 3.437 | 7.488 | 160 | 0.156 | --- | View Model |
| GP-280 | --- | 4.250 | 9.609 | 240 | 0.250 | --- | View Model |
| GP-380 | --- | 4.937 | 10.000 | 330 | 0.375 | --- | View Model |
| GP-480 | --- | 5.625 | 10.000 | 800 | 0.500 | --- | View Model |
All dimensions are shown in inches. Click here to convert to Metric
*This is the minimum torque required to rotate based on zero pressure measured in inch-pounds
Standard electrical slip ring options available.
| Max. Pressure¹ | 7500 PSI (515 BAR) |
| Max. Vacuum¹ | 30 HG |
| Max. Rotational Speed¹ | up to 850 RPM |
| Temperature Range¹ | 0° F to 220° F (-18° C to 105° C)² |
¹Values are dependent on a combination of all application parameters. Please consult with DSTI.
²Applications with temperatures above 220° F (105° C) require alternative seal materials. Please consult with DSTI.
| Connection Sizes | 1/8", 1/4", 3/8", 1/2", 3/4", 1". 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 Coatings | 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 | Coolant, Gases, Oil, Water (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 |






