GP(S) 3 Passage Rotary Union

The GP Series 3 Passage rotary unions are commonly used for applications that require a supply/return line plus an additional line for a separate media. DSTI’s exclusive DynaSeal™ seals allow all GP Series products to be used to safely pass multiple medias.

All GP Series rotary unions are available in stainless steel (GPS) See GPS Examples»

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Specifications
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part #	thru bore	overall diameter	overall length	min torque*	passage size	slip ring option	download
GP-130	---	2.687	4.147	25	0.156	---	PDF CAD
GP-131	0.500	2.937	4.186	30	0.156		PDF CAD
GP-230	---	3.187	5.290	90	0.250	---	PDF CAD
GP-231	0.750	3.750	5.601	100	0.250		PDF CAD
GP-330	---	3.875	6.030	100	0.375	---	PDF CAD
GP-331	0.750	4.187	6.342	130	0.375		PDF CAD
GP-430	---	4.250	7.061	110	0.500	---	PDF CAD
GP-431	0.750	4.937	7.406	120	0.500		PDF CAD
GP-530	---	5.250	8.280	450	0.750	---	PDF CAD
GP-630	---	6.937	10.570	600	1.000	---	PDF CAD

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

Max. Pressure¹	7500 PSI (515 BAR)
Max. Vacuum¹	30 HG
Max. Rotational Speed¹	up to 850 RPM
Max. Temperature¹	350° F (176° C)²

¹Values are dependent on application parameters. Please consult with DSTI.
²High temperature applications may require alternative seal materials. Please consult with DSTI.

Connection Sizes	1/8", 1/4", 3/8", 1/2". Other sizes available upon request.
Connection Type	NPT threads standard. SAE, BSPP, NPTF, and other thread options are available
Plating and Coatings	Black oxide plating is standard. Anodized, E-Nickel, Chrome, Nitride, Ceramic and other specialty platings are available.
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 RotaRing™ 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.
O-ring Face Seal Options	O-ring face seal options available for 10 & 12 passage GP(S) Series models. Please add "-NP" to the part number. Example: GP-201-10-NP