HVH 4 Passage Rotary Union

HVH Series rotary unions offer larger flow passages and increased flow volume than the GP(S) Series. HVH Series rotary unions are suitable for vacuum & bidirectional pressures up to 5000 PSI and feature a protected ball bearing design suitable for harsh / outdoor environments.

All HVH Series rotary unions feature heavy-duty alloy steel construction with corrosion resistant nitride surface treatment and are available with electrical slip ring options for power/data transfer.

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part #	thru bore	overall diameter	overall length	min torque*	passage size	download
HVH-3541	0.750	6.438	11.283	50	0.750	---
HVH-3641	0.750	6.438	12.283	50	0.875	---
HVH-3741	0.750	7.438	13.664	150	1.250	---
HVH-3841	0.750	8.938	14.878	150	1.500	---

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 foot-pounds

Max. Pressure¹	5000 PSI (345 BAR)
Max. Vacuum¹	30 HG
Max. Rotational Speed¹	up to 50 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	.75", .875", 1.250", 1.500". Other sizes available upon request.
Connection Type	SAE threads standard. BSPP and other thread options are available.
Plating and Coatings	Nitride plating is standard. Anodized, E-Nickel, Chrome, Ceramic and other specialty platings are available.
Materials	Alloy steel is the standard material for the HVH Series. Stainless Steel, Aluminum, Brass, and other materials are available on a custom basis.
Mounting Options	The HVH series unions have individual female SAE passages standard. There are also tapped holes on the end of the housing & bolt slots on the shaft flange for mounting the assembly.
Slip Ring Options	The HVH 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.