Relief Valve. Pre-set at 2,300 to 2,700 psi. Non-adjustable. 1/8" male NPTF inlet.

Description & Features

This SPX Hydraulic Technologies relief valve provides an economical solution for protecting hydraulic circuits from over-pressurization.

Factory pre-set to relieve between 2,300 and 2,700 psi, this non-adjustable valve features a 1/8" male NPTF inlet and a maximum flow rate of 5 GPM.

Typically used with single- or double-acting cylinders, the relief valve permits adjusting operating pressures below the pump's relief valve setting.

SKU: RV21278-25

Supplier Part Number (MPN): RV21278-25

Alternate Part Numbers: C1KN19

Connection Type FNPT	Grp Application Single- or double-acting cylinders. Permits adjusting operating pressures at various values below relief valve setting of pump. Operation: Regulator valve is easily adjusted to maintain pressures between 300 and 10,000 psi. Maintains a given pressure sett	grp RV21278 Relief Valves Application: Provide An Economical Means of Protecting A Hydraulic Circuit Against Over Pressurization, Factory Pre-set, Maximum Flow Rate of 5 gpm, 1/8 NPTF Male inlet	Media Hydraulic Oil	Series RV21278 Series

Question by: Gary H on Mar 8, 2026, 6:48 PM

got a small power unit and i need a relief valve that aint adjustable, what pressure range is this one set for?

Answer by: Customer Support on Mar 9, 2026, 9:31 PM

Factory setting on this valve is in the 2,300 to 2,700 psi relief range, and it is non-adjustable.