V Series Guided Piston Relief Valve, Cast Iron, 1 NPT Ports, Spring, Up To 25.00 GPM

Description & Features

Designed around a sliding guided piston mechanism, the V Series Guided Piston Relief Valve, Cast Iron, 1 NPT Ports, Spring, Up To 25.00 GPM from Fulflo Specialties Co delivers stable pressure control across a wide range of industrial fluid applications. The guided piston design minimizes response to transient pressure surges, reducing the chatter, pounding, and squealing common in conventional direct-acting relief valves.

The cast iron housing paired with a hardened steel piston and Buna-N seals supports use with hydraulic oils, water, solvents, and chemicals across varying viscosities. Ports are 1 NPT, the rated flow capacity is 25 GPM, and the spring is calibrated for a pressure range of 150–350 PSI. Unlike poppet or ball check designs, this valve modulates flow progressively rather than snapping open at cracking pressure, providing more linear pressure-flow behavior suited to both load regulation and system protection.

Note: These valves are not intended as positive shut-off devices and are not suitable for use with air, gas, or steam.

SKU: VJ-5-YS-190PSI

Supplier Part Number (MPN): VJ-5R

Specifications

AA
2.28
Adjustment
No
B
2.28
C
2.06
Check Valve
No
Diode
No
Brand
Fulflo Specialties Co
Brand
Fulflo Specialties Co
Pack Size
1.00
UOM
EA
Electrical Flag
No
Features
8.22
Housing
Cast Iron
Piston
Hardened Steel
Ports
1 NPT
Ports
1 NPT
Pressure Range (psi)
507-YS (150-350 PSI)
Rated Flow
25
Rated Flow
25
Remote Control
No
Seal Material
Buna-N
Supplier Part Number
VJ-5-YS-190PSI-SMC
Switch Connector
No
Product Weight
5.40 lbs

Similar Products

Model Number Ports Rated Flow Housing Pressure Range (psi) Piston Seal Material Features AA B C D Price Action
V Series Guided Piston Relief Valve, Cast Iron, 1 NPT Ports,  Spring, Up To 25.00 GPM

VJ-5-YS-190PSI V Series Relief Valve

1 NPT

25

Cast Iron

507-YS (150-350 PSI)

Hardened Steel

Buna-N

8.22

2.28

2.28

2.06

V Series Guided Piston Relief Valve, Cast Iron, 1-1/2 NPT Ports,  Spring, Up To 80.00 GPM

VJ-7-XS V Series Relief Valve

1-1/2 NPT

80

Cast Iron

707-XS (60-175 PSI)

Hardened Steel

Buna-N

11.06

2.69

2.69

2.88

Product Questions & Answers (1)

Question by: Bobby P on Dec 31, 2025, 7:27 PM
Reckon this would be alright for hydraulic oil? I don't want it eating up the seals.
Answer by: Customer Support on Jan 2, 2026, 6:34 AM
Yes, Buna-N seals are compatible with hydraulic oils. The valve housing is cast iron and the piston is hardened steel, all suitable for use with hydraulic fluids.