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NAI-LOK® RV Series Proportional Relief Valves - Reliable Overpressure Protection
NAI-LOK® RV Series proportional relief valves provide simple, reliable overpressure protection for industrial applications. Designed to open gradually as pressure increases, these valves help protect workers and maintain proper process conditions.The set pressure can be configured at the factory or easily adjusted in the field to accommodate changing operating requirements. Each valve is factory-set, tested, locked, and tagged with its specified pressure setting for guaranteed performance.
Proportional Relief Design - Smooth pressure control with gradual opening
Space-Saving Design - Compact body ideal for installation in tight spaces.
Externally Adjustable Cracking Pressure - Easy tuning without disassembly.
Factory-Tested Reliability - 100% tested for crack and reseal performance.
Wide Temperature Range - Operates from -10°F to 400°F (-23°C to 204°C).
Secure Pressure Setting - Lock wire ensures settings remain intact.
Versatile End Connections - Compatible with tube fittings or male/female threading.
NAI-LOK PSV Factory High Quality Spring Load SS316 Pressure Safety Valve Cracking Pressure 2500psi 1/2 male npt Inlet and Outlet female NPT 225psi Relief Valve
Orifice Size: 4.8 mm (0.19 in)
Cracking Pressure: Adjustable (affected by outlet pressure)
Material: High-quality construction for durability
Testing: Full factory validation for crack and reseal performance
| Product Name | RV Series Relief Valve |
| Cracking Pressure Range | RV1:15-225 psig / 1-155 bar to atmosphere RV2: 225-6000 psig /16-414 bar to atmosphere |
| Max working pressure | RV1: 300 psig /21 bar RV2: 6000 sig/414 bar |
| Spring Types | Blue:15-225 psig /1-15.5 bar Yellow.225-750 psig/15.5-51.5 bar Purple:750-1500 psig /51.5-104 bar |
| RV1 | N | 4 | S | ||||
| Basic Series | End Connection | Size | Cracking pressure | Material | |||
| RV1 RV2 |
N-NAI-LOK F-Female NPT M-Male NPT |
4-1/4in. 6-3/8 in. 8-1/2 in. |
L-15-225psi(2.5-15.5bar) A-220-350psi(15.1-24bar) B-350-750psi(24-51.6bar) C-750-1500psi(51.6-103bar) D-1500-2250psi(103-155bar) E-2250-3000psi(155-206bar) F-3000-4000psi(206-275bar) G-4000-5000psi(275-344bar) H-5000-6000psi(344-413bar) |
S-316 Stainless steel | |||
Hydraulic systems / Pneumatic controls /Process instrumentation /Industrial machinery
Precision Engineering - Ensures consistent pressure management.
Durable & Reliable - Built for demanding environments.
Easy Installation & Maintenance - User-friendly design.
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