Welcome to Ningbo Hyforce Hydraulic Machinery Co., Ltd.
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| Quantity: | |
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MRV-02-P-K-1, MRV-02-A-K-1, MRV-02-B-K-1, MRV-02-W-K-1, MRV-03-P-K-1, MRV-03-A-K-1, MRV-03-B-K-1, MRV-03-W-K-1, MRV-04-P-K-1, MRV-04-A-K-1, MRV-04-B-K-1, MRV-04-W-K-1, MRV-04-P-K-2, MRV-04-A-K-2, etc.
HYFORCE HYDRAULICS / OEM is also avaliable.
B11-B12
The MRV Series Modular Relief Valve is a compact, high-precision pressure control component designed for modular hydraulic systems. This stackable relief valve provides reliable system pressure limitation and circuit protection while eliminating the need for external piping. Available in multiple configurations to suit various flow and pressure requirements, the MRV series integrates seamlessly with standard modular valve stacks.
Function | Description |
|---|---|
Pressure Limiting | Limits maximum system pressure by diverting excess pump flow to tank when preset pressure is reached |
System Protection | Prevents component damage from pressure spikes and overload conditions |
Pressure Regulation | Maintains consistent system pressure within tight tolerances for stable operation |
Modular Integration | Direct sandwich mounting between directional valves and subplates simplifies system assembly |
Manual Adjustment | Knurled adjustment knob allows precise pressure setting without special tools |
Injection Molding Machines – Protecting molds and hydraulic components from pressure overload
Machine Tools – Maintaining consistent clamping and cutting pressures
Mobile Hydraulic Equipment – Pressure control in compact excavators, skid-steer loaders, and agricultural machinery
Industrial Presses – Safeguarding dies and tooling from excessive force
Material Handling Systems – Controlling lifting and conveying pressures
Test Stands and Simulation Equipment – Precise pressure regulation for R&D applications
The MRV serves as the main system relief valve in compact hydraulic power units. Mounted directly on the pressure port (P-port) of a modular valve assembly, it limits maximum working pressure across the entire circuit. When the pump output exceeds the set pressure, the valve opens smoothly to return excess flow to tank, preventing pump cavitation and motor overload.
In multi-circuit hydraulic systems, multiple MRV valves can be installed at different points to create independent pressure zones. For example, in a hydraulic press with separate clamping and pressing circuits, one MRV maintains high pressure for the pressing ram while another provides lower pressure for the clamping system—optimizing energy usage and component sizing.
When used with hydraulic accumulators, the MRV acts as a critical safety device. It prevents over-pressurization during charging cycles and provides a controlled relief path during system shutdown. The modular design allows direct mounting adjacent to accumulator isolation valves, minimizing pressure drop and response time.
In complex systems with pilot-operated directional valves or proportional controls, the MRV can be configured to regulate pilot circuit pressure separately from the main system. This ensures consistent, contamination-resistant control signals for improved valve response and positioning accuracy.
During emergency stop conditions or maintenance procedures, the MRV provides a reliable path for rapid system depressurization. Its direct-acting design ensures immediate response regardless of main system flow conditions, enhancing operational safety.
Compact Sandwich Design – Eliminates external piping and reduces installation footprint by up to 40% compared to inline relief valves
Fast Response Characteristics – Direct-acting poppet design ensures rapid opening and closing for minimal pressure overshoot
Stable Pressure Regulation – Hardened seat and precision-machined components provide consistent cracking pressure and minimal hysteresis
Wide Adjustment Range – Pressure settings available from 7 bar (100 psi) to 315 bar (4,570 psi) to cover diverse application requirements
Visual Pressure Indication – Optional pressure gauge port allows direct monitoring of regulated pressure
Tamper-Resistant Option – Lockable adjustment cap available for safety-critical applications requiring fixed pressure settings
Parameter | Typical Range |
|---|---|
Max. Operating Pressure | 315 bar (4,570 psi) |
Max. Flow Capacity | Up to 200 L/min (53 GPM) |
Pressure Adjustment Range | 7–315 bar (100–4,570 psi) |
Mounting Pattern | ISO 4401 / CETOP 03, 05, 07 |
Operating Temperature | -20°C to +80°C (-4°F to +176°F) |
Fluid Compatibility | Mineral oil, phosphate ester, water-glycol |
The modular construction of the MRV series enables vertical stacking with other modular components such as directional valves, flow control valves, and check valves. This configuration:
Reduces potential leak points by eliminating threaded pipe connections
Simplifies troubleshooting through visible valve positioning
Enables rapid system modification without disturbing existing piping
Improves system aesthetics and cleanliness for industrial environments
The MRV Series Modular Relief Valve is the ideal solution for designers and maintenance professionals seeking reliable pressure control with maximum installation flexibility and minimal space requirements.
