RVP6-10B RVP8-10B RVP10-10B RVP12-10B RVP16-10B RVP20-10B RVP25-10B RVP30-10B | Rexroth Check Valve 31.5MPa

Product Overview

The RVP6-10B / RVP8-10B / RVP10-10B / RVP12-10B / RVP16-10B / RVP20-10B / RVP25-10B / RVP30-10B series are plate-mounted check valves (non-return valves), fully compatible with Rexroth and Huade Hydraulic equivalent models. The task of the RVP series check valve is to provide leakage-free blocking in one direction while permitting free flow in the opposite direction. Featuring a subplate mounting design, these valves are widely used for pump outlet protection, circuit isolation, return line anti-backflow, and pressure-holding applications in combination with other hydraulic valves.

The RVP series covers a complete range of nominal sizes from NG6 to NG32, accommodating diverse flow requirements across various hydraulic systems. The valve employs a poppet-type seat design with precision-ground sealing surfaces, delivering reliable leakage-free shut-off performance.

Every unit supplied undergoes 100% simulated real-world condition testing to guarantee reliable performance under rated pressure and flow. The product offers drop-in interchangeability, requiring no modifications for direct replacement of Rexroth and Huade Hydraulic original components.

Technical Specifications 

Note: The following parameters are compiled based on publicly available technical data for the Rexroth RVP series and Huade Hydraulic RVP-type plate-mounted check valves.

• Product Series: RVP Series Plate-Mounted Check Valve

• Compatible Brands: Rexroth / Huade Hydraulic

• Models Available: RVP6-10B, RVP8-10B, RVP10-10B, RVP12-10B, RVP16-10B, RVP20-10B, RVP25-10B, RVP30-10B

• Nominal Sizes (NG): NG6, NG8, NG10, NG12, NG16, NG20, NG25, NG30

• Max. Working Pressure: 31.5 MPa (315 bar)

• Opening Pressure: 0.05 MPa (approx. 0.5 bar)

• Max. Flow Rate: Up to 600 L/min (dependent on nominal size)

• Valve Type: Poppet-type, spring-loaded seat design

• Mounting Type: Subplate Mounting

• Interface Standard: Conforms to ISO 4401

• Working Fluid: Hydraulic oil (mineral oil based)

• Body Material: Cast Iron / Ductile Iron

• Operating Temperature Range: -30°C ~ +80°C

• Flow Characteristics: P1 → P2 free flow; P2 → P1 leakage-free blocking

• Design Features: Direct-acting, spring-return

Key Technical Advantages

1. Poppet-Type Seat Design – Leakage-Free Shut-Off Performance

The valve employs a poppet in line contact with a precision-ground hardened seat. Unlike spool-type designs, the poppet-type seat configuration delivers true leakage-free sealing in the blocking direction, making it ideal for pressure-holding applications and load-holding circuits.

2. Comprehensive Size Range – Flexible System Matching

The RVP series offers a complete range of nominal sizes from NG6 through NG32 (6, 8, 10, 12, 16, 20, 25, 30), with maximum flow coverage from tens of liters per minute up to 600 L/min. Whether for small machine tool hydraulic systems or large press circuits, there is a corresponding model available.

3. Subplate Mounting Design – Easy Maintenance & Superior Interchangeability

Featuring ISO-standard subplate mounting interfaces, the RVP series is fully compatible with Rexroth and Huade Hydraulic equivalent models. Installation and removal can be performed without disassembling piping, significantly reducing maintenance time and costs. The product offers drop-in interchangeability—an ideal replacement solution for equipment repair and system upgrades.

4. 31.5MPa High-Pressure Capacity – Suited for High-Pressure Hydraulic Systems

Rated working pressure of 31.5 MPa (315 bar)meets the high-pressure requirements of the vast majority of industrial hydraulic systems. Whether for high-pressure pump outlet protection or anti-backflow protection of high-pressure actuators, the RVP series delivers reliable performance.

5. Wide Temperature Adaptability – Suitable for Diverse Operating Environments

Operating temperature range covers -30°C to +80°C, adapting to everything from outdoor operations in cold regions to continuous operation in high-temperature workshop environments.

Application Areas

• Hydraulic Pump Outlet Protection – Installed at pump outlets to prevent system pressure back-surge damaging the pump

• Circuit Isolation Between Different Oil Lines – Prevents pressure cross-talk and flow interference between multiple circuits

• Return Line Anti-Backflow – Prevents oil backflow in return lines from affecting normal system operation

• Pressure-Holding Circuits – Used in conjunction with accumulators to maintain system pressure

• Combination with Other Hydraulic Valves – Serves as an auxiliary component in directional or pressure control valve assemblies

• Injection Molding Machine Hydraulic Systems – Circuit isolation and pressure-holding for clamping and ejection circuits

• Die-Casting Machine Hydraulic Systems – Directional control and anti-backflow in high-pressure casting processes

• Metal Forming Equipment – Pump outlet protection for presses, bending machines, and shears

• Construction Machinery Hydraulic Systems – Circuit isolation for travel and implement hydraulic circuits

Expert Maintenance Tips

Sizing Guidelines:

1. Nominal Size Selection – Select the appropriate NG size based on the system’s maximum flow rate. Excessive flow will result in increased pressure drop and insufficient poppet lift; insufficient flow leads to unnecessary cost and space waste.

2. Opening Pressure Verification – The standard RVP series opening pressure is 0.05 MPa (approx. 0.5 bar). If your system has special opening pressure requirements (e.g., low-pressure opening or high-pressure preload), please consult our technical team for available options.

Installation Guidelines:

3. Mounting Surface Cleanliness – Thoroughly clean the valve body base and manifold mounting surface before installation to ensure no metal chips, oil contamination, or old gasket residue remains, preventing contaminants from entering the valve and compromising sealing performance.

4. Mounting Bolt Torque – Tighten mounting bolts evenly in a cross pattern using a torque wrench to the specified torque. Over-tightening may deform the valve body and cause spool sticking; under-tightening may cause interface leakage.

5. Flow Direction Confirmation – Before installation, verify that the oil flow direction matches the directional arrow marked on the valve body (P1→P2 is the free flow direction; P2→P1 is the blocking direction). Reverse installation will prevent the system from functioning properly.

6. Fluid Cleanliness Control – Maintain system fluid cleanliness at NAS 1638 Class 9 or ISO 4406 17/15/12 or better. The poppet-type design is sensitive to particulate contamination in the fluid, which can damage the seat sealing surfaces and cause internal leakage.

Routine Maintenance:

• Periodically inspect the valve body-to-manifold interface for external leakage

• If system pressure-holding capacity decreases or actuators exhibit slow creeping, prioritize inspection of the check valve seat sealing surfaces for wear or foreign material

• When replacing or servicing, take care to protect the seat sealing surfaces from scratches