Product Overview
The RVP Series plate-mounted check valves — comprising RVP6-10B, RVP8-10B, RVP10-10B, RVP12-10B, RVP16-10B, RVP20-10B, RVP25-10B, and RVP30-10B — are unidirectional flow control devices engineered for hydraulic systems, allowing free flow in one direction while completely blocking reverse flow.
Featuring a poppet-type design, the valve spool stroke is limited by a spring retainer, with an internal spring maintaining the spool in a normally closed position to minimize pressure drop. The series supports plate mounting (compliant with ISO 6020/2 and DIN standards) for direct installation onto hydraulic valve blocks, offering convenient assembly and disassembly — ideal for compact spatial layouts or systems requiring frequent maintenance.
As a high-performance alternative to original branded products, the RVP series delivers full performance parity with leading international brands (including Rexroth and HYDAC equivalents), featuring 100% form-fit-function interchangeability without modification to mounting interfaces. Every unit undergoes 100% simulated in-service testing prior to shipment, ensuring proven reliability under real-world operating conditions.
Technical Specifications
Model Series: RVP6-10B / RVP8-10B / RVP10-10B / RVP12-10B / RVP16-10B / RVP20-10B / RVP25-10B / RVP30-10B
Nominal Diameter (mm): 6 / 8 / 10 / 12 / 16 / 20 / 25 / 30
Rated Pressure (MPa): 31.5 (uniform across series)
Maximum Operating Pressure (MPa): 31.5
Cracking Pressure (MPa): 0.05
Rated Flow (L/min): 15 / 30 / 50 / 80 / 100 / 200 / 300 / 380
Maximum Flow (L/min): Up to 600 across the series
Connection Type: Plate-mounted
Control Type: Direct-acting
Body Material: Cast Iron / Carbon Steel
Sealing Material: FKM (Fluorocarbon Rubber)
Medium: Hydraulic Oil
Operating Temperature Range: -30℃ to +80℃
Weight (kg): 0.26 / 0.50 / 0.80 / 1.10 / 2.25 / 3.90 / 6.70 / 11.0
Key Technical Advantages
1. Poppet-Type Design with Minimal Pressure Drop
The RVP series employs a precision poppet-type structure with metal-to-metal sealing between the spool and seat. Compared to ball-type or spool-type designs, this configuration delivers superior sealing performance and significantly lower flow resistance. This design ensures minimal pressure loss during forward flow, substantially improving overall system efficiency.
2. High Volumetric Efficiency & Leak-Free Sealing
The spool is held in a normally closed position by an internal spring, achieving zero-leakage sealing in the reverse flow direction. Precision-mated spool and seat surfaces (surface roughness achievable below Ra0.4) maintain reliable sealing performance under pressures up to 31.5MPa, effectively preventing system pressure bleed-down.
3. Extended Service Life & High Durability
The spool and seat are manufactured from wear-resistant alloy materials with hardening treatment for superior abrasion resistance. Springs are fabricated from high-grade alloy steel and subjected to fatigue life testing, ensuring stable cracking pressure over millions of actuation cycles. Product design life significantly exceeds industry standards.
4. Modular Plate Mounting with Superior Compatibility
The product strictly adheres to internationally standardized plate-mounting interfaces, offering full interchangeability with original branded products (Rexroth, HYDAC, and equivalents). The mounting face features standardized O-ring sealing grooves, enabling seamless replacement without modifying the hydraulic manifold — substantially reducing retrofit costs and system downtime.
5. Low-Noise Operation
Optimized flow channel geometry and precisely matched spring parameters effectively suppress impact and vibration during spool opening and closing cycles, delivering significantly lower operating noise than comparable products and improving the working environment.
Application Areas
Hydraulic Pump Discharge Protection: Installed at pump outlets to prevent reverse rotation or damage caused by sudden system pressure release
Backpressure Circuits: Functions as a backpressure valve to provide stable counter-pressure for actuators, improving motion smoothness
Bypass Applications: Serves as a safety bypass element in filter or cooler bypass circuits
Multi-Circuit Isolation: Provides unidirectional isolation between different hydraulic circuits to prevent cross-interference
Hydraulic Manifold Integration: Combines with other valve types (directional, throttle, relief valves) on integrated valve blocks
Target Equipment: Injection molding machines, die-casting machines, construction equipment (excavators, loaders), metallurgical equipment, machine tool hydraulic systems, marine hydraulic systems, and more
Expert Maintenance Tips
Pre-Installation Cleaning: Thoroughly clean the valve block mounting surface and ports prior to installation to prevent contaminants (chips, burrs) from entering the valve body. Use lint-free wipes with clean hydraulic oil; never use cotton rags due to fiber residue risks.
O-Ring Replacement: Replace the mounting face O-ring seals after every disassembly and inspect the seal groove for damage. Use original-equivalent FKM seals to ensure temperature and oil compatibility.
Torque Control: Tighten mounting bolts in a diagonal sequence using a torque wrench in gradual increments. Avoid over-tightening on one side, which may cause valve body distortion or seal failure. Refer to the product installation manual for specific torque values.
Fluid Cleanliness Management: Maintain system fluid cleanliness at ISO 4406 18/16/13 or higher (NAS 1638 Class 8 or better) to maximize spool and seat service life. Install a filter with ≤10μm rating upstream of the valve where feasible.
Periodic Cracking Pressure Verification: Test the check valve cracking pressure every 2,000 operating hours or annually. If the cracking pressure deviates by more than ±10% from the 0.05MPa nominal value, schedule inspection or replacement of the spool assembly.
