THM – CPDT/CPDG/CPDF – Pilot operated check valve
Ensure absolute load-holding security and smooth hydraulic sequencing with the THM CPDT / CPDG / CPDF Series Pilot Operated Check Valve. Engineered to lock fluid in a circuit and prevent cylinder drift, this advanced valve allows free flow in one direction while completely blocking reverse flow until a specific pilot pressure is applied. Capable of handling massive rated flow capacities up to 500 L/min and sustaining maximum pressures of 250 kgf/cm², it is built for the most demanding heavy-duty applications. Featuring an innovative two-step design that operates at lower pilot pressures to drastically reduce hydraulic impulse noise, this series delivers the refined, ultra-reliable load-holding performance required by modern civil, road, and earthmoving machinery.
Core Technical Specifications:-
- Valve Architecture: Pilot Operated Check Valve
- Maximum Operating Pressure: 250 kgf/cm²
- Rated Flow Capacity: 50, 125, 315, 500 L/min
- Design Profile: Two-Step Noise Reduction, Positive Load Holding
Key Features & Engineering Advantages
- Positive Load Holding: By allowing free flow in one direction and strictly preventing reverse flow, this valve securely locks hydraulic cylinders in place. This maintains strict internal system pressure and prevents suspended loads from drifting downward over time.
- Pilot-Activated Reverse Flow: When the machine operator commands a reverse action, a specified pilot/cracking pressure is applied to the valve, instantly opening the internal poppet to allow the fluid to flow freely in the reverse direction.
- Advanced Two-Step Noise Reduction: Unlike standard check valves that can "bang" or shudder when opened under load, this series features an interchanged two-step internal design. This allows the valve to operate smoothly at lower pilot pressures, drastically reducing violent hydraulic impulses and operational noise.
- High Flow Processing: Ranging from 50 L/min up to a massive 500 L/min, the diverse size availability (CPDT, CPDG, CPDF) ensures that you can precisely match the valve to the exact volumetric requirements of your system, minimizing energy-wasting pressure drops.
- Structural Durability: Precision-machined to endure the continuous high-pressure cycles (250 kgf/cm²) and abrasive vibrations inherent in heavy-duty outdoor environments.
Ideal Industry Applications:-
The fail-proof load holding, high flow capacity, and shock-reducing design of the CPDT / CPDG / CPDF Series make it a critical safety component for:
- Heavy Civil & Road Machinery: Securely locking the heavy leveling screeds, lifting arms, and suspension cylinders on large-scale asphalt pavers, motor graders, and road milling machines without any mechanical drift.
- Mobile Earthmoving Equipment: Holding the massive boom, stick, and bucket cylinders perfectly stationary on heavy excavators and wheel loaders when the directional valves are centered.
- Heavy-Duty Material Handling: Serving as the primary load-holding safety mechanism for hydraulic winches, industrial cranes, and automated lifting platforms.
- Large-Scale Industrial Presses: Maintaining strict clamping pressures in heavy metal-forming and plastic injection molding equipment during the curing or stamping cycles.
