THM – SV & SL – Check Valves
Ensure absolute load-holding security and eliminate hydraulic shock in your heaviest circuits with the THM SV & SL Series Pilot Operated Check Valves. Engineered to provide fail-safe, fluid-controlled fluid locking, these high-capacity valves process massive flow rates up to 350 L/min while sustaining relentless operating pressures up to 315 bar. Available with advanced pre-opening capabilities for dampened decompression, the SV & SL Series safely bleeds off high-pressure buildup before the main spool opens, protecting your manifolds from violent hammering. Designed with standardized mounting footprints for seamless integration, these valves are the ultimate safety and control solution for the demanding hydraulic systems powering modern civil, road, and earthmoving machinery.
Core Technical Specifications:-
- Valve Architecture: Pilot Operated Check Valve
- Model Series: SV (Standard) / SL (With Leakage Port)
- Standard Sizes: 10, 20
- Maximum Operating Pressure: Up to 315 bar
- Maximum Flow Rate: Up to 350 L/min
- Mounting Standards: Porting pattern to DIN 24 340 form A, ISO 4401, and CETOP-RP 121H
Key Features & Engineering Advantages:-
- Dampened Decompression (Pre-Opening): Available with a specialized pre-opening feature. This two-stage opening process smoothly depressurizes the hydraulic cylinder before allowing full reverse flow, entirely eliminating the destructive hydraulic "bang" and vibration typical in heavy-load applications.
- Absolute Load Holding: The fluid-controlled check mechanism creates an impenetrable, leak-free seal, securely locking massive suspended loads and preventing cylinder drift when directional valves are in the neutral position.
- Versatile Mounting Options: Designed for maximum flexibility in manifold assembly, offering both robust screw-threaded connections and subplate mounting options that strictly conform to DIN 24 340 standards.
- Customizable Cracking Dynamics: Engineered with 4 distinct opening pressures, allowing system designers to finely tune the valve's response to the exact pilot pressure requirements of the specific circuit.
- Optional Leakage Port (SL Series): The SL variant is equipped with a dedicated leakage port, ensuring the pilot piston remains unaffected by backpressure in the return line, guaranteeing reliable opening even in complex, high-pressure-drop systems.
Ideal Industry Applications:-
The massive 350 L/min flow capacity, dampened decompression, and reliable load-holding of the SV & SL Series make it a critical safety component for:
- Heavy Civil & Road Machinery: Securely locking the massive lifting cylinders, leveling screeds, and heavy attachments on large-scale asphalt pavers, motor graders, and road milling machines.
- Heavy Earthmoving Equipment: Preventing main boom and bucket drift on heavy excavators, wheel loaders, and trenching equipment, ensuring loads remain suspended even during sudden power losses.
- Large-Scale Industrial Presses: Providing smooth, shock-free decompression in the massive clamping cylinders of heavy metal-forming presses and plastic injection molding equipment.
- Mobile Material Handling: Serving as the primary fail-safe for the hydraulic winches, boom extensions, and stabilization outriggers on high-capacity industrial cranes.
Why Choose the THM SV & SL Series?
- Eliminates System Shock: The pre-opening decompression protects your entire hydraulic infrastructure from pressure spikes.
- Drop-In Replacement: Standardized ISO and CETOP porting guarantees effortless integration into existing blocks.
- Uncompromising Safety: Ensures heavy loads stay exactly where the operator left them, securing the job site.
