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THM – MPW Series – Pilot Operated Check Modular Valves

Boost the operational safety and reliability of your hydraulic circuits with the THM MPW Series Pilot Operated Check Modular Valve. Engineered to act as a fail-safe in safety-critical systems, this valve allows for free fluid circulation in one direction while strictly preventing any unauthorized reversal or backflow. Designed in a highly compact, industry-standard NG6 footprint, the MPW Series features a highly accurate, low cracking pressure of 2 to 4 Bar, ensuring exceptionally smooth and controlled fluid release. By integrating this pilot-operated check valve into your manifold, you protect expensive pumps, motors, and cylinder circuits from the catastrophic effects of sudden reverse flow, ensuring long-lasting performance in heavy-duty mobile and industrial machinery.

Core Technical Specifications:-

  • Valve Architecture: Pilot Operated Check Modular Valve
  • Standard Size: NG6
  • Cracking Pressure: 2 to 4 Bar
  • Design Profile: Controlled Backflow Prevention, Low Pressure Drop, Stackable


Key Features & Engineering Advantages:-

  • Fail-Safe Backflow Prevention: The pilot-operated design delivers absolute, leak-free locking of fluid in one direction. This prevents cylinder drift and secures heavy suspended loads, neutralizing the risk of damaging reverse flow in safety-critical systems.
  • Low Cracking Pressure (2–4 Bar): Engineered to open smoothly with minimal resistance, ensuring that the valve operates with high accuracy and does not cause energy-draining bottlenecks when intentional reverse flow is commanded.
  • Minimized Pressure Drop: The internal fluid galleries are hydro-dynamically optimized to allow high volumes of fluid to pass through with very low resistance, directly enhancing the overall energy efficiency of the hydraulic power unit.
  • Space-Saving NG6 Modularity: The standardized NG6 structure allows the valve to be easily stacked directly beneath directional control valves. This drastically reduces the need for bulky external plumbing, tightening the manifold footprint for compact machinery.
  • Heavy-Duty Construction: Manufactured from robust, high-grade materials to guarantee an extended working life, even when subjected to the continuous pressure cycles and abrasive vibrations of demanding outdoor environments.


Ideal Industry Applications:-

The compact stacking, precise 2-4 bar cracking pressure, and fail-safe backflow prevention of the MPW Series make it an essential structural component for:

  • Heavy Civil & Road Machinery: Serving as a critical safety lock for the heavy lifting cylinders, suspension components, and leveling blades on asphalt pavers, motor graders, and road milling machines.
  • Mobile Construction Equipment: Securing the massive boom and bucket circuits on heavy excavators and wheel loaders, ensuring loads do not drift when the main directional valves are centered.
  • Complex Multi-Actuator Systems: Providing controlled-release and pump protection in integrated manifolds that drive multiple hydraulic motors and cylinders simultaneously.
  • Safety-Critical Industrial Machinery: Acting as the primary backflow prevention mechanism in high-pressure metal-forming presses and automated manufacturing equipment.

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