Optimize your complex hydraulic lifting and lowering circuits with the HD FD Series Check Q Meter. Available through THM Hydraulics, this highly sophisticated flow control valve is specifically engineered to prevent heavy, runaway loads from moving faster than the pump's supplied flow rate. Acting as a pilot-operated, leak-free check valve, it holds suspended loads securely and regulates the lowering speed with absolute precision. Capable of handling intense operating pressures up to 315 bar and massive flow rates up to 500 L/min, the HD FD Series provides the ultra-reliable, judder-free performance required for the most demanding industrial and mobile applications across India.

Core Technical Specifications:-

• Component Architecture: Pilot Operated Check Q Meter (Load Control Valve)
• Model Type: HD-FD
• Maximum Operating Pressure: Up to 315 bar
• Maximum Flow Capacity: Up to 500 L/min
• Standardization: Porting pattern to DIN 24 340 Form D, ISO 5781, and CETOP-RP 121 H
• Mounting Styles: Subplate mounting, Threaded connection, Manifold mounting (Cartridge valve), and SAE flange connections

Key Features & Engineering Advantages:-

• Proportional Flow Regulation: The check Q meter intelligently controls the returning flow in direct relation to the flow being directed into the opposite side of the actuator.
• Area Ratio Compensation: Specifically designed to account for the differential area ratios in hydraulic cylinders, ensuring smooth, controlled lowering regardless of the load weight.
• Leak-Free Load Holding: Functions natively as a pilot-operated check valve that completely locks the fluid, holding heavy suspended loads dead-steady with zero internal leakage when the directional valve is centered.
• Integrated Bypass Valve: Permits free, unrestricted fluid flow in the opposite direction, allowing for rapid cylinder extension or lifting without energy loss.
• Optional Secondary Pressure Relief: Models utilizing the SAE flange connection can be equipped with an optional built-on secondary pressure relief valve. This protects your hydraulic actuators from severe shock pressure overloads or thermal fluid expansion.
• Ultimate Mounting Versatility: With four distinct mounting options—including space-saving cartridge designs and robust SAE flanges—this valve adapts seamlessly to any custom manifold block or hard-piped system architecture.

Ideal Industry Applications:-

The massive 500 L/min capacity and absolute load control make the HD FD Check Q Meter the premier choice for:

• Mobile Cranes & Excavators: Regulating the boom and winch lowering speeds to prevent heavy, suspended loads from dropping erratically.
• Heavy Industrial Presses: Controlling the exact downward velocity of high-tonnage pressing platens to ensure safe, synchronized forming.
• Material Handling & Lifting Platforms: Providing fail-safe load holding and ultra-smooth descent for industrial elevators and scissor lifts.
• Marine & Offshore Winches: Maintaining steady, controlled unspooling of heavy cables in harsh, high-tension environments.

Why Choose the HD FD Series?

• Eliminate Load Runaway: Never worry about gravity taking over your hydraulic cylinders. The Q Meter ensures your load only moves as fast as your pump dictates.
• Adaptable to Any Setup: Whether you need a threaded in-line valve, a subplate mount, or a cartridge insert, the FD series has a configuration that perfectly fits your machine's layout.
• Built-In Cylinder Protection: The optional secondary relief valve acts as the ultimate insurance policy for your expensive actuators, venting dangerous pressure spikes before they cause catastrophic seal failure.