LHDV33P-15-M6-400/440 HAWE Load-Holding Valve

Product Overview

The LHDV33P-15-M6-400/440 is a HAWE LHDV 33 series load-holding valve (drop-rate braking valve). Featuring special damping characteristics, it is designed for use with proportional directional valves (e.g. PSL/PSV) to control load-lowering speed and prevent uncontrolled movement. Maximum operating pressure is 420 bar with maximum flow of 80 L/min. The P-15 configuration includes a shock-valve option, with pressure settings in the 400/440 bar range. These valves offer true interchangeability as drop-in replacements for original HAWE units. Every valve undergoes precision machining and 100% simulated duty-cycle testing to ensure zero leakage, reliable load holding and smooth control.

Technical Specifications 

• Model: LHDV33P-15-M6-400/440 (HAWE LHDV 33 Series)
• Type: Load-holding valve (single valve, with shock-valve option)
• Maximum Operating Pressure: 420 bar
• Maximum Flow: 80 L/min
• Flow Adaptation Code: M (approx. 60 L/min class in higher pressure range)
• Pressure Setting: Approx. 400/440 bar (load-holding / shock valve)
• Pilot Ratio: Adjustable (typical 1:1.18 to 1:8.2)
• Permitted Return Pressure: Max. approx. 10 bar
• Weight: Approx. 1.8 kg (P-15 single valve)
• Ports: G 1/2 etc. (ISO 228)
• Leakage: Zero leakage (poppet design)

Key Technical Advantages

1. Special damping characteristics – Finely adjustable damping provides smoother operation than conventional load-holding valves, ideal for proportional control circuits.
2. High-pressure high-flow capability – Up to 420 bar and 80 L/min meets the demands of lifting and mobile machinery.
3. True interchangeability and modular design – Standard interfaces enable direct replacement of original HAWE valves and support single/twin configurations.
4. Zero-leakage poppet construction – Reliable load holding verified by 100% duty-cycle testing for long-term stability and safety.

Application Areas

Ideal for cranes, construction machinery, lifting equipment, concrete pump trucks, cylinder load-holding applications and any mobile or stationary hydraulic system requiring safe controlled lowering.

Expert Maintenance Tips

Ensure correct flow direction and port connections during installation; adjust pressure settings slowly within the permitted range and lock them; maintain high fluid cleanliness; periodically check damping elements and seals; after prolonged storage, verify free valve-element movement.