34SM Manual Hydraulic Valve | 34SM-L10H-T | 34SM-L20H-T | 34SM-L10H-W | NG10 NG20 Manual Reversing Valve

34SM Series Manual Control Hydraulic Directional Valves

Product Overview: The 34SM series manual reversing valves are a dependable solution for directional control in hydraulic systems. Operated directly via a manual lever, these valves require no electrical power, making them ideal for construction machinery, mining equipment, and mobile hydraulic systems where power supply is unavailable. Known for their tactile operational feel, superior sealing, and extended service life under high-pressure conditions, the 34SM series features standardized interfaces (NG10/NG20) for seamless integration into diverse hydraulic circuits.

Featured models include: 34SM-L10H-T, 34SM-L20H-T, and 34SM-L10H-W.

Key Technical Advantages:

• Intuitive Manual Operation: The lever provides moderate travel and clear damping, allowing operators to precisely control the start, stop, and reversal of cylinders or motors.

• High-Pressure Durability: Engineered with high-strength cast iron, the valve body is rated for pressures up to 31.5 MPa (315 bar), ensuring zero deformation and minimal internal leakage under heavy loads.

• Versatile Return/Detent Mechanisms: * Type T (Spring Centered): The spool automatically returns to the neutral position when the handle is released.

  • Type W (Ball Detent): Features a detent mechanism that holds the handle in a specific shifted position without continuous manual force.

• Optimized High-Flow Path: Hydrodynamically designed internal channels minimize flow resistance, significantly reducing system heat and enhancing energy efficiency.

Detailed Specifications & Parameters:

• Featured Model Matrix:

  • 34SM-L10H-T: Size 10 (NG10), L-spool (3-pos, 4-way), spring-centered mechanism.

  • 34SM-L20H-T: Size 20 (NG20), high-flow specification for main circuit control in heavy machinery.

  • 34SM-L10H-W: Size 10 (NG10), featuring a ball detent mechanism to lock the handle in position.

• Core Technical Specs:

  • Mounting Standards: NG10 (Size 10) / NG20 (Size 20).

  • Max Operating Pressure: 31.5 MPa (315 bar).

  • Max Flow Capacity: Up to 120 L/min (NG10); over 200 L/min (NG20).

  • Fluid Compatibility: Mineral oil or hydraulic fluids with equivalent lubricating properties.

Shape and installation dimensions

Thread connection