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| Item: | Hydraulic Valves | Material: | Cast Iron |
|---|---|---|---|
| Apply To: | Telescopic Boom Fork Lifts | Spool: | 4 Spools |
| Max Operation Pressure: | 315 Bar | Control Type: | Manual Control Type |
| Highlight: | ForkLifts High Pressure Directional Control Valve,High pressure directional control valve,Directional Control Valve High Pressure |
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high pressure directional control valve Walvoil SD8-4 for Telescopic boom fork lifts
HSSD series directional control valve, flow range of 30-400L/min,
can meet different flow requirements; Its compact, heavy and simple design, can be used in a variety of work scenarios for open or closed centre hydraulic systems; stable performance, a variety of control methods to choose
Control type: manual, cable, pneumatic,
electro-hydraulic,solenoid, etc.
Circuit type: parallel
Application :
Cranes, Telescopic boom fork lifts, Back-hoe Excavators and Compactors.
| flow rate | 80 liters |
| number of spools | 4spools |
| inlet section valve | side inlet, with relief valve |
| relief valve set pressure | 315bar |
| inlet port size | G3/8,G1/2, G3/4 |
| spool type | 3 positon, double acting |
| handle side arrangement | standard type |
| spool cap side arrangement | 3position, spring return,manual control,detent control, |
| working section arrangement | standard type |
| work port size | G3/8,G1/2,G4/3,G1 |
| outlet section type | top outlet,side |
| outlet port size | G3/8,G1/2,G4/3,G1 |
Forklift Hydraulic Control Valve - The function of directional control valves is to be able to direct the fluid to the desired actuator. Generally, these control valves include a spool located in a housing made either of cast iron or steel. The spool slides to different positions within the housing. Intersecting grooves and channels direct the fluid based on the spool's position.
The spool is centrally located, help in place with springs. In this particular position, the supply fluid could be blocked and returned to the tank. When the spool is slid to a side, the hydraulic fluid is directed to an actuator and provides a return path from the actuator to tank. When the spool is transferred to the opposite direction, the supply and return paths are switched. Once the spool is allowed to return to the center or neutral location, the actuator fluid paths become blocked, locking it into position.
The directional control is usually made to be stackable. They generally have a valve for every hydraulic cylinder and a fluid input which supplies all the valves in the stack.
Tolerances are maintained really tightly, to be able to tackle the higher pressures and to be able to prevent leaking. The spools will often have a clearance inside the housing no less than 25 µm or a thousandth of an inch. To be able to prevent jamming the valve's extremely sensitive parts and distorting the valve, the valve block will be mounted to the machine' frame with a 3-point pattern.
The position of the spool could be actuated by hydraulic pilot pressure, mechanical levers, or solenoids that push the spool right or left. A seal enables a part of the spool to protrude outside the housing where it is easy to get to to the actuator.
The main valve block controls the stack of directional control valves by flow performance and capacity. Some of these valves are designed to be proportional, like a proportional flow rate to the valve position, while other valves are designed to be on-off. The control valve is among the most costly and sensitive components of a hydraulic circuit.
Tel: 86-311-68123061
Fax: 86-010-80115555-568844
