Explain why 4/2 DCV is preferred for hydraulic & 5/2 DCV for pneumatic systems.

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written 5.7 years ago by

teamques10 ★ 67k

4/2 DCV in hydraulic system and 5/2 DCV in pneumaticsystem because of following difference

4/2 DCV in hydraulic system	5/2 DCV in pneumatic system
In hydraulic system, in four-way 4/2 DCVs, two flows of the fluids are controlled at the same time.	1)Most 5/2-way valves have a movable spool with seals along the length in a cylinder. By moving the spool through the cylinder, the valve ports are connected or blocked. Also the valve can be direct operated or pilot operated. With direct operation, the actuator is directly connected to the spool....2)They are quick to operate because of small switching movement....3)In pneumatic system, the 4-way spool valve can be controlled by using two operators, one on each end or by a spring return and a single operator( 5/2). The flow path when actuated at the 14 end of the valve is from port 1 to port 4 and from port 2 to port 3. Port 5 is blocked. When the valve is actuated from the 1 2 end, the flow path is from port 1 to port 2 and from port 4 to port 5. Port 3 is blocked. Each cylinder port has a separate exhaust port. ...............

4/2 DCV in hydraulic system

5/2 DCV in pneumatic system

In hydraulic system, in four-way 4/2 DCVs, two flows of the fluids are controlled at the same time. enter image description here

1)Most 5/2-way valves have a movable spool with seals along the length in a cylinder. By moving the spool through the cylinder, the valve ports are connected or blocked. Also the valve can be direct operated or pilot operated. With direct operation, the actuator is directly connected to the spool....2)They are quick to operate because of small switching movement....3)In pneumatic system, the 4-way spool valve can be controlled by using two operators, one on each end or by a spring return and a single operator( 5/2). The flow path when actuated at the 14 end of the valve is from port 1 to port 4 and from port 2 to port 3. Port 5 is blocked. When the valve is actuated from the 1 2 end, the flow path is from port 1 to port 2 and from port 4 to port 5. Port 3 is blocked. Each cylinder port has a separate exhaust port. ............... enter image description here

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