"1) manual replacement valve

Apply manual lever back to transform the spool status. Different spring active reset (a) 2 types with spring steel beads (b).

2) Flexible commutation valve

The flexible commutation valve is also known as the routine valve, and it is important to use the stop of the mechanical moving parts, and also help the barrier iron or concave wheel on the table to force the spool to master the direction of the liquid flow.

3) Electromagnetic replacement valve

The electric power-on score of the disadvantage is taken off and the electromagnet is released indirectly into the direction of the spool. It is a doubt converting element between it is non-electrical and hydraulic systems.

Structure of the solenoid valve for two-bit three-way. At the position, the oil port P and A are connected, the oil port B is broken; when the electromagnetic ferroelectric calligraphy, the pulley 1 pulls the spool 2 to Zuo Rui, then the oil heart P battle A is broken, and B is connected. When the electromagnet is disconnected, the spring 3 advances the valve compartment. Replace the graphic symbol.

4) Liquid change valve

The pressure oil holding the oil passage is applied to the reversing valve of the spool position. The valve core is not moved back to the pressure differential of the oil fluid of the secondary end. When the pressure oil enters the left cavity from K2, K1 turns back oil, the valve core moves to the right, so that the P and B are connected, the A and T are in communication; when K1 traffic pressure oil, K2 traffic oil return, valve core Left movement, make P and A communication, B and T are in communication; when K1 battle K2 is turned back to the oil, the spool returns to the two positions.

5) Electro-hydraulic replacement valve

Composed of the electromagnetic sputum valve with the hydraulic valve. The electromagnetic valve is a volt conduction, which can transform the rolling direction, thereby changing the position of the liquid moving valve. Used in the largest hydraulic equipment. "

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