The three-position valve GA-142/1 consists of a body with fittings, electromagnets with pushers, two buttons, a spool, two balls and a sleeve with a spring. The cavities on the right and left of the pistons are in communication with the inlet fitting. The outlet fittings are in communication with the drain fitting in the initial position. With the electromagnets turned off, the balls close the holes that communicate the pressure line with the drain connection. The pressure line communicates with the cavities on the right and left behind the pistons and holds the spool in the middle position. In this case, the piston and rod cavities of the hydraulic cylinder communicate with the drain through the spool.When the right electromagnet is turned on or the right button is pressed, the pusher squeezes the ball and closes the fluid outlet under pressure into the cavity behind the right piston. In this case, under the pressure of the working fluid, the left piston will move the spool to the right and communicate the inlet fitting with the right outlet. The left outlet nipple will remain connected to the drain nipple. When the left electromagnet is turned on or the left button is pressed, the operation of the crane elements is similar.

1. Working fluid – AMG-10 (GOST 6794-53).
2. Nominal working pressure – 220kgf / cm ^ 2.
3. The minimum pressure at which the product operates in the absence of backwater on the drain is 60kgf / cm ^ 2.
4. Allowable backwater in the drain line, no more – 30kgf / cm ^ 2.
5. Range of working temperatures of the environment. environments – from -60 to +80 ° C.
6. The maximum temperature of the working fluid is +100 ° C.
7. The supply voltage of the electromagnet is -27 ± 10% V.
8. The current consumed by the electromagnet at a voltage of 24V, no more than 1A.
9. Leaks of working fluid at a pressure of 220 kgf / cm ^ 2 and a temperature of + 20 ± 10 С during acceptance tests, no more:
– with the electromagnets turned off in cm ^ 3 for 3 minutes – 2.5,
– with any electromagnet turned on in cm ^ 3 for 3 minutes – 15.
10. The operating mode of the electromagnet is long-term.
11. Atmospheric pressure – up to 18.6 mm Hg. Art.

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