Power Hydraulics Department  /  Hydraulic valves  /  Controlled check valve - GMZSZ2-160-16-H

Controlled check valve - GMZSZ2-160-16-H

Intended use: GMZSZ2-16-16-H controlled check valve is used for shutting-off oil in flow in one direction with the possibility to control its opening, and for opening the free flow in the opposite direction after control pressure is given.
It is used in the following situations:
- to relieve a circuit which is under pressure
- as protection against falling of load in case when circuit is broken
- as protection against falling of load in case when circuit is broken
It is manufactured in a version allowing its direct installation on a hydraulic cylinder.

gmzsz2.jpg

Operation: In body (1) a plug (2) is screwed in. This plug at the same time constitutes resistance for spring (3)
The spring using the head (4) presses ball (5) against edge (6) and keeps the valve in a closed position. If differential pressure in channel A exceeds opening pressure value set by the spring, the ball (5) moves and the flow from A to B opens. Flow from space B to A will take place when control pressure is supplied to channel X. Pressure in channel X operates on piston rod (7) surface. Piston rod moves and presses head (4) and, having overcome pressure in channel B and spring tensions, it allows for flow from B to A as long as the control pressure in channel X operates.

gmzsz2-1.jpg

Technical data:

Product symbol / Valve

CONTROLLED CHECK VALVE GMZSZ2-160-16-H

Fixed

Pressure [ Mpa ]

16 [ Mpa ]

Viscosity range [ cSt ]

10 ÷ 300 [ cSt ]

Temperature range [ C ] [ K ]

-20 ÷ +80 [ C ] ; 253 ÷ 353 [ K ]

Changeable

Nominal value

16

Flow [ L/min ]

63 [ L/min ]

Pressure of valve opening

0,2 [ Mpa ]

Control pressure of slow release valve

3 [ Mpa ]

Control pressure of main valve

4 [ Mpa ]

Liquid filtering accuracy [ µm ]

10 [ µm ]

L - Length [ mm ]

147

L max - Max length [ mm ]

153

H - Height [ mm ]

101

B - Breadth [ mm ]

38