Gate valve with hydralic drive (ShZ-GP) is designed for periodic short-term opening of liquid (gas) line as well as for creating a pressure drop between the separator and the production header of the Sputnik automated group metering station. Station works with associated gas and petroleum products.
The design and components are presented in Fig. 1
The device consists of gate valve 1, hydraulic cylinder 2 and has connecting flanges 3 with size corresponding to the flanges of a standard wedge gate valve.
For shut-off the device uses gate 4, which is driven by the lever 5 through the roller 6. Lever 6 is driven through the eyelet 7 and the rod 8 by the hydraulic cylinder 2 when the hydraulic fluid is supplied to the sub-piston cavity. After connecting the sub-piston cavity with the drain, gate 4 under spring 9 action returns to its original position.
Adjustment of gate initial position is performed by screwing rod 10 into eyelet 7 and is locked by nut 11. Open position of gate is regulated by nut 12 and is locked by screw 13.
Fig.1 Gate valve with hydraulic drive ShZ-GP-1
1- gate valve; 2-hydrocylinder; 3- connecting flanges;
4-gate; 5- lever; 6- roller; 7-eyelet; 8 - draft; 9- spring; 10-rod; 11,12-nut; 13- screw.
Parameter
SHZ-GP-1
SHZ-GP-1.1
SHZ-GP-3.1
Parameter value
Nominal pressure according to GOST 356, MPa, max
4.0
Test pressure according to GOST 356, MPa, max
6.0
Inside diameter of valve, mm
41
58
Fluid temperature
-50...+50
Norm of tightness
GOST 9544
Leakage class
А.
Gate width, mm
3
6
5
Overall dimensions, mm, max (length * width * height)
250*160*510
310*195*550
Mass, kg, max
34
45
Mean time between failures is, max - 4500 h;
Life time - 10 years