Gate Valve
It is the most commonly & very widely used valve in industrial piping for isolation of the flow. It is manually operated and it is not recommended for regulation of the flow. Installation of this gate valve is possible from both the ends. Hence it is bi-directional valve.
Gate Valve symbol is given below.
It is the most commonly & very widely used valve in industrial piping for isolation of the flow. It is manually operated and it is not recommended for regulation of the flow. Installation of this gate valve is possible from both the ends. Hence it is bi-directional valve.
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| Gate Valve |
A) End Preparation:
(a) Cast Steel valves have Flanged or Butt weld end preparation.
(b) Forged Steel valves have Socket weld or Threaded end preparation.
B) Design & Dimension Standard:
The dimension Standard for gate valve is as follows.
API 600 For Cast Steel valves (Flanged/BW valves)
API 602 Forged Steel valves (SW/Threaded valves)
ANSI B 16.34 For Pressure & Temperature limitation & Rating
ANSI B 16.10 For face to face dimension of Flanged & BW end
API 598 For Testing of valve
C) Main parts: Gate valve has following main parts.
- Body
- Bonnet
- Internals/Trim/Wetted parts: Parts that come in direct contact with the fluid.
- Gate valve has following Internals/Trim/Wetted parts.
- Wedge / Seat Ring / Stem / Gland Bush
D) Pressure Class:
There are 150,300,600,900,1500,2500 ratings for Flanged & BW valve. There is 800 rating for SW or Threaded valve.
Material: Forged Steel Cast Steel
CS ASTM A 105 ASTM A 216 Gr WCB
LTCS ASTM A 350 Gr LF2 ASTM A 352 Gr LCB
LAS ASTM A 182 Gr F11 ASTM A 217 Gr WC6
ASTM A 182 Gr F22 ASTM A 217 Gr WC9
ASTM A 182 Gr F9
ASTM A 182 Gr F9
SS ASTM A 182 Gr F304 ASTM A 351 Gr CF8
ASTM A 182 Gr F304L ASTM A 351 Gr CF8M
ASTM A 182 Gr F316 ASTM A 351 Gr CF3M
ASTM A 182 Gr F316L ASTM A 351 Gr CF3C
ASTM A 182 Gr F321
ASTM A 182 Gr F321
Gate Valve symbol is given below.
