3 inch Gate Valve


Gate valve 3 inch is distinguished by the size to the gate valve, 3 inch gate valve with DN to say DN80.

3 inch Gate Valve

What is a 3 Inch Gate Valve?

ZECO 3 inch gate valve is mainly used for fully open or fully closed switching valves. They are usually not used for throttling purposes, but for slurries, viscous fluids, etc. Gate valves feature a removable wedge that moves with the stem nut. The wedge moves perpendicular to the direction of flow. Gate valves usually have a minimum pressure drop when fully open, provide tight shut-off when fully closed, and remain relatively free of contamination buildup.

Features of 3 Inch Gate Valves

  • The wedge of ZECO 3 inch gate valve are fully guided to the seats. For this purpose, ZECO 3inch gate valve is equipped with integral cast gate, which is wedged at a certain angle to the vertical center line, and its function is to close more and more tightly during the closing process. The gate is cast as a whole, machined and automatically surfacing, and has a ring groove on the surface for a better fit on the seat surface;
  • ZECO won’t because of urgent orders, and ignore the production technological process, ZECO each production line workers, any steps based on by technology department common processes for production and technology department, at the same time, the engineer of the quality department is on the basis of international standards for production of every step for testing to ensure that products are qualified;
  • The seat ring of ZECO 3 inch gate valve is forged and designed to reduce wear during switching and to prevent wear of the valve body and seal rings during flow;
  • After welding and required heat treatment, the seat ring of ZECO 3 inch gate valve shall be thoroughly cleaned by CNC machine and inspected by inspectors before assembly is allowed.

Dimensions & Weight of Gate Valve 3 inch

Pressure Rating Bore  Face to Face Dimension(in mm) Weight
(in mm) RF BW RTJ kg
CLASS 150 76 203 283 216 40
CLASS 300 76 283 283 298 52
CLASS 600 76 356 356 359 85
CLASS 900 72 381 381 384 165
CLASS 1500 69 470 470 473 182
CLASS 2500 57 578 578 584 201

Material of 3 Inch Gate Valve:

No Part Material
1 Body ASTM A536
2 Seat Ring ASTM B62
3 Wedge ASTM A536+B62
4 Stem ASTM B62
5 Bonnet Gasket NBR
6 Bonnet Bolt ASTM A193 B8
7 Bonnet Nut ASTM A194 8
8 Bonnet ASTM A536
9 Backseat ASTM B62
10 Stem Packing EPDM
11 Handwheel KTH330-08