Project Description

A gate valve is a valve that opens by lifting a round or rectangular gate out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are planar, so gate valves are often used when a straight-line flow of fluid and minimum restriction is preferred.

Gate valves are primarily used to permit or prevent the flow of liquids,Gate valves are characterised as having either a rising or a nonrising stem. Rising stems provide a visual indication of valve position because the stem is attached to the gate such that the gate and stem rise and lower together as the valve is operated. Nonrising stem valves may have a pointer threaded onto the upper end of the stem to indicate valve position, since the gate travels up or down the stem on the threads without raising or lowering the stem. Nonrising stems are used underground or where vertical space is limited.

Addcon Gate Valves are Bolted Bonnet, Rising Spindle, Outside Screw & Yoke Type construction. These Gate valves are available with Solid wedge, Flexible wedge, Split wedge, and Parallel sliding wedge designs offer maximum flexibility and option available to customer for their suitable selection. Gate Valve having Deep stuffing box, which provides assure tightness and maximum packing life. Separate properly machined and lapped back seat facilities are provided for replacement of Gland packing when valve is online & under pressure.

We offer extra long, extended bonnet Gate valve for special services. Antifriction thrust bearing is provided in yoke sleeve for higher sizes and classes.

Material Specification

  SERIAL NO   QTY   DESCRIPTION   MATERIAL
1 1+1+1 BODY+BONNET+YOUCK ASTM A 351 GR. CF8 / CF8M / CF3 / CF3M  / ASTM A 216 GR. WCB
2 2 SEAT RING 13% CROME STEEL ASTM A 351 GR. CF8 / CF8M / CF3 / CF3M AISI S.S 304 / S.S 316 / S.S 304 L / S.S 316 L
3 1 WEDGE 13 % CROME STEEL, ASTM A 351 GR. CF8 / CF8M / CF3 / CF3M AISI S.S 304 / S.S 316 / S.S 304 L / S.S 316 L
4 1 STEM / SPINDLE AISI S.S.410 / S.S 304 / S.S 316 / S.S 304 L / S.S 316 L
5 4 / 8 / 12 BONNET / STUD ASTM A 193 Gr. B7 /  B8 / B 8M
6 8 / 16 / 24 BONNET  / NUT ASTM A 194 Gr. 2H /  8 /  8M
7 1 BONNET BUSH AISI S.S.410 / S.S 304 / S.S 316 / S.S 304 L / S.S 316 L
8 1 GASKET CAF/SPIRAL WOUND METALLIC S.S 304/S.S 316 FILLED WITH GRAPHITE
9 1 SET PACKING FLEXIBLE GRAHITE
10 1 HAND WHEEL MALLEABLE IRON

Salient Features

  • Designed For Exceptionally Low Pressure Drop
  • Back Seating Arrangement Permits The Replacement Of Packing With Valve Under Fully Open Condition
  • Deep Stuffing Box Is Providing For Tightness And Maximum Long Packing Life.
  • Specially Designed Die Formed Graphite Packing, Controlled Clearance Between Stem, Gland And Bonnet Bushing For Guaranteed Low Emissions Meet 100 PPM Maximum Fugitive Emission Levels.
  • Stellited Wedge (Gate), Seat Ring & Back Seat Can Also Be Offered On Special Request
  • Self – Aligning Two Piece Gland Available
  • Extra Long, Extended Bonnet Gate Valve For Special Services. Antifriction Thrust Bearing Is Provided In Yoke Sleeve For Higher Sizes And Classes
  • Gear Box / Chain Wheel / Electric Or Pneumatic Actuator Design Available

Design and Testing International Standard

End Connection FLANG END,BUTWELD
Flange Std ASME B 16.5 / CLASS 150 , 300 , 600 BS 10 TABLE D,E,F,H / DIN / IS 6392 DIN STANDARD  / JIS STANDARD / IS STANDARD
BUTWELD STD ASME B 16.25
SOCKET WELD ASME B 16.11
Face to Face ASME B 16.10
Design Std BS 5352 / API 602 / ASME B 16.34
 Testing Std BS EN ISO 12266 – I ( BS 6755 – I) / API 598 / ISO 5208
Product Range ½” to 24″ (15 NB to 550 NB)