Ball valve, Gate valve,Globe valve,Check valve,Plug valve,Butterfly valve,Valve parts

catalogue:

Forged gate,globe,check valve.pdf

Brief introduction for the API gate valve.

The open-close part name is gate,that  this forged gate valve only can fully open or fully closed, they can not adjust the flow,the gate have two sealing face and the sealing face are wedge type,the gate  solid gate type ,the forged gate valves only have small size. the biggest size up to 3"(DN80) and highest pressure can arrive to 3000LB(PN500).about the type of connection between the body and bonneet, it also have three type, one is bolt bonnet,anther is welded bonnet and the third type is pressure seal bonnet. they are use for the different pressure.

The kind of this Forged steel gate valve.

We can divided into two types according to the  type of stem, one is non-rising stem gate valve, anther is rising stem gate valve,non-rising stem gate valve is mean that the screw of stem are in the body , we don't see the stem rising or decline when we opened and closed the gate valve, rising stem gate valve is mean that the screw of the stem are out of the body,we can see the stem rising or decline when we opened and closed the gate valve .

We also can divided into two types according to structure of the gate, one type is wedge gate valve, anther type is flat gate valve,wedge gate valve is mean the sealing face of the gate is wedge type(it have angle between them),flat gate valve is mean the sealing face of the gate is parallel type,wedge gate valve must rely on exogenic action to  mechanical seal,but flat gate valve can rely on  pressure of the medium to seal. so teh wedge gate valve have the bigger market than flat gate valve.

Advantage for the gate valve

All of the gate valve are full bore,so they have the very small fluid resistance and the sealing face is very resistant to shock and wear.

The flow of medium is not restricted when valves are installed in the pipeline.they have simple structure and have the short face to face.so the price is lower than ball valve.

Matters needing attention during installation

The workers must clean up the impurities in the piping and valves before the gate valve installed on the piping line.

Features: Gate Valve 900Lb~1500Lb Standard Material Specifications NO. Part Name CS to ASTM AS to ASTM SS to ASTM Type A105 Type F22 Type F304(L) Type F316(L) 1 Body A105 A182 F22 A182 F304(L) A182 F316(L) 2 Seat Ring A276 420 A276 304 A276 304(L) A276 316(L) 3 Wedge A276 430&410 A182 F304 A182 F304(L) A182 F316(L) 4 Stem A182 F6 A182 F304 A182 F304(L) A182 F316(L) 5 Gasket Corrugated SS+graphite SS+PTFE 6 Bonnet A105 A182 F22 A182 F304(L) A182 F316(L) 7 Bonnet Bolt A193 B7 A193 B16 A193 B8 A193 B8M 8 Pin A276 420 A276 304 9 Gland A276 410 A182 F304(L) A182 F316(L) 10 Gland Eyebolt A193 B7 A193 B16 A193 B8 A193 B8M 11 Gland Flange A105 A182 F11 A182 F304(L) A182 F316(L) 12 Gland Nut A194 2H A194 4 A194 8 A194 8M 13 Yoke Nut A276 420 14 H.W.Lock Nut A194 2H A194 4 A194 8 A194 8M 15 Nameplate SS 16 Handwheel A197 17 Bearing Gasket A473 431 18 Stem Packing Flexible Graphite PTFE Suitable Medium W.O.G.etc W.O.G.etc HNO3,CH3OOH etc Suitable Temperature -29~425 -29~550 -29~180 Dimensions (mm) and Weights (Kg) NPS Conv. 3/8" 1/2" 3/4" 1" 1-1/4" 1-1/2" 2" Full 3/8" 1/2" 3/4" 1" 1-1/4" 1-1/2" 2" L 92 111 111 120 120 140 178 210 H(OPRN) 169 197 197 236 246 283