Category: Eccentric Butterfly Valve

Name: Cast cast steel flange butterfly valve gearbox high quality

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Cast cast steel flange butterfly valve gearbox high quality


A butterfly valve is a valve which can be used for isolating or regulating flow. The closing mechanism takes the form of a disk. 

Operation is similar to that of a ball valve, which allows for quick shut off.

Butterfly valves are generally favored because they are lower in cost to other valve designs as well as being lighter in weight, meaning less support is required.
 
The disc is positioned in the center of the pipe, passing through the disc is a rod connected to an actuator on the outside of the valve.
 
Rotating the actuator turns the disc either parallel or perpendicular to the flow.
Unlike a ball valve, the disc is always present within the flow, therefore a pressure drop is always induced in the flow, regardless of valve position.

Standard:

We can manufacture as per API, DIN,BS ,JIS,GOST ect.


Material:

No. Material
1 Body ASTM A216 WCB ASTM A351 CF8 ASTM A351 CF3 ASTM A351 CF8M
2 Pin ASTM A29-1035/A276 304 ASTM A276 304 ASTM A276 304L ASTM A276 316
3 Disc WCB/CF8/CF8M ASTM A351 CF8 ASTM A351 CF3 ASTM A351 CF8M
4 Seal Ring 304/316+Graphite/PTFE 304+Graphite/PTFE 304L+Graphite/PTFE 316+Graphite/PTFE
5 Retainer Flange A105/A182/F304/F316 A182 F304 A182 F304L A182 F316
6 Bolt B7/B8/B8M B8 B8 B8M
7 Bolt B7 B8 B8 B8M
8 Cover A105 A182 F304 A182 F304L A182 F316
9 Gasket Graphite Graphite Graphite Graphite
10 Bushing 304 + Nitriding 304 + Nitriding 304L + Nitriding 316 + Nitriding
11 Bushing 304 + Nitriding 304 + Nitriding 304L + Nitriding 316 + Nitriding
12 Packing Seat A105/304 304 304L 316
13 Packing Graphite Graphite Graphite Graphite
14 Bolt A193 B7 A193 B8 A193 B8 A193 B8M
15 Gland Flange WCB CF8 CF3 CF8M
16 Nut A194 2H A194 8 A194 8 A194 8M
17 Bolt A193 B7 A193 B8 A193 B8 A193 B8M
18 Yoke WCB WCB WCB WCB


If you need any more information,please feel free to contact us sales@robinsonvalves.com



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