Pinless Center Line Butterfly Valve

Resilient seated butterfly valve, uses the flexibility of rubber seat, could easily achieve zero leakge, therefore is a widely applied valve in oilfield, agriculture, water & waste water and mining industries. Due to its rubber lined body materials, it is usually used in low pressure lines.  

Pinless design eliminates potential leakage point at the disc/shaft joints, and perform better in high corrosive media, compared to normal pined disc butterfly valve. 

Lug type butterfly valves have threaded inserts at both sides of the valve body. This allows them to be installed into a system using two sets of bolts and nuts. The valve is installed between two flanges using a separate set of bolts for each flange. This setup permits either side of the piping system to be disconnected without disturbing the other side.
A lug type butterfly valve used in dead end service generally has a reduced pressure rating. For example a lug type butterfly valve mounted between two flanges has a 150 psi pressure rating. The same valve mounted with one flange, in dead end service, has a 75 psi rating.

Features of Pinless Center Line Butterfly Valves:

Center Line Resilient Seat
Pinless Design for Better Disc Sealing 
Bi-Directional Sealing
Shutoff and Throttling Operation
Wafer Type, Lug Type or Flanged Type

Applicable Standards of Pinless Center Line Butterfly Valves:
a) Design & Manufacture: API 609, EN 593, AWWA C504
b) Face to Face Dimension: API 609, EN 558
c) End Connection: ASME B16.5, EN 1092
d) Test and Inspection: API 598, EN 12266

Sizes: 2" - 48" or DN50 - DN1200
Pressure Rating: Class150 or PN10 - PN16
Materials of Valve Body: GG25, A126 B, GGG40, A536, WCB, LCB, CF8, CF3, CF8M, CF3M, etc.
Operated by: Lever, Gear, Pneumatic, hydraulic and Electric actuator

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