Triple Offset Butterfly Valve BW Ends

We are a leading manufactuer of oil and gas industry valves, we have more than 15years experience in producing cast steel BW ends Triple Offset Butterfly Valve. he main function of butterfly valve is to control fluid flow rate in pipeline: turn gear box or other actuator, the disc of butterfly valve types will rotate; lock the disc at the specified angle by locking device; the fluid flow rate depends on the disc angle; when the disc is turned 90℃ to the valve bore center line, the pipeline is cut off. 

The Butterfly control valves are differentiated from their on-off block cousins by the name high-performance butterfly valve. In simple terms, the high-performance butterfly control valve is a quarter-turn rotary-motion valve that uses a rotating round disk as a regulating element.

When fully open, the disk of triple offset butterfly valve actually extends into the pipe itself, which makes butterfly valve distinct from other valve designs. The wafer type Butterfly valve bodies have very narrow face to face dimensions compared to other types of valves, allowing the body to be installed between two pipe flanges without any special end connections. This type of arrangement is called a through bolt connection and is only permissible with certain bolt lengths.

The triple offset butterfly valve is valve designed specifically for high-performance throttling services, using a disk that is offset from the center of the valve body.

For throttling services, eccentric butterfly valves are designed with a disc that is offset from the center of the valve body. When butterfly valves are automated, eccentric butterfly valves are preferred since the disc does not make contacting with the seat until closing, which prevents premature wear of the seat with the continual positioning associated with automated throttling.

Standard:

Basic Design: EN593, API609, MSS SP-68

Face to Face: ISO5752, EN558, API 609

Connecting Ends: EN1092-2, ASME B16.5, ASME B16.47 A

Test: EN12266-1, API 598

Design Feature:

Double Flange Ends, BW, LUG, Wafer Connecting

Eccentric Disc to Eliminating Friction between Disc and Seat

Unidirectional

Soft Seat or Metal to Metal Seat

Size Range: DN100 to DN1200 or 4” to 48"

Pressure Class: PN10, PN16, PN25, PN40, PN60, PN100, ANSI Class 150 to Class 600

Material:

Body: WCB, LCB, LCC, WC5, WC6, WC9, CF8, CF8M, CF3, CF3M, 4A, 5A

Disc: WCB, LCB, LCC, WC5, WC6, WC9, CF8, CF8M, CF3, CF3M, 4A, 5A

Shaft: SS416, SS431, F304, F316, F51, 17-4PH

Seat: PTFE, SS316 +Graphite, Completely Metal to Metal

Operation:

Gear, Electric Actuator, Pneumatic Actuator

Optional:

Stem Extension, Cryogenic Service, AUMA ROTORK Actuator, Carboline Painting, NACE MR 01-75

Thanks for your selection of RSF’s cast steel BW ends triple offset butterfly valve, lug type butterfly valve or wafer type butterfly valve! If you have any inquiries of our oil and gas industry valves, please don’t hesitate to contact with us!