Hand operated butterfly valve of Weidouli are widely used in chemical industry, petrochemical industry, marine development, smelting, etc., as regulating and closing equipment.

 

The seat and disc of our bidirectional butterfly valve employ the most advanced technology to complete the structural design. At the very moment when the disc opens and closes, the disc produces a cam action, which can pull the disc with less effort, greatly reduces the wear and deformation of the valve seat, and increases the service life of the valve.

 

The Details Of Butterfly Valves

 

The Drawing Of Butterfly Valves

 

Types Of Butterfly Valves

 

Titanium Butterfly Valves

 

Nickel Butterfly Valves

 

Monel Butterfly Valves

 

Hastelloy Butterfly Valves

 

Inconel Butterfly Valves

 

Duplex Butterfly Valves

 

Super Austenitic Butterfly Valves

 

NAB C95800 Butterfly Valves

 

Stainless Steel Butterfly Valves

 

Zirconium Butterfly Valves

 

Tantalum Butterfly Valves

 

Weidouli Butterfly Valves Have Double offset And Triple Offset Both Types

 

ASME  butterfly valve as citing
Design1	API 609
Testing	API 598
Face to face dimension	API 609
Flange ends dimension2	ASME B16.5,ASME B16.47 Series A
Pressure Temperature Rating	ASME B16.34
Visual inspection of casting	MSS-SP-55

 

Notes:

*Other designs are available upon request. BS EN593,DIN,JIS,GB /T 12238etc.

 

Double offset butterfly valves specification:

 

Anti-static

Blow-out proof stem

V type packing

Zero leakage

Ends: Wafer, Lug.

Unidirectional/Bi-directional sealing

Operation: Lever, Gear, Electric, Pneumatic actuator

Bare shaft with ISO 5211 top mounting flange

 

Applicable seat materials of double offset butterfly valves

 

PTFE

RPTFE(15% Glass Filled)

RPTFE(25% Carbon Filled)

Viton

Other materials can be supplied upon request

 

Size/Pressure produce range		Operator
Pressure	Wafer/Lug
150LB	2” up to 100”	2"~4" Lever; 5"~100" Gear
300LB	2” up to 60”	2"~4" Lever; 5"~60" Gear
600LB	On application

 

 

Triple butterfly triple offset valve specification

 

1st Offset: It is accomplished by moving the centerline of the shaft away from the seat surface.

2nd Offset: It is accomplished by moving the centerline of the shaft offset from the centerline bore of the valve.

3rd Offset: It is accomplished by adjusting the cone angle created by the 1st and 2nd offset angles at some point downstream of the valve in the center of the piping to the adjacent piping wall.

By incorporating the 3 offsets into one design eliminates any risk of friction and jamming of the disc on the seat. This increases valve life time, the driving torque is very low, in comparison with other types of valves

 

Triple offset butterfly valves specification:

 

Anti-static

Blow-out proof stem

Fire safe API 607

V type packing

Zero leakage

Ends: Wafer, Lug, Double flange.

Uni-directional/Bi-directional sealing

Operation: Lever, Gear, Electric, Pneumatic actuator

Bare shaft with ISO 5211 top mounting flange (when specified)

 

Applicable seat materials of triple offset butterfly valves

 

Metal with Graphite

Metal with PTFE

Other materials can be supplied upon request

 

Size/Pressure produce range		Operator
Pressure	Wafer/Lug/Flange
150LB	3” up to 80”	3"~4" Lever; 5"~80" Gear
300LB	3” up to 40”	3"~4" Lever; 5"~40" Gear
600LB	On application

 

Weidouli Valves Co., Ltd., is a professional butterfly valves company, we provide bidirectional butterfly valve, wsv valve, hand operated valve and etc. Want to know triple offset butterfly valve advantages, butterfly valve advantages or buy butterfly valves? Please contact us.