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Weidouli Valves Co.,Ltd.
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Butterfly Valves

Butterfly valves 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 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 Details Of Butterfly Valves

The Drawing Of Butterfly Valves

Drawing Of Butterfly Valves
Drawing Of Butterfly Valves
Drawing Of Butterfly Valves

Types Of 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 offset butterfly valves 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



Product Inquiry
Tel:
0086-577-86921659
Add:
No.20, Xingyu Road, Airport Industrial Zone, Wenzhou city, 325024 P.R.
No.20, Xingyu Road, Airport Industrial Zone, Wenzhou city, 325024 P.R.
sale@weidouli.com
0086-577-86921659