Large Double Flanged Butterfly Valve / Water Butterfly Control Valve

Large Double Flanged Butterfly Valve / Water Butterfly Control Valve

Double Flanged Butterfly Valve introduction:

Double Flange Butterfly Valve is operated by the disc rotating form

0° to 90°, can be applied to cut off or regulate the flow of medium.

Vitreous enamel is available upon request.

The valve can be actuated by operating lever, handle wheel, electric actuator or pneumatic actuator.

Widely used for potable water supply and distribution, electric power plant, gas supply, warm-air system,

smelting plant, chemical industry.

Double Flange Butterfly Valve Features:                  

⊙ Adjust tightness

Rubber sealing ring and disc can adjust tightness or softness of sealing with clamping ring, it insures 

best performance of adjusting the compression of sealing.

⊙ Sealing reliable

Body and disc made of ductile iron which promote the impact resistance and pressure-bearing 

capacity, sealing ring made of rubber and valve seat’s sealing surface is conical shaped, make the 

sealing capacity more reliable.

⊙ Excellent corrosion protection

Inside electrostatic epoxy resin power coating or vitreous enamel(upon request), outside electrostatic

 epoxy resin power coating.

Mail part & material 

Body, Disc: GGG50 with internal and external epoxy resin coating 

Stems: 1Cr17Ni12Mo2Ti, Stainless steel min.13%Cr 

Bushing :Bronze CuAI10Fe3

Seal ring, O-ring: NBR, EPDM or FPM 

(DN250 10inch butterfly valve)

face to face length: 10 inch valve length be 8inch(203mm).

Body Ductile Iron w/Fusion Bonded Epoxy ASTM A536 65-45-12

Disc Ductile Iron w/316SS Edge w/Fusion Bonded Epoxy ASTM A536 65-45-12

Seat NBR Vulcanized on Body (Buna-N)

Shaft Type 316 Stn. Stl ASTM A276 Ty316

Packing V-Ring NBR (Buna-N)

Flanges ANSI B 16.1 Class 125

Specifications:
 
Size: DN50 - 3000 
Temperature: -15℃ - 150℃ 
Pressure: 1.0MPa/1.6MPa 

Materials
Materials of Body :  Ductile Iron (GGG40, GGG50). Cast Iron (GG25), Stainless Steel 

Materials of Disc :  Stainless Steel. Nickel Plated, Ductile Iron, Ductile Iron Coated Plastic,

                              Titanium Steel, Copper Alloy etc

Materials of Seat :  Ethylene-Propylene-Diene Monomer (EPDM), Polytetrafluoroethylene (PTFE), 

                               Nitrile Rubber (NBR), Chloroprene, Chlorosulfonated Polyethylene (Hypalon), 

                                 Silicon, Fluoroelastomer (VITON) , Caoutchouc etc.

Materials of Stem :  Stainless Steel. Carbon Steel ,2Cr13

 
A butterfly valve is a type of flow control device, typically used to regulate a fluid flowing through a section of pipe. 
The valve is similar in operation to a ball valve. A flat circular plate is positioned in the center of the pipe. 
The plate has a rod through it connected to an actuator on the outside of the valve. Rotating the actuator turns the 
plate either parallel or perpendicular to the flow. Unlike a ball valve, the plate is always present within the flow, 
therefore a pressure drop is always induced in the flow regardless of valve position.

Standard

Design: EN 593, EN 1074-1&2; IS 13095 Double Eccentric DoubleFlanged Butterfly Valve;

Face to Face in acc. EN 558 / ISO 5752 series 14;

Flange Drilling in acc. to EN 1092-2;

Worm Gear Box with Hand Wheel;

ISO 5211 Mounting Flange standard;

Testing in acc. EN 12266-1;

Fusion Bonded Non-toxic Epoxy Powder Coating w/o NSF61/WRAS

Technical Specification

- Nominal diameter:150～2600mm        

- Nominal pressure:1.0/1.6/2.5Mpa
- Strength testing pressure:1.5/2.4/3.75Mpa

- Sealing testing pressure:1.1/1.76/2.75Mpa

Executive standard

Main external and connection dimension

1.0MPa                                                  mm

1.6MPa                                              mm