Flanged Butt Weld Butterfly Valve , Double Eccentric Lug Type Butterfly Valve

Flanged Butt Weld Butterfly Valve , Double Eccentric Lug Type Butterfly Valve

Butterfly Valve Characteristics:

l It is simple structure : good interchangeability and low price

l Stem sealing is not easy deformation ,so avoids leakage phenomenon.

l Overall support is good ,stable and solid

l Use less rubber of seat ,so expansion has small impaction and easy to control torque value at an appropriate range .`

l Applying to two pieces of no-sells connection ,structure is simple and

convenient to be maintained

l Butterfly disc owns automatic alignment function and achieved small

combination of disc and seat .

l Phenolic back seat is featured such as no loss ,tensile ,anti-leak ,convenient replacement etc.

l For seat sealing surface and phenolic back as a whole ,it can reduce amount of deformation .

Butterfly Valve Specification

Butterfly Valve FEATURES 

⊙ Metal seated, good seal 

⊙ Low weight                    

⊙ Low flow resistance

⊙ Small operation torque

Butterfly Valve APPLICABLE STANDARDS 

1.  Design according : API 609

2.  Test standard according: JIS B2003

3.  Connect flange standard according: JIS B2212

5. Item Name of part Material Spec 

6.  Operation:

6.1.  The two pipe flange should be smooth.

6.2.  Put the butterfly valve in the pipe line, fixed the orientation hole first.

7.  Delivery:

When delivery or store the butterfly valve, should keep in dry and cool environment.

8. Note:

8.1.  Pipe flange should same as the butterfly valve flange. 

8.2.  Check the valve before installed, the environment should correspond to the butterfly valve 

         specification.

8.3.  Before open butterfly valve, checking the disc without dirt.

8.4. The disc must be shut off place when installed.

8.5. Adjusting the pipe connect before installed.

8.6. The connect flange should be parallel.

8.7. After installed, the pressure test disc should be open place.

8.8. If the butterfly can not natural open or close, please kindly check it careful, can not strike, tamp or 

       use extension lever.

8.9.  When maintenance or operation, must check the stem, lever, gear box or actuator have correctly 

        connect. Otherwise the stem will be push by pipe pressure.

9.   The malfunction and resolving:

10. Maintenance

Open the worm box cover and add some butter per two months.

Check the seal, packing and flange, if leak, please maintain ASAP.

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

Wafer Rubber Seated Butterfly Valves