Flanged Center Line Butterfly Valve , Ductile Iron Butterfly Valve​

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

Butterfly Valve Advantage

•High Flow Capacity

•Low Pressure Drop

•Economical Alternative to Metal Butterfly Valves

•Easy to operate: Lever Type, low torque. •Connection style: with flange or wafer in standard

•Quality guarantee:100% factory tested no leak.

•Comfortable handle design Aldali and Acid resisitant

•Square shaft, easy to mount actuator

Butterfly Valve Application

Fresh water, sewage, sea water, air, vapor, food, medicine, oils, alkalis, salt etc.

⊙ 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.

⊙ Reliable health nature

Epoxy resin power is up to the health standard.

1. BRIEF INTRODUCTION:

The butterfly valve is operated by the disc rotating form 0° to 90°, can be applied to cut off or regulate

the flow of medium.

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

Widely used for potable water supply, waste water treatment, electric power plant, gas supply,

warm-air system, smelting plant, ship building, textile, petroleum, chemistry, or other light industries.

FEATURES

⊙ EPDM seated, good seal

⊙ Low weight

⊙ Low flow resistance

⊙ Small operation torque

⊙ Easy to install and maintain

⊙ Open-close 90° more smoothly

APPLICABLE STANDARDS

1. Design according : API 609

2. Test standard according: JIS B2003

3. Connect flange standard according: JIS B2212

4. Face to face standard according: JIS B2002

Item Name of part Material Spec

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.

Delivery:

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

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.

The malfunction and resolving:

Maintenance

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

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