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
| Design standard | DIN3354 |
| Face to face | DIN3202 or BS 5155 |
| Flange end | DIN 2501 |
| Test & inspection | DIN 3230 or GB/T 13927 |
| Working temperature | NBR<80℃; EPDM<120℃; FPM<160℃ |
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
NO | Part name | Material |
1 | Body | SS304 |
2 | Gear box | Assembly |
3 | Disc | SS304 |
4 | Stem | SS416 |
5 | Seal ring | 316+Graphite |
6 | packing | Graphite |
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:
malfunction | whys | solution |
Seal leak | 1, Some rubbish on the seal 2, Seal have been light damage | ① Clean the rubbish. ② Replacing the disc |
Stem Packing leak | 1, packing be damaged 2, packing lapse | ① Tighten the gland nut ② Change the packing |
flange leak | 1, the nut release 2, gasket lapse | 1 . Tighten the nut 2. Change the gasket |
Maintenance
Open the worm box cover and add some butter per two months.
Check the seal, packing and flange, if leak, please maintain ASAP.
