Flanged Butt Weld Butterfly Valve , Double Eccentric Lug Type
Butterfly Valve
Butterfly Valve FEATURES
- Metal seated, good seal
- Low weight
- Low flow resistance
- Small operation torque
Butterfly Valve Characteristics:
It is simple structure : good interchangeability and low price
Stem sealing is not easy deformation ,so avoids leakage phenomenon.
Overall support is good ,stable and solid
Use less rubber of seat ,so expansion has sm
- all impaction and easy to control torque value at an appropriate
range .`
- Applying to two pieces of no-sells connection ,structure is simple
and convenient to be maintained
- Butterfly disc owns automatic alignment function and achieved small combination of disc and seat .
- Phenolic back seat is featured such as no loss ,tensile ,anti-leak
,convenient replacement etc.
- For seat sealing surface and phenolic back as a whole ,it can
reduce amount of deformation .
Butterfly Valve Specification
| name | Flanged Butt Weld Butterfly Valve , Double Eccentric Lug Type
Butterfly Valve |
| Item No | D373H-10K |
| DN(mm) | DN50~DN3000 |
| pressure(Mpa) | 1.0 |
Test pressure (Mpa) | Seal test | 1.1 |
| Body test | 1.5 |
| temperature | ≤350℃ |
| medium | Water, sewage, sea water, hot water etc., |
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
| 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 |
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:
| 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 |
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
DN
(mm) | PN
(MPa) | Connection dimensions(mm) |
| L | D | D1 | Zφd |
|
| 40 | 1.0/1.6 | 43 | 145 | 110 | 4-18 |
| 50 | 43 | 165 | 125 | 4-18 |
| 65 | 46 | 185 | 145 | 4-18 |
| 80 | 46 | 200 | 160 | 4-18/8-18 |
| 100 | 52 | 220 | 180 | 8-18 |
| 125 | 56 | 250 | 210 | 8-18 |
| 150 | 56 | 285 | 240 | 8-22 |
| 200 | 60 | 340 | 295 | 8-22/12-22 |
| 250 | 68 | 395/405 | 350/355 | 12-22 |
| 300 | 78 | 445/460 | 400/410 | 12-22 |
| 350 | 1.0 | 78 | 505 | 460 | 16-22 |
| 400 | 102 | 565 | 515 | 16-26 |
| 450 | 114 | 615 | 565 | 20-26 |
| 500 | 127 | 670 | 620 | 20-26 |
| 600 | 154 | 780 | 725 | 20-30 |
| 700 | 165 | 895 | 840 | 24-30 |
| 800 | 190 | 1015 | 950 | 24-33 |
| 900 | 203 | 1115 | 1050 | 28-33 |
| 1000 | 216 | 1230 | 1160 | 28-39 |
| 1200 | 254 | 1455 | 1380 | 32-39 |
| 1200 | 0.6/0.25 | 254 | 1400/1375 | 1340/1320 | 32-34/32-30 |
| 1400 | 279 | 1620/1575 | 1560/1620 | 36-34/36-30 |
| 1600 | 318 | 1820/1785 | 1760/1730 | 40-34/40-30 |
| 1800 | 356 | 2045/1985 | 1970/1930 | 44-41/44-30 |
| 2000 | 406 | 2265/2185 | 2180/2130 | 48-48/48-30 |
