Pneumatic Butterfly Valve
Pneumatic Butterfly Valve Material:
| Ref | Description | Material |
| 1 | End Cap | Carbon Steel, Stainless Steel |
| 2 | Gasket | Rubber O-Ring, PTFE |
| 3 | Thrust Ring | Carbon Steel, Stainless Steel |
| 4 | Bushing | Bronze, PTFE, Stainless Steel |
| 5 | Body | Gray Cast Iron, Ductile Iron, Cast Steel, Stainless Steel |
| 6 | Seat Ring | NBR, EPDM, PTFE, VITON |
| 7 | Disc | Gray Cast Iron, Ductile Iron, Cast Steel, Stainless Steel, Aluminium Bronze |
| 8 | Shaft | 2Cr13, 1Cr18Ni9Ti, 304, 316, 316L Stainless Steel |
| Shaft Pin | 2Cr13, 1Cr18Ni9Ti, 304, 316, 316L Stainless Steel | |
| 9 | Packing or "O" ring | NBR, EPDM, PTFE, VITON |
| 10 | Packing Gland | Ductile Iron, Carbon Steel, Stainless Steel |
| 11 | Yoke | Cast Iron, Cast Steel |
| 12 | Worm Gear | Cast Iron, Ductile Iron, Carbon Steel |
| 13 | Hand Lever, Hand Wheel | Ductile Iron, Malleable Cast Iron, Carbon Steel |
Drawings and dimension of butterfly valve
| DN | NPS | H1 | H2 | H3 | ∅A | ∅B | L |
| DN50 | 2" | 75 | 129 | 32 | 125 | 105 | 43 |
| DN65 | 2.5" | 82 | 136 | 32 | 145 | 127 | 46 |
| DN80 | 3" | 99 | 153 | 32 | 160 | 145 | 46 |
| DN100 | 4" | 110 | 167 | 32 | 190.5 | 165 | 52 |
| DN125 | 5" | 125 | 193 | 32 | 216 | 200 | 56 |
| DN150 | 6" | 145 | 209 | 32 | 241.3 | 225 | 56 |
| DN200 | 8" | 170 | 251 | 40 | 298.4 | 280 | 60 |
| DN250 | 10" | 210 | 280 | 45 | 361.9 | 350 | 68 |
| DN300 | 12" | 240 | 315 | 45 | 431.8 | 400 | 78 |
| DN350 | 14" | 260 | 348 | 45 | 476.2 | 445 | 78 |
| DN400 | 16" | 295.5 | 392.5 | 52 | 540 | 510 | 102 |
| DN450 | 18" | 401.5 | 322.5 | 52 | 585 | 565 | 114 |
| DN500 | 20" | 451.5 | 362.5 | 64 | 650 | 620 | 127 |
| DN600 | 24" | 541.5 | 428.5 | 70 | 770 | 725 | 154 |
How to choose butterfly valve material
TEMPERATURE (°C) | MEDIUM AND APPLICABILITY | |||||||||||||
WATER | SEA | SALTS | STRONG BASE | WEAK BASE | STRONG ACID | WEAK ACID | GAS | ALCOHOLS | AIR | STEAM | OIL | FOOD | ||
DI | -30~350 | B | D | C | D | C | D | C | B | A | B | A | A | C |
Nylon | -30~100 | A | A | A | A | A | D | A | A | C | A | D | A | A |
AL-B | -273~232 | A | B | C | D | C | D | B | A | A | A | A | A | C |
CF8 | -268~316 | A | B | C | C | B | C | A | A | A | A | A | A | A |
A.VERY APPLICABLE B. APPLICABLE C. GENERALLY D. NOT APPLICABLE | ||||||||||||||
Advantage of factory butterfly valves
1.The product side flange complies with many national and international standards such as GB, DIN, GOST, ANSI, BS, JIS,etc.
2.Valve body procurement QT450-10 material, spheroidization rate of 3 or more, mechanical properties fully up to standard, tensile strength 450Mpa, elongation rate greater than 10%, not easy to crack, crack.
3.The valve body is solid body, the same DN weight is heavier than other manufacturers.
4.Seat rubber uses standard EPDM rubber, making the butterfly valve's resilience and tension super stable and reliable, opening and closing more than 10,000 times without leakage.
5.The valve body uses an electrostatic powder thermal spraying process with a spray thickness of 250μm. The valve body is heated at 200°C for 3 hours, and the powder is cured at 180°C for 2 hours. After natural cooling, the surface adhesion is increased by 2 times than that of the ordinary powder, making it more environmentally friendly and weatherproof. Higher, to ensure that the valve body is not discolored for 36 months.
The Casting Technology of valves
