General of Butterfly valve
Butterfly valve is a type of valve which can be used in a variety of chemical services. They are available with small dimensions allowing for use in areas where space is limited, and they allow a high coefficient of flow. A butterfly valve is composed of body, soft seat or hard seat, disc, stem, packing, notched position plate, and a lever or gear. The seat is under compression when it is mounted in the valve body, thus making a seal around the periphery of the disc both upper and lower points where the stem passes through the seat. Packing is provided forming a positive seal around the stem for added protection in case the seal formed by the seat could become damaged.
Wafer Soft Seat Butterfly Valve
Product Description
Size: DN25-DN1200
Body: Cast Iron, Ductile Iron
Disc: Stainless Steel, Cast Iron, Ductile Iron
Seat: PTFE, BNR, EPDM, VITON
Stem: Stainless Steel 304/316/416
Packing: Soft graphite
Hand Lever/Gear: Cast Iron or Ductile Iron
Woking pressure: PN10, PN16
Top Flange: ISO 5211
Flange drilling standard: BS4504, ANSI B16.5, JIS, DIN2501
Surface: Electric Fussion Epoxy Powder Coated.
|
Nominal diameter |
DN(mm) |
50-700 |
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|
Nominal pressure |
PN(MPa) |
0.6 |
1.0 |
1.6 |
2.5 |
4.0 |
|
Ps(MPa) |
lntensity Test |
0.9 |
1.5 |
2.4 |
3.75 |
6.0 |
|
Seal test |
0.66 |
1.1 |
1_76 |
2.75 |
4.4 |
|
|
Air Test |
0.6 |
0.6 |
0.6 |
0.6 |
0.6 |
|
|
applicable Medium |
Water, steam, oil products, corrosive acid, etc. |
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|
Applicable Temperature |
Carbon steel: -29-425 Stainless steel: 40-600 |
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Material of Main Parts
|
|
Material |
|
Body |
Cast steel, stainless steel, Cr-Mo steel, special material |
|
Disc |
Cast steel, alloy steel(Cr plated), stainless steel, Cr-Mo steel, special material |
|
Seal ring |
Stainless steel, anti-wearing material |
|
Stem |
2Crl3, 1Crl3Stainless steel, Cr-Mo steel |
|
Packing |
Flexible graphite |
Main connection dimension
|
DN |
Main outline dimension |
1.0MPa |
1.6MPa |
2.5MPa |
|||||||
|
L |
H |
H0 |
A |
B |
D0 |
n-d |
D0 |
n-d |
D0 |
n-d |
|
|
50 |
43 |
63 |
235 |
270 |
110 |
110 |
4-14 |
125 |
4-18 |
125 |
4-18 |
|
65 |
46 |
70 |
250 |
270 |
110 |
130 |
4-14 |
145 |
4-18 |
145 |
4-18 |
|
80 |
46 |
83 |
275 |
270 |
110 |
150 |
4-18 |
160 |
8-18 |
160 |
8-18 |
|
100 |
52 |
105 |
316 |
270 |
110 |
170 |
4-18 |
180 |
8-18 |
180 |
8-18 |
|
125 |
56 |
115 |
340 |
310 |
110 |
200 |
8-18 |
210 |
8-18 |
210 |
8-18 |
|
150 |
56 |
137 |
376 |
310 |
110 |
225 |
8-18 |
240 |
8-22 |
240 |
8-22 |
|
200 |
60 |
164 |
430 |
353 |
150 |
280 |
8-18 |
295 |
8-22 |
295 |
12-22 |
|
250 |
68 |
206 |
499 |
353 |
150 |
335 |
12-18 |
350 |
12-22 |
355 |
12-26 |
|
300 |
78 |
230 |
570 |
380 |
150 |
395 |
12-22 |
400 |
12-22 |
410 |
12-26 |