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Why are Y type bellows seal globe valve less popular than normal bellow seal globe valve？
1, They are all bellow seal globe valves，they are all have double seals (bellows +padding), normal globe valve only have padding seal. But their body design is different, Y type bellow seal globe valve body more better for flow control. It has no flow loss，but a little expensive than normal bellow seal globe valve.
2, Disc with scraping effect, so it has a longer service life.
3, The inside seals bellows are all made by stainless steel 321, which is more corrosion resistant and have a longer service life.
4, bellow seal globe valves are lighter than normal globe valve in open and off.
Technical specification
Face to face :DIN3202
Flange ends: DIN2543-2546
Design standard: DIN
Test& inspection: DIN3230
Advantage
Why are Y type bellows seal globe valve less popular than normal bellow seal globe valve？
1, They are all bellow seal globe valves，they are all have double seals (bellows +padding), normal globe valve only have padding seal. But their body design is different, Y type bellow seal globe valve body more better for flow control. It has no flow loss，but a little expensive than normal bellow seal globe valve.
2, Disc with scraping effect, so it has a longer service life.
3, The inside seals bellows are all made by stainless steel 321, which is more corrosion resistant and have a longer service life.
4, bellow seal globe valves are lighter than normal globe valve in open and off.
Technical specification
Face to face :DIN3202
Flange ends: DIN2543-2546
Design standard: DIN
Test& inspection: DIN3230
| Nominal Pressure | PN | ||
| Pressure test | Strength test | 1.4PN | MPa |
| Sealing test | 1.0PN | ||
| Gas seal test | 0.5 | ||
| — | — | ||
| Temputer | -20℃~425℃ | ||
Main Material(mostly) it can OEM
| NO. | Part name | Material |
| 1 | Body | 1.4401、SS321,SS304 |
| 2 | Seat | 1.4301、Stl |
| 3 | Disc | 2Cr13、Stl、507L |
| 4 | Pin | 2Cr13 |
| 5 | Bellows | SS321、SS316 ETC |
| 6 | Stem | 1.4401、2Cr13 |
| 7 | Gasket | Flexible graphite + stainless steel |
| 8 | Cover | GS-C25、、1.4401、SS321,SS304 |
| 9 | Nut | ASTM 194-2H、A194-8 |
| 10 | Double-headed bolt | ASTM 194-B7、A193-B8 |
| 11 | Packing | BY Ply-wooden case |
| 12 | Gland | GS-C25、1.4301、1.4401 |
| 13 | Locator | 1C25 |
| 14 | Stem nut | Copper alloy、D2、BL2 |
| 15 | Hand wheel | KTH330-08 |
| 16 | Cap | 1C45 |
Connection Size (DN15-DN350)
| PN 16 | |||||||
| DN | Main connection size | ||||||
| L | D | D1 | D2 | b | f | n-Φd | |
| 15 | 130 | 95 | 65 | 45 | 16 | 2 | 4-Φ14 |
| 20 | 150 | 105 | 75 | 58 | 18 | 2 | 4-Φ14 |
| 25 | 160 | 115 | 85 | 68 | 18 | 2 | 4-Φ14 |
| 32 | 180 | 140 | 100 | 78 | 18 | 2 | 4-Φ18 |
| 40 | 200 | 150 | 110 | 88 | 18 | 3 | 4-Φ18 |
| 50 | 230 | 165 | 125 | 102 | 20 | 3 | 4-Φ18 |
| 65 | 290 | 185 | 145 | 122 | 22 | 3 | 4-Φ18 |
| 80 | 310 | 200 | 160 | 138 | 24 | 3 | 8-Φ18 |
| 100 | 350 | 235 | 180 | 158 | 24 | 3 | 8-Φ18 |
| 125 | 400 | 250 | 210 | 188 | 26 | 3 | 8-Φ18 |
| 150 | 480 | 285 | 240 | 212 | 28 | 3 | 8-Φ22 |
| 200 | 600 | 340 | 295 | 268 | 34 | 3 | 12-Φ22 |
| 250 | 650 | 405 | 355 | 320 | 33 | 3 | 12-Φ25 |
| 300 | 750 | 460 | 410 | 375 | 33 | 4 | 12-Φ25 |
| 350 | 850 | 520 | 470 | 435 | 34 | 4 | 16-Φ25 |
| PN 25 | |||||||
| 15 | 130 | 95 | 65 | 45 | 16 | 2 | 4-Φ14 |
| 20 | 150 | 105 | 75 | 58 | 18 | 2 | 4-Φ14 |
| 25 | 160 | 115 | 85 | 68 | 18 | 2 | 4-Φ14 |
| 32 | 180 | 140 | 100 | 78 | 18 | 2 | 4-Φ18 |
| 40 | 200 | 150 | 110 | 88 | 18 | 3 | 4-Φ18 |
| 50 | 230 | 165 | 125 | 102 | 20 | 3 | 4-Φ18 |
| 65 | 290 | 185 | 145 | 122 | 22 | 3 | 8-Φ18 |
| 80 | 310 | 200 | 160 | 138 | 24 | 3 | 8-Φ18 |
| 100 | 350 | 235 | 190 | 162 | 24 | 3 | 8-Φ22 |
| 125 | 400 | 270 | 220 | 188 | 26 | 3 | 8-Φ26 |
| 150 | 480 | 285 | 240 | 212 | 28 | 3 | 8-Φ26 |
| 200 | 600 | 340 | 310 | 278 | 30 | 3 | 12-Φ26 |
| 250 | 650 | 405 | 355 | 335 | 32 | 3 | 12-Φ30 |
| 300 | 750 | 460 | 410 | 375 | 34 | 4 | 16-Φ30 |
| 350 | 850 | 520 | 470 | 435 | 34 | 4 | 16-Φ33 |
| PN 40 | |||||||
| 15 | 130 | 95 | 65 | 45 | 16 | 2 | 4-Φ14 |
| 20 | 150 | 105 | 75 | 58 | 18 | 2 | 4-Φ14 |
| 25 | 160 | 115 | 85 | 68 | 18 | 2 | 4-Φ14 |
| 32 | 160 | 140 | 100 | 68 | 18 | 2 | 4-Φ18 |
| 40 | 180 | 150 | 110 | 78 | 18 | 3 | 4-Φ18 |
| 50 | 230 | 165 | 125 | 102 | 20 | 3 | 4-Φ18 |
| 65 | 290 | 185 | 145 | 122 | 22 | 3 | 8-Φ18 |
| 80 | 310 | 200 | 160 | 138 | 24 | 3 | 8-Φ18 |
| 100 | 350 | 235 | 190 | 162 | 24 | 3 | 8-Φ22 |
| 125 | 400 | 270 | 220 | 188 | 26 | 3 | 8-Φ26 |
| 150 | 480 | 300 | 250 | 218 | 28 | 3 | 8-Φ26 |
| 200 | 600 | 340 | 310 | 278 | 34 | 3 | 12-Φ30 |
