Parts
| Parts Name | Material | Standard | Grade |
| Body | Ductile iron | BS 2789 | 500/7 |
| Diaphragm | Synthetic Rubber | BS 2494 | EPDM |
| Spring Seat | Stainless steel | BS 970 | 304S31 |
| Spring | Carbon Steel | ||
| Cover | Ductile Iron | BS 2789 | 500/7 |
| Flat Washer | Carbon Steel | BS 1769 | A3 |
| Hex Bolt | Carbon Steel | BS 1769 | A3 |
Dimensions
| DN | A | B | C | D | E |
| 50/65 | 280 | 190 | 180 | 98 | 190 |
| 80/100 | 330 | 205 | 190 | 108 | 202 |
| 125 | 400 | 230 | 215 | 125 | 250 |
| 150 | 400 | 230 | 215 | 140 | 250 |
| 200 | 508 | 255 | 240 | 168 | 280 |
| 250 | 650 | 320 | 290 | 203 | 341 |
| 300 | 760 | 380 | 360 | 230 | 390 |
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