Suzhou Alpine Flow Control Co., Ltd
Suzhou Alpine Flow Control Co., Ltd Be The Market Leader In Water Flow Control Valve
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Stainless Steel Pilots Ductile Iron Surge anticipating Valve Nylon Reinforcement Diaphragm Anti Water Hammer
A2A5 is a surge anticipation valve and adjusted to eliminate hazardous pressure surges typical of water hammer conditions. A water hammer is caused by a sudden shutoff of a pump or rapid closure of a main valve, causing a fast propagation of low-pressure front, followed by an extremely high-pressure back-wave. A series of pressure waves, each one composed of alternating low and high pressure is created within a few seconds. A2A5 is a piloted hydraulic valve activated by line pressure. The valve has two pilots, for high and low pressure. Normally the A2A5 is closed. It opens when the line pressure drops below a preset pressure, in anticipation to the following surge, and remains open until the fluctuations
subside.
Service Fields:
For water system, irrigation system.
Technical Data:
| Size | DN50-DN800 |
| Working Temperature | - 10C- 80C |
| Flange | AISI B16.1 Or PN16 |
| Flow Media | Clean Water |
Consult Factory for other applications
IP68 for water resistance
Comply with BS EN 1074-5, ISO 5208, BS EN 12266-1, BS EN 558-1
Materials And Dimension
DN50-DN350
| No. | Part Name | Material | Standard |
| 1 | Body | Ductile Iron | GJS500-7 |
| 2 | Seat | Stainless Steel | AISI304/316 |
| 3 | O-ring | Rubber | NBR |
| 4 | O-ring | Rubber | NBR |
| 5 | Bolt | Stainless Steel | A2/A4 |
| 6 | Washer | Stainless Steel | A2/A4 |
| 7 | Bonnet | Ductile Iron | GJS500-7 |
| 8 | Bush | Bronze | C61900 |
| 9 | Spring | Stainless Steel | AISI304/316 |
| 10 | Caulking Nut | Stainless Steel | A4 |
| 11 | Diaphragm | Nylon Reinforced rubber | EPDM+Nylon Fabric |
| 12 | Fixing holder | Ductile Iron | GJS500-7 |
| 13 | Disc Holder | Ductile Iron | GJS500-7 |
| 14 | Seal | Rubber | EPDM |
| 15 | Seat Retainer | Stainless Steel | AISI304/316 |
| 16 | Stem | Stainless Steel | AISI304/316 |
| 17 | Plug | Stainless Steel | AISI304/316 |
| 18 | Screw | Stainless Steel | A2/A4 |
| 19 | Plug | Stainless Steel | A2/A4 |
| 20 | Washer | Stainless Steel | A2/A4 |
DN400-DN800