PVDF is the combination air valve has the characteristics of both an Air Release Valve and vacuum valve. In pressurized pipe systems, an automatic air pass valve is essential.
It will gradually rise upwards and accumulate at the highest points of the system. Pump breakdown, incorrect instrumentation measurements, malfunctions, flow problems, and water spurts or pressure spikes can all be caused by trapped air. Air in the tube also makes the pump work harder, which uses more power.
The purpose of a PVDF Air Release Valve, also known as an air relief valve, is to relieve trapped air that collects at each maximum height of a full pressurized tube. As the internal lever system increases the temp force to exceed the internal pressure, an air release valve may open against the internal pressure.
When gas bubbles form in the valve, the greater force opens the opening. PVDF Air Release Valves are critical to pipeline productivity and protection against water ingress.
The purpose of the VA air release is to eliminate any air entering the pipe with the liquid.
• Connection system for solvent weld and threaded joints
• No metal parts in contact with the fluid
• Can be used as a vacuum breaker valve when installed with the nut at the
bottom
• Valve material compatibility (PVC-U) with water, drinking water and other
food substance conveyance according to current regulations
• Can be maintained with the valve body installed
| Technical specifications | |
|---|---|
| Construction | Air release valve |
| Size range | DN 15 ÷ 50 |
| Nominal pressure | PN 16 with water at 20 °C |
| Temperature range | 0 °C ÷ 60 °C |
| Coupling standards | Solvent welding: EN ISO 1452, EN ISO 15493, BS 4346-1, DIN 8063, NF T54-028. Can be coupled to pipes according to EN ISO 1452, EN ISO 15493, DIN 8062, NF T54-016. Thread: ISO 228-1, DIN 2999. |
| Reference standards | Construction criteria: EN ISO 16137 EN ISO 1452, EN ISO 15493 Test methods and requirements: ISO 9393 Installation criteria: DVS 2204, DVS 2221, UNI 11242 |
| Valve material | PVC-U |
| Seal material | EPDM |
For water and non-hazardous fluids with regard to which the material is classified as CHEMICALLY RESIS-TANT. In other cases, a reduction of the nominal pressure PN is required(25 years with safety factor).
Air release valve with male ends for solvent welding, metric series
| d | DN | PN | E | H | L | L1 | Z | g | Code |
|---|---|---|---|---|---|---|---|---|---|
| 20 | 15 | 16 | 55 | 103 | 16 | 18 | 87 | 105 | VAIV020E |
| 25 | 20 | 16 | 66 | 125 | 19 | 20 | 106 | 185 | VAIV025E |
| 32 | 25 | 16 | 75 | 150 | 22 | 24 | 128 | 280 | VAIV032E |
| 40 | 32 | 16 | 87 | 171 | 26 | 28 | 145 | 415 | VAIV040E |
| 50 | 40 | 16 | 100 | 187 | 31 | 34 | 156 | 570 | VAIV050E |
| 63 | 50 | 16 | 122 | 223 | 38 | 41 | 185 | 950 | VAIV063E |
Air release valve with BSP threaded female ends
| R | DN | PN | E | H | L | Z | g | Code |
|---|---|---|---|---|---|---|---|---|
| 1/2” | 15 | 16 | 55 | 124 | 15 | 94 | 120 | VAFV012E |
| 3/4” | 20 | 16 | 66 | 149 | 16,3 | 116,4 | 205 | VAFV034E |
| 1” | 25 | 16 | 75 | 175 | 19,1 | 136,8 | 360 | VAFV100E |
| 1” 1/4 | 32 | 16 | 87 | 200 | 21,4 | 157,2 | 475 | VAFV114E |
| 1” 1/2 | 40 | 16 | 100 | 209 | 21,4 | 166,2 | 670 | VAFV112E |
| 2” | 50 | 16 | 122 | 248 | 25,7 | 196,6 | 1130 | VAFV200E |
