FOX Triple Effect Air Valve-DIN
Size range: NPS 2"~8" (DN50~DN200)
Pressure ratings: 150LB / 300LB PN16 / PN25 / PN40
Working temperature:-29°C ~ +120°C.
Suitable Medium: Oil pipelines,waterlines, clean water, irrigation,and, Non-corrosiveness
Body Material: ASTM A216 WCB ASTM A276 SS304 ASTM A276 SS316
Trim Material: A276 SS316
Seat: NBR / Viton

Three Functions Air Valve/ Combination Air Release Valve (FOX)-DIN

During pipe filling it is necessary to discharge as much air as water flows in. FOX Air Valve will make sure to perform this task allowing the release during working conditions. During operation, an air pocket is accumulated in the upper part of the valve, little by little it is compressed and its pressure arrives to water pressure, its volume increases pushing water downwards. Following Archimede's principle the float, no longer sustained by water thrust, will fall down to free the nozzle hole helping the release of the air pocket, while the upper disk will close the main orifice due to internal pressure. FOX Air Valve will avoid the air entrance thanks to a special system, composed of a spring, flat and o-ring, whose high sensitivity and accuracy allows the air discharge with a DP across the valve between 0,03 and 0,05 bar.

1.Suitable for harsh conditions: Oil pipelines, waterlines, clean water, irrigation, andNon-corrosiveness chemical pipelines, etc.
2.Anti-water hammer.
3.Maintenance can be easily performed from the top without removing the air valve from the pipe.
4.Filter can prevent external impurities into the valve body.
5.Coating suitable for highly aggressive environments(Epoxy).
6.It combines many functions in one.
7.Reduces pressure drop.
8.Floating ball is non-corrosive stainless steel A276 SS316.
9.CWP of 20, 50 and 100 bar.
10.Can be trace venting.

1.Design & Manufacture standard as to: ASME B31.3 ASME B16.34
1.Height dimension (H)  standard as to: MFR-STD
3.Flange dimension conforms as to: ASME B16.5  (150LB/300LB) BS EN 1092  (PN16/25/40)
4.Testing And Inspection as to: API 598
5.Pressure-temperature conforms as to: ASME B16.34
6.Anti Corrosion as per NACE MR-0175(2002) requirement