Large Air Exhausting Sewage Combination Air Release Valve Spill Free Triple Function

Description:

AFC's sewage air release valve conforms to International standard EN1074-4 and AWWA C515.
Compared with other plant air valve, ours have not only large air exhausting and large air intake under invacuum,but also one more function of small air releasing. As we know normally there is 2% air in water system,our av does not stop small air venting untill all air in valve is completely released while the top seal arc in closed status.

All internal accessories are of AISI SS316, hardness and quality are quaranteed.

There is a seal gasket in the valve above big float and it helps orifice make better sealing effect. With rubber seal gasket above float, it can absorb water hammar to avoid crash with seal arc and valve body and protect air valve from hurting.

Functions:

Combination kinetic air release valve provide 3 functions:

1. Large air release

1-1. During filling the pipeline, float will stay at its original position. (open)

1-2. Let large air out of valve thru big nozzle.

2. Small air release

2-1.When the water level comes up to the top, float will be up to its close position and close the sealing arc- big orifice and small orifice.

2-2.The air (2% of solved air in water ) are continuously coming out from water and gather at the top of the valve.

2-3.The float will be driven down and let small pocket out thru small orifice.

2-4.The sealing arc will still be in close position until empty of water

3. Large air intake during draining of the pipeline.

3-1.Float will drop down when empty of pipeline.

3-2.Large air will come into the pipeline thru valve.

3-3.Preventing from collapse of pipeline and break vacuum.

3-4.Protect the sealing o-ring from clogging in the pipeline.

Features:

. Spill Free.

. Drain boss at the top & bottom for cleaning.

. No arms or levers to prevent vibrating, bending, direct closure of the fl oat.
. Fully fusion epoxy coated inside and outside of valve body for long term services.
. Manufacturing standard : BS EN1074-4, AWWA C512
. Flange drilling and dimension : BS EN 1092 and BS EN 558 and ANSI flange.

Service Fields:

For sewage water system.

Technical Data:

Size range: DN 50-200MM
Pressure ratings:1.0Mpa,1.6Mp (Flange)
Working temperature: -10°-80°C.
Flow media: sewage water.
Please consult factory for PN25 and antishock device whenever there is waterhammer issue.

Material:

Dimension: