1. Brief Introduce Cast Iron Air Relief Valve
The exhaust valve is used in independent heating system, central heating system, heating boiler, central air conditioning, floor heating and solar heating system. As there is usually air dissolved in water, and the air solubility decreases with increasing temperature, so the water cycle process gas gradually separated from the water, and gradually come together to form large bubbles or column, because of water added, so often gases. The exhaust valve is divided into heating type, micro type, fast type, compound type, etc..
Exhaust valve is an essential auxiliary component in the pipeline system, which is widely used in boilers, oil and gas, water supply and drainage pipeline. Often installed in the high ground or elbow, etc., to exclude excess gas pipeline, improve the efficiency of the use of pipe road and reduce energy consumption. HVAC system and HVAC system in the operation process, release of water in the heating gas (such as hydrogen and oxygen) many adverse effects will damage the system and reduce the thermal effect of these gases, such as not timely drain will have many adverse consequences. Such as: corrosion caused by oxidation; the formation of air pockets in the radiator; hot water circulation is not smooth and unbalanced, so that some of the local heat radiator is not hot; pipeline with the noise of the operation of the gas; circulation pump vortex phenomenon.
2. The Parameters of Cast Iron Air Relief Valve
| Model |
2W160-10 |
2W160-15 |
2W200-20 |
2W250-25 |
2W350-35 |
2W400-40 |
2W500-50 |
| Working Medium |
Air, Water, Oil, Gas |
| Motion Pattern |
Direct Drive Type |
| Type |
Normal Close Type |
| Aperture of Flow Rate mm |
16 |
|
20 |
25 |
35 |
40 |
50 |
| CV Value |
4.8 |
|
7.6 |
12 |
24 |
29 |
48 |
| Joint Pipe Bore |
3/8″ |
1/2″ |
3/4″ |
1″ |
1 1 /4″ |
1 1 /2″ |
2″ |
| Operation Fluid Viscosity |
Below 20CST |
| Working -pressure |
Air: 0~1.0Mpa. Water: 0~0.1Mpa. Oil: 0~0.1Mpa |
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| Max. Pressure Resistance |
1.0Mpa |
| Operating Temperature |
-5~80 degree |
| Voltage Range |
±10% |
| Material of Body |
Brass |
| Material of Oil Seal |
NBR or VITON |
Audited Supplier 
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