China Factory Suppliers GGG50 DN200 PN10 Air Release Valve - Over 60 Years of Experience in Valve Production
| Type | Compound Exhaust Valve |
| Certification | CE, ISO9001, BV |
| Size | DN200 |
| Coating | Epoxy |
| Design Standard | En1074-4 |
| Valve Body | Casting |
| Body Material | Ductile Iron/Wcb/Stainless Steel |
| Testing | 100% Inspections Before Leaving Factory |
| Transport Package | Export Plywood Box |
| Media | Ductile Iron |
| Big and Old Valve Factory | 65 Production History |
| OEM&ODM | Customer Request |
| Pressure | PN16 |
| Applicable Size | DN25-DN300 |
| Standard | API609/DIN3354/BS5155/En593 |
| Packing | Export Plywood Box |
| Warranty | 18 Months |
| Trademark | TWT |
Steady air release can avoid pressure surge and protect pipeline damage.
The air relief valve can release air when filling water in pipe, and enter air to get rid of negative pressure when vacuum or negative pressure exists.
Quick released air and air with water will not close valve orifice in advance and cause air seal. Orifice will close when air is released completely.
Whenever if system pressure is lower than atmosphere, water column happened, the air relief valve will open immediately and air will enter system to get rid of negative pressure. At the same time, entering air can speed up the speed of air release during air release.
- High speed compound air release valve
- Slow closing inlet and outlet air relief valve
- Size: DN25-DN300
- Pressure: PN1.0-1.6Mpa
- Temp: 0ºC-90ºC
- Main materials: cast iron, ductile iron, stainless steel
- Connection type: Thread, Flange
- Valve should be installed vertically in the pipeline highest point.
- The cut-off valve (butterfly valve or gate valve) should be installed before air release valve.
- Check and maintenance is recommended for one or two times in one year, the work can increase according to water condition.
- 1Close cut-off valve under air release valve.
- 2Take off the connection bolts between valve body and cover, use water to clear floating ball, body, cover, sealing ring and screen.
- 3The floating ball is put back in place, install the valve cover, tighten the bolts.
- 4Open the cut-off valve.
| Screen cover | SS304/SS316 |
| Screen | Stainless steel |
| Sealing | NBR/EPDM |
| Retainer | Stainless steel |
| Float ball | Stainless steel |
| Cushion | NBR/EPDM |
| Guide pin | Stainless steel |
| Body | Ductile iron/WCB/Stainless steel |
| Cover | Ductile iron |
| Gasket | NBR/EPDM |
| Leverage bracket | Stainless steel |
| Air-vent | Stainless steel/brass |
| Floating ball lever | Stainless steel |
| Connectiontube | Stainless steel |
More than 60 years of valve production experience with advanced processing equipment, large testing laboratories, and sufficient raw material reserves.