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China Factory Suppliers GGG50 DN200 PN10 Air Release Valve - Reliable Quality with 60+ Years Experience
| 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 |
The features of exhaust air relief valve
01
Exhaust process more smoothly
Steady air release can avoid pressure surge and protect pipeline damage.
02
More autonomous working mode
The air relief valve can release air when filling water in pipe, enter air to get rid of negative pressure when vacuum or negative pressure exists.
03
More reliable way of discharge
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.
04
Automatic protection safer performance
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.
Product Parameters
TWT Exhaust air relief valve can be divided into:
- 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
Inspection and maintenance program:
- Close cut-off valve under air release valve.
- Take off the connection bolts between valve body and cover, use water to clear floating ball, body, cover, sealing ring and screen.
- The floating ball is put back in place, install the valve cover, tighten the bolts.
- Open the cut-off valve.
Installation and maintenance:
- 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.
Main Materials
| 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 |
| Connection tube | Stainless steel |
Company Profile
Certification
Our Advantages
★
More than 60 years of valve production experience with advanced processing equipment large testing laboratories and sufficient raw material reserves.
FAQ
Q1 Whether it is a factory?
A: Yes, we are valve manufacture since 1956, have more than 60 years valve production experience.
Q2 Can I have my own customized product?
A: Yes, you have customized requirements for standard, size, color, packing, nameplate, mark, etc.
Q3 Do you provide samples?
A: Yes, we can provide the samples but do not pay the charge of freight.
Q4 What's your terms of payment?
A: 30% in advance, 70% balance before shipment.
Q5 Is there any testing equipment?
A: Yes, we have pressure testing equipment, and large-scale laboratories and non-destructive testing equipment.