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Type 10 20 inch aluminum flange type manhole cover | |
1. Flanged 2. 24 bolts 3. 135°Max.opening angle of manhole cover 4. 2 auxiliary holes can be used for anti overflow rod and threaded oil and gas recovery valve | |
Type 10 items optional: | |
MH03-560Ab | Outer diameter 560mm, 1 internal breathing valve |
MH03-560Bb | Outer diameter 560mm, 2 internal breathing valve |
MH03-580Ab | Outer diameter 580mm, 1 internal breathing valve |
MH03-580Bb | Outer diameter 580mm, 2 internal breathing valve |
Technical Specifications: | |
Nominal diameter: | DN500（20″） |
Emergency exhaust diameter: | 14″（350mm） |
Emergency opening pressure: | 21~35KPa |
Maximum emergency exhaust flow: | 10000m³/h |
Medium: | Diesel and gasoline |
Operating temperature range: | -20℃ ~ 50℃ |
Operating temperature range under special working conditions: | -40℃ ~ 70℃ |
Function&Feature
1.Big plate is used of steel plate to punch forming,the material of big plate anddimension can be produced according to used's demand.
2.The position of small plate and dimension can be according to user's demand.
3.Can be installed double P/V vent valve according to requirement.
4.As usual,big plate have two blinding hole,it can be installed vapor adaptor valve and optic sensor.
