Type 16 20 inch carbon steel 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 oil and gas recovery valve and anti overflow probe rod 5. Carbon steel | |
Type 16 items optional: | |
MH03T-430AG76 | Outer diameter 430mm, 1 internal breathing valve, fasten with clamp. |
MH03T-430BG76 | Outer diameter 430mm, 2 internal breathing valve, fasten with clamp. |
Technical Specifications: | |
Nominal diameter: | DN500(16″) |
Emergency exhaust diameter: | 10″ |
Emergency opening pressure: | 21~35KPa |
Maximum emergency exhaust flow: | 7000m³/h |
Medium: | Diesel and gasoline |
Operating temperature range: | -20℃ ~ 50℃ |
Operating temperature range under special working conditions: | -40℃ ~ 70℃ |
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