20 Inch Stainless Steel Manhole Cover Characteristic: | |
Connect:flanged 24 Bolts Open:135°Max.opening angle of manhole cover Auxiliary Holes:3 auxiliary holes can be used for oil and gas recovery valve, anti overflow probe rod, oil measuring hole or external breathing valve Material:304 stainless steel. Weight:65kpa | |
2 items optional: | |
Item No. | Product Description |
MH03B-560AF | Outer diameter 560mm, 1 Internal breathing valve, fluororubber seal |
MH03B-560AV | Outer diameter 560mm, 1 Internal breathing valve, fluororubber seal |
MH03B-580AF | Outer diameter 580mm, 1 Internal breathing valve, fluororubber seal |
MH03B-580AV | Outer diameter 580mm, 1 Internal breathing valve, fluororubber seal |
MH03B-580EF | Outer diameter 580mm, 1 Internal and external breathing valve, fluororubber seal |
MH03B-580EV | Outer diameter 580mm, 1 Internal and external breathing valve, fluororubber seal |
Specifications: | |
Nominal diameter | DN500(20″) |
Emergency exhaust diameter | 10″ |
Emergency opening pressure | 21~35KPa |
Maximum emergency exhaust flow | 7000m³/h |
Medium | Dangerous chemicals |
Temperature range | -40℃ ~ 200℃ |
Temperature range under special working conditions | -60℃ ~ 250℃ |
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