Type 14 20 inch carbon steel flange type manhole cover | |
1. Connect:Flanged 2. bolts:24 3. 135°Max 4. 2 auxiliary holes can be used for oil and gas recovery valve and anti overflow probe rod 5.Material:Stainless Steel | |
Technical Specifications: | |
Nominal diameter: | DN500 |
Emergency opening pressure: | 21~35KPa |
Medium: | Diesel and gasoline |
temperature range: | -20℃ ~ 50℃ |
Operating temperature range under special working conditions: | -40℃ ~ 70℃ |
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