Manhole cover: It consists of large cover, small cover, upper pressure plate, lower pressure plate, built-in breathing valve, etc.
The manhole cover is equipped with auxiliary holes, which can be installed with oil and gas Recycle valves, Prevent overflow probe, oil measuring holes and external breathing valves.
1. Each manhole cover emergency exhausting valve includes a breathing valve.
2. The breathing valve is installed as required to make the tanker ventilated.
3. Different pressure settings suit different operation requirements.
4. Emergency exhausting valve and breathing valve has automatic sealing to prevent danger and needless oil spillage.
5. Double open allows safe release of remaining gas before fully opening the cover board.
6. Two reserved blind holes on the main cover can be installed with vapor recovery valve and optic sensor.
Nearly 100sets of the testing equipment has been invested to ensure that each part meets the technical requirements and focus on the quality of each product.
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