Fuel Tanker Petroleum Manhole Cover(Type4)

1. Type:Clamped type

2. Open:135°Max.opening angle of manhole cover

3. 2 auxiliary holes can be used for oil and gas recovery valve and anti overflow probe rod

Specification:

Nominal diameter:

DN500（20″）

Emergency exhaust diameter:

10″

Emergency opening pressure:

21~35KPa

Maximum emergency exhaust flow:

7000m³/h

Medium:

Dangerous chemicals

Operating temperature range:

-40℃ ~ 200℃

Operating temperature range under special working conditions:

-60℃ ~ 250℃