20 Inch Cast Iron Hooped Type Manhole Cover

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US $120-140 / Sets | 1 Set/Sets (Min. Order)
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Quick Details
Place of Origin:
Zhejiang, China (Mainland)
Brand Name:
Model Number:
Oil Tank Truck
Max emergency flow rate:
7000 m3/h
installment mode:
hooped type
temperature range:
-20 °c-- +70 °c(when 34kpa)
Packaging & Delivery
Packaging Details
box 2 sets/ctn 58*58*40 G.W.: 44kgs
Ningbo & Shanghai
Lead Time :
7 days
Product Description

Manhole Cover (C801TB-460/500)

Manhole Cover is installed on the top of the tanker to prevent the inside fuel from leakage when the tanker is over rolled. With P/V vent inside to adjust the pressure.When there is pressure differences inside and outside the tanker ,it will automatically inlet or exhaust air to adjust the pressure so that it can ensure the safety and environment protection.It is suitable to transpore petroleum ,diesel,kerosene,and other light fuel。

Technical Data
Nominal diameter
Emergency open pressure
Max emergency flow rate
7000m³/h(when 34KPa)
Carbon steel
Installment mode
Hooped  type
Temperature range

Feature & Benefit

1)Emergency Exhausting Device
when the tanker truck is in high temperature condition, manhole will automatically exhaust the air inside to release the pressure,ensuring the safety of the tanker.
2) With P/V Vent inside
When there is pressure difference inside and outside of the tanker,it will automatically inlet or outlet air to adjust the pressure so that it can ensure the safety and environmental protection.
3) Secondary Open Design
When open the up binder plate ,it will release the pressure out to prevent the operator against dangerous Kick-Back that can experience due to build up of residual pressure.

4)Blinding Hole Design

The blinding holes can be produced according to use's demand,to install with Vapor Vent Valve,Optic Sensor,Pressure gauge,Dip Tube or External Vacuum Valve according to user's demand.

5)Big plate is used the plate to punch forming.The material of big plate and dimension can be produced according to user's demand.Can be installed double P/V vent valve according to requirement to increase the flow rate of air.

Detailed Images

Machine Parts

Name: P/V Vent Valve 

Machine Parts

Name: Secondary Open Device

Machine Parts

Name: Hoop

Machine Parts

Name: Base

Our Service


We are the Road Dangerous Transportation Standard drafter,also is appointed supplier of China Petroleum,Sinopec China,CIMC etc.


We have been exporting all of the goods to USA,South America,Africa,Middle-East,European Countries including more than 50 countries and area over the word.

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