tank manhole cover standard manhole cover size stainless steel manhole cover for sale

The manhole cover installed on the tank top,used for filling oils,the entrance of intemal tank for examination and maintenance.in the event of an emergency,to ensure the safety of the truck.

Nomally,the breathing valve is closed,but when loading/unloading the oil,and the temperature,the pressure inside the tank will be changed. At this time,the breathing valve will automatically open to exhaust / inspiration to maintain within the pressure in the tank within the specified pressure range.

When emergency situaions happen,such as fire accaidents,pressure of the tank to avoid the occurrence of release the intemal 0.254Mpa,accord with the EN13317:2002 European standards,in line with the national standard NTTC,in line with the international tanker transport standard DOT406.GB18564.1.

Our products are widely accepted in the world,By the national oil companies think of dangerous goods transport with safety auxiliary equipment.

SPECIFICATION:

1.Whole diameter: 20"

2.Nominal diameter:10"

3.Emergency open pressure: 21kpa -32kpa

4.Material: Aluminum Alloy

1. Tank Truck Manhole Cover

Jialong 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 the other light fuel,etc.

2. Benefit & Feature

* Emergency Exhausting Design

when the tanker truck is in high temperature condition,the manhole will automatically exhaust the air inside to release the pressure,ensuring the safety of the tanker.

* With P/V Vent inside

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 environmental preotection.

* Secondary Open Design

When open the up binder plate ,it will release the pressure out to prevent the workers from pushing over.

* Blinding Holes Design

In the main plate of the Manhole ,there are three blinding holes can be installed with Vapor Vent Valve,Optic Sensor,Dip Tube or Exernal Vacuum Valve according to the user's demand.

1.Q:Are you manufacturer or trading company?

A:We have our own 2 factories to produce 80% products by ourselves ,including fuel dispenser,fuel nozzle,fuel pump, camlock coupling ,measuring can, jerry can,valve,pipe fitting,flowmeter etc,rest 20% we purchase from our boss's relatives,friends to make sure get cheapest price and these factories working with us over 10 years.
2.Q:What you can supply to me?
A:We could supply all kinds of Fuel dispenser and fuel dispenser parts, Besides ,we provide OEM service, shipping service and QC service as well to make sure you get ONE-STOP purchase process from us. 
3.Q:Can you customize the products as per our request?
A: Yes, we do OEM and ODM. We could make the product suggestion based on your idea and budget.
4.Q:How to get a sample from you?
A: All samples will be free if unit cost under 20USD,but the freight should be on your side. If you have express account like DHL,UPS etc we will send you directly, if you don't have you can send express cost to our Paypal account, any sample cost could be returned when you make order.
5.Q: What's your payment term?
A: Payment: 30% in advance, 70% after receiving the B/L.We also accept L/C ,D/P if total amount over $30000.