∅900mm(36") D400_900mm round manhole covers、Seal manhole covers and frames

Product structure size (mm)	Manhole cover Depth	Manhole cover Dia	Manhole Frame Height	Load Ratings
	50	980	100	D400
	Manhole Frame Outer Dia	Clear Open Dia	Inspection Cocer	Weight(Kg)
	1080	900	350	81

Application

• Gas stations

● Easy to use

Clear open 900mm extra large size, convenient for personnel to enter operation, and safer at the same time.

Due to the particularity of the material and the advantages of the structure, BETTER COVER brand SMC composite manhole covers are  achieving Load Ratings: D400 (40TON), E600 (60TON).

At the same time, the lightweight of the product is achieved，The weight is 1/4 of the cast iron manhole cover of the same grade.It protects the operator's waist health, saves installation and maintenance costs, and makes work more efficient and easier.



Locking gas station composite manhole cover with inspection hole, the inspection manhole cover is lighter and can be easily opened by a single person, which is convenient for the gas station staff to inspect, maintain and clean the oil tanks daily, and improves the work efficiency.


● Strong Sealing Performance

The oblique cut design of the sealing ring has a large contact surface, increasing the sealing strength.
High fit of manhole cover and seat, stable structure and tiny deformation.

● Lock structure

Gas stations often have large and heavy trucks driving.  It is best to use embedded manhole covers with locking structures to prevent vehicles from frequently pressing over the manhole covers. Causing the manhole cover to loosen, displace or fall off

Embedded locking structure


● Strong corrosion resistance and anti-static

Gas stations have special environmental requirements for chemicals and petroleum products, requiring manhole covers to have higher corrosion resistance and anti-static.
The high-performance resin, glass fiber and special production process formula used in composite materials ,chemical resistance (acid, alkali, salt, organic solvent, etc.),which has better corrosion resistance and can better resist chemicals. corrosion and reduce the risk of accidents.

BETTER COVER’s independently developed “T-SMC composite material”

T-SMC Material advantages
T: Stands for extremely high glass fiber content, which means it`s more than 45%,Ensure glass fiber is fully soaked in resin through special process



T-SMC Material production line
To strictly control the ratio of raw materials, digital metering is been adopted,which can achieve high accuracy, i.e.within 50g.

●Waterproof and non-slip

Because the upper surface of the manhole cover is a raised bridge structure, it can effectively prevent the accumulation of rainwater on the surface of the manhole cover. The anti-skid ability of the surface of the manhole cover is greatly improved.

●Tool