Μanhole Cover for Round Cover Made in China

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Loading Port:
Tianjin
Payment Terms:
TT OR LC
Min Order Qty:
1000 m.t.
Supply Capability:
100000 m.t./month

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Item specifice:

Material: Ductile Iron Standard: Round Power Supply: AC Power
Customized: Customized Surface Treatment: Nickel Plated

Product Description:

1.Ductile Iron Manhole Cover Description :
A manhole cover is a removable plate forming the lid over the opening of a manhole, to prevent anyone or anything from falling in, and to keep out unauthorized persons and material.
Manhole covers are often made out of cast iron, concrete or a combination of the two. This makes them inexpensive, strong, and heavy, usually weighing more than 50 kilograms (110 lb). The weight helps to keep them in place when traffic passes over them, and makes it difficult for unauthorised people not having suitable tools to remove them.
2.Main Features of the Ductile Iron Manhole Cover:
•High endurance
•High Strength
•Pressure Resistence
•Anti-corrosion
•Anti-theft
•Good visual effect
Safety options
There is no metal contain, directly reducing potential accident or further maintenance costs caused by thieves. Anti-slip surface offer a safe road condition even in extreme weather.
Light weight
Compared with cast iron manhole cover, FRP manhole cover is 30% lighter.
Light weight allows more loading per vehicle, more convenient transportation and economical savings.
Allows a safer working condition, which single workers is enough for installation without risk of injury.
Customer design
FRP manhole covers allow customers’ innovative design, logo, or etc. we have our own design team who can also offer design work for customers.
3.Manhole Cover Images:

Μanhole Cover for Round Cover Made in China

Μanhole Cover for Round Cover Made in China

4.Manhole Cover Specifications:
1) Production information
Manhole cover are manufactured for construction and public use. Manhole cover shall be smooth and free sand holes, blow holes, distortion or any other defects
2) Material 
A) Ductile iron GGG50
B) Grey iron GG20 
3) Packing:
Wooden case or wood pallet, or as per customers' requirement
4)  Payment terms: T/T or L/C
5)Inspection
A)Inspection by our factory
B)The third party inspection,SGS
BS EN124 A15 A50 B125 C250 D400
Watertight Waterproof
Lockable Bolts
Anti UV Antistatic Finish
Manhole Cover  BS EN124 A15 A50 B125 C250 D400
Watertight Waterproof
Lockable Bolts
Anti UV Antistatic Finish

5.FAQ:
We have organized several common questions for our clients,may help you sincerely:
Q. Can I fit a square manhole cover into a round chamber?
A. Yes, there are a select few manhole covers which are square-to-round, meaning they will fit square or round chambers.

Q. The project I’m working on requires a manhole cover with a quality finish, what’s available?
A. Naturally, galvanised steel of black polypropylene aren’t always ideal, and so we offer brass or stainless steel edging, as well as complete stainless steel covers.

Q. Odours are coming through where I have installed my manhole cover, why?
A. Your cover must be sealed and locked, or neoprene sealed, so you would require a T-Range Cover, or if you require a solid top, a selection of the PC range (e.g. PC2BG3, PC6CG3, not PC2BG) are suitable.

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Q:How to determine the number of washers
As the frame five depending on the length, five links on the left side of the 68mm length of one and two on the right side, the length of the 73mm five on the left side of the right is not installed, install a washer, the thickness is the same as long as you can buy time, usually have three washers.
Q:How to use washer, gasket, o-ring "
Different purposes, the installation position and the corresponding flange are different, if this is how to choose, advantages and disadvantages, too much information
Q:how to Flat washer installation
Spring washer loose effect is better. Note that the spring washer is a one-time, used to remove it and then do not re-use. Because the spring washer depends on the edge of the cutting edge of the nut to cut the nut to prevent the reverse movement, until the role of anti loose. Nut spring washer on the once tight, then loosen the spring washer, the oblique opening edge will reverse the cutting edge of the nut, will become blunt, often in the proposed vibration occasions additional port pin.
Q:Specific conditions for use of spring washers
Hello!National standard for spring washers:Standard spring washer (GB93-1987)Light spring washer (GB859-1987)Heavy duty spring washer (GB7244-1987)
Q:how much Specification for washers
Conventional M3-M130, there is a "SP" large outer diameter M8-M36, in general, large diameter washers used for long hole or flange nut assembly
Q:I would like to ask what is the standard gasket and gasket in general what material?
Carbon steel, if there are 45 steel, 65 manganese, that is, medium carbon steel, low carbon steel.
Q:Do not use self tapping screws
Flat washer is generally used in the connecting piece is a soft texture, a hard brittle, its main role is to increase the contact area, pressure distribution, to prevent the soft texture of the crush. The basic function of the spring of the spring washer is to tighten the nut after the nut to a force, increasing the friction between the nut and bolt! The material is 65Mn (spring steel), heat treatment hardness is HRC44 ~ 51HRC, through the surface oxidation treatment.
Q:Why do some nuts and washers, and some nuts without washers
General screw diameter and the diameter of the fastening parts of the hole is not large, the nut and parts of the contact area is relatively large, you can not add a gasket
Q:Which is better than the spring washer and the inner tooth?
The inner tooth type flat anti-skid pad is used in the mechanical combination to fasten the vibration resistant sealing components!
Q:What is the difference between gaskets and seals?
The washer pad is connected between the nut pieces and parts; sealing ring, ring is formed by one or several parts of the cover, fixed in a ring or a washer bearing and another ring or gasket contact or metal ring is the flat form of the labyrinth of narrow gap.

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