Manhole Cover Ductile Iron Square on Sale

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Loading Port:
China main port
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: square Power Supply: AC Power
Customized: Customized Surface Treatment: Zinc Plated

Product Description:

1.Cast Iron Manhole Cover Description :

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.

A manhole cover sits on metal base, with a smaller inset rim which fits the cover. The base and cover are sometimes called "castings", because they are usually made by a casting process, typically sand-casting techniques.

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.

Long service life
Strong resistance of acid, alkali, weathering, anti corrosion of water, dust, manhole covers used for gas are well sealed which prevent poisonous gas leaking.
Temperature tolerance is at the range of -40°C-200°

3.Manhole Cover Images:

 Manhole Cover Ductile Iron Square on Sale

Manhole Cover Ductile Iron Square on Sale

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) Designs
A) EN124 Class B125 C250 D400 F 900, with different size and grammage, or as  customers' requirement.
B) as per customers' drawing or samples
4) Process
A) Molding boards

B) Hand Casting 

5) Coating
A) black bitumen or epoxy .
B)Coating as per customer's requirement

6) Different accessories are available 

7) Packing:
Wooden case or wood pallet, or as per customers' requirement 

8)  Payment terms: T/T or L/C 

9)Inspection

A)Inspection by our factory

B)The third party inspection,SGS

5.FAQ:

We have organized several common questions for our clientsmay 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. 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.

Q. I need access through my manhole cover on a regular basis, is this possible?

A. Yes, the majority of covers have built-in lifting keys, and for those that don’t we also supply lifting keys. However, the best way to obtain easy access is to have a bespoke, hinged manhole cover. 

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Q:Screw, nut, gasket connection order is how ah, elastic gasket and cushion under what circumstances should be placed on the
The effect of several kinds of flat pad, a height adjustment bolt or nut in the side is convenient; two is to increase the contact surface, flat pad at the ends of the more; three is the stable friction coefficient, flat pad on both sides, and tighten the pad is not allowed to transfer medium; four is to prevent injury to pull bolt, in order to prevent stress concentration, the bolt head and the bolt six transition angle bar has great chamfer hole chamfering small, tighten the bolts if the head injury, this washer the chamfered surface into the six hexagon head bolts can be avoided.
Q:Would like to know the role of flat washer?
In simple terms, the fastener medium has mainly above the washer, sealing, decompression, increase friction damping, fixed five role.
Q:how to use Motor washer
Spring washer loose, as well as sealing gasket, corrugated gasket clearance
Q:How do you choose the appropriate gasket for bolt or screw connection?
When the bolt is connected, the target of the washer is to disperse the material which is connected with the material, reduce the damage to the surface of the material to be connected when the bolt or the nut is reduced, or prevent the loosening of the bolt. When you choose the gasket can be the actual need to relax the use of spring washers, to protect the surface of the material to be connected, optional plain washers. The principle of choice is that the inner diameter of the washer is slightly larger than the outer diameter of the bolt. Screw connection, the use of slightly larger than the location of the largest screw flat washers can be.
Q:how much Specification for washers
From 2.5~48, the form of GB/T854-1998, GB/T855-1998, GB/T856-1998
Q:Are there any positive and negative points on the flat washer?
From the use, do not distinguish between positive and negative. From the beautiful, bright flat surface, outward
Q:Do not use self tapping screws
Self tapping screws are needed to use the gasket.A part between a connector and a nut. A flat metal ring is generally used to protect the surface of the connecting piece from the nut.
Q:When is the gasket (flat pad, spring pad)
Split washer (spring washer manufacturers generally will call washer "WASER") flat washer flat washer flat washer is generally used in 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 bad press. 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! Materials for the 65Mn (spring steel), heat treatment hardness of HRC44 ~ 51HRC, through the surface oxidation treatment. Hua, washers, meson is the same Dongdong, the name is different
Q:What is the meaning of the gasket / gasket material bar 200HV?
Surface Vivtorinox hardness, general requirements not less than the number of commonly used non-ferrous metals, such as bronze, tin bronze, etc.
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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