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:Why do you have to add a spring washer when it comes to the role of ah ah ah
The main function of the spring washer in the mechanical design, production to prevent the nut (or bolt) automatically loose, and even force.
Q:How to use washer, gasket, o-ring "
Three are used to enhance the sealing performance of the accessories, in general:Washer gasket, a uniform thickness of the ring, used in the bolt to enhance the connection between the fastening; gasket gasket, a variety of shapes, for a variety of occasions, enhance the tightness. In general, both are metallic and washer is included in the category of gasket.Liner and O-ring are commonly referred to as sealing ring, rubber material, shaped like a mini version of the buoy, but the wall thickness is larger and better elasticity, mainly used for instrument installation in Glen head.
Q:how to Flat washer installation
Flat washers are used on both sides, are required to install.
Q:Specific conditions for use of spring washers
The conditions for the use of spring washers are as follows:The application of spring washer, can be applied to the following four standards: standard spring washer (GB93-1987), light spring washer, (GB859-1987), heavy spring washer (GB7244-1987).The purpose of the spring washer is to prevent the nut from loosening. In the national standards are illustrated. The six corners of the slotted nut is matched with the bolt and screw for end with hole, so that the split cotters inserting screw nut from the groove in the hole, preventing the nut macnaught loose, mainly used for vibration load or alternating load applications.
Q:I would like to ask what is the standard gasket and gasket in general what material?
Less dosage, the metal with Q235, rubber with XB200, are very common. If the amount is large, according to the situation to choose the most economical
Q:How do you choose the appropriate gasket for bolt or screw connection?
Mainly depends on your needs, such as the bolt is M10, you have to choose the matching. A variety of information can be found from the hardware manual.
Q:When do flat washers use GB95 when using GB97.1?
See tolerance, high requirements with GB97.1. if in order to save money, and the application environment is not high, use GB95.
Q:What is the meaning of the gasket / gasket material bar 200HV?
Washer / gasket material bar indicates that 200HV is the material mechanical performance grade for steel 200HV.Example: standard series, nominal size d=8mm, performance grade 200HV, without surface treatment of flat washers: washers GB97.1 - 858 200HVA 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:Would like to know the role of flat washer?
to Increase the stability factor to make it more stable
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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