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  1. Email :
  2. Tel : +86-15116381985
  3. Add : Headquater Address : No.12, Dongshi Road, Changsha Economic Development Zone, Changsha, Hunan Province, China
  4. Foundry Address : Foundry Address: NO.260,Jinchang Road,Jinjing Town,Changsha,Hunan Province,China

Square Manhole Cover&Frame

Catalog NumberA-Cover SizeB-Clear OpeningC-Frame SizeD-Frame HeightE-Duty ClassF-Lockable
square recessed cast iron manhole cover670*670610*610820*820120B125no
All dimensions in mm.

Main business: hydraulic access cover, power manhole cover cover, electric manhole cover cover, intelligent monitoring manhole cover cover, intelligent communication manhole cover cover, intelligent water manhole cover cover, intelligent password lock manhole cover cover, integrated pipe gallery manhole cover cover, etc. It is a strategic partner of famous enterprises such as Huawei, China-telecom, Unicom, Zhongshan Dahua, CSCEC, CCCC, China Railway, Xi'an electric power, and the only supplier of Hong Kong Zhuhai Macao Bridge.Our products are exported to 32 countries and regions, Italy, Spain, UK, Malaysia, Middle east, Singapore, South Korea, Japan, Australia,Africa, etc,175 cities around the world.

Founded 1993, Cast-King Foundry was a industry leader in exporting square recessed cast iron manhole cover with lock to every continent of this earth, Just purchase directly at good price from manufacturing factory as reliable supplier, save the money usually earned by a trading company.

OEM & OED is available, look forward to having you as your agent in your local market.

We would push you to great success in municipal construction and infrascture project.

Look forward to being partner with those who are engaged in whole sale business for building material, any customized high quality mechanical and industrial casting are prvovided by us as manhole cover.

More Details


Ductile manhole cover


Ductile iron GGG50/7, gray iron






Round, square, rectangle


200mm-1300mm or as per customers’   drawing


Bituminous black or as your   requirement


DISA Line, Hand Modelling


Drawing-mould making-raw   casting-sand blasting-rough machining-surface treatment-product inspection

Advanced technology and equipments

Tensile strength: 500Mpa Yield stress: 320Mpa
  Elongation rate: 7%
  Hardness: HBS170-230

Load capacity

B125 C250 D400 E600 F900


Machining:+/-0.02mm, finish   machining:0.002mm


Footway, pedestrians, car parks,   aircraft pavements


Longevity corrosion resistance,   excellent anti-pressure

 Detailed Product Description

1)We can casting / forging manhole cover according to your sample or drawing. 
2)The material is according to your request.

3)Supply perfect quality all kinds of forgings with competitive price and excellent service.


1.Material: iron cast, as per customer's requirements .

2.Product Status: Semi-finished castings Or Finished Products

3.Excellent performance, long using life and competitive price.

4.High intensity and rigidity.

Besides above, our products have many advantages

1, High precision.We have strict material selection and special process ensure the stability of the parts; advanced machining process and equipment ensure the accuracy.

2, Low cost. Our material utilization reached 90% which saves your money.

3,In sales.Fluent communication and highest quality keep the successful deal.

Energy saving requirements lead to the redesign of parts to achieve light weight and high efficiency, which must remind designers to pay attention to materials. Nodular iron is increasingly considered to provide high strength weight properties and can be produced at a relatively low cost. When the tonnage of nodular iron increases and the market penetration is amazing, this material can never be seen to reach its full potential. Based on this, it is suggested to reconsider the possibility of producing nodular cast iron in a good way.

Therefore, it is expected that with the replacement of gray cast iron, malleable cast iron and cast silver parts, the continuous increase of production tonnage of nodular iron can be seen. Published publications are good for helping manufacturers in this area, although the calculation will be improved. However, when the temperature of molten iron is lower than 1450 "C, the inoculation effect is very poor, and the RG value is almost unchanged. From table 3, we can see that the quality index of inoculated cast iron melted with cast coke is 18% higher than that melted with metallurgical coke, and it is worth noting that the relative hardness is reduced by 3%.

casting process web use.jpg

Any Customized Model is available from us

Any question, please feel free to contact us
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Hunan Castking Foundry Technology Co.,Ltd