?Cast iron manhole covers are generally divided into round and square. In the urban area, circular is generally used, because the round manhole cover is not easy to tilt, which can better protect the safety of pedestrians and vehicles. The use of a circle is mainly due to the fact that the circular manhole cover has the same length through each of its centers, so that if the manhole cover is rolled up by the passing vehicle, the diameter will be slightly smaller than the wellhead below. Wide, the manhole cover will not fall into the wellhead. If square is used, because the diagonal of the square is obviously longer than the length of each side, when the manhole cover is rolled up, it is easy to fall into the well along the diagonal direction of the wellhead. , causing security risks. If the wellhead is rounded or significantly smaller than the manhole cover, the square manhole cover will not fall into the well. This involves the problem of utilization and savings of a material.?The use of the wellhead depends on the size of the wellhead. If a square manhole cover with a much larger area than the wellhead is to be installed on it, then the material utilization and practical value are naturally not more effective than using a circular manhole cover directly, which not only saves the material of the manhole cover, but also The safety of the wellhead is ensured and used in the countryside and cable wells, generally square, which can better prevent the entry of liquids such as rainwater.

Size
DN400, DN500, DN600, DN700, customized as per drawing.

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1. Against theft — Composite Manhole Cover with shockproof rubber sealing is non-metallic, non-conductive and non-sparking, has no value of recycling, completely solving the theft problems.

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2. High load capacity —Its main components are fiberglass and unsaturated resin. oad capacity are A15, B125, C250, D400, E600.

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3. Free design—Such as Color, Logo, Panel, Load and Dimension can be designed according to the requirements of customer.

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4. Long life —Minimum lifespan is 30 years free of maintenance.

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5. Well sealed —It can be installed hermetically, and effectively prevent poisonous gases leaking out from cesspool. and no noise pollution or rebound.

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6. Good wear and corrosion resistance —It will never rust because it has good wear and corrosion resistance.

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7. High and low temperature resistance —Excellent insulator ( from-40°C~200°C)

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8. Lighter weight and more competitive price— the weight of composite manhole cover especially SMC manhole cover is lighter. The composite manhole cover is more convenient to transport, install and repair.

(1) Electric power pipeline well; Post, telecommunication, communication pipeline well;

(2) Street lamp well, fire control well, all kinds of valve well;

(3) City water, drainage pipeline well; Heat supplied, gas well;

(4) Anti-corrosion project, open ditch; It as well as can be made according to customers requirements.