Surface Box for Valves and Gate Valves for Busy Roads Exposed

Product Introduction:

The heavy-duty surface box is specifically designed for valves and gate valves installed in bituminous traffic areas subject to heavy loads. Its adjustable drawing ring allows for a wide range of height adjustments. As the surface is compacted, a bond forms between the drawing ring and the asphalt.
The box features an integrated threaded ring that can be adjusted on-site, creating a secure connection between the drawing ring and the threaded ring. This ensures that the load is effectively transferred from the drawing ring to the threaded ring. The traffic load is then distributed to the base box through this connection, allowing the load to be evenly spread to the base plate and subsequently into the road’s subgrade. This design merges the benefits of both rolling-in boxes and rigid surface boxes.
Additionally, the angled seating of the cover and box diminishes the likelihood of rattling noises compared to traditional surface boxes. The cover is coated with epoxy powder to prevent contact corrosion and to facilitate easy removal. It is attached to the box using a positioning pin with a cotter and shim. The drawing ring also includes a directional arrow for guidance.

Manufacturing Process:

Material Preparation: High-quality pig iron and scrap iron are melted together, with magnesium added to create a ductile iron alloy.

Casting: The molten iron is poured into molds to form the basic shape of the manhole cover. Sand casting is a common method due to its precision and efficiency.

Heat Treatment: The cast pieces are treated with heat to improve strength and flexibility.

Surface Coating: Anti-corrosive coatings are applied to ensure longevity in various environments.

Quality Control: Each cover undergoes rigorous testing for load-bearing capacity, tensile strength, and dimensional accuracy.

Company Introduction:

SND has been producing and selling metal goods for about 20 years.By using manufacturing techniques including sand casting, lost wax casting, lost foam casting, and precision machining, the company has been supplying goods made of materials like cast iron, steel, stainless steel, aluminum, etc. Additionally offered are surface finishing and assembly services.

Our company has successfully created products in a variety of industries, including automotive, rail transportation, agricultural machinery, chemical, energy, electricity, water, air compressor, and construction, thanks to our consistent efforts over the past few years.

Our factories' ISO9001-accredited quality control systems guarantee a consistent and dependable quality for each and every component.

Spectrometer, ultrasonic, magnetic, permeability, elongation, tensile/yield strength, and other inspections are carried out as part of routine production procedures.

Product Description:

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SND Foundry have been specializing in the production and sales of manhole cover and gully grating, valves, pipe & pipe fitings and metal castings products nearly 20 years. It is located in Wu'an Industrial Park, Handan City, Hebei Province. The park is the largest mechanical casting spare parts processing industrial park in Handan, with a complete supporting industry chain and convenient transportation.

SND has fully passed the ISO9001 quality management system certification. During the production process, it implements a number of strict detailed standards and conducts full-process quality control. Our company has well-equipped chemical laboratories and physical performance laboratories. A complete set of testing equipment such as Direct Reading Spectrometer, Metallographic Microscope, Rockwell Hardness Tester, Universal Material Testing Machine, Non destructive testing(NDT), and Three-dimensional Coordinate Measuring instrument can be used to effectively control chemical composition and ensure mechanical performance.

Company Mission:
Committed to creating high-quality products and service, creating a century enterprise trusted by customers, respected by society, the most valuable and internationally influential
Work Attitude: Responsibility Pragmatism Professional