What is the specified material for sluice valve surface boxes?

They are typically manufactured from cast iron conforming to Grade FG 150 of IS 210.

How is corrosion prevented on the cast iron surface boxes?

The castings must be thoroughly cleaned and coated with a bituminous or coal tar based composition.

Are dimensions standardized for all sluice valves?

Yes, dimensions are standardized in Table 1 to ensure standard valve keys can pass through the clear opening to operate the valve spindle.

IS 3950

: 1979

surface boxes for sluice valves

CurrentSpecializedSpecificationBIMMEP · Sanitary Appliances and Water Fittings

Download PDF BIS Portal Google

This standard specifies the requirements for materials, dimensions, manufacture, and anti-corrosive coating of cast iron surface boxes. These boxes are installed over underground sluice valves in water supply systems to provide protection and access for valve operation.

surface boxes for sluice valves

Quick Reference Values

material grade for cast ironGrade FG 150 of IS 210

coating materialCoal tar or bitumen based composition

application temperature for coatingApplied hot or cold as per standard practice to prevent corrosion

Practical Notes

Ensure the surface box cover is installed exactly flush with the finished road or ground level to prevent tripping hazards and avoid impact damage from traffic.

The box must be vertically aligned over the valve spindle so the T-key can be easily inserted and rotated without obstruction.

Regularly clear debris from inside the surface box to maintain access to the valve operating nut.