Is this standard still active?

No, it has been superseded by IS 4928:2018. The latest version should be used.

What is the required material for the valve body?

Leaded Tin Bronze conforming to Grade LTB 2 of IS 318, or Stainless Steel Casting Grade 1 of IS 3444. (Clause 4.1)

What is the hydraulic test pressure for the delivery valve body?

The body must withstand a hydraulic pressure of 2.1 MN/m² (21.4 kgf/cm²) for 5 minutes without leakage. (Clause 7.2)

What nominal sizes of valves are covered by this standard?

This standard covers valves of nominal sizes 63 mm, 75 mm, and 100 mm. (Clause 3.1)

IS 4928

: 1986

delivery valve for centrifugal fire pump outlets

CurrentSpecializedSpecificationBIMFire Safety · Fire Fighting

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This standard specifies the requirements for materials, dimensions, construction, and performance of screw-down type delivery valves for centrifugal fire pump outlets. It covers oblique and right-angle pattern valves of 63 mm, 75 mm, and 100 mm nominal sizes.

delivery valve for centrifugal fire pump outlets

Quick Reference Values

Nominal Valve Sizes63 mm, 75 mm, 100 mm

Hydraulic Test Pressure (Body)2.1 MN/m² (21.4 kgf/cm²)

Hydraulic Test Duration5 minutes

Seat Leakage Test Pressure1.4 MN/m² (14.3 kgf/cm²)

Seat Leakage Test Duration2 minutes

Practical Notes

This 1986 version is superseded. For all new designs, procurement, and installations, refer to the latest revision, IS 4928:2018.

Ensure the valve pressure rating (2.1 MN/m²) is compatible with the design pressure of the fire fighting system and the pump's shut-off head.

Verify the ISI certification mark on the valve body as a proof of compliance with the standard.