This standard outlines the technical criteria for landing valves used in fire protection installations, particularly those situated at stairway landings for wet riser hydrants. It details the construction, materials, dimensions, operational performance, and testing methods for both single and double outlet valves, ensuring dependable water delivery and longevity under firefighting scenarios. It is crucial for manufacturers, fire safety designers, and building services specialists involved in the selection or fitting of internal hydrant valves within India.
Overview
This standard outlines the technical criteria for landing valves used in fire protection installations, particularly those situated at stairway landings for wet riser hydrants. It details the construction, materials, dimensions, operational performance, and testing methods for both single and double outlet valves, ensuring dependable water delivery and longevity under firefighting scenarios. It is crucial for manufacturers, fire safety designers, and building services specialists involved in the selection or fitting of internal hydrant valves within India.
Audience
Contents
Structure
Defines the shapes and sizes of various valve types illustrated in Figures 1 to 4. Specifies materials such as forged brass (Grade FLB) for tooth seat valves per IS 6912:1985 or IS 291:1989, and ABS plastic for blank caps. Details rounding rules for test figures according to IS 2:1960 and lists referenced standards including IS 291:1989 and IS 3444:1987.
Covers detailed shapes and measurements as per Figures 1 to 4 in Clause 5.2, rounding rules as per IS 2:1960, and thread specifications conforming to IS 2643 (Part I) - 1975 for G3 threads. Annex A lists complementary Indian Standards for complete compliance.
Defines key terms related to valve geometry and dimensions, adhering to Figures 1 to 4. Specifies thread standards using IS 2643 (Part I) - 1975 for G3 threads and outlines rounding principles based on IS 2:1960.
Specifies forged brass (Grade FLB) for tooth seat valves, ABS plastic for blank caps, corrosion-resistant alloy steel and nickel-base castings per IS 3444:1987, and packing threads as per IS 2643 (Pt I) - 1975. Includes a summary of applicable IS codes for materials.
Details shapes and dimensions of landing valves based on Figures 1 to 4, with all measurements in millimeters. Specifies wire materials for springs including phosphor bronze (IS 7608:1987) and stainless steel wire (IS 6528:1972).
Requires all valve parts to have smooth finishes free from burrs and defects. Castings must be sound without repairs. Dimensions must comply with Figures 1 to 4. Threads for packing adhere to IS 2643 (Pt I) - 1975. Rounding of figures follows IS 2:1960.
Specifies hydrostatic pressure test at 2.1 MN/m² with valve open and outlet closed for 2.5 minutes ensuring no leakage. Dimensional tolerances of ±0.5 mm apply, and rounding rules per IS 2:1960 must be followed.
Valve assemblies should bear the BIS certification mark when applicable. Markings must be clear, permanent, and include manufacturer identification, batch number, and relevant codes. Thread dimensions comply with IS 2643. Rounding of test values is as per IS 2:1960.
Includes a comprehensive list of Indian Standards related to materials, dimensions, coatings, and threads relevant to fire fighting valves such as IS 5:1978, IS 210:1978, IS 318:1981, IS 2643 (Part 1):1975, and others.
Provides information on the Fire Fighting Sectional Committee CED 22 responsible for IS 5290. Lists members from governmental ministries, research bodies, industry, and BIS officials, emphasizing multidisciplinary participation.
Frequently Asked
The standard specifies that valve bodies, bonnets, stop valves, check nuts, instantaneous female outlets, and blank caps must be made from leaded-tin-bronze (Grade LTB-2 as per IS 318:1981), aluminium alloys designated 4225, 4450, or 4600 per IS 617:1975 (die cast only), or stainless steel Grades 1 and 4 according to IS 3444. Valve spindles are made from brass rods (IS 320:1980 or IS 319:1989) when bodies are leaded-tin-bronze, or stainless steel (IS 6603:1972) when bodies are aluminium, zinc alloy, or stainless steel. Aluminium and zinc alloys must be die-cast, and painting on valve tops and handwheels follows IS 5:1978 and IS 2932:1974.
Landing valves come in two types: Type A with a single outlet and Type B with double outlets. Dimensions and shapes are detailed in Figures 1 and 2 of the standard respectively. These figures specify outlet diameters, overall lengths, widths, and the geometric profiles. Materials for valves intended for seawater use must exclude aluminium alloys to prevent corrosion. For precise measurements, one must consult the referenced figures within the standard.
The hydrostatic test involves applying a pressure of 2.1 MN/m² (21 kgf/cm²) with the valve in the open position and the outlet closed for 2.5 minutes. The valve must exhibit no leaks through its body or spindle gland during this period. Initial water droplets are permissible until the rubber seal is properly seated with the male blank cap. An additional test at 1.4 MN/m² (14 kgf/cm²) with the valve spindle closed ensures no leakage through the valve or seat.
Under IS 5290, landing valves must achieve a minimum flow rate of 900 litres per minute at a pressure of 0.7 MN/m² (7 kgf/cm²) for single outlet valves (Type A), and 1800 litres per minute at the same pressure for double outlet valves (Type B). These flow rates ensure the valves deliver sufficient water supply for fire fighting applications.
Landing valves must be permanently and clearly marked on the valve body with the manufacturer's name or trademark, a code letter indicating the valve type and instantaneous female outlet style, and the year of manufacture. Marking must be durable and legible, with colors conforming to IS 5:1978. These markings facilitate traceability, compliance verification, and maintenance.
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