IS 14846:2000 outlines the specifications for sluice valves ranging from 50 mm to 1200 mm nominal bore, used primarily in water supply systems. It covers detailed requirements on design, materials, dimensions, testing procedures, and marking to ensure valves meet Indian standards for reliable operation in pipeline water control.
Overview
IS 14846:2000 outlines the specifications for sluice valves ranging from 50 mm to 1200 mm nominal bore, used primarily in water supply systems. It covers detailed requirements on design, materials, dimensions, testing procedures, and marking to ensure valves meet Indian standards for reliable operation in pipeline water control.
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Frequently Asked
IS 14846 specifies materials for sluice valve components in Table 1 (Clause 6). Preferred materials include grey cast iron (IS 210) for body, bonnet, and wedge; stainless steel (IS 6603) for stems; and leaded tin bronze (IS 318) for wedge nuts, shoes, and channel parts. Alternative materials such as spheroidal cast iron, cast steel, high tensile steels, brass, and phosphor bronze are also accepted under specified IS standards ensuring durability and compliance.
The dimensional tolerances for sluice valves under IS 14846 vary according to size. For length over flanges ('A'), tolerances range from ±2 mm for valves up to 300 mm, increasing incrementally to ±6 mm for sizes above 1000 mm. Other critical dimensions such as square sizes (a, X) have ±0.5 mm tolerance, length of square (C) ±1.0 mm, hand wheel size (D) ±5.0 mm, and length between squares (Y) ±0.5 mm. These ensure proper fit and interchangeability across valve sizes.
As per IS 14846, sluice valves undergo hydrostatic testing with the valve held vertically. The body test is conducted with the wedge open applying test pressure for at least 5 minutes, ensuring no leakage. Seat water-tightness tests are performed twice with the wedge closed, pressurizing alternate sides for 2 minutes each, confirming no pressure drop or seepage. Test pressures depend on PN rating, for example, 1.5 MPa for body and 1.0 MPa for seat testing at PN 1.0.
IS 14846 standardizes clockwise (right-hand) stem rotation for closing sluice valves. However, counterclockwise rotation can be accommodated if both purchaser and manufacturer mutually agree. The stem is tapped at the top to mount the hand wheel securely, and operational tests are carried out regardless of rotation direction to maintain quality assurance.
Purchasers must provide detailed specifications including valve nominal size (ranging from 50 mm to 1200 mm), nominal pressure rating, material preferences referencing Table 1, dimensional requirements adhering to Tables 2 and 3, and any necessary accessories as outlined in Annex A-1.1. Clarifying these details ensures the manufacturer can produce valves tailored to operational needs and compatibility standards.
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