This standard outlines the specifications for concealed hydraulic door closers designed for vertically hinged doors weighing up to 80 kg. It details the requirements related to design, materials, testing, performance, and marking to ensure efficient automatic closing with adjustable hydraulic damping. The standard is crucial for professionals involved in manufacturing, quality assurance, and installation of these door closers in various building types.
Overview
This standard outlines the specifications for concealed hydraulic door closers designed for vertically hinged doors weighing up to 80 kg. It details the requirements related to design, materials, testing, performance, and marking to ensure efficient automatic closing with adjustable hydraulic damping. The standard is crucial for professionals involved in manufacturing, quality assurance, and installation of these door closers in various building types.
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Contents
Structure
Frequently Asked
The standard specifies permissible materials for main parts of concealed hydraulic door closers in Table 2 (Clause 6). These include aluminium alloys for the main body, steel or cast iron for pistons and end plugs, steel for springs, neoprene rubber for valve packing, brass or steel for regulating valves, and mineral oil resistant materials for seals. Hydraulic fluid must be a high-viscosity, all-weather resistant oil conforming to IS 3098. This combination ensures durability, corrosion resistance, and optimal hydraulic performance.
The closing velocity is regulated via a speed regulating screw located on the valve assembly of the door closer. Each unit is supplied with a fitting key or spanner for this purpose. Turning this screw modifies the flow rate of the hydraulic fluid, thereby adjusting the closing speed. The standard requires that after temperature conditioning, no leakage or defects should be observed, ensuring consistent performance.
Conformance involves both performance and endurance assessments. Performance tests evaluate construction, finishing, dimensions, interchangeability, and functionality, with sample sizes and acceptance limits based on batch size. Endurance tests require a smaller sample subjected to prolonged operational cycles. Passing all tests is essential for batch acceptance, ensuring the door closers meet reliability and durability standards.
No, this standard specifically applies to concealed hydraulic door closers for vertically hinged doors with a maximum weight of 80 kg. It excludes door closers designed for doors exceeding this weight and overhead types, which are covered under different standards such as IS 3564:1995.
Manufacturers are required to mark each door closer clearly with the producer's name or trademark, the type designation (right, left, or universal), size, and serial number. Packaging must be done individually in cardboard or wooden boxes with protective materials like reinforcing boards or straw to prevent damage and moisture ingress during storage and transport. Visual inspections ensure compliance, and use of the BIS Standard Mark necessitates licensure per the Bureau of Indian Standards regulations.
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