This standard outlines the specifications for pneumatically controlled door closers suitable for lightweight doors with a maximum mass of 40 kg. It details the requirements for design, materials, testing procedures, marking, and packaging to ensure dependable automatic closing and speed control. The document serves manufacturers, engineers, and quality inspectors involved with door hardware selection and evaluation.
نظرة عامة
This standard outlines the specifications for pneumatically controlled door closers suitable for lightweight doors with a maximum mass of 40 kg. It details the requirements for design, materials, testing procedures, marking, and packaging to ensure dependable automatic closing and speed control. The document serves manufacturers, engineers, and quality inspectors involved with door hardware selection and evaluation.
الجمهور
المحتويات
الهيكل
الأسئلة المتكررة
As per the 1982 specification, pneumatic door closers covered under this code are designed to operate on doors with a weight limit of up to 40 kilograms. The standard ensures these closers perform reliably on lightweight doors without defects or damage.
The standard specifies materials such as brass, mild steel, and aluminium for cylinders; steel, cast iron, aluminium alloys, and zinc alloys for pistons and rods; mild steel, cast iron, aluminium alloys, zinc alloys, and cast brass for brackets and fittings; steel for springs; and brass, bronze, aluminium alloys, steel, and zinc alloys for regulating screws, all adhering to specific Indian Standards referenced in the document.
The closing velocity is controlled by altering the tension of the helical torsion spring inside the door closer mechanism. Tightening the spring increases the closing speed, while loosening it decreases the speed. Adjustment is typically performed using a regulating screw that also influences the pneumatic damping effect, ensuring a smooth and controlled door closure.
Endurance is tested by mounting the closer on a door of maximum permitted weight and operating it through 50,000 cycles at a rate of 6 to 8 cycles per minute, with a minimum continuous run of 3,000 cycles. The door closer must sustain this without defects or performance degradation. Leakage resistance is assessed by inspecting for oil leaks and maintaining hydraulic damping integrity throughout and after the endurance test.
Each door closer must display the manufacturer's name or trademark along with a serial or batch number. Packaging boxes should also be labeled with the manufacturer's identification, quantity contained, and the serial or batch number. This labeling ensures traceability and supports quality assurance and warranty procedures.
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