The standard outlines specifications for exposed hydraulically controlled door closers intended for vertical hinged doors opening to one side, with weights up to 80 kg. It details requirements concerning design, materials, performance testing, and packaging to guarantee dependable automatic closing with hydraulic speed control. This guideline is crucial for manufacturers, suppliers, and professionals involved in the design, selection, and inspection of hydraulic door closers used across residential, commercial, and public structures.
Overview
The standard outlines specifications for exposed hydraulically controlled door closers intended for vertical hinged doors opening to one side, with weights up to 80 kg. It details requirements concerning design, materials, performance testing, and packaging to guarantee dependable automatic closing with hydraulic speed control. This guideline is crucial for manufacturers, suppliers, and professionals involved in the design, selection, and inspection of hydraulic door closers used across residential, commercial, and public structures.
Audience
Contents
Structure
Defines terminology and the range of application for exposed hydraulic door closers. Addresses construction, finishing, dimensional criteria, part interchangeability, and performance evaluations.
Lists associated Indian Standards related to materials, testing methods, and rounding off rules essential for the specification's implementation.
Clarifies specific terms and nomenclature related to hydraulically regulated door closers for uniform understanding.
Details classification of door closers according to door mass and width, including typical usage scenarios for each designation.
Provides a comprehensive list of acceptable materials for various parts of the door closer, along with corresponding IS references.
Outlines construction guidelines, finishing standards, dimensional tolerances, and interchangeability of components.
Specifies the performance standards door closers must meet, including functional testing and defect thresholds.
Describes sampling sizes, acceptance and rejection numbers, and testing procedures for evaluating door closers.
Details surface preparation steps such as cleaning, pickling, phosphating, and application of fillers to enhance corrosion resistance.
Specifies packaging materials and methods, protection measures during transport, and marking requirements for identification.
Lists mandatory accessories supplied with door closers and includes installation, operation, and maintenance guidelines.
Defines the sampling plans and conformity criteria for lot acceptance, including conditions for acceptance, rejection, and re-sampling.
Outlines endurance test procedures ensuring door closers maintain performance over extensive operational cycles.
Describes conditions and licensing requirements for the application of the BIS Standard Mark on door closers.
Summarizes committee composition responsible for the standard's development and key annexed data such as sampling tables and endurance test parameters.
Frequently Asked
According to the standard, components of hydraulically regulated door closers must be made from specified materials such as cast iron, aluminium alloys, zinc alloys for the body and back plates; steel for torsion springs; brass, bronze, aluminium alloys, or steel for control valve screws; and high viscosity, weather-resistant hydraulic oil. Detailed IS references are provided for each material to ensure compliance.
The standard categorizes door closers into three designations depending on the door's mass and width: Designation 1 for doors up to 35 kg and 700 mm width, typically for light or toilet doors; Designation 2 for doors between 36 and 60 kg and 701 to 850 mm width, commonly interior doors; and Designation 3 for doors weighing 61 to 80 kg and 851 to 1000 mm wide, usually main entrance doors. This classification ensures suitable hydraulic control for different door sizes.
Compliance requires performance testing within 15 minutes after conditioning to confirm no defects or hydraulic oil leakage. Endurance testing is conducted based on lot size with sampling plans specifying acceptance and rejection criteria. Additional tests include assessments of construction, finish, dimensions, interchangeability, and hydraulic speed regulation to ensure reliable operation.
Hydraulic speed control is achieved by adjusting the regulating or control valve screw, allowing compensation for temperature variations from -10°C to 50°C without changing hydraulic fluid. Testing involves operating the closer through defined cycles and verifying performance within 15 minutes post-conditioning to confirm absence of leaks or defects as per the procedures outlined in the standard.
Sampling involves selecting test units based on lot size, with defined first and second sample sizes. Acceptance is determined by the number of defective units found: if defects are at or below the acceptance number, the lot is accepted; if defects reach or exceed the rejection number, the lot is rejected. In intermediate cases, a second sample is tested and combined results decide conformity, ensuring balanced quality control.
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