This standard specifies the type, basic parameters, dimensions and technical requirements of glass-lined eccentric reducers. This standard applies to glass-lined eccentric reducers with nominal pressures not greater than 1.0MPa and design temperatures higher than -20°C to 200°C.
HG/T 2139-2009 Referenced Document
GB/T 1804 General tolerances Tolerances for linear and angular dimensions without individual tolerance indications