GB/T 37828-2019
ActiveBidirectional metal to metal sealed butterfly valve for urban heating
城镇供热用双向金属硬密封蝶阀
Application Summary AI generated
This standard specifies technical requirements, test methods, inspection rules, and marking for bidirectional metal-to-metal sealed butterfly valves used in urban heating systems. It applies to valves with nominal pressures up to PN25 and nominal diameters from DN50 to DN2000, designed for hot water or steam media in district heating networks. The standard ensures reliable sealing performance under bidirectional flow conditions, preventing leakage in high-temperature, high-pressure heating pipelines.
Related Standards
GB/T 19249-2003
Reverse osmosis water treatment equipment
GB/T 16895.3-2004
Electrical installations of buildings--Part 5-54:Selection and erection of electrical equipment--Earthing arrangements，protective conductors and protective bonding conductors
GB/T 7725-2004
Room air conditioners
GB/T 16895.22-2004
Electrical instal lations of buildings--Part 5-53:Selection and erection of electrical equipment isolation，switching and control--Section 534:Devices for protection against overvoltages
GB/Z 28597-2012
Lifts and escalators subject to seismic conditions - Compilation report
GB/Z 28598-2012
Study of the use of lifts for evacuation during an emergency
GB/Z 31822-2015
Study report on the safety requirements of public service escalators and moving walks
GB/Z 35850.3-2021
Programmable electronic systems in safety-related applications for lifts (elevators), escalators and moving walks—Part 3: Life cycle guideline for programmable electronic systems related to PESSRAL and PESSRAE
Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.