JB/T 2001.21-1999 This standard is a revision of JB 2021-84 "Type and size of centralized air release valve for hydraulic presses (Pg=315×100000Pa)". This standard specifies the type, size and technical requirements of centralized air release valves for water systems. This standard is applicable to centralized air release valves used in high-altitude and underground working cylinders, pipelines, etc. with a nominal pressure of 31.5MPa and inconvenient to operate during decentralized air release. This standard was first published on January 1, 1984. JB/T 2001.21-1999 Centralized air release valve for water systems (PN=31.5MPa) JB/T2001.21-1999 Standard download decompression password: www.bzxz.net
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IC.s$ 23.110 Standard of the Machinery Industry of the People's Republic of China JB/T 2001.1~2001.74—1999 Water system componentsWww.bzxZ.net Water system assembly and parts1999-06-28 Issued State Machinery Industry Bureau 2(-01-U1 Implementation Standard of the Machinery Industry of the People's Republic of China Water system Central air escape valve Type and size Watcr system-manifold air-escape-Typenndsize [PN=31.5 MPa] Added the type, size and technical requirements of the air release valve used in the water system. JB/T2001.21—1999 Represented 1221—34 Small standard with 31.5MPa, the inconvenience of gas exploration in high altitude underground cylinders, pipelines, etc. The centralized air release valve ? The referenced standards 1 are included in the marked clauses, which constitute the clauses of this standard through reference in this standard. When this standard is published, the full version shown is valid. All standard parts will be revised, and the parties using this standard should discuss and use them as soon as possible. The possibility of a new version of the standard is listed. J2T2001201999 Water System Centralized 1 Air Release Valve Core [PN = 31.5MPa] 3 Types and Sizes 3.1 The standard adopts 014×3m! According to the number of air release valves, there are two types: Type 1: a nested air release valve core [see Figure]: Type 1: a centralized air release adjustment core (Figure 1. 3.2 The size should comply with the provisions of 1 and 1 3.3 Figure 1 + 2! The central air valve core" is in accordance with the provisions of 1B/2001.20. Table 22001.2:.1 J3.T 2001.21.2 China Machinery Industry Bureau approved on 1999-06-28 4 2000-01-1 implementation 4 Technical requirements 1B/2001.21-1999 [-body: 2-centralized venting core; 3-accumulation period connection.1 4.1 Nominal 3].5MPu, test pressure 42MPa. 4.2 The body and the core are tested together to check the valve strength and tightness. The test method is shown in the technical specification of HT2001.20. Example of centralized venting valve: centralized venting type 1 J3/T2001.21-1999 Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.