Relief valve technical indicators: nominal diameter DN 4 - 25 ㎜ nominal pressure: PN 25 mpa applicable medium: oxygen, nitrogen, argon, air and other applicable temperature: - 40℃- + 80 ℃ body: cast steel/stainless steel seat: copper valve cap, valve stem: stainless steel spring: spring steel valve size shape product model product code (nominal diameter ㎜) Nominal pressure ( MPa) Setting pressure ( MPa) Sealing pressure ( MPa) Weight ㎏ A21Y - 250 c / P1K10101。 61. 21. 02. 7 a21y - 250 c / P1K15150。 10. 0720. 062. 7 a21y - 250C/P2K442522202. 7 a21y - 250C/P2K662522202. 8 a21y - 250 c / P3K101063。 33. 03. 05年a21y - 250 c / P3K10M10643。 63. 05年a21y - 250 c / P3K10G102。 51. 271. 13. 09年a21y - 250C/P3K10H1043. 152. 83. 03 a21y - 250 c / P3K10I101。 00. 220. 23. 05年a21y - 250 c / P4K442518162。 5 a21y - 250 c / P4K662517。 6162. 68 a21y - 250 c / P5K10102。 51. 761. 62. 68 a21y - 250 c / P5K15152。 51. 651. 63. 8 a21y - 250C/P6K44107. 26. 42. 8 a21y - 250C/P6K66107. 66. 42. 65 a21y - 250 c / P6K6G6109。 28. 42. 73 a21y - 250 c / P6K15151。 00. 720. 62. 93 a21y - 250 c / P8K44108。 880. 6 a21y - 250 c / P8K10106。 043. 63. 05年a21y - 250 c / P101K10100。 60. 310. 281. 72 a21y - 250 c / P152K101010。 90. 82. 97 a21y - 250 c / P252K10104。 02. 552. 32. 88 a21y - 250 c / P002K15151。 60. 270. 243. 1 a21y - 250 c / P101K15151。 60. 2450. 222. 83 a21y - 250C/P1K20200. 10. 070. 063. 4 a21y - 250C/P8K25256. 04. 441. 8 a21y - 250C/P001K25251. 00. 1250. 116. 29 a21y - 250C/P002K25251. 00. 30. 274. 97 a21y - 250C/P302Ad- h15151。 60. 3 - 0. 80. 27 - 0. 724. 6 a21y - 250C/P302Ad- p32321. 60. 065 - 0. 80. 035 - 0. 725. 7 a21y - 250 c / P505Aa10104。 03. 2 - 42. 88 - 3. 63. 2 a21y - 250 c / P915Ab442519 - 2217. 1 - 19. 83. 1 a21y - 250 c / P915Aa - c662516 - 2214. 4 - 19. 82. Eight codes of the relief valve connection link form code form codes internal thread 1 7 external thread 2 8 flange clamp to the clamp 4 card set of 9 6 safety valve welding structure code structure code spring closed with heat sink full rev micro type 0 and type 1 full type 2 with wrench and all type 4 is not closed double spring tiny qi type 3 full rev type 8 tiny qi type 7 control mechanism with the rev 6 lever type single lever 2 Angle raise and type of the type 5 double lever and all type 4 guiding type 9 relief valve seat sealing surface material seat sealing surface material code seat sealing surface material code of copper alloy T permeability ammonia steel D nylon plastic rubber X boriding steel P N carbide alloy steel acid or stainless steel body ontology processing W H Y tin-based bearing alloy ( Babbitt) B note: when valve seat and Industrial Valves sealing surface material is not at the same time, use low hardness material symbol. Nominal pressure code nominal pressure code expressed with Arabic numerals, its value in mpa ( MPa） 10 times higher than the nominal pressure value for the unit. When mark working temperature and working pressure, working pressure must use P marks the highest temperature and additional medium in the bottom right hand corner P word number, the number 10 in addition to the highest temperature value of the proceeds of the integer. Such as working temperature is 540 ℃, pressure valve for 10 mpa, its code-named P54100. The relief valve body material code body material code body code gray cast iron carbon steel chrome molybdenum alloy ductile iron Q I C H chromium nickel titanium steel P chrome vanadium molybdenum alloy steel V note: PN 1 or less. Grey cast iron valve body and a PN 2 or 6 mpa. 5 mpa carbon steel body, omit this code. Relief valve manufacturers recommendation: zhejiang double valve co. , LTD
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