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    Valve of all kinds of basic common sense
    SendTime:2017-01-05  Views:

    First, according to the connection with the pipeline, according to the valve and pipe connection can be divided;

    1 flange connection valve: valve body with flange, and pipe flange connection valve.

    2 threaded connection valve: valve with internal thread or external thread, and the pipe with threaded connections.

    3 welding connection valve: the valve body with a welding port, and the pipeline with the valve welded connection.

    4 clamp connection valve: the valve body with a clip, and the pipe with a hoop connected to the valve.

    5 card sleeve connection valve: the valve is connected with the pipe.

    According to the use and role of classification

    Cut-off valve is mainly used to cut off or turn on the media flow. Including gate valve, globe valve, diaphragm valve, ball valve, plug valve,

    Butterfly valve, plunger valve, ball valve, needle type meter valve.

    Regulating valve is mainly used to regulate the flow of media, pressure, etc.. Including control valve, throttle valve, pressure relief valve, etc..

    Check valve to prevent the media back. Check valve comprising various structures.

    Diverter valve is used for separation, distribution or mixed media. Including a variety of structures, such as distribution valves and traps.

    The safety protection of safety valve used in medium overpressure. Including various types of safety valve.

    According to the main parameters of classification

    (a) according to the pressure classification

    Vacuum valve working pressure lower than the standard atmospheric pressure valve.

    Low pressure valve nominal pressure PN less than 1.6MPa valve.

    Medium pressure valve nominal pressure PN 2.5~6.4MPa valve.

    High pressure valve nominal pressure PN10.0~80.0MPa valve.

    Ultra high pressure valve nominal pressure PN greater than 100MPa valve.

    (two) classification by media temperature

    High temperature valve greater than 450'C valve.

    Medium temperature valve 120'C~450'C valve.

    Room temperature valve -40'C~120'C valve.

    Low temperature valve -100'C~-40'C valve.

    Ultra low temperature valve less than -100'C.

    (three) classification of valve body material

    Non-metallic materials, such as ceramic valves, glass steel valves, plastic valves.

    Metal materials valves: such as copper alloy valves, aluminum alloy valves, lead alloy valves, titanium valves, Meng Naier alloy valves

    Cast iron valves, carbon steel valves, cast steel valves, low-alloy steel valves, high alloy steel valves.

    Metal body lining valve: such as lining lead valve, lined with plastic valves, lining enamel valve.

    Universal classification

    This classification method is not only according to the principle, function and structure, is the most commonly used classification methods. General points

    Gate valve, globe valve, throttle valve, instrument valve, plunger valve, diaphragm valve, plug valve, ball valve, butterfly valve, check valve, pressure reducing valve

    Safety valve, drain valve, valve, valve, filters, drain valve etc..

    Perform standard classification

    China standard name corresponds to international standard

    GB1222089 universal valve logo ISO5209

    GB1222189 flanged metal valve structure length ISO5752

    Connect the ISO5210/1~3 GB1222289 multi turn valve actuator

    Connect the ISO5211/1~3 GB1222389 part turn valve actuator

    GB12224 - 89 steel valves generally require ANSI B16.34

    GB1222589 general valve copper alloy casting technology ASTM B584

    Technical requirements for GB12226 - 89 general purpose gray iron castings ISO 185, BS, 1452

    GB1222889 universal valves carbon steel forging technical conditions of A 105, A181 ASTM

    GB1222989 valves - Specification of carbon steel castings ASTM A703

    Technical requirements for GB12230 89 general purpose austenitic steel castings ASTM A351

    GB1223289 VALVES FLANGED iron gate valves ISO, 5996-1982, API 595

    GB1223389 general valve iron globe valves and lift check valves BS 5152, 5153

    GB12234 89 universal valve flange and butt welding connection of copper valves API 600

    GB12237 89 universal valve flange and butt welding of steel ball ISO 7121, API 607

    GB1223889 universal valve flange and clip on butterfly valve connection BS 5155

    GB12239 - 89 general purpose valve diaphragm BS, NFE, 29,

    GB1224089 general valve iron plug valves API 593

    GB1224189 safety valves General requirements ISO 4126

    Test method for performance of safety valve GB1224289 ANSI/ASME PTC 25.3

    GB1224389 spring loaded safety valve JIS B8210

    GB1224489 Valve General requirements JIS B8372, B8410

    Test method for performance of valve GB1224589 JIS B8372, B8410

    GB1224689 pilot valve JIS B8372, DSS405

    GB1224789 steam trap classification ISO 6704

    GB1224889 steam trap term ISO 6552

    GB1224989 steam trap sign ISO 6553

    GB1225089 steam traps structure length 6554 ISO

    Test method for GB1225189 steam trap ISO 6948, 7841, 7842

    GB/T13927-92 universal valve pressure test ISO 5208

    Test method for flow coefficient and flow resistance coefficient of JB/T5296-91 general valve JIS B2005

    JB/T6899-93 valve fire test ISO 10497

    JB/T7927-95 valve cast steel appearance quality requirements MSS SP55

    ZBJ16006-90 valve test and test API 598

    Classification and definition of valves

    First, the gate valve

    The valve is one of the commonly used cut-off valve is mainly used to connect or disconnect the line of media, not for regulating media flow. Valve for pressure, temperature and range of large caliber, especially suitable for medium and large diameter pipe.

    Main criteria of gate valve

    GB12232-89 "universal valve flanged iron gate"

    GB12234-89 "universal valve flange and butt welding steel gate"

    General technical requirements for internal thread connection gate valve, globe valve, ball valve and check valve GB8464-87

    GB8465.1-87 "internal thread connection