Pneumatic valve 1000 a ni.valve hawn leh khar theihna tur, gas, liquid, steam leh fluid control chi hrang hrang, structure awlsam tak, fast response, high control accuracy, safety leh reliability, etc. te tihhlawhtlinna tura driving force anga compressed air chi khat, a hnuaia mi te hian pneumatic valve fault location: FC, FO, FLC, FLC, AFL/EFO leh AFL/EFO te chu a hrilh ang che.
1, pneumatic valve chi leh hnathawh dan tur principle .
Pneumatic valve hi hmun thum atanga siam a ni ber a, chungte chu pneumatic actuator, valve body, accessories te an ni. Actuator-ah hian spring, diaphragm/piston, pneumatic rod, handwheel, etc. te a awm a, chu chuan clean compressed air chu power atan a hmang ber a, 20 ~ 100kPa gas signal emaw 4 ~ 20mA electrical signal emaw a pawm a, chutah chuan valve taksa chu a thawk a, valve core leh seat inkar chu a siamrem a, seat chu a tum ber a ni.
Valve body hi valve disc, valve cage, valve stem, valve seat, valve cage pressure ring leh component dangte atanga siam a ni ber a; Accessories-ah hian pressure reducing valve, solenoid valve, positioner, current/voltage converter, filter, flow amplifiers, leh a dangte a awm ber.
Pneumatic valve hnathawh dan chu pneumatic piston emaw gear emaw leh mechanical part dangte chu compressed air hmanga nawr a, valve hawn leh khar chu tihhlawhtlin a ni a, chu chu: Air Supply - control signal input - positioner movement - valve hawnna leh step engemaw zat a khar theih nan. Valve-in a mamawh rotary torque mamawh ang zelin design hian cylinder combination awm zat a siamrem a, spindle rotation direction chu inlet leh outlet gas awmna hmun thlak danglamin a thlak theih bawk.
Pneumatic valve hian a bik takin hlawkna a nei a ni: A hmasa berin pneumatic valve hnathawh dan a rang a, adjustment command pawh hun rei lo te chhungin a zo thei a Pahnihnaah chuan, pneumatic valve chuan cylinder lian tak nen thawhhona tha tak neiin torque driving force lian tak a nei thei a; Pathumnaah chuan, pneumatic valve chu dinhmun khirh tak chi hrang hrangah hun rei tak chhung him leh nghet taka hman theih a ni.
Pneumatic valves action form a zirin, a tlangpuiin gas open, gas closed type ah then theih a ni. Gas hawn leh khar dan tur thlan dan chu process production safety angle angin ngaihtuah a ni.
Air source a cut off chuan valve chu closed position emaw open position emaw ah a him a ni.
Air to open (air to open) chu film head-a air pressure a san chuan, valve chu a hawnna tihpunna lam hawiin a kal a, input pressure chunglam limit a thlen chuan valve chu fully open state-ah a awm a ni. A lehlamah chuan air pressure a tlahniam chuan valve chu closure lam hawiin a kal a, input air a awm loh chuan valve chu a khar vek a ni. Chuvangin, a chang chuan gas open valve pawh hi FC khar loh an ti bawk.
Close type-a boruak hnathawh dan tur (direction of action) chu boruak kal dan kalh zawng chiah a ni. Air pressure a san chuan valve chu khar lam hawiin a kal a; Air pressure a tlahniam emaw, a awm loh emaw chuan valve chu a inhawng lam hawiin a inhawng emaw, a inhawng kim vek emaw a ni. Chuvangin, a chang chuan fail to open fo.
Double acting chi khat a ni. Valve hawn leh khar action hi air source/compressed air-in a hruai vek a, action principle bulpui ber chu single action nen a inmil a, mahse double action pneumatic valve actuator-ah chuan spring a awm lo a, chu chu principle leh structure-ah chuan a buaithlak zawk a ni.
Chumi hnuah chuan hmanna kawngah chuan fault position engemaw zat (FO, FC, FL) a awm tlangpui a, valve fault-a fault awm chu Close/Fault Open tih hian air source a chhiat laiin valve action a kawk a ni.
Pneumatic valve fault awmna hmun atan chuan dinhmun engemaw zatah then a ni ber:
1, pneumatic valve device interlock action, valve position chu a hnuaia condition te hi a ni tur a ni.
FC - air source a hloh a, valve chu a khar a ni.
fo - air source a hloh a, valve chu a inhawng a, a inhawng bawk.
fl - air source a bo a, valve chu time position ah a awm a, a awm reng bawk .
FLC - air source a bo a, valve a awm a, mahse a khar duh a, valve chu closed position-ah a awm (Cylinder-a gas exhaust)
Flo - air source hloh, valve holding position mahse a inhawng duh, valve chu open position (cylinder-a gas exhaust)
2. Valve emaw switching valve emaw regulate hian device interlocking action-a a tel chuan valve position hian a hnuaia condition te hi a nei tur a ni.
FC - Air source a bo emaw, solenoid valve a bo emaw a, valve chu closed position-ah a awm a ni.
fo - Air source a bo emaw, solenoid valve a bo emaw a, valve chu open position-ah a awm a ni .
AFL/EFC -- 1. Air source a bo. Solenoid valve chu a bo lo. 2. air source a bo emaw, solenoid valve a bo emaw pawh nise, valve chu closed position-ah a awm
AFL/EFO -- 1. Air source a bo. Solenoid valve chu a bo lo. 2. air source a bo emaw, solenoid valve a bo emaw pawh nise, valve chu open position-ah a awm
Pneumatic valve through output signal valve cut off, connected, adjustment leh function dang, a opening leh closing speed te chu a rang hle a, fast two-position cut off atan hman a ni fo thin a, hman dan tur siamthat nan pawh hman theih a ni a, accessories hrang hrang hmangin control method hrang hrang i thleng thei lo.
2, pneumatic valve common failure .
1 pneumatic valve leakage a chhiat leh a chhan .
Pneumatic valve leakage hi valve switch-ah a innghat ber a ni. Thuhmahruaiah chuan pneumatic valve leakage a pun chhan ber chu a hnuaia thil pahnih vang a ni ber: Pakhatnaah chuan, pneumatic valve-a valve spool chu a rei lutuk avangin a chhe a, chu chuan valve khar a ti tight lo a, chu chuan leakage a tipung a A pahnihna chu valve chu thil dang emaw, internal bushings emaw nena inhmeh a nih chuan, emaw, media hrang hrang inkara pressure control hnuaiah emaw, medium-a pressure danglamna a lian chuan rigidity a tlahniam ang a, chu chuan valve chu a khar vek loh phah ang a, a tawpah chuan pneumatic valve leakage a tisang ang.
2 Pneumatic valve leh a chhan .
Signal pressure a nghet lo emaw, air source pressure a nghet lo emaw pawh nise, pneumatic valve chu a nghet lo thei bawk. Signal pressure nghet lo chuan regulator output chu a nghet lo ang a, air source pressure a nghet lo chuan compressor capacity tlemte avangin pressure reducing valve chu a fail ang. Positioner-a amplifier spray block awmna hmun chu a inang lo thei bawk a, an inkar a inthlauhna chuan pneumatic valve chu a nghet lo hle bawk. Chu bakah, output tube emaw output line emaw a tight lo a, pneumatic valve action pawh a nghet lo ang; Amplifier ball valve hian pneumatic valve stability a nghawng dawn bawk a, hei hi foreign matter nena gap a inhnawh tawn vang a ni.
3 pneumatic valve vibration a chhiat leh a chhan .
Pneumatic valve te hi an hnathawh laiin an chhehvel boruak thilin awlsam takin a nghawng thei a ni. Bushing leh spool hna rei tak an thawh hnuah, an pahnih hian friction action hnuaiah gap an siam ang a, pneumatic valve vel ah vibrating mechanical equipment dang a awm ang a, pneumatic valve installation position unbalanced chuan pneumatic valve vibration a thlen ang. Chu bakah, pneumatic valve size chu dik lo taka thlan a nih emaw, single-seat valve closing direction chu medium flow direction nen a inmil lo emaw chuan pneumatic valve hian vibration a thlen bawk ang.
4 pneumatic valve slow action a chhiat leh a chhan .
Pneumatic valve movement kalpui danah chuan valve stem pawimawhna chu rinhlelh rual a ni lo. Valve stem chu a ben chuan a round atanga friction lo chhuak chu a tipung ang-Trip action chuan pneumatic valve chu zawi zawiin a thawk ang. Graphite leh asbestos filler lubricating oil, PTFE filler hi a pangngai loh chuan pneumatic valve slow action a thlen bawk ang a, valve body chhunga leivut a awm chuan positioner chhungah pneumatic valve dah a ni ang a, etc., pneumatic valve stem operation resistance a tipung ang a, chu chuan pneumatic valve slow action a siam ang.
5 pneumatic valve a thawk lo a, a chhan pawh a awm thei .
air source leh signal chu premise leh basis atan pneumatic valve te chu a kal tluang theih nan. Positioner-in air source a neih loh chuan pressure reducing valve chu a fail thei a, a nasat chuan filter leh pipeline a block thei bawk. Locator hian air source a neih chuan, mahse output a awm loh chuan locator throttle hole chu a block ang; Air source leh signal a awm loh chuan, temperature a hniam chuan air source a inhawng lo va, a fail dawn a, a chhan chu pressure reducing valve leh air duct a block avangin a tawpah chuan compressor a chhiat phah a ni. Thli chhuahna a awm a, mahse signal a awm loh chuan omental plate a tichhia ang a, locator-a bellows te chu boruak a leak tir ang.
3, pneumatic valve hmanga harsatna chinfel dan tlangpui .
1 pneumatic valve leakage enkawlna tihpun dan tur .
Pneumatic valve leakage a san chhoh zel dan ngaihtuah chuan valve spool a bun a nih chuan, a chhunga leakage avanga leakage awm zat tihtlem nan spool thar thlak nghal a ngai a Valve-a thil dang dah tel a nih chuan, thil dang paih chhuah nan tihfai leh silfai nan tihfai nan hman a ngai a ni Medium pressure difference a lian a nih chuan pneumatic valve actuator siam that a ngai a, air source tihpun a ngai a, leakage tihtlem a ngai bawk. Tin, pneumatic valve dah hunah pawh valve stem sei zawng thlan chu a tlem hle tih enfiah tur a ni bawk a, chu chu valve avanga leakage awm loh nan a ni.
2 Pneumatic valve hnathawh nghet lohna (unstable operation) hman dan tur .
Signal pressure nghet lo vanga pneumatic valve-in unstable action a neih dan ngaihtuah chuan power network system nghet taka kalpui a ngai a ni. Air pressure nghet lo avanga pneumatic valve awm nghet lo tak action awm dan ngaihtuah chuan positioner chu re-adjusted a ngai a, a tul chuan positioner thar pawh thlak theih a ni a, chutiang chuan air pressure a nghet theih nan. Valve stem chu reinstall leh emaw, lubricant tihpun emaw a theih bawk a, chu chuan valve stem contact part-a friction a tihziaawm a, pneumatic valve-a instability a tihziaawm a, positioner outlet position dik tak chu pneumatic valve instability tihbo nan a siamrem theih bawk.
3 pneumatic valve vibration fault enkawlna hmanrua .
Bushing leh spool inkara inhnawh tawnna avanga pneumatic valve vibration awm tur chuan bushing chu thlak nghal a ngai a Pneumatic valve vel pneumatic valve vel a vibrating mechanical equipment dang avanga pneumatic valve vibration atan chuan vibration source chu uluk taka zawn chhuah a, vibration tihbo a ngai a Unstable pneumatic valve base avanga vibration lo awm chu ngaihtuah chuan base thar thlak a ngai a; Single-seat valve closing direction leh medium flow direction inkara inmil lohna avanga vibration lo awm chu thlirin, analyze leh judge a, pneumatic valve install dan dik tak siamrem a ngai a ni.
4 Pneumatic valve slow action harsatna sutkian dan .
Pneumatic valve hnathawh slow tak hi diaphragm chhiatna nen a inzawm ber a, chuvangin diaphragm thar chu a hun takah thlak a ngai a leh graphite leh asbestos filler lubricating oil leh polytetrafluoroethylene filler te chu a pangngai em tih uluk takin enfiah la, a tul chuan a dinhmun pangngaia a awm leh awm loh enfiah Valve body-a thil dang awm chu a hun takah tifai la, valve taksa thianghlimna a awm theih nan; Valve stem chu valve stem leh a chhehvel components inkara friction tihziaawmna turin treatment a ni a, chutiang chuan pneumatic valve slow operation chungchanga harsatna chu a chinfel theih a ni.
5 pneumatic valve hian harsatna sutkian dan a thawk lo .
Air source awm mahse pneumatic valve a thawk lo fault tan chuan command line pakhat hnu pakhata check a, a hun taka fault awm chu paih chhuah a ngai a ni. Pneumatic valve-a positioner-in input leh display a neih loh chuan positioner thar chu a hun takah thlak a ngai a; Spool leh stem-a deformation na tak tak neih nan chuan spool leh stem thar chu a hun takah thlak a ngai a, chu chuan handwheel chu a awmna tur dik takah a dah a ni.
