Eng hivalve a nicavitation a awm em? Engtin nge tihbo theih ang?
Tianjin Tanggu Tui-Seal Valve Co., Ltd. chuan a rawn ti a
Tianjin a ni, 1999 a ni.CHINA
19-na a ni, 1999 a ni.June, 1999 a ni.2023 khan a lo piang a
Sound hian mihring taksaah nghawng tha lo a neih theih ang bawkin, frequency thenkhat chuan control valve thlan dik a nih chuan industrial equipment-ah havoc a play thei a, cavitation risk a sang hle a, chu chuan noise leh vibration level sang tak a thlen ang a, chu chuan internal leh downstream pipe-te chu rang takin a tichhia angvalve a ni.
Tin, thawm sang tak hian vibration a siam tlangpui a, chu chuan pipe, instrument leh hmanraw dangte a tichhia thei bawkValve a nihun kal zelah components chhiatna, pipeline system avanga valve cavitation avanga chhiatna nasa tak thleng thei. He chhiatna hi a tam zawk chu vibration noise energy, accelerated corrosion process leh cavitation atanga lo chhuak a ni a, chu chu shrinkage bulah leh a hnuai lama steam bubble siam leh tlakchhiatna avanga amplitude lian tak vibration noise level sang tak atanga lo chhuak a ni.
Hei hi ball-ah a thleng tlangpui nachunginvalve te a awmleh taksa chhunga rotary valve te a awm a, a takah chuan V-ball-a wafer body part ang chiah hian recovery tawi, sang takah a thleng thei a nivalve a ni, bik takinbutterfly valve te pawh a awma hnuai lam a valve chu a awm laiinvalve a niis stressed in one position prone to cavitation phenomenon, chu chu valve piping leh welding repair-a leakage awm awlsam a nih avangin valve hi line section-ah hian a tha lo.
Valve chhungah emaw, valve hnuai lamah emaw cavitation awm mahse, cavitation area chhunga hmanrua te chu ultra-thin film, spring leh small section cantilever structure te hian nasa takin a tichhia ang a, amplitude lian tak tak vibrations hian oscillations a tichhuak thei a ni. Instrument hrang hrang pressure gauge, transmitter, thermocouple sleeve, flowmeter, sampling system-ah te pawh a chhiat fo thin a ni.
Fretting corrosion, vibration-a inhnimhnawihna hmun chhe tawh inkara thleng thin hi cavitation valve bulah a awm fo thin. Hei hian hard oxides abrasives angin a siam chhuak a, chu chuan worn surface inkara wear a ti chak zawk a ni. Thil hmanrua a nghawng zingah hian isolation leh check valve te a tel a, hei bakah hian control valve,pump, rotating screen, sampler leh rotating emaw sliding mechanism dang eng pawh a awm bawk.
High-amplitude vibrations hian metal valve part leh pipe wall te pawh a ti chhe thei a, a ti chhe thei bawk. Metal particle theh darh emaw, chemical material chhe thei emaw hian pipeline chhunga media chu a ti bawlhhlawh thei a, hei hian hygienic valve piping leh high purity piping media-ah nghawng lian tak a nei thei a ni. Hei pawh hi phal a ni lo.
Plug valve-a cavitation failure prediction hi a buaithlak zawk a, choke pressure drop chhut mai mai a ni lo. Experience atanga a lan dan chuan main stream-a pressure chu a hmuna local vaporization leh steam bubble a tlak hmain liquid vapor pressure-ah a tlahniam thei a ni. Valve siamtu thenkhat chuan initial damage pressure drop tihfelna hmangin eclipse failure hmaa an sawi lawk thin. Valve siamtu pakhatin cavitation chhiatna a sawi lawk atanga a tan dan chu steam bubble a chim a, cavitation leh thawm a siam thin a ni. A hnuaia tarlan limit aia hniam a nih chuan cavitation chhiatna nasa tak a awm loh nan tih a ni.
Valve size chu inches 3 – 80 dB thleng a ni
Valve lian zawng hi inches 4-6 – 85 dB a ni
Valve lian zawng hi inches 8-14 – 90 dB a ni
Valve size inches 16 leh a aia lian – 95 dB
Cavitation chhiatna tihbo dan tur
Cavitation tihbo nan valve design bik siamah hian split flow leh graded pressure drop te hman a ni:
“Valve diversion” tih hi flow lian tak chu flow tenau engemaw zatah then a ni a, valve flow path chu flow chu parallel small opening engemaw zat atanga luang chhuak turin ruahman a ni. Cavitation bubble lian zawng portion chu flow kalna opening kaltlangin chhut a nih avangin. Opening te zawk hian bubble te te a siam thei a, chu chuan thawm a ti tlem a, chhiatna a thlen chuan chhiatna a ti tlem bawk.
“Graded pressure drop” tih hian valve chu adjustment point pahnih emaw a aia tam emaw series-a awm tura siam a nih avangin pressure drop zawng zawng chu step khata tih ai chuan step tenau zawk engemaw zat a la a ni. Mimal pressure drop aia tlem chuan shrinkage-a pressure chu liquid vapor pressure tlahniam lo turin a veng thei a, chu chuan valve-a cavitation phenomenon chu a titawp thei a ni.
Valve khata diverting leh pressure drop staging te inzawmkhawm hian cavitation resistance by. Valve modification lai hian control valve positioning leh valve inlet-a pressure a sang zawk (eg, upstream lam hla zawk, emaw height hniam zawkah), a chang chuan cavitation problems a awm lo.
Chu bakah, control valve chu liquid temperature awmna hmunah dah a, chuvangin vapor pressure hniam (low temperature side heat exchanger ang chi) hian cavitation problems a ti bo thei bawk.
Summary-ah chuan valve-a cavitation phenomenon hi degradation performance leh valve chhiatna chungchang chauh a ni tak tak lo tih a tarlang. Downstream pipeline leh hmanrua te pawh a hlauhawm hle. Cavitation sawi lawk leh tihbo tura hmalakna hi valve hman man to tak tak buaina pumpelh theihna awmchhun a ni.
Post hun chhung: Jun-25-2023
