Shani shagu lang ai -diameter kaba ai stop valve ni hpe lang ai ni hta, masha ni gaw manghkang langai hpe tsun dan chye ma ai, dai gaw, n-gun n bung ai lam grai kaba ai media ni hta lang ai shaloi, steam, high-pressure hka, etc., n-gun npu hta bungli galaw ai shaloi, hpaw na matu yak chye ai. N-gun dat nna pat dat yang, galoi mung hka pru wa na hpe mu lu nna, ngang ngang pat na matu yak ai. Ndai manghkang byin pru wa ai lam a lachyum gaw, valve a hkrang masa n nga ai hte shinggyim masha a shadawn sharam madang pru ai torque n nga ai majaw re.
Caliber kaba ai Valve ni hpe hpaw ai hte pat ai hta yak hkak ai lam ni a lachyum hpe sawk sagawn ai lam
Masha kaba langai a jahtum na n-gun gaw 60-90kg rai nna, hkum hkrang n bung ai hta hkan nna rai nga ai.
Madung hku nna, shut-off valve a lwi ai lam hpe low in hte high out hku nna galaw da ai. Masha langai mi gaw valve hpe pat kau ai shaloi, shinggyim hkum hkrang gaw pat kau lu na matu valve disc hpe lawu de sit shangun na matu, lata n-gang hpe n-gup magap hku shinggrup da ai. Ndai aten hta, n-gun masum hpe kahkyin gumdin nna lai di ra ai, dai ni gaw :
(1) Axial n-gun Fa;
(2) Packing hte valve stem Fb lapran na shingjawng ai lam;
(3) Valve stem hte valve core lapran na matut mahkai ai lam a n-gun Fc .
Dai n-gun yawng gaw ∑M=(Fa+Fb+Fc)R .
Dai kaw na pru wa ai diameter kaba wa magang, axial thrust force kaba wa ai hpe mu lu ai. Dai gaw pat da ai masa hte ni ai shaloi, axial thrust n-gun gaw pipe network a tengman ai n-gun hte ni dik htum rai nga ai (hpa majaw nga yang P1-P2≈P1, P2=0 hpe pat da ai shaloi)
Ga shadawn, 10bar steam pipe ntsa DN200 stop valve lang ai rai yang, shawng na arai langai sha gaw axial thrust Fa=10×πr2=3140kg hpe pat kau ya nna, pat kau na matu ra ai shingdu grup yin n-gun gaw a shingdu grup yin n-gun hte ni dik ai. N-gun a shadawn sharam, dai majaw dai zawn bungli galaw ai masa hta marai langai mi gaw valve hpe tsep kawp pat kau na matu grai yak ai.
Teng sha nga yang, ndai zawn re ai valve hpe nhtang maga de bang na matu, jak rung nkau mi tsun ai, dai gaw hpaw na matu yak hkak ai manghkang hpe hparan ya lu ai, raitim, hpaw ngut ai hpang hpaw na matu yak hkak ai manghkang mung nga ai.
Diameter kaba ai Globe Valve ni a kata kaw na hka pru wa ai lam a lachyum hpe sawk sagawn ai lam
Diameter kaba ai stop valve ni hpe gaw, boiler pru ai shara ni, main sub-cylinder ni, steam mains ni hta lang ai rai nna, ndai shara ni hta lawu na zawn re ai manghkang ni nga ai:
(1) Madung hku nna, boiler pru ai shara kaw na pressure shai hkat ai lam gaw grai kaba ai majaw, steam lwi ai lam mung grau law ai, sealing surface hpe erosion hkra machyi ai lam mung grau law ai. Dai hta n-ga, boiler wan hkru ai atsam gaw 100% n mai byin ai majaw, boiler pru ai shara na steam hta hka law law lawm wa nna, valve sealing surface hpe cavitation hte cavitation hkra machyi shangun na zawn rai nga ai.
(2) Boiler pru ai shara makau na shut-off valve hte sub-cylinder a matu, boiler kaw na pru wa ai steam gaw aten kadun laman hta grai katsi ai lam nga ai majaw, saturation galaw ai aten hta, boiler hka hpe n-gun n rawng hkra galaw ai ladat gaw grai n kaja ai rai yang, dai a daw mi gaw law law lang hka lim mat na re. Acid hte alkali dat ni gaw, sealing ntsa kaw n-gun n rawng ai hte n-gun rawng ai lam ni hpe byin shangun na re; nkau mi gaw crystallize byin mai ai arung arai ni mung valve hpe pat da ai shara hta hkan nna crystallize byin wa ai majaw valve hpe ngang ngang n pat da lu ai.
(3) Sub-cylinder shang ai hte pru ai valve ni hpe galaw na. Valve ngut ai hpang lang ai steam a n-gun gaw kalang lang galaw shapraw ra ai lam ni hte kaga lam ni a majaw law ai (sh) kaji ai. Flow rate grai galai shai mat ai shaloi, flashing, cavitation, etc. ni hpe byin shangun na matu loi ai.Valve sealing surface ntsa erosion, cavitation hte kaga hkra machyi shangun ai lam ni hpe byin shangun ai.
(4) Madung hku nna, -diameter kaba ai pipeline hpe hpaw ai shaloi, pipeline hpe shawng n-gun dat ra ai, n-gun dat ai lam hta, hka n-gun kaji langai mi hpe lai di ra ai, dai hku nna, pipeline hpe loi loi hte maren mara n-gun dat lu na matu, shut{2}pe}y}off valve hpe n-htum shi yang, shut{2}y}ocessing pipeline hpe hpaw dat lu na re. lawan ai hku nbung katsi wa ai majaw byin pru wa ai, matut mahkai daw a daw hpe hkra machyi shangun ai. Raitim, ndai ladat hta, valve hpaw ai shara gaw grai kaji ai majaw, n-gun n-gun gaw, n-gun n-gun hpe jai lang ai hta grau kaba wa nna, valve hpe pat da ai shara a service life hpe grai shayawm kau ya ai.
Diameter kaba ai Globe Valve ni hpe hpaw nna pat na matu yak hkak ai lam ni hpe hparan ladat ni
(1) Shawng nnan, plunger valve hte packing valve a shingjawng ai lam hpe koi lu na matu hte switch hpe loi ai hku galaw lu na matu, bellows-hkum pat da ai globe valve hpe lata na matu hpaji jaw da ai.
(2) Valve a npawt hte dung shara hpe Stellite cemented carbide zawn re ai n-gun n rawng ai hte n-gun n rawng ai arung arai ni hte galaw ra ai;
(3) Double valve disc structure hpe lang na matu hpaji jaw da ai, dai gaw hpaw ai shara kaji ai majaw grai n-gun n rawng ai majaw, service prat hte sealing effect hpe hkra machyi shangun na re.
