Vacuum leakage gaw, bungli galaw ai freeze dryer ni hta, law dik htum hkrat sum ai lam ni hta lawm nga ai. Dai gaw, n-gun grau jai lang ai, aten galu hkyet mat ai hte arung arai ni hkrat sum mat ai zawn re ai n kaja ai akyu ni hpe shabyin ya na re. Static pressure‐hold test gaw, n-gun n rawng shi yang, hka lim ai hpe jep joi ai lam hte shani shagu hka lim ai shara hpe sin langa ai hta, manu dan ai laksan hka lim ai hpe sawk sagawn ai jak ni n lang ai sha, hka lim ai madang yawng hpe jep joi lu ai, tatut jai lang mai ai hka lim ai hpe jep chyoi ai ladat rai nga ai.
Hkum tsup ai bungli galaw ai ladat: hkum tsup ai hku hpawng de ngut ai hpang (sh) post‐batch gram lajang ngut ai hpang, nta chyinghka hpe ngang ngang pat da ra ai. Vacuum pump ni hpe hpaw nna, jahtum na vacuum hpe yaw shada na matu chamber hpe yu hkrat wa u. Set vacuum value du ai hpang, vacuum pump yawng hpe pat kau nna, vacuum valve ni hpe pat kau nna, vacuum unit ni hpe tsep kawp garan tawn da ra ai. Aten hpe hpang nna, masat da ai aten laman hta, nta kata na pressure‐rise manu hpe ka matsing da u.
Hkap la ai masat masa ni gaw n bung ai size unit ni a matu n bung ai. 15Pa hta n law ai (sh) dai hte maren sha rai yang, room‐temperature masa hta, vacuum group hpe garan tawn da ngut ai hpang, pressure rawt jat wa ai gaw, minit 30 laman hta 15Pa hta n law ai (sh) dai hte maren sha rai yang, grai kaja ai bungli galaw lu ai ngu ai lachyum rai nga ai; 15‐40Pa pressure‐rise gaw hkap la mai ai shadawn shadang kata de hkrat sum mat ai; 40Pa hta jan ai pressure‐rise gaw dan dawng ai hka pru ai hpe madun nna hka pru ai shara hpe jep joi ai lam galaw ra ai.
Chyahkring hkring hka pru ai shara ni hpe myit maju jung u: 1 nta chyinghka silicone hte pat da ai strip hte pat da ai matut mahkai shara, n-gun n rawng ai, n-gun n rawng ai, asak kaba sai & n-gun n rawng ai hpe jep yu u; Flange n-gun langai hpra a gaskets 2; vacuum pipe matut mahkai ai lam ni; vacuum valve ni hpe pat da ai ring ni; yu maram ai hkuwawt hte nta bunghku ntsa na sensor hpe jung na shara ni.
Hpaji jaw ga: Hpaga lam galaw ngut ai hpang, n-gun ja ai shara hta pressure‐hold test hkum galaw. Chamber gaw room temperature de tup hkrak katsi mat ai aten du hkra la nga u, hpa majaw nga yang, thermal jat wa ai hte shinggrup wa ai gaw pressure hti ai lam hpe galai shai kau ya na re. Nbung laru kaba (sh) n-gun ja ai ambient‐temperature galai shai ai lam npu hta chyam dinglik ai lam hpe koi ga, dai gaw chyam dinglik mahtai hpe pat shingdang kau ya ai.
Pressure‐hold test gaw, hka lim ai lam yawng nga ai kun ngu ai hpe jeyang lu ai, raitim, hka lim ai shara hpe hkrak tup n chye lu ai. Pressure‐hold mahtai n lu yang, hka pru ai shara ni hpe tam na matu spray‐leak‐detection hpe jai lang u. Hpaji rawng ai index hpe kam na matu, gram lajang ngut ai hpang, pressure‐hold test hpe bai galaw u. Regular pressure‐hold patrol gaw, sealing components ni a makoi da ai aging‐risks ni hpe tau hkrau mu tam lu hkra karum ya nna, galaw shapraw ai shaloi akajawng sha hkrat sum mat na hpe pat shingdang ya lu ai.
