'Vacuum leakage' em i wanpela samting we i save bagarap planti taim long ol 'industrial freeze dryers'. Em bai kamapim ol hevi olsem yusim bikpela pawa, longpela taim bilong draim na prodak bai pundaun. Static pressure-hold test em i nambawan gutpela rot bilong sekim lik pastaim long sipmen na patrol long ples bilong plent long olgeta de, we inap long skelim olgeta lik level na i no gat ol speselis lik ditekta we i gat bikpela pe.
Ful operesen prosedur: bihain long ful asembli o post-batch mentenens, pasim gut dua bilong rum. Kirapim ol 'vacuum pump' na pulim 'chamber' i go daun long makim gutpela 'vacuum'. Bihain long yu winim mak bilong 'vacuum', pasim olgeta 'vacuum pump' na pasim ol 'vacuum valve' bilong rausim olgeta 'vacuum unit'. Stat long taim na rekodim presa-rais veliu insait long rum insait long wanpela taim stret.
Ol mak bilong kisim ol yunit i no wankain long ol narapela narapela sais. Jeneral refrens bilong ol 'food-grade' indastriel 'freeze dryers': aninit long rum-temperature kondisen, bihain long ol i rausim 'vacuum group', presa-rise Liklik o wankain olsem 15Pa insait long 30 minit i min olsem gutpela wok tru; 15-40Pa presa-rise i pundaun insait long gutpela mak; presa-rais antap long 40Pa i soim olsem i gat 'leak' na ol i mas sekim 'leak-point'.
Lukluk long ol 'leak-point' we i save kamap planti taim: 1 'chamber-door silicone sealing strip' na 'sealing contact surface', sekim sapos i gat ol pipia, ol makmak, olpela na ol bruk; 2-pela 'gasket' bilong wanwan 'flange joint'; ③ ol konekta bilong paip bilong 'vacuum'; 4-pela 'sealing rings' bilong ol 'vacuum valve'; 5-pela 'observation window' na 'sensor mounting ports' long wol bilong rum.
Ol toksave: Noken mekim 'pressure-hold test' long hotpela rum bihain stret long prodaksen i ran. Wet inap long taim rum i kol olgeta i go daun long rum tempereja, bikos taim hat i go bikpela na i go daun dispela bai paulim ol riding bilong presa. Noken mekim tes aninit long strongpela win o bikpela senis long temperaja bilong ples we i save bagarapim ol risal bilong tes.
Pressure-hold test inap long skelim sapos i gat 'leakage', tasol em i no inap long makim stret ples bilong 'leak'. Sapos presa-hold risal i no wok, yusim 'spray-leak-detection' long painim ol spesifik 'leak'point. Ranim gen presa-hol tes bihain long stretim bilong konfemim kwalifait indeks. Ol presa-hold patrol i save helpim long painim ol hait 'aging-risk' bilong pasim ol komponen pastaim na stopim ol long bruk hariap taim ol i wokim.
