Njirimara ntinye na mmepụta nke ihe nkwado vacuum. E nwere ebe ntụgharị na usoro ọ bụla nke kwekọrọ na ogo vacuum dị iche iche na eserese ahụ, nke a na-akpọ ebe enyemaka ike kachasị, ya bụ, ebe ọdịiche nrụgide na-arụ ọrụ na diaphragm servo ruru oke ya ka ike ntinye na-abawanye. Site na nke a gaa n'ihu, mmụba nke ike mmepụta hà nhata mmụba nke ike ntinye.
Dịka QC/T307-1999 "Ọnọdụ teknụzụ maka ihe na-akwalite oghere" si kwuo, ogo oghere nke isi iyi oghere n'oge ule ahụ bụ 66.7±1.3kPa (500±10mmHg). A na-ekpebi njirimara ntinye na mmepụta nke ihe na-akwalite oghere site na usoro mgbakọ na mwepụ. Dịka ụkpụrụ ọrụ nke ihe na-akwalite oghere si dị, enwere ike ime atụmatụ paramita njirimara abụọ na usoro njirimara: ike ntinye kwekọrọ na isi ike kachasị na mkpokọta; Oke nke ike mmepụta na ike ntinye tupu isi ike kachasị, ya bụ oke ike.
