Isimiso Sokuqala
Ingcindezi yokukhipha ingashintshwa njalo phakathi kwenani eliphezulu levalvu yokunciphisa ingcindezi kanye nenani eliphansi ngaphakathi kobubanzi obubekiwe bamazinga okucindezela kwentwasahlobo ngaphandle kokuminyana noma ukudlidliza okungavamile;

Isimiso Sesibili
Akufanele kube khona ukuvuza kwamavalvu okunciphisa ingcindezi avaliwe kahle ngaphakathi kwesikhathi esibekiwe; kumavalvu okunciphisa ingcindezi avaliwe ngensimbi, ukuvuza akumele kube ngaphezu kuka-0.5% wokugeleza okuphezulu;

Isimiso sesithathu
Ukuphambuka kwengcindezi yokukhipha kohlobo olusebenza ngqo akudluli ku-20%, kanti uhlobo oluqhutshwa yi-pilot aludluli ku-10%, lapho izinga lokugeleza kokukhipha lishintsha;

Isimiso Sesine
Ukuphambuka kwengcindezi yokukhipha yohlobo olusebenza ngqo lapho ingcindezi yokungena ishintsha akudluli ku-10%, kanti ukuphambuka kohlobo oluqhutshwa umshayeli akudluli ku-5%;

Isimiso sesihlanu
Ingcindezi engemuva kwevalvu yokunciphisa ingcindezi ngokuvamile kufanele ibe ngaphansi kwengcindezi ephindwe izikhathi ezingu-0.5 ngaphambi kwevalvu;

Isimiso sesithupha
I-valve yokunciphisa umfutho inezinhlobo eziningi zezicelo futhi ingasetshenziswa kumusi, emoyeni ocindezelwe, igesi yezimboni, amanzi, uwoyela, kanye neminye imishini eminingi yemidiya yoketshezi kanye namapayipi. Ukumelwa kokugeleza noma ukugeleza komthamo;

Isimiso Sesikhombisa
Ingcindezi ephansi, encane, kanye nephakathi nendawo yomusi ifanelekela ivalvu yokwehlisa ingcindezi esebenza ngqo e-bellows;

Isimiso sesishiyagalombili
Umfutho ophakathi nendawo nophansi, umoya namanzi aphakathi nendawo nobubanzi obuncane kufanelekile kuma-valve okunciphisa umfutho asebenza ngqo ngefilimu encane;

Isimiso Sesishiyagalolunye
I-steam, umoya, kanye ne-water media enezingcindezi ezahlukahlukene, ububanzi, kanye namazinga okushisa konke kungasetshenziswa ne-piston pilot pressure downing valve. Ingasetshenziswa ezinhlotsheni ezahlukene ze-corrosive media uma yakhiwe ngensimbi engagqwali engamelana ne-asidi;

Isimiso seshumi
umfutho ophansi, umusi ophakathi nobubanzi obuncane, umoya, kanye nezinye izinto ezisetshenziswayo zilungele ivalvu yokunciphisa umfutho evimba umshayeli;

Isimiso Seshumi Nanye
ukucindezela okuphansi, ukucindezela okuphakathi, umusi noma amanzi amancane naphakathi ububanzi, kanye nokunye ukunciphisa ukucindezela kwefilimu yokushayela okuhambisana nemidiyaivalvu;

Isimiso seshumi nambili
80% kuya ku-105% wesilinganiso esichaziweinaniingcindezi yokungenisa kufanele isetshenziswe ukuphatha ukuguquguquka kwengcindezi yokungena kwevalvu yokunciphisa ingcindezi. Ukusebenza phakathi nezigaba zokuqala zokunciphisa ingcindezi kuzothinteka uma kudlula leli banga;

Isimiso Seshumi Nantathu
Ngokuvamile, ingcindezi ngemuva kokunciphisa ingcindeziivalvuivalvu kufanele ibe ngaphansi kwezikhathi ezingu-0.5 kuneyayikhona ngaphambi kwevalvu;

Isimiso Seshumi Nane
Izipilingi zegiya zevalvu yokwehlisa ingcindezi ziwusizo kuphela ngaphakathi kobubanzi obuthile bokucindezela kokukhipha, futhi kufanele zishintshwe uma ububanzi budluliwe;
Isimiso 15
Amavalvu okunciphisa umfutho wohlobo lwepiston yokushayela noma amavalvu okunciphisa umfutho wohlobo lwepiston yokushayela ngokuvamile asetshenziswa lapho izinga lokushisa lokusebenza lendawo yokusebenza liphezulu kakhulu;

Isimiso 16
Ngokuvamile kuyalulekwa ukusebenzisa ivalvu yokunciphisa ingcindezi yefilimu encane esebenza ngqo noma ivalvu yokunciphisa ingcindezi yefilimu encane esebenza ngomshayeli lapho into esetshenziswayo ingumoya noma amanzi (uketshezi);

Isimiso 17
Uma umusi uyindlela yokuxhumana, kufanele kukhethwe ivalvu yokunciphisa ingcindezi yepiston yomshayeli noma uhlobo lwe-pilot bellows;

Isimiso 18
Ivalvu yokunciphisa ingcindezi kufanele ibekwe epayipini elivundlile ukuze kube lula ukuyisebenzisa, ukuyilungisa, kanye nokunakekela.