Ivalve yokwandisa yinxalenye ebalulekileyo yenkqubo yefriji, ngokuqhelekileyo ifakwe phakathi kwe-cylinder yokugcina ulwelo kunye ne-evaporator.Ivalve yokwandisa yenza ifriji yolwelo kwiqondo lobushushu eliphakathi kunye noxinzelelo oluphezulu lube ngumphunga omanzi kwiqondo lobushushu eliphantsi kunye noxinzelelo oluphantsi ngokutyhala kwayo, kwaye ke ifriji ifunxa ubushushu kwi-evaporator ukuphumeza isiphumo sefriji.Ivalve yokwandisa ilawula ukuhamba kwevalve ngotshintsho lwe-superheat ekupheleni kwe-evaporator ukuthintela ukusetyenziswa ngaphantsi kwendawo ye-evaporator kunye nesiganeko sokunkqonkqoza isilinda.
Ukubeka nje, i-valve yokwandisa yenziwe ngumzimba, iphakheji yokuva ubushushu kunye ityhubhu yokulinganisa
Imeko efanelekileyo yokusebenza yevalve yokwandisa kufuneka ibe kukutshintsha ukuvuleka ngexesha langempela kwaye ulawule izinga lokuhamba kunye nokutshintsha komthwalo we-evaporator.Kodwa enyanisweni, ngenxa ye-hysteresis yokudluliselwa kobushushu kwimvulophu yokuva ubushushu, impendulo yevalve yokwandisa ihlala isiqingatha sokubetha.Ukuba sizoba umzobo wexesha lokuhamba kwevalve yokwandisa, siya kufumanisa ukuba akusiyo ijika eligudileyo, kodwa ngumgca we-wavy.Umgangatho wevalve yokwandisa ubonakaliswa kwi-amplitude yamaza.Ubukhulu be-amplitude, ukucotha ukusabela kwevalve kunye nomgangatho ombi kakhulu
