Imigaqo yokukhetha iivalvu kunye namanyathelo okukhetha iivalvu

Umgaqo wokukhetha ivalvu
(1) Ukhuseleko kunye nokuthembeka. Iimfuno zemveliso yePetrochemical, isikhululo samandla, i-metallurgy kunye nezinye iimboni ukuze kuqhubeke ukusebenza ngomjikelo oqhubekayo, ozinzileyo, nowokuqhubeka. Ke ngoko, ivalvu efunekayo kufuneka ibe nokuthembeka okuphezulu, into enkulu yokhuseleko, ayinakubangela ukhuseleko olukhulu lwemveliso kunye nokulimala komntu ngenxa yokusilela kwevalvu, ukuhlangabezana neemfuno zokusebenza kwexesha elide kwesixhobo. Ukongeza, nciphisa okanye uphephe ukuvuza okubangelwa ziivalvu, yenza umzi-mveliso ococekileyo, ophucukileyo, ukuphunyezwa kwempilo, ukhuseleko, kunye nolawulo lokusingqongileyo.

(2) Ukuhlangabezana neemfuno zemveliso yenkqubo. Ivalvu kufuneka ihlangabezane neemfuno zokusebenzisa uxinzelelo oluphakathi, olusebenzayo, ubushushu bokusebenza kunye nokusetyenziswa, nto leyo ekwayimfuneko esisiseko yokukhetha ivalvu. Ukuba ivalvu iyimfuneko ukukhusela uxinzelelo olungaphezulu kunye nokukhupha i-medium engaphezulu, ivalvu yokhuseleko kunye nevalvu yokugcwala kufuneka kukhethwe; ukuthintela ivalvu yokubuya okuphakathi ngexesha lenkqubo yokusebenza, yamkelaivalvu yokujonga; susa ngokuzenzekelayo amanzi abandayo, umoya kunye nenye igesi engabandakaliyo eveliswa kumbhobho womphunga kunye nezixhobo, ngelixa kuthintela ukuphuma komphunga, kufuneka kusetyenziswe ivalvu yokukhupha amanzi. Ukongeza, xa i-medium irhabaxa, kufuneka kukhethwe izixhobo ezifanelekileyo zokumelana nokugqwala.

(3) Ukusebenza, ukufakelwa kunye nokugcinwa okulula. Emva kokuba ivalvu ifakiwe, umqhubi kufuneka akwazi ukubona ngokuchanekileyo icala levalvu, uphawu lokuvula kunye nesibonakaliso sesalathiso, ukuze akwazi ukujongana neempazamo ezahlukeneyo ezingxamisekileyo. Kwangaxeshanye, ulwakhiwo lohlobo lwevalvu olukhethiweyo kufuneka lube lula kangangoko kunokwenzeka, lube lula ukufakelwa kunye nokugcinwa.

(4) Uqoqosho. Phantsi kwengcamango yokuhlangabezana nokusetyenziswa okuqhelekileyo kwemibhobho yenkqubo, iivalvu ezinexabiso eliphantsi lokuvelisa kunye nesakhiwo esilula kufuneka zikhethwe kangangoko kunokwenzeka ukunciphisa iindleko zesixhobo, ukuphepha inkcitho yezinto eziluhlaza zeevalvu kunye nokunciphisa iindleko zokufakela kunye nokugcinwa kweevalvu kwinqanaba elilandelayo.

Amanyathelo okukhetha ivalvu
1. Misela imeko yokusebenza yevalvu ngokwendlela esetyenziswa ngayo ivalvu kwisixhobo okanye kwipayipi yenkqubo. Umzekelo, indawo yokusebenza, uxinzelelo lokusebenza kunye nobushushu bokusebenza, njl.

2. Misela inqanaba lokusebenza kokutywina kwevalvu ngokwendlela yokusebenza, indawo yokusebenza kunye neemfuno zomsebenzisi.

3. Misela uhlobo lwevalvu kunye nemo yokuqhuba ngokwenjongo yevalvu. Iintlobo ezifanaivalvu yebhabhathane ekwaziyo ukumelana nayo, ivalvu yokujonga, ivalvu yesango,ivalvu yokulinganisela, njl. Imo yokuqhuba efana ne-worm wheel worm, umbane, umoya, njl.

4. Ngokwe parameter eqhelekileyo yevalvu. Uxinzelelo oluqhelekileyo kunye nobukhulu obuqhelekileyo bevalvu kufuneka zihambelane nombhobho wenkqubo ofakiweyo. Ezinye iivalvu zimisela ubungakanani obuqhelekileyo bevalvu ngokwesantya sokuhamba okanye ukukhutshwa kwevalvu ngexesha elilinganisiweyo le-medium.

5. Misela uhlobo loqhagamshelo lomphezulu wesiphelo sevalvu kunye nombhobho ngokweemeko zokusebenza zangempela kunye nobukhulu obuqhelekileyo bevalvu. Ezifana neflange, ukuwelda, ikliphu okanye umsonto, njl.

6. Misela ulwakhiwo kunye nohlobo lwevalvu ngokwendawo yokufakela, indawo yokufakela, kunye nobukhulu bevalvu. Ezifana nevalvu yesango le-dark rod, ivalvu ye-angle globe, ivalvu yebhola esisigxina, njl.

Ngokweempawu zendlela ephakathi, uxinzelelo lokusebenza kunye nobushushu bokusebenza, kukhetho oluchanekileyo nolufanelekileyo lwegobolondo yevalvu kunye nezixhobo zangaphakathi.