Isiseko seValve

A ivalvesisixhobo sokulawula umgca wolwelo. Umsebenzi wayo osisiseko kukudibanisa okanye ukunqumla ukujikeleza kwendandatho yombhobho, ukuguqula ulwalathiso lokuhamba kwe-medium, ukulungelelanisa uxinzelelo kunye nokuhamba kwe-medium, kunye nokukhusela ukusebenza okuqhelekileyo kombhobho kunye nezixhobo.

一.Ukuhlelwa kweevalvu

Ngokusetyenziswa kunye nomsebenzi unokwahlulwa ube:

1. Ivalve yokuvala: cima okanye uqhagamshele umbhobho ophakathi. Ezinje: ivelufa yesango, ivalve yeglowubhu, ivalve yebhola, ivalve yebhabhathane, ivalve yediaphragm, ivalve yeplagi.

2. Khangela ivalve: thintela isiphakathi kumbhobho ukuba singabuyeli ngasemva.

3. Ivalve yokusabalalisa: tshintsha indlela yokuhamba ye-medium, ukusabalalisa, ukwahlula okanye ukuxuba okuphakathi. Njengeevalvu zokusasaza, imigibe yomphunga, kunye neevalvu zebhola ezintathu.

4. Ivalve yokulawula: lungisa uxinzelelo kunye nokuhamba kwendawo. Njengevalve yokunciphisa uxinzelelo, ivalve elawulayo, ivalve ye-throttle.

5. Ivalve yokhuseleko: thintela uxinzelelo oluphakathi kwisixhobo ekugqithiseni ixabiso elichaziweyo, kwaye unikeze ukhuseleko lokhuseleko olugqithisileyo.

二. Iiparamitha ezisisiseko zeivalve

1. Idayamitha yegama levalve (DN).

2. Uxinzelelo oluqhelekileyo lwevalve (PN).

3. Uxinzelelo kunye nomgangatho wokushisa we-valve: Xa ukushisa okusebenzayo kwe-valve kudlula ubushushu bereferensi yoxinzelelo lwegama, uxinzelelo oluphezulu lomsebenzi kufuneka luncitshiswe ngokufanelekileyo.

4. Ukuguqulwa kweyunithi yoxinzelelo lwevalve:

5. Indlela esebenzayo yeivalve:

Izivalo zemizi-mveliso zisetyenziswa kwipetroleum, kushishino lweekhemikhali, kwisinyithi, amandla ombane, amandla enyukliya kunye namanye amashishini. Amajelo osasazo adlula kuwo aquka iigesi (umoya, umphunga, iammonia, irhasi yamalahle, igesi yepetroleum, igesi yendalo, njl.); ulwelo (amanzi, i-ammonia elulwelo, ioli, iiasidi, iialkali, njl. njl.). Eminye yayo idla ngokutya okwemipu, yaye eminye iyingozi kakhulu.