Iivalvu zesangokwayeiivalvu zeglobhuziivalvu ezisetyenziswa kakhulu. Xa ukhetha ivalvu yesango okanye ivalvu yeglobe, kunzima kubasebenzisi abaninzi ukwenza isigqibo esichanekileyo. Ngoko ke yintoni umahluko phakathi kwevalvu yeglobe kunye nevalvu yesango, kwaye ungayikhetha njani xa isetyenziswa ngokwenene?
Ngokubanzi, ngokwemigaqo yokukhetha iivalvu kuyilo lwemibhobho, iivalvu zesango zihlala zisetyenziswa kwimidiya engamanzi, kwaye iivalvu zokumisa zisetyenziswa kwimidiya yegesi. Zombini iivalvu zeglobe kunye neevalvu zesango ziivalvu zokutywina ezinyanzelekileyo. Zombini zityhala idiski kunye nesihlalo sevalvu ukwenza isitywino ngokujikeleza ivalvu, endaweni yokuxhomekeka kuxinzelelo oluphakathi ukuze kufezekiswe isitywino njengevalvu yebhola. Umahluko phakathi kwevalvu yeglobe kunye nevalvu yesango kunye nomahluko phakathi kokusetyenziswa kwazo kunye nobukhulu: Ubude besakhiwo sevalvu yesango, oko kukuthi, ubude phakathi kwemiphezulu yeflange bufutshane kunobo bevalvu yokuvala; ukuphakama kokufakelwa kunye nokuphakama kokuvula kwevalvu yokuvala kuncinci kunobo bevalvu yesango. Nangona zonke ziyimivimbo ye-angular, ukuphakama kokuvula kwevalvu yokuvala yisiqingatha kuphela sobubanzi obuqhelekileyo, ixesha lokuvula lifutshane kakhulu, kwaye ukuphakama kokuvula kwevalvu kuyafana nobubanzi obuqhelekileyo.
Umahluko kwicala lokuhamba kombane: ivalvu yesango yivalvu yokutywina eneendlela ezimbini, enokwenza ukutywinwa kuzo zombini iindlela, kwaye akukho mfuneko yecala lokufakelwa. Ivalvu yokucisha inesakhiwo esimile okwe-S. Ivalvu yokucisha iyimfuneko yecala lokuhamba. I-medium yevalvu yokucisha enobubanzi obungaphantsi kwe-DN200 iphuma ngaphantsi kwediski iye phezulu kwediski, kwaye i-medium yevalvu yokucisha enobubanzi obungaphantsi kwe-DN200 iphuma ngaphezulu kwediski iye kwivalvu. Ngaphantsi kweflap. Nangona kunjalo, ivalvu yokucisha yombane isebenzisa indlela yokungena ukusuka ngaphezulu kwe-valve clack. Ekubeni uninzi lweevalvu zokumisa luphuma ngaphantsi kweflap yevalvu ukuya phezulu, i-torque yokuvula yevalvu ingancitshiswa ngempumelelo, kwaye isiganeko se-water hammer esibangelwa kukungcangcazela kokuvula kwevalvu sinokuphetshwa. Umahluko ekuchaseni ulwelo lwesixhobo: xa sivuliwe ngokupheleleyo, yonke indlela yokuhamba kwevalvu yesango idlula ngendlela enqamlezileyo, ngaphandle kokuchasana, isixhobo asinalo ulahleko lokuhla koxinzelelo, kwaye i-coefficient yokumelana nokuhamba yi-0.08-0.12 kuphela. Ngaphezu koko, i-coefficient yokumelana nolwelo yevalvu yokuvala yi-2.4-6, ephindwe kathathu ukuya kahlanu i-coefficient yokumelana nokuhamba kwevalvu yesango. Ke ngoko, ivalvu yokuvala ayifanelekanga kwiimeko zokusebenza ezifuna ukulahleka koxinzelelo oluphakathi.
Umahluko kwisakhiwo somphezulu wokutywina: umphezulu wokutywina wevalvu yokumisa umi nkqo kumbhobho. Xa ivaliwe, ukuba ukungcola okukwindawo ephakathi kuhlala kwisitywina, xa idiski yevalvu kunye nesihlalo sevalvu yokutywina zenza isitywina, kulula ukonakalisa umphezulu wokutywina wesihlalo sevalvu kunye nevalvu yesango. Umphezulu wokutywina unefuthe lokusula xa isango lihla, kwaye indawo ephakathi ingahlanjwa, kwaye umonakalo wokungcola okuphakathi kumphezulu wokutywina umncinci kakhulu.