Matemu uye tsananguro zvinoenderana neEN ISO 4126-1
1) Kuchengetedza vharafu
Valve iyo inongoerekana, pasina rubatsiro rweimwe simba kunze kweiyo yemvura inobatwa, inoburitsa huwandu hwemvura kuitira kudzivirira kufanotemerwa kwakachengeteka kupfuudzwa, uye iyo yakagadzirirwa kuvhara zvakare uye kudzivirira kumwe kuyerera kwemvura mushure. normal pressure conditions of service yakadzoserwa.
2) Isa kumanikidza
Kufanotemerwa kudzvanywa uko valve yekuchengetedza pasi pemamiriro ekushanda inotanga kuvhura.
Kutsunga kwekumanikidza kwakaiswa: kutanga kwekuvhurwa kwevhavhavhavha (nguva iyo mvura inotanga kubuda
kubva pavhavhavhavhavhavhavhavhavhavhavhavhavhavha yekuchengetedza, nekuda kwekubviswa kwe disc kubva pakubata nechisimbiso chechigaro chechigaro) inogona kutariswa nenzira dzakasiyana siyana (kupfachukira, pop, mabubbles), ayo anotorwa ne BESA Zvinotevera:
- kugadzika negesi (mhepo, nitrogen, helium): kutanga kwekuvhura kwevhavha yekudzivirira kunotsanangurwa
- nekuteerera kurova kwekutanga kunonzwika kwakakonzerwa
- nekufashukira kwemvura yekuyedza inobuda pachigaro chevharuvhu;
- kuseta nemvura (mvura): kutanga kwekuvhura kwevharuvhu yekudzivirira kunotariswa nekuona kuyerera kwekutanga kwakagadzikana kuyerera kwemvura inobuda pachigaro chevharuvhu.
Dzvinyiriro shall kuyerwa uchishandisa gauji yekumanikidza yekirasi yechokwadi 0.6 uye chiyero chakazara che1.25 kusvika 2 nguva yekumanikidza kuyerwa.
3) Maximum inobvumirwa kumanikidzwa, PS
Kunyanya kudzvinyirira iyo michina yakagadzirirwa sezvinotsanangurwa nemugadziri.
4) Kudzvinyirira
Kuwedzera kudzvinyirira pamusoro pekumanikidzwa kwegadziriro, iyo valve yekuchengetedza inosvika pakusimudza kunotsanangurwa nemuiti, kazhinji inoratidzwa sechikamu cheperesenti yekumanikidza.
5) Reseating pressure
Kukosha kweiyo inlet static pressure iyo iyo disc inogadzirisazve kusangana nechigaro kana iyo inosimudza inova zero.
6) Cold differential test pressure
Inlet static pressure iyo vharafu yekuchengetedza yakagadzikwa kuti itange kuvhura pabhenji.
7) Kubvisa kumanikidzwa
Dzvinyiriro inoshandiswa pakuyera vharuvhu rekuchengetedza iro rakakura kudarika kana kuenzana neredhiyo yakaiswa pamwe nekudzvanyirira.
8) Yakavakwa-kumashure kudzvinyirira
Kudzvinyirira kuripo pakubuda kwevhavhavhavha yekudzivirira kunokonzerwa nekuyerera kuburikidza nevhavha uye yekuburitsa system.
9) Superimposed back pressure
Dzvinyiriro iripo pakubuda kwevharuvhu yekuchengetedza panguva iyo mudziyo unofanirwa kushanda.
10) Simudza
Kufamba chaiko kwevharuvhu disc kure nenzvimbo yakavharwa.
11) Kuyerera nzvimbo
Minimum cross-sectional flow area (asi kwete nzvimbo yeketeni) pakati peinopinza nechigaro iyo inoshandiswa kuverenga theoretical flow capacity, pasina kubviswa kune chero chipingamupinyi.
12) Certified (discharge) kugona
Kupfuura chikamu chechiyero chakayerwa chinotenderwa kushandiswa sechinhu chakakosha pakushandiswa kwevharuvhu yekuchengetedza.
