Uyintoni umahluko phakathi kwe-American standard valves kunye ne-standard standard yaseJamani kunye ne-national standard valves?

(Umgangatho waseMelika, umgangatho waseJamani, umgangatho wesizwe) umahluko phakathi kwezivalo:

Okokuqala, ukusuka kwikhowudi esemgangathweni yelizwe ngalinye inokwahlulwa: I-GB ngumgangatho kazwelonke, umgangatho waseMelika (i-ANSI), umgangatho waseJamani (i-DIN). Okwesibini, unokwahlula kwimodeli, imodeli yevalve yesizwe ibizwa ngegama ngokungqinelana neeleta zepinyin zodidi lwevalve. Umzekelo, ivelufa yokhuseleko ngu-A, ibhabhathane ivelufa D, uvalo wevalufa G, ukujonga ivalve H, iglowubhu J, iveluji yokujija u-L, ilindle valve P, i-valve yebhola Q, umgibe S, i-valve yesango Z njalo njalo.

Akukho nkcazo ikhethekileyo phakathi kwe-American standard valve, i-valve esemgangathweni yaseJamani, i-valve esemgangathweni yesizwe, ayikho enye into ngaphandle komehluko phakathi komgangatho wemveliso kunye nenqanaba loxinzelelo, izinto zomzimba wevalve kunye nezinto zangaphakathi kulula ukuthi, ayikho enye into ngaphandle kwentsimbi, intsimbi yentsimbi, intsimbi engenasici, njl.njl. Imigangatho yaseMelika, umzekelo, isusela kwi-125LB ukuya kwi-2,500 lb (okanye i-200PSI ukuya kwi-6,000 psi). I-API esemgangathweni esemgangathweni, i-ANSI, ibizwa ngokuba yi-API, iivalves ze-ANSI. Uxinzelelo olusezantsi lwaseJamani luhlala luyi-PN10 ukuya kwi-PN320, kusetyenziswa umgangatho we-DIN; Ukuba ivalve iflange, sebenzisa umgangatho ohambelana ne-flange. Eyona migangatho iphambili yevalufa yimigangatho ye-American standard petroleum Association API, i-American standard ANSI, i-DIN eseJamani, i-JIS yaseJapan, i-GB, i-EN esemgangathweni yase-Europe, i-BS esemgangathweni ye-BS.

Ukuthetha ngokulula, iivelufa zaseMelika ziyilelwe, zenziwe, zaveliswa kwaye zavavanywa ngokwemigangatho yaseMelika. Imigangatho yemigangatho yaseJamani yenzelwe, yenziwa, yaveliswa kwaye yavavanywa ngokwemigangatho yaseJamani. Ivalve esemgangathweni kazwelonke, ngokokuyilwa komgangatho wase China, ukuvelisa, ukuvelisa, ukufumanisa kwezivalo.

Umahluko phakathi kwezi zintathu umalunga: 1, umgangatho weflange awufani; 2, ubude besakhiwo bohlukile; 3. Iimfuno zokuhlola zahlukile.

I-valve esemgangathweni yaseMelika, i-valve esemgangathweni yaseJamani, ivalve esemgangathweni yesizwe ngaphambi kofakelo kufuneka yenze uhlolo oluyimfuneko kunye nomsebenzi wovavanyo, ukwenzela ukuqinisekisa ukusetyenziswa kwesiqhelo kwimeko yokusebenza, kodwa nokwenza umsebenzi olungileyo kukhuseleko lokhuselo sebenza. Uxinzelelo lovavanyo luya kuba luxinzelelo oluphezulu lokusebenza, olona xinzelelo lusebenzayo lusezantsi kunye noxinzelelo olusebenzayo olusezantsi ngokulandelelana. Amanyathelo abuthathaka kwaye akukho kuvuza komphunga kuya kuthathwa njengokufanelekileyo.

Umgangatho wovavanyo lwe-valve olusezantsi lwaseMelika: ngamaxesha e-1.5 uxinzelelo lwegama, ixesha lovavanyo ngu-5min, ixesha lovavanyo lomzimba wevalve awophuli, akukho deformation, ivelufa ayivuzi manzi, isilinganisi soxinzelelo asiyi kuyeka ngokufanelekileyo. Emva kovavanyo lwamandla afanelekileyo, uvavanyo lokuqina lwenziwa kwakhona. Uxinzelelo lovavanyo lokuxinana lulingana noxinzelelo lwegama. Ivalve ayinakho ukuvuza ngexesha lovavanyo, kwaye igeji yoxinzelelo ayiyeki ukuze ifaneleke.