Izinto Zensimbi Engagqwali Zezingxenye Zevalvu Nephampu

Isingeniso

Izinto zensimbi engagqwali zezingxenye ze-valve nephampuzikhethwa lapho abathengi bedinga ukumelana nokugqwala, amandla omshini, ukusebenza kahle kwemishini, ukumelana nokuguguleka, ubuqotho bengcindezi kanye nokuphila isikhathi eside kwemishini yokulawula uketshezi. Imikhiqizo evamile yensimbi engagqwali esetshenziselwa ama-valve namaphampu ifaka phakathi ibha eyindilinga, ibha eyenziwe ngobumba, ipuleti, ipayipi, ithubhu, ucingo, isitokwe seshaft, izinto zokubopha, ama-flange, izinto zokufaka kanye nezimbobo ezenziwe ngomshini ezenziwe ngokwezifiso.

Abakhiqizi bama-valve namaphampu basebenzisa insimbi engagqwali emikhakheni yama-valve, iziqu, amabhola, ama-disc, izihlalo, imiphini, ama-impeller, imikhono yephampu, izinamathiselo, iziphethu, ama-gasket, izixhumi, izindawo zokubopha kanye nezingxenye zokuvala. Izinto ezifanele kufanele zikhethwe ngokuya ngokulingana, ingcindezi, izinga lokushisa, izinga le-chloride, isimo sokuguguleka, imfuneko yomshini wokugaya, imfuneko yokushisela, ubulukhuni, uhlobo lwesitifiketi kanye nobubanzi bokuhlola.

Izimo Zokusebenza Zezingxenye Zevalvu Nephampu

Amavalvu namaphampu asebenza ezindaweni ezahlukene, okuhlanganisa amanzi, umusi, uwoyela, igesi, amakhemikhali, ama-asidi, amanzi olwandle, imithombo yokudla kanye noketshezi olunomfutho ophezulu. Ingxenye ngayinye inezidingo zezinto ezihlukile. Isibonelo, umzimba wevalvu udinga ukuqina komfutho kanye nokumelana nokugqwala, kuyilapho isiqu noma umgodi ungadinga amandla, ukunemba kanye nokumelana nokuguguleka.

Ingxenye	Ifomu Lomkhiqizo Ongagqwali Ovamile	Isidingo Sezinto Ezibalulekile
Umzimba weValve kanye neBonnet	Ipuleti, ibha eyakhiwe, ipayipi, i-flange, ukusakaza noma okungenalutho okwenziwe ngomshini	Ukumelana nokucindezela, ukumelana nokugqwala, ukushibilika kanye nokulandelela isitifiketi.
Isiqu seValvu	Ibha eyindilinga, ibha yomhlabathi, isitokhwe somgodi kanye nebha eyenziwe ngobumba	Ukuqonda, amandla, ukuqeda ubuso, ubulukhuni kanye nokumelana nokuguguleka.
Ibhola le-Valve / Idiski / Isihlalo	Ibha eyindilinga, ipuleti, isitokwe esingenalutho esenziwe ngomshini kanye nesinobunono	Ukukwazi ukusebenza kahle, ukupholisha ubuso, ukusebenza kahle kokuvala kanye nokumelana nokugqwala.
Umgodi Wokupompa	Ibha eyindilinga, ibha ehlutshiwe, ibha ephendukile, ibha egayiwe kanye nebha eyenziwe ngobumba	Amandla aphezulu, ukuqondile, ukugxila, ukumelana nokukhathala kanye nokumelana nokugqwala.
I-Impeller kanye ne-Pump Sleeve	Ipuleti, ibha, isitokwe sezingxenye ezingenalutho ezenziwe ngomshini	Ukumelana nokugqwala, ukumelana nokuguguleka, ibhalansi kanye nokuqina komshini.
Izibambo Neziphethu	Ibha eyindilinga, ucingo, ucingo lwesipilingi kanye nesitoko se-fastener	Amandla, ubulukhuni, ukunwebeka, ukumelana nokugqwala kanye nokulawula ubukhulu.

Izinzuzo Zezinto Ezibalulekile Zensimbi Engagqwali Yamavalvu Namaphampu

Insimbi engagqwali isetshenziswa kabanzi ekukhiqizweni kwama-valve namaphampu ngoba inikeza ibhalansi esebenzayo phakathi kokumelana nokugqwala, amandla omshini, ukusebenza kahle kwemishini, inhlanzeko, ikhwalithi yendawo kanye nokutholakala kwayo. Imindeni ehlukene yensimbi engagqwali ingakhethwa ngokwezinga lokusebenza elihlukile.

•Ukumelana nokugqwala:kufanelekile emanzini, umusi, amakhemikhali, uketshezi lwasolwandle kanye nezinqubo eziningi lapho kukhethwa ibanga elifanele.

•Ukusebenza kahle kwemishini:Imigoqo yensimbi engagqwali kanye nezimbobo ezibunjiwe zingafakwa ngomshini zibe yiziqu, imiphini, amabhola, amadiski kanye nezingxenye zepompo.

•Izinketho zamandla:i-martensitic, i-precipitation-hardening, i-duplex kanye ne-super duplex grades zinikeza amandla aphezulu ezingxenyeni ezilayishiwe.

•Ukulawula ukuqeda kobuso:Amabha aphendukile, aqoshiwe kanye napholishiwe asekela izingxenye zokuvala nokujikeleza.

•Ukushibilika:Amabanga e-austenitic kanye ne-duplex angasetshenziswa ekuhlanganisweni kwama-valve namaphampu okwenziwe lapho kulandelwa izinqubo ezifanele zokushisela.

•Ukulandelelwa:imikhiqizo yensimbi engagqwali ingahlinzekwa ngemibiko yokuhlolwa kwe-MTC, PMI, UT, ubulukhuni, ukuthambekela kanye nobukhulu.

Amabanga Ensimbi Engagqwali Anconyiwe Ezingxenyeni Zevalvu Nephampu

Ibanga	Amafomu Omkhiqizo Ovamile	Ukusetshenziswa Okuvamile Kwevalvu/Iphampu	Inothi Lokukhetha
304 / 304L	Ibha, ipuleti, ipayipi, ucingo, izinto zokufakelwa kanye nezingxenye ezifakwe ngomshini	Imizimba yamavalvu ejwayelekile, izindawo zokufutha, izinto zokufaka kanye nezingxenye ezingagqwali kakhulu	Isebenza kahle kakhulu ekuhlinzekeni ngezinsizakalo ezijwayelekile, kodwa ayilungele imidiya ene-chloride ephezulu.
316 / 316L	Ibha eyindilinga, ipayipi, ithubhu, ipuleti, ucingo, ama-flange kanye nezinto zokufaka	Amaphampu amakhemikhali, ama-valve olwandle, ukwelashwa kwamanzi, imishini yokudla kanye neyokucubungula	Ukumelana ne-chloride okungcono kuno-304; kusetshenziswa kabanzi ezingxenyeni zevalvu nephampu.
321/347	Ipayipi, ithubhu, ipuleti, ibha kanye nezinhlangano ezihlanganisiwe	Izingxenye zevalvu nezipompo ezishisa kakhulu, indawo yokuhluza kanye nensizakalo ye-petrochemical	Izinsimbi ezingagqwali eziqinisiwe ezifanelekile ezimweni zokushisa okuphezulu kanye nokushisela.
410/420	Ibha, induku, ucingo, isitokwe somgodi kanye nezingxenye ezifakwe umshini	Iziqu zamavalvu, imiphini, izihlalo, amadiski, izingxenye ezigugile kanye nezingxenye eziqina	Ukuqina okuphezulu kungenzeka ngemva kokwelashwa ngokushisa; ukumelana nokugqwala kungaphansi kuka-316L.
431	Ibha eyindilinga, isitokwe somgodi kanye nezingxenye ezifakwe umshini	Imiphini yokupompa, iziqu zamavalvu, imiphini yasolwandle kanye nezingxenye eziqinile ezijikelezayo	Insimbi engagqwali ye-martensitic enamandla aphezulu enokumelana nokugqwala okungcono kune-410 ezimweni eziningi.
17-4PH / 630	Ibha, ibha eyenziwe ngomshini, ipuleti kanye nezikhala ezifakwe ngomshini ngokunemba	Iziqu zamavalvu ezinamandla aphezulu, imiphini, izikhonkwane, izingxenye zephampu kanye nezingxenye zokunemba	Izimo eziphathwa ngokushisa njenge-H900, H1025 kanye ne-H1150 kufanele zichazwe ngokucacile.
I-Duplex engu-2205	Ibha, ipayipi, ithubhu, ipuleti, izinto zokufaka, ama-flange kanye ne-forgings	Izakhi zamakhemikhali, amanzi olwandle, ogwini lolwandle, ivalvu enamandla aphezulu kanye nephampu	Ibhalansi enhle yamandla, ukumelana nokugqwala kanye nezindleko.
2507 / S32760	Ibha, ipuleti, ipayipi, izinto zokufaka, ama-flange kanye nezingxenye ezifakwe ngomshini	Amanzi olwandle aqinile, angaphansi kolwandle, asogwini kanye nezingxenye ze-valve kanye nephampu	Amandla aphezulu kanye nokumelana nemigodi kuno-2205 ukuze uthole isevisi edinga kakhulu.

Ukukhethwa Kwezinto Ngokohlobo Lwezinto

Uhlobo Lwezinto	Isiqondiso Sebanga Elivamile	Isheke Lomthengi Oyinhloko
Umzimba weValve	304L, 316L, 321, 347, 2205, 2507	Isilinganiso sokucindezela, i-corrosion medium, i-welding kanye nesidingo se-NDT.
Isiqu seValvu	410, 420, 431, 17-4PH, 316L, amamaki amabili	Amandla, ubulukhuni, ukuqondile, ukuqeda ubuso kanye nokumelana nokugqwala.
Ibhola le-Valve / iDiski	316L, 420, 17-4PH, 2205, 2507	Ukunemba kwemishini, indawo yokuvala, ubulukhuni kanye nokupholisha.
Umgodi Wokupompa	431, 17-4PH, 316L, 2205, 2507	Ukuqina, amandla okunamathela, ukumelana nokukhathala kanye nokuqeda phansi.
Impeller	316L, 2205, 2507, 904L noma izinga elichazwe yiphrojekthi	Ukugqwala, ukuguguleka, ibhalansi, indlela yokukhipha/yokubumba kanye nokuqina komshini.
Izibambo	304, 316, 17-4PH, 2205, 2507, A453 Gr.660	Amandla okunamathela, ikhwalithi yentambo, ubulukhuni kanye nokushisa kwesevisi.

Ukukhethwa Kwefomu Lomkhiqizo: Ibha, Ipayipi, Ipuleti kanye Nocingo

Izingxenye zevalvu nephampu zingadinga izinhlobo ezahlukene zomkhiqizo wensimbi engagqwali kuye ngendlela yokukhiqiza. Ibha isetshenziselwa imiphini neziqu ezenziwe ngomshini. Ipuleti lisetshenziselwa izindawo zokubopha nezingxenye ezenziwe. Ipayipi nethubhu kusetshenziselwa izindlela zokugeleza kanye nezinhlelo zokucindezela. Intambo isetshenziselwa iziphethu, i-mesh, izivalo kanye nezingxenye ezincane ezakhiwe.

Ifomu Lomkhiqizo	Ukusetshenziswa Okuvamile Kwevalvu/Iphampu	Ukugxila Kwemininingwane
Ibha Eyindilinga Yensimbi Engagqwali	Iziqu, imiphini, amabhola, amadiski, imikhono, izikhonkwane kanye nezimbobo ezifakwe ngomshini	Ububanzi, ukubekezelelana, ukuqondile, ubuso, i-UT, i-PMI kanye ne-MTC.
Ibha Engagqwali Ehlanganisiwe	Izingxenye ezinkulu zamavalvu, imiphini yokupompa, imikhono esindayo kanye nezingxenye ezinomfutho ophezulu	Isilinganiso sokwakha, ukwelashwa kokushisa, i-UT, izakhiwo zemishini kanye nesibonelelo somshini.
Ipuleti Lensimbi Engagqwali	Izimbozo ezenziwe ngendwangu, izembozo, amapuleti okusekela kanye nezingxenye ezisikiwe ezenziwe ngokwezifiso	Ubukhulu, ukuba yisicaba, ubuso, ukubekezelela ukusika, i-UT kanye nokulandeleka kwesitifiketi.
Ipayipi/Ipayipi Lensimbi Engagqwali	Izindlela zokugeleza, ukuxhumeka kwephampu, izandiso zamavalvu kanye nezinhlelo zokucindezela	I-OD, udonga, ishejuli, ukuhlolwa kwengcindezi, i-NDT kanye nokuhlanzeka kwangaphakathi.
Intambo Yensimbi Engagqwali	Izipilingi, izingxenye zokugcina, i-mesh, izivalo, izihlungi kanye nezingxenye ezakhiwe	Ububanzi bentambo, amandla okunamathela, isimo sekhoyili, ubuso kanye nesimo sokushisa.

Imikhawulo kanye Nezingozi Zokukhetha Izinto

Ibanga lensimbi engagqwali elisebenza kahle emzimbeni we-valve lingase lingafaneleki emshafini wephampu, ibhola lokuvala noma isihlalo esigugile kakhulu. Abathengi kufanele babuyekeze indlela eqondile yokusebenza kwesevisi kanye nomsebenzi womshini wengxenye ngayinye ngaphambi kokuvuma ukushintshwa kwezinto.

• Ama-304/304L angase anganele ekusetshenzisweni kwe-chloride, amanzi olwandle noma amaphampu amakhemikhali.

• I-316L ithuthukisa ukumelana nokugqwala kodwa ingase inganikeli amandla noma ubulukhuni obanele beziqu kanye nemigodi.

• I-410/420 ingaqiniswa, kodwa ukumelana nokugqwala kuphansi kunezinsimbi ezingagqwali ze-austenitic.

• Amandla angu-17-4PH ancike kakhulu esimweni sokwelashwa kokushisa, ngakho-ke i-H900, i-H1025 noma i-H1150 kumele icaciswe ngokucacile.

• Izinsimbi ezingagqwali ze-Duplex kanye ne-super duplex zidinga ukushisela okulungile kanye nokulawula ukufakwa kokushisa.

• Isevisi emuncu, izinga lokushisa eliphezulu, amanzi olwandle kanye nemidiya erhabaxa kungadinga ukubuyekezwa okukhethekile, ukuhambisana ne-NACE noma izinto ze-alloy eziphakeme.

Amazinga, Izitifiketi kanye Nokuhlolwa

Izinto zevalvu kanye nephampu kufanele zinikezwe imibhalo ecacile yokulandelela kanye nokuhlolwa. Izidingo ziyahlukahluka kuye ngohlobo lomkhiqizo, ibanga, isicelo kanye nencazelo yamakhasimende.

Idokhumenti / Ukuhlolwa	Lokho Okukuqinisekisayo	Isikhathi Sokucela
I-EN 10204 3.1 MTC	Ibanga, inombolo yokushisa, ikhemistri, izakhiwo zemishini, okujwayelekile kanye nokulandeleka	Kunconywa kakhulu kuma-oda amaningi e-valve kanye nezinto zokufaka iphampu.
Umbiko we-PMI	Ukuhlonza izinto ezinhle kanye nokuqinisekiswa kwe-alloy	Iwusizo ekuthunyelweni okuxubile kanye nezingxenye ezibalulekile.
Umbiko we-UT	Ukuqina kwangaphakathi kwebha, ibha noma ipuleti elihlanganisiwe	Isicelo semigoqo, izikhala ezibunjiwe, izingxenye ezinomfutho ophezulu kanye nobubanzi obukhulu.
Umbiko Wokuqina	Isimo esiphathwe ngokushisa kanye nokulawulwa kwempahla okuhlobene nokuguguleka	Kubalulekile ezingxenyeni ezingu-410, 420, 431 kanye no-17-4PH.
Umbiko Wezilinganiso	Ububanzi, ubude, ukujiya, ukubekezelelana, ukuqondile kanye nemvume yokulungisa	Iwusizo esitokweni somgodi, ibha yokunemba kanye nezingxenye ezisikiwe ngobukhulu.
Ukuhlolwa kwe-PT / RT / Hydrostatic	Amaphutha angaphezulu, ikhwalithi yokushisela noma ubuqotho bengcindezi	Isicelo sezingxenye ezishisiwe, eziqukethe ingcindezi noma ezenziwe.

Indlela Yokuchaza Insimbi Engagqwali Yezingxenye Zevalvu Nephampu

I-RFQ ephelele kufanele ichaze kokubili izinto kanye nomsebenzi wengxenye. Lokhu kusiza umhlinzeki ukuthi ancome izinga elifanele, ifomu lomkhiqizo kanye nephakheji yokuhlola.

✅ Uhlobo lwengxenye: umzimba we-valve, isiqu, ibhola, idiski, isihlalo, umgodi wepompo, impeller, isilikhi, i-fastener, intwasahlobo noma i-blank ekhiqizwe ngomshini.

✅ Ibanga: 304L, 316L, 321, 347, 410, 420, 431, 17-4PH, 2205, 2507 noma ibanga elichazwe yiphrojekthi.

✅ Ifomu lomkhiqizo: ibha eyindilinga, ibha eyakhiwe, ipuleti, ipayipi, ishubhu, ucingo, i-flange, ukulingana noma okungenalutho okusikiwe ngosayizi.

✅ Okujwayelekile: ASTM, ASME, EN, DIN, JIS, NACE, umdwebo wamakhasimende noma imininingwane yephrojekthi.

✅ Usayizi: ububanzi, ubude, ubukhulu bodonga, ubukhulu bepuleti, ububanzi bentambo, ukubekezelelana kanye nemvume yokulungisa.

✅ Ubuso: mnyama, ucwecwe, ucwecwe, uphendulwe, ugayiwe, upholishwe, ufakwe ngomshini noma uvikele ubuso.

✅ Isimo sesevisi: amanzi, umusi, uwoyela, igesi, amakhemikhali, amanzi olwandle, i-asidi, i-chloride, izinga lokushisa eliphezulu noma indawo yokukhwehlela.

✅ Ukuhlolwa: I-PMI, i-UT, i-PT, i-RT, ubulukhuni, ukuthambekela, umthelela, ukuhlolwa kwe-hydrostatic noma ukuhlolwa kobukhulu.

✅ Isitifiketi: EN 10204 3.1, 3.2, ukuhlolwa komuntu wesithathu, isitatimende se-NACE noma incwadi yedatha yephrojekthi.

Amaphutha Avamile Omthengi

Ukusebenzisa ibanga elilodwa kuzo zonke izingxenye:Umzimba wevalvu, isiqu, isihlalo kanye ne-fastener kungadinga amazinga ahlukene ngoba imisebenzi yazo ihlukile.

Ukukhetha i-316L yemishayo eguga kakhulu:I-316L inokumelana okuhle nokugqwala kodwa ingase inganikeli ubulukhuni noma amandla anele kwezinye izinhlelo zokusebenza ze-shaft kanye ne-stem.

Ukungacacisi ukwelashwa kokushisa kwe-17-4PH:Izakhiwo ezingu-17-4PH zincike esimweni esifana ne-H900, H1025 noma i-H1150. Isimo kumele sibhalwe ku-oda lokuthenga.

Ukunganaki ukuqeda kobuso:Iziqu zamavalvu, imiphini yepompo kanye nezindawo zokuvala zingadinga izindawo eziphendulwe, ezigayiwe noma ezipholishiwe.

Ukukhohlwa i-UT noma i-PMI:Imigoqo ebucayi eyenziwe ngobumba, imigoqo kanye nokuthunyelwa okuxubile kufanele kuqinisekiswe ukuze kugwenywe amaphutha angaphakathi noma ukuxubana kwezinto.

Ukufaka esikhundleni samabanga amabili ngaphandle kokubuyekezwa kokushisela:Izinsimbi ezingagqwali ze-Duplex kanye ne-super duplex zidinga inqubo efanele yokushisela kanye nokulawulwa kwebhalansi ye-ferrite.

Ukuqhathanisa intengo ngaphandle kobubanzi besitifiketi:I-MTC, i-PMI, i-UT, ubulukhuni, ukuhlolwa komuntu wesithathu kanye nokupakisha okukhethekile kungathinta izindleko kanye nesikhathi sokukhokha.

Imibuzo Evame Ukubuzwa

Iyiphi insimbi engagqwali esetshenziselwa izingxenye ze-valve?

Izinsimbi ezivamile ezingagqwali zezingxenye zamavalvu zifaka phakathi i-304L, i-316L, i-410, i-420, i-431, i-17-4PH, i-2205 kanye ne-2507. Izinga elihle kakhulu lincike ekutheni ingxenye iyisidumbu, isiqu, ibhola, idiski, isihlalo, i-fastener noma ingxenye equkethe ingcindezi.

Iyiphi insimbi engagqwali esetshenziswa kuma-pump shaft?

Amashafu ephampu avame ukusebenzisa insimbi engagqwali engu-431, 17-4PH, 316L, 2205 noma 2507 kuye ngamandla, ukumelana nokugqwala, ukunemba, ubulukhuni kanye nezidingo zesevisi.

Ingabe i-316L ifanele izingxenye ze-valve nephampu?

I-316L ifanelekela izingxenye eziningi zamavalvu nezamaphampu kumakhemikhali, olwandle, ukwelashwa kwamanzi kanye nensizakalo evamile yokumelana nokugqwala. Kodwa-ke, ukusetshenziswa kwe-chloride okugugile kakhulu, okunamandla aphezulu, okushisa okuphezulu noma okunamandla kungadinga amanye amazinga.

Kufanele kukhethwe nini i-17-4PH?

I-17-4PH kufanele ikhethwe uma izingxenye zevalvu noma zephampu zidinga amandla aphezulu, ubulukhuni obulawulwayo, ukumelana okuhle nokugqwala kanye nezakhiwo zemishini eziphathwa ngokushisa. Isimo esidingekayo, njenge-H900, H1025 noma i-H1150, kufanele sichazwe.

Kufanele kusetshenziswe nini insimbi engagqwali ye-duplex kuma-valve namaphampu?

Insimbi engagqwali ye-Duplex efana ne-2205 kufanele icatshangelwe lapho kudingeka amandla aphezulu kanye nokumelana nokugqwala kwe-chloride okungcono kunalokho okunganikezwa yi-316L. Amazinga e-Super duplex afana ne-2507 asetshenziselwa amanzi olwandle aqinile noma isevisi yolwandle.

Yimaphi amadokhumenti okufanele anikezwe nge-valve yensimbi engagqwali nezinto zokupompa?

Imibhalo ejwayelekile ifaka phakathi i-EN 10204 3.1 MTC, ukwakheka kwamakhemikhali, izakhiwo zemishini, inombolo yokushisa, umbiko wobukhulu, umbiko we-PMI, umbiko we-UT, umbiko wobulukhuni kanye nombiko wokuhlola womuntu wesithathu uma kudingeka.

Yini okufanele abathengi bayifake ku-RFQ yezinto zokufaka ama-valve kanye nephampu?

Abathengi kufanele bafake uhlobo lwengxenye, ibanga, izinga elijwayelekile, uhlobo lomkhiqizo, usayizi, ukubekezelelana, ukuqeda kwendawo, indlela yesevisi, izinga lokushisa, ingcindezi, imfuneko yokuhlola, uhlobo lwesitifiketi, ubuningi kanye nembobo yokuya kuyo.

Imikhiqizo Yensimbi Engagqwali Ehlobene

Umkhiqizo Ohlobene	Ukusetshenziswa Kokuthengwa Kwempahla
Ibha Eyindilinga Yensimbi Engagqwali	Ibha eyindilinga yeziqu zamavalvu, imiphini yepompo, amabhola, amadiski, imikhono, izikhonkwane kanye nezimbobo ezifakwe ngomshini.
Ipayipi Lensimbi Engagqwali	Ipayipi lokuxhuma ama-valve, izinhlelo zephampu, amapayipi okucindezela kanye nemishini yokucubungula.
Ipuleti Lensimbi Engagqwali	Ipuleti lezindawo zokubopha ezenziwe ngobuciko, izingxenye zamavalvu, izembozo zamaphampu, amapuleti okusekela kanye nezingxenye ezisikiwe ngokwezifiso.
Intambo Yensimbi Engagqwali	Ucingo lweziphethu, i-mesh, izivalo, izihlungi, izingxenye zokugcina kanye nezingxenye zevalvu noma zephampu ezakhiwe.
Insimbi Engagqwali Ephindwe Kabili	Izinto ze-Duplex kanye ne-super duplex ze-valve enamandla aphezulu, engamelani ne-chloride kanye nesevisi yokupompa.
Insimbi Engagqwali Yomhlahlandlela Wamafutha Negesi	Umhlahlandlela wokukhetha ibha yensimbi engagqwali, amapayipi kanye nocingo lwezindawo zikawoyela negesi.

Isiphetho

Izinto zensimbi engagqwali zezingxenye ze-valve nephampu kufanele zikhethwe ngokusebenza kwengxenye, indlela yokusebenza, isidingo samandla, indawo yokugqwala, ukuqeda kwendawo kanye nobubanzi bokuhlola. Ama-304L nama-316L avame ukusetshenziswa ezingxenyeni ezijwayelekile ezingagqwali, kuyilapho ama-410, 420, 431 kanye nama-17-4PH asetshenziswa lapho kudingeka ubulukhuni noma amandla aphezulu. Ama-Duplex nama-super duplex grade akhethwa ezindaweni ezidinga kakhulu i-chloride, amanzi olwandle kanye nolwandle.

Ukuze kuthengwe okuthembekile, abathengi kufanele bacacise ibanga, izinga elijwayelekile, uhlobo lomkhiqizo, usayizi, ukubekezelelana, isimo somphezulu, ukwelashwa kokushisa, isimo sesevisi, isidingo sokuhlolwa kanye nohlobo lwesitifiketi. Imininingwane ecacile isiza ukuvimbela ukukhethwa kwezinto okungalungile, izinkinga zomshini, ukwehluleka kokugqwala kanye nezingxabano zokulethwa.