Wakha wazibuza ukuba zeziphi izifinyezo ezifana ne-DN, Pn, ½, Ubunzima, kunye noonobumba be-CWP kwi-valve ithetha? Ndinomdla malunga nokuphawulwa kumzimba wevalvu kunye nokuba bathini abanye oonobumba abanokuvela? Masingene ngaphakathi kwaye sihlolisise.

Iimpawu ezikwivalvu zibonisa ulwazi olubalulekileyo njengobungakanani bayo, uxinzelelo kunye neqondo lokushisa, ukwakheka kwezinto, uphawu, indlela yokuhamba, kunye neziqinisekiso. Ezi nkcukacha zibalulekile kukhetho olufanelekileyo, ufakelo, kunye nokusebenza, ukuqinisekisa ukuba ivalve isetyenziswa ngokukhuselekileyo nangokuchanekileyo.

1. UkuMakisha ubungakanani beValve:“DN” kwaye “½” Iqhezu okanye iileta kwiValve

Ubungakanani bevalve yeyona parameter isisiseko, ebonisa ibhore yegama lombhobho ehambelana nayo. Iphawulwa ngenye yeendlela ezimbini:

• DN (I-Diameter Nominal): Idayamitha yesiqhelo, iyunithi yemetric (kwiimilimitha) isetyenziswa kumazwe ngamazwe (ISO) kunye neYurophu / isiTshayina (EN/GB) imigangatho. Umzekelo, I-DN50 ithetha ukuba ivalve yeyombhobho one-a 50 mm ubukhulu becala.
• NPS (Ubungakanani bombhobho oqhelekileyo): Iyunithi yobukhosi (ngee-intshi) esetyenziswa kwimigangatho yaseMelika (ASME/ANSI). Umzekelo, 4″ okanye NPS 4 ibonisa ivalve yeyombhobho we-intshi ezi-4. Ngamaxesha athile, inani kuphela, njengokuba 4, ifakwe emzimbeni.

2. Ukumakishwa kweValve Pressure Rating: “Pn” kunye namanani kwiValve

Ukulinganiswa koxinzelelo kubonisa ubuninzi bexinzelelo lokusebenza i-valve inokumelana ngokukhuselekileyo kwiqondo lokushisa elinikeziweyo kwaye libalulekile ekukhethweni.

• ImiGangatho ye-ISO/EN/GB: Usebenzisa “Uxinzelelo olufanelekileyo” (Pn), apho iyunithi ibha. Ixabiso le-PN limele umlinganiselo woxinzelelo kwiqondo lokushisa. Imizekelo: PN16, PN40.
• I-asme/ANSI Imigangatho: Usebenzisa a “Iklasi” inkqubo, ibhalwe njengeKLASI, CL, I-IB, okanye #. Imizekelo ibandakanya UKLASI 150, 300#, okanye 150 I-IB. Oku kubonisa igophe loxinzelelo lobushushu, hayi ixabiso loxinzelelo oluqhubekayo.
• IiReyithingi zeNjongo ngokubanzi:
  • Ubunzima (Amanzi, Ioyile, Irhasi): Ibonisa ukulinganiswa koxinzelelo kwi-psi yamanzi, ioyile, kunye nenkonzo yerhasi kumaqondo obushushu akhoyo. Umzekelo: 600 Ubunzima.
  • I-CWP (Uxinzelelo Lokusebenza Olubandayo): Ukulingana kwale mihla yeWOG, ikwabonisa obona xinzelelo luphezulu luvumelekileyo kwiqondo lobushushu eliphakathi. Umzekelo: 1000 I-CWP.

3. UkuMakishwa kwezinto zeValve:

Ikhowudi yezinto eziphathekayo yenye yezona mpawu zibalulekileyo, ukucacisa izinto ezingundoqo eziqulathe uxinzelelo njengomzimba kunye nebhonethi.

• Phosa intsimbi yeCarbon: I-WCB lelona bakala lixhaphakileyo.
• Phosa iStainless Steel: CF8(ilingana ne 304 SS), CF8M(316 SS), CF3(304L), CF3M(316L).
• Intsimbi yentsimbi: WC6, WC9(intsimbi ye-chrome-moly yenkonzo yobushushu obuphezulu).
• Izinto Zomgunyathi: A105(I-carbon yensimbi), A182 F316(yenziwe ngentsimbi eshayinayo).
• Khokela Free: “LF” ithetha imathiriyeli engenalothe, kuquka ubhedu nobhedu.

4. IValve Media yokuMakisha:

Indlela yenkonzo ethile (I-E.G., “I-Acid ye-Sulfuric”) ayiphawulwa ngokubanzi. Ukufaneleka kwendawo ephakathi kugqitywa yivalveIzinto eziphathekayo. Nangona kunjalo, kwiinkonzo ezithile ezizodwa, Kusetyenziswa amanqaku athile:

• Ubunzima: ilungele iMeko yeGesi yeOyile yaManzi eqhelekileyo
• S: Umphunga ophakathi
• G: Umthombo wegesi

5. UkuMakisha uphawu lweValve:

Oku kubhekiselele kuphawu lokuthengisa lomenzi, uphawu, okanye isishunqulelo segama, esetyenziselwa ukuchonga umvelisi. Umzekelo, “I-BMAG” okanye uphawu olulodwa.

6. UkuMakishwa koMkhombandlela weValve Flow:

Kwiivalvu ezingaqhelekanga njengeevalve zeglowubhu, khangela iivalve, kunye neevalve engile, isimboli esicacileyo sotolo(→) kufuneka ifakwe okanye isitampu emzimbeni. Olu tolo lubonisa indlela echanekileyo yokuhamba kwemidiya. Ukufakela okungalunganga kunokukhokelela ekungasebenzi kakuhle okanye umonakalo.

7. UkuMakisha iziQinisekiso zeValve:

Olu phawu lubonisa ukuba isivalo siyahambelana nemigaqo nemigangatho ethile yengingqi okanye yoshishino.

• CE: Ufinyezo lwe “Ukuhambelana neYurophu,” ebonisa ukuthotyelwa kokhuseleko lwe-EU, impilo, kunye nemigangatho yokhuseleko lokusingqongileyo, efunekayo ukufikelela kwimarike eYurophu.
• Api: I-American Petroleum Institute monogram idla ngokufumaneka kwiivalvu ezisetyenziswa kwishishini leoli negesi.
• CSA: Umbutho weMigangatho yaseKhanada, isiqinisekiso esifunekayo ukuthengisa izixhobo eCanada.
• UL: IiLebhu zababhali, isiqinisekiso sisiqinisekiso sokhuseleko esibonelelwa yi-Underwriters Laboratories, inkampani yenzululwazi yokhuseleko yehlabathi. Kuthetha ukuba imveliso, icandelo, okanye inkqubo iye yavavanywa kwaye ihlangabezana nemigangatho ethile yokhuseleko.

Fumana iiVave zoMgangatho oPhezulu kwi I-BMAG.