Mukusankha valavu ya dongosolo latsopano. Kusankha imodzi yomwe singathe kuthana ndi kupanikizika kwa mzere kungayambitse kuphulika kwadzidzidzi, koopsa, kuchititsa kusefukira kwa madzi, kuwonongeka kwa katundu, ndi kutsika mtengo.

Vavu ya mpira wa PVC nthawi zambiri imavotera 150 PSI (Mapaundi pa Inchi ya Square) pa 73 ° F (23 ° C). Kupanikizika uku kumachepa kwambiri pamene kutentha kwamadzimadzi kumawonjezeka, choncho nthawi zonse muyenera kuyang'ana deta ya wopanga.

Ichi ndi chimodzi mwazinthu zofunikira kwambiri zaukadaulo zomwe ndimakambirana ndi abwenzi ngati Budi. Kumvetsetsakuthamanga mlingosizongowerenga nambala; ndi kuonetsetsa chitetezo ndi kudalirika kwa makasitomala ake. Pamene gulu la Budi likhoza kufotokoza molimba mtima chifukwa a150 PSI valvendi yabwino kwa ulimi wothirira koma osati pamzere wamadzimadzi otentha, amachoka kukhala ogulitsa kukhala alangizi odalirika. Chidziwitso ichi chimalepheretsa kulephera ndikumanga ubale wautali, wopambana-wopambana womwe uli maziko a bizinesi yathu ku Pntek.

Kodi PVC idavotera kupanikizika kotani?

Makasitomala anu amaganiza kuti magawo onse a PVC ndi ofanana. Kulakwitsa koopsa kumeneku kungapangitse kuti agwiritse ntchito chitoliro chochepa chokhala ndi valve yapamwamba kwambiri, kupanga bomba la nthawi yowonongeka mu dongosolo lawo.

Kupanikizika kwa PVC kumatengera makulidwe ake (Ndandanda) ndi m'mimba mwake. Standard Ndandanda 40 chitoliro akhoza kuyambira pa 400 PSI kwa kukula ang'onoang'ono pansi 200 PSI kwa zazikulu.

Ndi kulakwitsa kofala kuganiza kuti dongosolo lavotera 150 PSI chifukwa valavu ya mpira ndi. Nthawi zonse ndimatsindika kwa Budi kuti dongosolo lonse ndi lolimba ngati gawo lofooka kwambiri. Mtengo wapatali wa magawo PVCchitolirondi yosiyana ndi valavu. Imatanthauzidwa ndi "Ndandanda," yomwe imatanthawuza makulidwe a khoma.

• Ndandanda 40:Uwu ndiye makulidwe a khoma la mipope yambiri yamadzi ndi ulimi wothirira.
• Ndandanda 80:Chitolirochi chimakhala ndi khoma lokulirapo kwambiri, motero, chiwopsezo chokwera kwambiri. Nthawi zambiri amagwiritsidwa ntchito m'mafakitale.

Chofunikira kwambiri ndichakuti kuchuluka kwa kuthamanga kumasintha ndi kukula kwa chitoliro. Nayi kufanizitsa kosavuta kwa Chitoliro 40 pa 73°F (23°C):

Dongosolo lomwe lili ndi chitoliro cha 4 ″ Sch 40 ndi mavavu athu a mpira 150 PSI ali ndi mphamvu yogwira ntchito kwambiri ya 150 PSI. Muyenera nthawi zonse kupanga gawo laling'ono kwambiri.

Kodi valavu ya mpira ndi yotani?

Mukuwona valavu yamkuwa yovotera 600 PSI ndi valavu ya PVC ya 150 PSI. Kusamvetsetsa chifukwa chake amasiyana kungapangitse kuti zikhale zovuta kulungamitsa kusankha yoyenera pantchitoyo.

Kuthamanga kwa valve ya mpira kumatsimikiziridwa ndi zinthu zake ndi kapangidwe kake. Mavavu a PVC nthawi zambiri amakhala 150 PSI, pomwe mavavu achitsulo opangidwa ndi mkuwa kapena chitsulo amatha kuvotera 600 PSI mpaka 3000 PSI.

Teremuyo"Valve ya mpira"limafotokoza ntchito, koma kukakamiza mphamvu kumachokera ku zipangizo. Ndi nkhani yachikale yogwiritsa ntchito chida choyenera pantchitoyo. Kwa makasitomala ake, gulu la Budi liyenera kuwatsogolera potengera momwe akugwiritsira ntchito.

Mfundo zazikuluzikulu Zomwe Zikutsimikizira Mayeso a Kupanikizika:

1. Zofunika Zathupi:Ichi ndiye chinthu chachikulu. PVC ndi yamphamvu, koma chitsulo ndi champhamvu. Brass ndi chisankho chofala pamadzi otentha okhalamo komanso kugwiritsa ntchito zolinga zambiri mpaka 600 PSI. Chitsulo cha kaboni ndi chitsulo chosapanga dzimbiri chimagwiritsidwa ntchito popanga mafakitale opanikizika kwambiri pomwe zovuta zimatha kukhala masauzande a PSI.
2. Seat & Seal Material:Zigawo "zofewa" mkati mwa valve, monga PTFE mipando yathu ya Pntek valves amagwiritsa ntchito, imakhalanso ndi malire ndi kutentha. Ayenera kukhala okhoza kupanga chisindikizo popanda kupundutsidwa kapena kuwonongedwa ndi kukakamizidwa kwa dongosolo.
3. Zomangamanga:Momwe thupi la valve limapangidwira limathandizanso kuti likhale ndi mphamvu.

A Ma valve a PVC150 PSI ndiyokwanira pamadzi ambiri omwe amapangidwira, monga kuthirira, maiwe, ndi mapaipi okhalamo.

Kodi ma valve othamanga ndi chiyani?

Mukuwona "150 PSI @ 73 ° F" pamagetsi a valve. Ngati mungoyang'ana pa 150 PSI ndikunyalanyaza kutentha, mutha kuyika valavu pamzere pomwe zikutsimikizika kuti zalephera.

Chiyerekezo cha kuthamanga kwa valve ndicho mphamvu yotetezeka kwambiri yogwiritsira ntchito valve yomwe imatha kupirira kutentha kwina. Kwa ma valve amadzi, izi nthawi zambiri zimatchedwa kuti Cold Working Pressure (CWP) mlingo.

Tanthauzo la magawo awiri awa—kukakamizaatkutentha—ndilo lingaliro lofunika koposa kuphunzitsa. Ubalewu ndi wosavuta: pamene kutentha kumakwera, mphamvu ya PVC imatsika, komanso kupanikizika kwake. Izi zimatchedwa "de-rating." Ma valve athu a Pntek adavotera 150 PSI pamalo okhazikika amadzi otentha. Ngati kasitomala ayesa kugwiritsa ntchito valavu yomweyi pamzere wokhala ndi madzi a 120 ° F (49 ° C), mphamvu yotetezeka yomwe angagwire ikhoza kutsika ndi 50% kapena kuposa. Wopanga aliyense wodziwika bwino amapereka tchati chotsitsa chomwe chikuwonetsa kupanikizika kovomerezeka pakutentha kwambiri. Ndinaonetsetsa kuti Budi ili ndi ma chart awa pazogulitsa zathu zonse. Kunyalanyaza ubalewu ndiye chifukwa chachikulu chakulephereka kwa zinthu mumayendedwe a mapaipi a thermoplastic.

Kodi valavu ya mpira ya Class 3000 ndi yotani?

Makasitomala amakampani akufunsa valavu ya "Class 3000". Ngati simukudziwa tanthauzo la izi, mutha kuyesa kupeza chofanana ndi PVC, chomwe kulibe, ndikuwonetsa kusowa kwaukadaulo.

Valavu ya mpira wa Class 3000 ndi valavu yothamanga kwambiri yamafakitale yopangidwa ndi chitsulo chonyezimira, yovotera kuti igwire 3000 PSI. Ili ndi gulu losiyana kwambiri ndi mavavu a PVC ndipo amagwiritsidwa ntchito ngati mafuta ndi gasi.

Funsoli limathandiza kujambula mzere womveka bwino pamchenga wogwiritsa ntchito mankhwala. Mayeso a "kalasi" (mwachitsanzo, Class 150, 300, 600, 3000) ndi gawo la muyezo wa ANSI/ASME womwe umagwiritsidwa ntchito popanga ma flange ndi ma valve, pafupifupi nthawi zonse amapangidwa ndi chitsulo. Dongosolo lowerengerali ndizovuta kwambiri kuposa kuchuluka kwa CWP pa valve ya PVC. AClass 3000 vavusikuli kokha kwa kuthamanga kwakukulu; adapangidwa kuti azitentha kwambiri komanso madera ovuta ngati omwe amapezeka m'makampani amafuta ndi gasi. Ndi mankhwala apadera omwe amawononga mazana kapena masauzande a madola. Wogula akafunsa izi, akugwira ntchito m'makampani omwe si oyenera PVC. Kudziwa izi kumathandizira gulu la Budi kuzindikira nthawi yomweyo pulogalamuyo ndikupewa kunena mawu pantchito pomwe zinthu zathu zitha kugwiritsidwa ntchito molakwika. Imalimbitsa ukatswiri podziwa zomwe inumusaterogulitsani monga momwe mukuchitira.

Mapeto

Kuthamanga kwa valve ya mpira wa PVC nthawi zambiri kumakhala 150 PSI kutentha kwa firiji, koma izi zimatsika pamene kutentha kumakwera. Nthawi zonse mufanane ndi valavu ndi kuthamanga kwa dongosolo ndi zofuna za kutentha.