Nthawi zambiri timagwiritsa ntchito Pn, CLass, ndiyo njira yopanikizira, kusiyana ndikuti amaimira kukakamizidwa pansi pazofananira kutentha ndikosiyana, Pn European system ikutanthauza kuponderezana kofananira ndi 120 ℃, pomwe muyezo waku America umatanthawuza kukakamiza kofananira pa 425.5 ℃. Chifukwa chake, pakusinthana kwaukadaulo sikungokhala kosintha kwachangu, monga CLass300 # kungokhala ndi kukakamizidwa kutembenuka kuyenera kukhala 2.1 Mpa, koma ngati mungaganizire kugwiritsa ntchito kutentha, kuthamanga kwake kofanana kudzauka, malinga ndi kutentha kwakuthupi mayeso ndi ofanana ndi 5.0 Mpa.
Pali mitundu iwiri ya valavu: imodzi ndi Germany (kuphatikiza China) ngati woimira kutentha kwabwino (China ndi madigiri 100, Germany ndi madigiri 120) kukakamizidwa kogwira ntchito ngati chikhazikitso cha "kuthamanga kwa dzina". Imodzi ndiyo "kutentha kwazomwe zimayimiriridwa" ndi United States, yomwe idakhazikitsidwa potengera kuthamanga kololeza pamtunda winawake. M'malo otentha a United States, magawo onse amatengera madigiri 454 kupatula 150LB kutengera madigiri 260. 150 lb (150psi = 1MPa) Kalasi ya 25 yachitsulo yamagetsi imakhala ndi nkhawa yololezeka ya 1MPa pamadigiri 260, koma kupsinjika kololezeka kutentha kumatentha kwambiri kuposa uko, pafupifupi 2.0MPa.
Chifukwa chake, ambiri amati kupsinjika mwadzina kofanana ndi American Standard 150LB ndi 2.0MPa, kuchuluka kwamagetsi komwe kumafanana ndi 300LB ndi 5.0MPa, ndi zina zambiri. Chifukwa chake, kupsinjika mwadzina komanso kutentha kwapamwamba sikungasinthidwe malinga ndi momwe amasinthira. Pn ndi chiwonetsero chazomwe zimayenderana ndi kukakamizidwa, ndikupereka nambala yozungulira kuti iziyang'aniridwa, Pn ili pafupifupi yofanana ndi kutentha kwachizolowezi cha Mpa, yomwe imagwiritsidwa ntchito pamavuto apanyumba.
Kwa valavu yowongolera thupi lamagetsi la chitsulo, limatanthawuza kuthamanga kwakukulu kololeza pakagwiritsidwa ntchito pansipa 200 ℃; Thupi lachitsulo choponyera, kuthamanga kololeka kovomerezeka kantchito kotsikira 120 ° C; Pamagetsi oyang'anira omwe ali ndi matupi azitsulo zosapanga dzimbiri, kuthamanga kovomerezeka kogwiritsa ntchito kosapitirira 250 ° C. Kutentha kotentha kukakulira, kulimbikira kwa thupi la valavu kumachepetsedwa. Ma valves oyimilira aku America amafotokoza kupsinjika mwadzina m'kalasi ya mapaundi, omwe ndi kuwerengera kwa kutentha kokometsa ndi kukanikiza kwachitsulo malinga ndi ANSIB16.34. Chifukwa chachikulu chomwe kuchuluka kwa mapaundi ndi maina osakanikirana sichimodzi - makalata amodzi ndikuti kuchuluka kwa mapaundi ndi kuthamanga kwamaina kumakhala ndi datum wosiyanasiyana.
Nthawi zambiri timagwiritsa ntchito mapulogalamu kuti tiwerenge, koma ndikofunikanso kudziwa momwe tingagwiritsire ntchito matebulo kuti tipeze zolemera. Ku Japan, mtengo waukulu wa K umagwiritsidwa ntchito kuwonetsa kuthamanga. Kupanikizika kwa gasi, ku China, nthawi zambiri timagwiritsa ntchito unit unit "kg" (osati "jin"), unit ya kg. Mphamvu ya kupsyinjika ndi kilogalamu pa sentimita 2, ndipo kilogalamu imodzi yamagetsi ndi kilogalamu imodzi yamphamvu yogwira pa sentimita imodzi. Momwemonso, yofananira ndi akunja, pakukakamizidwa kwa gasi, yomwe imagwiritsidwa ntchito kwambiri ndi "psi", unit ndi "1pound / inch2 ″, ndi" Pound per square inchi ", dzina lonse la Chingerezi ndi Pound pa sikweya inchi.
Koma amadziwika kuti unit of mass, kapena LB., yomwe kwenikweni ndi LB. Ndiwo mphamvu ya mapaundi. Ma unit onse m'magawo a metric atha kugwiritsidwa ntchito: 1psi = 1 mapaundi / Inch2 ≈0.068bar, 1bar≈14.5psi≈0.1MPa, Europe ndi United States ndi mayiko ena amagwiritsa ntchito psi ngati unit. Mu Class600 ndi Class1500 yofananira ndi muyezo waku Europe ndi muyezo wa United States uli ndi mfundo ziwiri zosiyana, 11MPa (yolingana ndi gulu la mapaundi 600) ndimakonzedwe aku Europe, izi zili mu "ISO7005-1-1992 Steel Flanges" mkati zofunikira; 10MPa (yolingana ndi mapaundi 600) ndi malamulo aku America, omwe alembedwa mu ASMEB16.5. Chifukwa chake, sizinganenedwe kwathunthu kuti kalasi yofananira ya mapaundi 600 ndi 11MPa kapena 10MPa, ndikupereka kwamachitidwe osiyanasiyana ndikosiyana.
Valve system ili ndi mitundu iwiri: imodzi ndi Germany (kuphatikiza China) monga nthumwi yozizira (China ndi madigiri 100, Germany ndi madigiri 120) kuvomerezeka kogwira ntchito ngati chikhazikitso cha "kuthamanga mwadzina" kachitidwe. Imodzi ndiyo njira ya "kutentha kutentha" yoyimiridwa ndi United States, yomwe idakhazikitsidwa chifukwa chololeza kogwira ntchito pamtunda wina. Ku United States, kutentha kumayendera madigiri 454 kupatula 150LB kutengera madigiri 260.
Mwachitsanzo, 150LB. # 25 kaboni chitsulo vala ali ndi vuto lovomerezeka la 1MPa pamadigiri 260, pomwe kupsinjika kololezeka kutentha kumakhala kwakukulu kuposa uko, pafupifupi 2.0MPa. Chifukwa chake, ambiri amati kupsinjika mwadzina kofanana ndi American Standard 150LB ndi 2.0MPa, kuchuluka kwamagetsi komwe kumafanana ndi 300LB ndi 5.0MPa, ndi zina zambiri. Chifukwa chake, kupsinjika mwadzina komanso kutentha kwapamwamba sikungasinthidwe malinga ndi momwe amasinthira.
Nthawi yamakalata: Mar-24-2021