Wakambozvibvunza kuti zvipfupiso zvakaita seDN, PN, ½, WOG, uye mavara eCWP pavharuvhu anoreva? Ndinoda kuziva nezve mavanga ari pavharuvhu uye kuti mamwe mabhii angave api? Ngatinyure mukati uye tiongorore.

Micherechedzo pavharuvhu kazhinji inomiririra ruzivo rwakakosha sehukuru hwayo, kumanikidzwa uye tembiricha ratings, kuumbwa kwezvinhu, brand, kuyerera nzira, uye zvitupa. Mashoko aya akakosha pakusarudza kwakakodzera, kuiswa, uye kushanda, kuve nechokwadi chekuti valve inoshandiswa zvakachengeteka uye nemazvo.

1. Valve Size Kumaka:“DN” uye “½” Chidimbu kana Tsamba dziri pavharuvha

Saizi yevharuvhu ndiyo inonyanya kukosha parameter, zvichiratidza zita rekuti bhomba rinokwana. Kazhinji inomakwa neimwe yenzira mbiri:

• DN (Diameter Nominal): Iyo yezita dhayamita, metric unit (mumamirimita) inoshandiswa munyika dzakawanda (ISO) uye European / Chinese (EN/GB) mipimo. Semuyenzaniso, DN50 zvinoreva kuti vharuvhu ndeyepombi ine a 50 mm zita dhayamita.
• NPS (Nominal Pipe Size): Chikwata cheumambo (mumainch) inoshandiswa muAmerican standards (ASME/ANSI). Semuyenzaniso, 4″ kana NPS 4 inoratidza vharafu ndeye 4-inch pombi. Dzimwe nguva, nhamba chete, zvakadai 4, inokandwa pamuviri.

2. Valve Pressure Rating Kumaka: “PN” uye Nhamba paVaruvha

Chiyero chekumanikidza chinoratidza huwandu hwekushanda kwevhavhavha inogona kumira zvakachengeteka pane imwe tembiricha uye yakakosha pakusarudza.

• ISO/EN/GB Zviyero: Uses “Kudzvanywa kwemusoro” (PN), uko unit iri bar. Kukosha kwePN kunomiririra chiyero chekumanikidza pane tembiricha yekamuri. Mienzaniso: PN16, PN40.
• ASME/ANSI Mitemo: Inoshandisa a “Kirasi” system, yakanyorwa se CLASS, CL, Lb, kana #. Mienzaniso inosanganisira CLASS 150, 300#, kana 150 Lb. Izvi zvinomiririra pressure-temperature curve, kwete yenguva dzose yekumanikidza kukosha.
• General Chinangwa Ratings:
  • WOG (Mvura, Mafuta, Gasi): Inoratidza chiyero chekumanikidza mu psi yemvura, mafuta, uye gasi sevhisi pane ambient tembiricha. Muenzaniso: 600 WOG.
  • CWP (Cold Working Pressure): Iyo yemazuva ano yakaenzana neWOG, zvichiratidzawo kuwanda kunobvumidzwa kudzvanywa pane ambient tembiricha. Muenzaniso: 1000 CWP.

3. Valve Material Marking:

Iyo kodhi yezvinhu ndeimwe yeakakosha mamaki, kutsanangura zvinhu zvezvikamu zvikuru zvine dzvinyiriro semuviri nebhoneti.

• Kanda Carbon Steel: WCB ndiyo yakajairika giredhi.
• Kanda Stainless Simbi: CF8(yakaenzana ne 304 SS), CF8M(316 SS), CF3(304L), CF3M(316L).
• Kanda Alloy Steel: WC6, WC9(chrome-moly simbi yemhando yepamusoro yekupisa sevhisi).
• Forged Materials: A105(carbon simbi), A182 F316(simbi isina ngura).
• Tungamira Mahara: “LF” zvinoreva zvinhu zvisina mutobvu, kusanganisira ndarira nendarira.

4. Valve Media Kumaka:

Iyo chaiyo sevhisi medium (e.e., “Sulfuric Acid”) kazhinji haina kumakwa. Kukodzera kwepakati kunotsanangurwa nevhavhaMaterial. Zvisinei, kune mamwe masevhisi akakosha, mavara chaiwo anoshandiswa:

• WOG: yakakodzera kune yakajairika Mvura Oiri Gasi repakati
• S: Steam medium
• G: Gasi repakati

5. Valve Brand Marking:

Izvi zvinoreva chiratidzo chemugadziri, logo, kana chidimbu chezita, rinoshandiswa kuzivisa mugadziri. Semuyenzaniso, “BMAG” kana chiratidzo chakasiyana.

6. Valve Flow Direction Marking:

Kune unidirectional mavharuvhu senge globe mavharuvhu, cheki mavharuvhu, uye mavharuvhu emakona, chiratidzo chemuseve chakajeka(→) inofanira kukandwa kana kudhindwa pamuviri. Museve uyu unoratidza kwakaringana mafambiro enhau. Kuisa zvisina kunaka kunogona kukonzera kusashanda kana kukanganisa.

7. Valve Certifications Kumaka:

Aya maratidziro anoratidza kuti vharuvhu inoenderana neyakajeka yedunhu kana indasitiri mirau nezviyero.

• CE: Kudimburira kwe “European Conformity,” zvichiratidza kutevedzera kuchengetedzwa kweEU, utano, uye mitemo yekuchengetedzwa kwezvakatipoteredza, inodiwa kuti uwane musika muEurope.
• Api: IAmerican Petroleum Institute monogram inowanzowanikwa pamavharuvhu anoshandiswa muindasitiri yemafuta negesi.
• CSA: Canadian Standards Association, chitupa chinodiwa kutengesa michina muCanada.
• UL: Underwriters Laboratories, certification chitupa chekuchengetedza chinopihwa ne Underwriters Laboratories, kambani yepasi rose yekuchengetedza sainzi. Zvinoreva kuti chigadzirwa, chikamu, kana sisitimu yakaedzwa uye inosangana neyakachengetedzeka mwero.

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