Nzira yekushandura Valve Pressure PSI, BAR uye MPA?

PSI neMPA conversion, PSI is a pressure unit, inotsanangurwa seBritish pound/square inch, 145PSI = 1MPa, uye PSI English inodaidzwa kuti Pounds per square in. P iPound, S is a Square, uye ini iInch.Unogona kuverenga mayunitsi ese ane veruzhinji mauniti:1bar≈14.5PSI, 1PSI = 6.895kpa = 0.06895barEurope neUnited States nedzimwe nyika dzinoshandiswa kushandisa PSI sechikamu.

MuChina, isu tinowanzo tsanangura kudzvanywa kwegasi mu "kg" (panzvimbo ye "pound").Chikwata chemuviri ndicho “KG/CM^2”, uye kudzvanywa kwekirogiramu imwe isimba rekirogiramu pane imwe sikweya centimita.

Iwo mayunitsi anowanzoshandiswa kunze kwenyika ndee "PSI", uye iyo chaiyo unit "LB/In2", inova "pound/square inch".Chikwata ichi chakafanana netauro retembiricha (F).

Mukuwedzera, kune PA (Pascal, imwe Newton iri pane imwe square mita), KPA, MPA, BAR, millimeter yemvura column, millimeter mercury uye mamwe mayuniti ekumanikidza.

1 Bar (BAR) = 0.1 MPa (MPA) = 100 Knaka (KPA) = 1.0197 kg/square centimita

1 Standard atmospheric pressure (ATM) = 0.101325 MPa (MPA) = 1.0333 Bar (BAR)

Nekuti musiyano weyuniti idiki kwazvo, unogona kurangarira izvi:

1 Bar (BAR) = 1 Standard atmospheric pressure (ATM) = 1 kg/square centimeter = 100 kilo (KPA) = 0.1 MPa (MPA)

Kushandurwa kwePSI kunotevera:

1 Standard atmospheric pressure (ATM) = 14.696 pound/inch 2 (PSI)

Pressure shanduko hukama:

Pressure 1 Bar (BAR) = 10^5 Pa (PA) 1 Dadin/cm 2 (dyn/cm2) = 0.1 Pa (PA)

1 Terr = 133.322 Pa (PA) 1 mm Hg (mmHg) = 133.322 Pa (PA)

1 mm mbiru yemvura (mmh2O) = 9.80665 Pa (PA)

1 Injiniya yemuchadenga pressure = 98.0665 kite (KPA)

1 Knipa (KPA) = 0.145 pounds/inch 2 (PSI) = 0.0102 kg/cm 2 (kgf/cm2) = 0.0098 atmospheric pressure (ATM)

1 pound force/inch 2 (PSI) = 6.895 kenta (KPA) = 0.0703 kg/cm 2 (kg/cm2) = 0.0689 Bar (bha) = 0.068 atmospheric pressure (ATM)

1 Physical atmospheric pressure (ATM) = 101.325 Kenpa (KPA) = 14.696 pounds/inch 2 (PSI) = 1.0333 Bar (BAR)

Kune marudzi maviri emavharuvhu: imwe ndiyo "nominal pressure" system inomiririrwa neGermany (kusanganisira nyika yangu) patembiricha yakajairika (muChina i100 degrees uye Germany i120 degrees).Imwe ndeye "temperature pressure system" inomiririrwa neUS inomiririrwa pane imwe tembiricha pane imwe tembiricha.

Pakati petembiricha nekumanikidza system muUnited States, kunze kwe150LB yakavakirwa pa260 madhigirii, mamwe mazinga pamatanho ese akavakirwa pa454 madhigirii.

Iyo 250 -pound (150PSI = 1MPa) No. 25 carbon steel valve yaiva 260 degrees, uye kushushikana kunobvumirwa kwaiva 1MPa, uye kushandiswa kushungurudza pakupisa kwekamuri kwaive kwakakura kudarika 1MPa, inenge 2.0MPa.

Naizvozvo, kazhinji, iyo yezita yekumanikidza level inoenderana neUS standard 150LB i2.0MPa, uye iyo yezita yekumanikidza level inoenderana ne300LB ndeye 5.0MPa zvichingodaro.

Naizvozvo, haugone kushandura iyo yezita kudzvinyirirwa uye tembiricha nhanho zvinoenderana nekumanikidza shanduko formula.