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标题:阀门磅级,MPA, BAR, PSI和公斤的含义和换算
正文:
102.0087mH2O
PSID, psid
Pounds per Square Inch Differential. Not justa unit, but a comment that the number represents a difference between twopressures. PSID gauges have two input connectors. PSIA is PSID relative tovacuum, PSIG is PSID relative to local atmospheric pressure, and PSIS is PSIDrelative to a sealed 14.7-psi pressure vessel.

PSI = Pound per Square Inch (磅/每平方英吋)
PSID == PSI Differential (PSI 压差).
PSIA == PSID to Vacuum (对真空的压差)
PSIG == PSID to environment (对表外环境的压差)

也就是平时说的psi 是压力单位 磅每平方英寸
1psi=6.894KPa=0.00689MPa
1MPa=145psi=10公斤/平方厘米
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