Common Pressure Unit Conversion Table（Hongqi Instrument）

Common pressure unit conversion table

Pressure unit conversion table

	Pa帕	bar巴	kgf/cm²	atm	at	Torr	mm H₂O	mmHg	Psi
1 Pa帕	1	0.00001	0.00001	0.00001	0.00001	0.0075	0.10197	0.0075	0.00014
1 bar巴	100000	1	1.01972	0.9869	1.01972	750.062	10.1972	750.062	14.504
1 kgf/cm²	98066.5	0.98067	1	0.9678	1	735.6	10.000	735.6	14.22
1 atm标准大气压	101325(约0.1MPa)	1.01325	1.033	1		760	10.332	760	14.7
1 at工程大气压	98067(约0.1MPa)	0.98067	1	0.9678	1	735.6	10.000	735.6	14.22
1 Torr托	133.3	0.00133	0.00136	0.00132	0.00136	1	13.6	1	0.01934
1 mm H₂O毫米水柱	9.8067	0.000098	0.0001	0.0000968	0.0001	0.07356	1	0.07356	0.00142
1 mm Hg毫米汞柱	133.322	0.00133	0.00136	0.00132	0.00136	1	13.5951	1	0.01934
1 Psi 磅/寸²	6894.76	0.06895	0.07031	0.06805	0.0703	51.7149	703.07	51.7149	1

Note: Mm column of water is the height of the water column at 4 ° C and mm mercury is the height of the water column at 0 ° C.

1mmAg = 9.80665Pa = 0.0980665hPa

1atm = 760 mmHg = 1013hPa

1mmAg = 0.0735793mmHg

Ⅰ,Pressure is the force per unit area

Pressure: absolute pressure, gauge pressure, atmospheric pressure. Correlation: Absolute Pressure = gauge Pressure + atmospheric Pressure

* Absolute Pressure: when the Pressure represents the difference with the complete vacuum. Measure the actual pressure at the place.

* Gauge Pressure: refers to the difference between its gas value and the atmospheric Pressure in the region.

* Pressure Atmospheres: The Pressure generated by the weight of the atmosphere. The standard atmospheric Pressure is 29.92 "inhg.

Wind pressure: including total pressure (P.T)= static pressure (Ps)+ dynamic pressure (Pv) that is, velocity pressure (V.P).

Total Pressure=Static Pressure+Dynamic (Velocity) Pressure.

The pressure produced by the fan is measured by water column, because the pressure of the fan is very small; However, the density of mercury is very high (1mmHg= 13.6mmAq). When mercury column (mmHg) is used to measure, the reading is not obvious, so water column (mmAq or mmH20) is used to measure or calculate.

For example, when the mercury column is used,760mm mercury column =760 mmHg when the water column is used, 100mm water column =100 mmAq. = (4" wg)

Aq is short for Latin Aqua. The pressure of 1mmAq is about 1kg/m2.

1Standard pressure = 1.0332kgf /cm2= 10.34mag =760mmHg=29.92inHg (Kg is mass unit,Kgf is weight unit)

Ⅱ,General unit of Pressure (CNS 7778) (Note 2)

Atm. (Pressure Atmospheres) =760mmHg

inches of mercury (Hg): ("Hg) 3.377=KPa.

Inches of water column: (" Wg or H20) 0. 249=KPa.

Feet of water column: (' Wg) 2. 989=Kpa

Kilogram/square meter: kg/m2; kg/cm2 98=KPa (1mmAq=9. 797Pa<9.8Pa=9. 8Pa) friction resistance

" wg/100' 8.2=Pa/m

" wg/100' 98.1=Pa/m

mAq 9.8=KPa; mmAq 0.0098=KPa; mmAq/m 9.8=Pa/m