Pound per square inch

Pounds per square inch psi Reciprocal lattice vector (cir- G... 

Numerous mathematical formulas relating the temperature and pressure of the gas phase in equilibrium with the condensed phase have been proposed. The Antoine equation (Eq. 1) gives good correlation with experimental values. Equation 2 is simpler and is often suitable over restricted temperature ranges. In these equations, and the derived differential coefficients for use in the Hag-genmacher and Clausius-Clapeyron equations, the p term is the vapor pressure of the compound in pounds per square inch (psi), the t term is the temperature in degrees Celsius, and the T term is the absolute temperature in kelvins (r°C -I- 273.15). 

A constant, reproducible flow rate on the order of 3-10 ml min at a pressure of several thousand pounds per square inch makes the pump the most... 

Atmospheres Pounds per square inch 14.696 Centimeters Feet 0.0.3281... 

Bars Atmospheres 0.9869 Centimeters of mercury at 0 C. Pounds per square inch 0.19.3.37... 

Bars Pounds per square inch 14.504 Centimeters of water at 4 C. Newtons per square meter 98.064... 

Kilograms per square centimeter Pounds per square inch 14.223... 

Pounds per square inch Kilograms per square centimeter 0.07031... 

Pounds per square inch Newtons per square meter 6894.8... 

FIG. 14-66 Efficiency of FRI reLoiler and space below bottom support plate. To convert pounds per square inch absolute to Idlopascals, multiply by 6.8947 to convert (feet per second) (pounds per cubic foot) " , to (meters per second) (kilograms per cubic meter) " , multiply by 1.2199. Sil-oey and Keller, Cbem. Eng. Prog., 62(1), 6S (1,966).]... 

FIG. 14-88 Droplet -size distribution for three different types of nozzles. To convert pounds per square inch gauge to Idlopascals, multiply by 6.89 to convert gallons per minute to cubic meters per hour, multiply by 0.227. (Spraying Systems Inc. )... 

Coiirtesy Bepex Corporation. To convert pounds per square inch to newtons per square meter, multiply hy 6895 to convert Idlowatthoiirs per ton to Idlowatthoiirs per megagram, multiply hy 1.1. 

Table A.4 Head of water in feet and equivalent pressure in pounds per square inch ...

Table A.5 Pressure in pounds per square inch and equivalent head of water in feet...

Because simple pressure gauges are made with an artificial zero at atmospheric pressure, this is why the term psig exists, meaning pounds per square inch gauge. As mentioned earlier, the psig is equal to the absolute pressure minus the atmospheric pressure. 

The vapor pressure of a liquid is the absolute pressure at which the liquid vaporizes or converts into a gas at a specific temperature. Normally, the units are expressed in pounds per square inch absolute (psia). The vapor pressure of a liquid increases with its temperature. For this reason the temperature should be specified for a declared vapor pressure. 

Head = H Liquid force measured in feet of elevation. H can be converted into pounds per square inch (psi). This is di.scussed in Chapter 2. 

The pressure/gap combination should be constructed so the voltage can be kept relatively low while maintaining reasonable operating pressures. Low voltage protects the dielectric and electrode surfaces. Operating pressures of 10 -15 pounds per square inch gauge (psig) are applicable to many waste treatment uses. 

Pb= back-pressure, in pounds per square inch gauge. 

Note The curves above represent a compromise of the values recommended by a number of relief valve manufacturers and may be used when the make of the valve or the actual critical f ow pressure point for the vapor or gas is unknown. When the make is known, the manufacturer should be consulted tor the correction factor. These curves are for set pressures of 50 pounds per square inch gauge and above. They are limited to back-pressure below critical flow pressure for a given set pressure. For subcntical flow back-pressures below 50 pounds per square inch gauge, the rnanufacturer must be consulted tor values of Kk. 

---