1. The pressure of a fluid that is independent of the kinetic energy of the fluid. 2. Pressure exerted by a gas at rest, or pressure measured when the relative velocity between a moving stream and a pressure measuring device is zero.
The pressure of a fluid exerted in all directions equal and opposite to the pressure tending to compress the fluid. In ventilation applications, static pressure is usually the difference between the absolute pressure in an exhaust system and atmospheric pressure, such that static pressure less than atmospheric pressure is termed "negative static pressure" and static pressure above atmospheric pressure is termed "positive static pressure." (The tendency to either burst or collapse the pipe.)
The pressure which tends to burst a pipe. It is used to overcome the frictional resistance to flow through the pipe. In the case of forced-air heating systems, static pressure forces air through ducting and enclosed areas. It is usually expressed in inches of water column.
Water pressure head available at a specific location when no water is being used so that no friction loss is being encountered. Static pressure is that pressure observed on the engine inlet gauge before any water is taken from the hydrant.
Pressure produced by an unmoving column of water. (also: static head) There are no friction/head losses when water is not moving, so static pressure is determined only by the vertical height of the water column. The static pressure on a 10ft. tall vertical pipe full of water would be the same as a 1000ft. long pipeline with 10ft. of head over its entire distance. See also: Dynamic pressure, Head, Head Loss, Potential Energy
A measure of potential energy per unit of volume of air. Static pressure describes the partial vacuum created in a house by exhaust fans, and goes up as the total air inlet area is decreased. It also describes the â€œresistanceâ€ against which the fan must work. Static pressure is usually measured in inches of water. Poultry house ventilation systems are normally designed to operate at static pressures in the 0.04 â€“ 0.10 inch range.
Static pressure is the normal force per unit area at a small hole in the wall of a duct or other boundary surface. The wall and boundary surfaces must be parallel to the gas stream and so located that velocity will have no effect on the measurement. It exists by virtue of the gas density and degree of compression alone.
The stable pressure in an HVAC air duct that occurs when the system is on, the fan blower is running and the pressure reaches an equilibrium point with the air flow and pressure remaining constant. Static pressure is measured by use of a manometer, in inches of water, which indicate how many inches of water the pressure can sustain at a stead state.
Static pressure is a term used in ventilation engineering, airspeed indication, fluid statics, hydraulics and flow measurement. It is defined as the potential pressure exerted in all directions by a fluid at rest. For a fluid in motion, static pressure is measured in a direction at right angles to the direction of flow.