Under Pressure
The low pressure side of a pump.
The most common type of pump on fluid systems.
What is a centrifugal pump?
The formation and collapse of air bubbles, due to turbulence or low pressure zones.
The term for uneven, chaotic flow in a piping system.
An example of a positive displacement pump, this equipment pressurizes gaseous refrigerant on a hydronic system.
What is a compressor?
The the nominal measurement for atmospheric pressure at sea level.
What is 14.7 psi.
The portion of a pump which spins fluid to impart pressure and velocity to the system.
What is an impeller?
The condition in which a trapped bubble of air prevents the efficient flow of fluid through a system.
What is air lock?
A pump skid is anchored to this to dampen the transmission of vibration into the ground.
What is a concrete pad?
This valve takes the place of a check valve, a balancing valve, and a shut-off valve.
What is a triple-duty valve?
This appurtenance creates a point of zero pressure change in a system, and thus should be installed on the suction side of a pump.
What is an expansion tank?
The portion of a pump which houses the impeller.
What is a volute?
The presence of this gas is responsible for corrosion inside most piping systems.
What is oxygen?
This is connected to a pump to vibrationally isolate it from an attached piping system.
What is a flex line or bellows flex?
What is a cooling tower?
The term for the force exerted by total height of the fluid at rest.
What is static pressure?
Both rotary and reciprocating pumps are examples of this classification of pump.
What is a positive-displacement pump?
What is an automatic air vent or Hoffman valve?
In lieu of a length of straight pipe, this may be affixed to the suction side of a pump to prevent turbulent flow.
What is a suction diffuser?
Besides water, the most common variety of HTF used in hydronic systems.
What is ethylene glycol?
This valve is installed on the make-up water line to ensure system pressure can be lower than city pressure of the domestic water supply.
What is a pressure reducing valve?
A diagram which details the flow characteristics of a pump as total head varies.
What is a pump curve?
What is entrained air?
The term for supplementary supports attached to pipe and equipment to prevent it from excessive movement during earthquakes.
What are seismic restraints?
A common abbreviation for differential pressure.
What is ΔP?