Water Hammer Arrester Definitions
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #
Select the first letter of the word from the list above to jump to appropriate section of the Water Hammer Arrester Glossary.
Air Chamber
A closed section of pipe or other container
designed to trap air at atmospheric pressure when mounted on a tee in a water supply line
and intended to reduce water hammer pressures.
Bellows
The flexible element of bellows form in
some types of water hammer arresters which separates the displacement cushion from the
surge chamber.
Bladder
The compressible element of bladder form in
some types of water hammer arresters which contains the displacement cushion and separates
it from the surge chamber.
Calculated Air Chamber
An air chamber designed in accordance with
the Dawson & Kallnske formula for air chambers for reducing water hammer pressures.
Compression Chamber
That portion, within the casing or shell,
of a water hammer arrester which contains the displacement cushion.
Diaphragm
The flexible element of diaphragm form in
some types of water hammer arresters which separates the displacement cushion from the
surge chamber.
Displacement Cushion
Compressible gas aor air contained under
pressure in the compression chamber of a water hammer arrester to absorb the shock
pressure.
Displacement Fluid
Used in some water hammer arresters as an
interface between the displacement cushion and the flexible element.
-
(empty)
Fixture Unit
A measure of the portable hydraulic demand
on the water supply by various types of plumbing fixtures.
The supply fixture unit for a particular fixture depends on its volume rate of
supply, on the time duration of a single supply operation, and on the average time between
successive operations.
Flow Pressure
The gauge pressure in a flowing water
supply line immediately upstream of a fixture valve which is open and flowing.
Gauge Pressure
Pressure in pounds per square inch or kPa,
above atmospheric pressure; the pressure as indicated by a single Bourdon tube pressure
gauge.
Hydraulic Fluid
See DISPLACEMENT FLUID
-
(empty)
-
(empty)
-
(empty)
-
(empty)
-
(empty)
-
(empty)
-
(empty)
-
(empty)
-
(empty)
-
(empty)
Shock Absorber
See WATER HAMMER ARRESTER, DEFINITION
Shock Pressure
The maximum gauge pressure developed in a
water supply line during shock caused by rapid valve closure.
Static Pressure
The pressure in pounds per square inch in a
dormant or non-flowing branch line.
Surge Chamber
That portion within a water hammer arrester
which is in direct fluid communication with the piping system which receives the fluid
surge for suppression.
Surge Control Orifice
A restricted opening at the inlet of some
water hammer arresters provided to decrease the rate of pressure change of the liquid
flowing between the surge chamber and the pipe system.
Surge Pressure
See SHOCK PRESSURE
-
(empty)
-
(empty)
-
(empty)
Water Hammer
The term used to describe the destructive
forces, audible pounding and vibration which develop in a piping system when a column of
non-compressible liquid flowing through a pipe line at a given pressure and velocity is
abruptly stopped.
Water Hammer Arresters
A manufactured device, other than an air
chamber containing a permanently sealed cushion of gas or air designed to provide
continuous protection against excessive surge pressure without maintenance.
Waterlogged
Condition of an air chamber when all or
part of its normal air content has been displaced by water thus impairing its efficiency.
-
(empty)
-
(empty)
-
(empty)
-
(empty)
Copyright © 2000-2007 by Jay R. Smith Mfg. Co.®
|