28 HyPrecision Predictive waterjet pump Operator Manual 810120
1 – Terminology
Terminology
air cooled
The system uses hydraulic fluid and an external heat exchanger to keep the pump cool
attenuator
A pressure vessel that compensates for pressure fluctuations and maintains a consistent output water
pressure
AWG
American Wire Gauge, a standardized wire gauge system that is used in North America
bar
A unit of pressure: 1 bar equals 100 kPa or 14.5 psi or 100,000 N/m
2
Btu
British thermal unit, a standard unit of energy equal to approximately 1,055 joules or 1,055 watt-seconds
Used in the United States and sometimes in the United Kingdom, the Btu measures the energy necessary to
increase the temperature of 1 pound of water 1°F at sea level.
Energy-production or energy-transfer are frequently given in Btus per hour: 1 Btu/hr
equals 0.293071 watts; 1 watt equals 3.4 Btu/hr
CNC
Computer numerical control, preprogrammed computer software controls the movement of a machine or tool
cooling mode
The pump idles with the intensifier off; hydraulic fluid flows through the pump at minimum pressure, the
cutting-water solenoid is open, and if the system has a boost pump, the boost pump is on
cooling water
In a water-cooled system, low-pressure water flows through the heat exchanger to keep the hydraulic fluid
cool
cSt
Centistoke, a measurement of kinematic viscosity; water has a viscosity of 1 centistoke or 1 mm
2
/second
cut-pressure mode
High-pressure water from the intensifier that is at cutting pressure
Refer to
pierce-pressure mode.
dB(A)
A-weighted decibels, an expression of the relative loudness of sound in air as perceived by the human ear
dynamic seal
The high-pressure seal that is nearest the hydraulic center section; this seal touches the plunger
Refer to
static seal.
energy source
A source of electric, mechanical, hydraulic, pneumatic, chemical, thermal, or other energy
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