32 HyPrecision Predictive waterjet pump Operator Manual 810120
1 – Terminology
Terminology
pipe
A rigid, hollow cylinder that is used to move fluids; pipes are not always one piece from end to end; fittings
include adapters, tees, and reducers; pipes have a pressure rating
Pipe is sized by wall thickness (schedule) and a standardized outer diameter (OD). The OD in millimeters is
called nominal diameter (DN) and in inches it is called nominal pipe size (NPS). The actual physical OD can
be larger than the nominal OD.
Refer to hose, tube, and tubing.
pollution degree
A safety classification that describes the environment in which a piece of electrical equipment operates
Underwriters Laboratories (UL) and the International Electrotechnical Commission (IEC) specifies pollution
degree 3 as an environment with conductive pollution or dry nonconductive pollution that becomes
conductive because of condensation. A pollution degree 4 environment has pollution that is persistently
conductive because of dust or wet conditions.
postfilter water
Low-pressure water that is between the water filters and the intensifier
prefilter water
Low-pressure water that is between the utility panel and the water filters
psi
Pound-force per square inch, a unit of pressure: 1 psi equals 0.07 bar or 6.89 kPa or 6,895 N/m
2
refrigeration ton
The heat transfer necessary at 0°C (32°F) to make 1 short ton (2,000 lb) of ice in 24 hours.
3.5 kW = 1 refrigeration ton = 12,000 Btu/hour
relative humidity
Also known as RH or ambient humidity; how much water vapor is in the air, given as a percentage
Water vapor condenses as the relative humidity nears 100%.
reverse osmosis
A method for treating water in which the water is pushed through a semipermeable membrane to remove
impurities
RTV
Room-temperature vulcanization, silicone rubber is mixed with a curing agent to form a compound that is
temperature- and thermal-resistant
SAE
Society of Automotive Engineers International, a professional association that aligns technical standards
based on best practices in the aerospace, commercial vehicle, and automotive engineering industries
SAE Code 61 fittings are made for 207-bar or 20,700-kPa or 3,000-psi applications.
SAE Code 62 fittings are made for 414-bar or 41,400-kPa or 6,000-psi applications.
SLPM
Standard liters per minute, a USA measurement of the flow rate of a gas at a specified volume and
temperature
Refer to
NLPM.
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