Page 185 - DixonSanitaryCatalog20082010

183 Dixon Sanitary 2010 800.789.1718
Technical Information
U
Technical
Service Temperature The maximum and minimum temperature of the media.
Silicone Dimethyl silicone, a synthetic rubber
Sintering Heat process in which powdered metal particles are heated to near melting point, fusing the metal
granules together.
Stem Torque The force required at the valve stem to open or close the valve against system pressure and service
conditions.
Supply Pressure The plant air supply pressure available to operate a pneumatic actuator. (plant air)
Surge Also known as water hammer. A rapid rise or decrease of internal pressure. Surge conditions occur
for various reasons, typically, but not limited to: start and stop sequences.
Torque A twisting or turning force. Usually measured in inch pounds (in-lbs) or foot pounds (ft-lbs)/(force
through a distance).
Tube A hollow cylinder especially one that conveys a fuid. For sanitary applications a thin wall is implied.
Tube Fitting A length of tubing formed into a usable shape either welded to an apparatus or welded to ferrules for
use in an apparatus.
Tubing A piece or length of tube.
Tumble Polish Surface A uniform fnish applied by vibratory equipment to stainless steel, varying from matte grey to bright,
depending on media used. This process may cause work hardening on the surfaces.
Turbulent Flow Irregular fow that is characterized by tiny whirlpool regions. The velocity of this fuid is defnitely not
constant at every point.
Velocity Head (hv) The energy of a liquid as a result of its motion at some velocity V. It is the equivalent head in feet
through which the water would have to fall to acquire the same velocity, or in other words, the head
necessary to accelerate the water. Velocity head can be calculated from the following formula:
V2
hv = 2g
Where g = 32.3 ft/second
V = liquid velocity in feet per second
The velocity head is usually insignifcant and can be ignored in most high head systems. However, it
can be a large factor and must be considered in low head systems
WOG Water, Oil, Gas. Pressure rating for valves handling these products. This does not include steam.
Welding Join two (or more) pieces of material by applying heat to produce a localized union through fusion
across the interface. For sanitary fttings, a ferrule is attached to the ends of a tube ftting by TIG
welding without the addition of fller metal. Tube fttings can then be joined with clamps and gaskets to
form parts of a system.
Work (Strain) Hardening An increase in hardness and strength caused by plastic deformation at temperatures below the
annealing ranges.
Pyrex® is a registered trademark of Corning Glass.
Tefon® is a registered trademark of E.I. duPont Nemours and Company.
Viton® is a registered trademark of DuPont Dow Elastomers.
Tygon® is a registered trademark of Saint-Gobain Corporation.
Santoprene™ is a trademark of Exxon Mobil Chemical
Tuf-Steel® is a registered trademark of RubberFab Technologies Group
Torque-rite™ is a trademark of RubberFab Technologies Group
Trademarks