-- The force exerted on an area by the column of air above that
area. Atmospheric pressure at sea level is 14.7 pounds per square inch.
-- Raw product tank located at the start of a pasteurization system
used to maintain a constant supply of product to the pasteurizer.
-- A centrifugal pump placed in a pasteurizing system between the
balance tank and the raw regenerator and capable of producing positive
pressure in the raw regenerator.
-- A sealed flat metal tube filled with a gas mixture that has
been formed into a coiled spiral, located inside the recorder-controller.
This spiral expands or contracts in response to the vapor pressure of
the gas mixture. This coil is located on one end of the capillary tube
with the recorder-controller temperature sensing bulb at the other.
-- A thin metal tube, containing a mixture of liquids with low
vapor pressures, that connects the bourdon tube in the recorder-controller
with the temperature sensor bulb located at the flow diversion device.
This thin tube is usually protected by a flexible metal cable.
-- A high speed pump that produces product flow due to the velocity
increase of the liquid caused by the rotation of the pump impeller.
-- See Balance Tank.
-- The section of a heat exchanger (press) in which one of several
non-toxic coolants flows in a counter current direction on the opposite
side of a stainless steel plate of the pasteurized product.
-- A stainless steel plate in the regenerator section of the press
designed to change the direction of flow.
-- Either a single stem (one three-way valve) or dual stem device
(two, three-way valves connected by a common yoke), designed to change
the direction of product flow when working in conjunction with the recorder-controller.
-- An instrument used in meter based systems which compares the
flow signal from the flow transmitter to a set point and either controls
the centrifugal pump speed or regulates a flow control valve downstream
of the meter and centrifugal pump.
-- An instrument used in meter based systems which converts signals
from the magnetic flow meter to a 4- 20ma current.
-- A solenoid actuated recording pen (located on the outer edge
of the recording chart) that records the position of the flow diversion
device in a continuous flow pasteurization system. This pen on a meter
based system only records the flow diversion device position that has
been electronically signaled by the flow recorder/controller.
-- Equipment designed to effect heat transfer between two or more
mediums.(plate type, triple tubes, etc.).
-- The section of piping in continuous flow pasteurizers of sufficient
length to provide the minimum legal residence time for heated milk.
WATER TEMPERATURE CONTROLLER
-- A system which controls the temperature of the heating medium
by regulating a mixture of steam and water that circulates through the
heating section of the press.
-- An instrument used in a meter based system that converts a 4-20ma
current signal to an air signal (usually 15-30 psi) which drives the flow
-- The movement of high viscosity products through a pipe in concentric
layers where the fastest particle may move at twice the speed of the average
-- See Timing Pump
-- Operated by compressed air.
-- A automatic or manually controlled valve used in combination
with the booster pump for the purposes of start up of a continuous pasteurizer
with a milk to milk regenerator. This valve allows for by-passing the
regenerator in order to provide the proper pressure relationships in the
regenerator, thus allowing the booster pump to operate.
-- The application of any effective method or substance to a clean
surface for the destruction of pathogens, and of other organisms as far
as is practicable. Such treatment must not adversely affect the equipment
, the milk or milk product or the health of consumers. Sanitization may
be accomplished by either the application of heat or suitable chemicals
used in accordance with good manufacturing practices.
THERMAL LIMIT CONTROLLER
-- The term sometimes used interchangeably when referring to the
-- An electronically operated valve used in various air controlling
applications on continuous pasteurizers.
-- Any centrifugal pump used in the system for the purposes of
enhancing product flow to a component, other that those located between
the balance tank and the raw regenerator.
DELAY RELAY (TDR)
-- An adjustable timer(either mechanical or electronically controlled)
used to maintain a set time period equal to or greater than the required
minimum. All required TDR's must be sealed by the regulatory agency.
-- Sanitary , positive displacement -type (rotary or piston) or
in the case of meter based systems a centrifugal product pump, which provides
a constant measured rate of flow to the continuous pasteurization system.
-- Flow where considerable mixing occurs across a pipe cross section
and the velocity is nearly the same across this section. Turbulent flow
occurs most frequently in less viscous liquids and is often characterized
by higher friction losses than would be expected.
-- An air relief valve held in the closed position by product flow
pressures and which opens and admits air when the product pressure goes