Anderson JD Series - Specifications; Typical System Application

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1.2 SPECIFICATIONS (Differential Pressure Switch Only)1.2 SPECIFICATIONS (Differential Pressure Switch Only)
1.2 SPECIFICATIONS (Differential Pressure Switch Only)1.2 SPECIFICATIONS (Differential Pressure Switch Only)
1.2 SPECIFICATIONS (Differential Pressure Switch Only)
Process Pressure Range: -10 to +99 psig standard
(-10 to +199 psig, 0-9.9 Bar, 0-19.9 Bar optional)
Accuracy*: ± 1.0% of full scale
Adjustable Low Differential
Pressure Set Point Range: 1-15 psid standard
5-75 psid, 0.1-1.5 Bar optional
(in 5 psid increments)
Contact Rating: 5 amps, 120 or 240 Volts AC or DC, resistive or
inductive load; on differential and pasteurization channels
Housing Ambient Temp. Limits: 30-130°F
Power: 120 VAC standard
240 VAC optional;
50-60Hz
4-20mA outputs: proportional to raw, pasteurized, or differential pressure
(any two of the three) built in power supply, 500 ohms
maximum loop resistance
High pressure limit switch 0-99 psig (0-199 psig, 0-9.9 Bar, 0-19.9 Bar optional)
set point range: (on pasteurized channel only)
* Factory calibrated with provision for field adjustment
1.3 TYPICAL SYSTEM APPLICATION1.3 TYPICAL SYSTEM APPLICATION
1.3 TYPICAL SYSTEM APPLICATION1.3 TYPICAL SYSTEM APPLICATION
1.3 TYPICAL SYSTEM APPLICATION
The use of the HTST Differential Pressure Switch is shown in a typical HTST (High Tempera-
ture Short Time) pasteurizing system in Figure 2. When a Booster Pump is utilized to supple-
ment the Timing Pump, requirements include the installation of a Differential Pressure Switch
as shown. The switch senses the pressure differential in a regenerator between raw (cold) and
pasteurized (hot) product, to assure that pasteurized product pressure is at least one (1) psi
greater than raw product pressure, so that any internal leakage in the Regenerator will not
inadvertently contaminate the pasteurized product. Should the pressure differential fall below
the switch set point, the switch must shut off the Booster Pump.
A manual or automatic Back Pressure Valve (located before or after the Vacuum Breaker) is
frequently utilized to develop additional pressure on the pasteurized product side.