230 VAC Factory Direct Differential Control Pressure Switch Without Time Delay (Johnson Controls, Pe

230 VAC Factory Direct Differential Control Pressure Switch Without Time Delay (Johnson Controls, Pe
Code: PRS74D4
Price: $314.26
Quantity in Basket: None
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230 VAC Factory Direct Differential Control Pressure Switch Without Time Delay (Johnson Controls, Penn)

Introduction
These controls are designed to sense pressure
differences between two points and may be
used as operating or limit controls. Typical
applications are to detect flow across a chiller or
water cooled condenser, to detect flow in a
heating system and sensing lube oil pressure
differential on refrigeration compressors.

Description
The P74 series of differential pressure switches
incorporate two opposing pressure elements
and an adjustable range setpoint spring with a
calibrated scale. The control switches at the
indicated setpoint on an increase in differential
pressure and switches back to the normal
position when the different pressure decreases
to the setpoint less the mechanical switching
differential.

Note
These controls are designed for use only
as operating controls. Where an operating
control failure would result in personal
injury or loss of property it is the
responsibility of the installer to add devices
or systems that protect against, or warn of,
control failure.

Feature and Benefits
•Heavy duty pressure elements. Withstands high overrun pressures.
•These controls may be used in combination with series P28 lube oil protection control on two compressor, single motor units. Reduces the lube oil system cost.

Product Specifications:
Range Ä P (bar) 0.6/4.8
Switching differential (bar) 0.7/2 adj.
Medium Non-corrosive Refrigerant
Pressure connector (style) 5
Electrical rating 15(10)A 230 Vac
Maximum bellows pressure absolute (bar) 23
Maximum allowable diff. in pressure between the bellows (bar) 14
Pressure element material stainless steel/copper

Replaces Part Numbers:
2164797900100020 2164797900100020 P74D49300 P74DA-9300 P74D4-9300 CARP74DA9300

Used In Equipment Model Numbers: