P74FA-1C | DIFFERENTIAL PRES CONTROL; SPDT; F/WATER SYS.; DIFF 2# SNAP ACTING 1/4" MALE FT; | Johnson Controls

DIFFERENTIAL PRES CONTROL; SPDT; F/WATER SYS.; DIFF 2# SNAP ACTING 1/4" MALE FT;

Description

Series P74 measures the pressure difference between two sources: supply lines and return lines. A change in differential pressure will reposition the switching mechanism to cause corrective action of the supplementary control equipment. Refer to the P47 Series Steam Pressure Controls Product Bulletin (LIT-125450) for important product application information.

Features

•  field-proven Penn switch with a completely enclosed contact mechanism
•  pressure differential setting is easily changed without removing the cover

Applications

•  differential pressure sensing on chillers or water-cooled condensers
•  lube oil failure cutout for refrigeration compressors (same as the P28, but does not incorporate time delay)
•  positioning M100 Series motor-actuated valves (P74JA-2)
•  to prove pump operation Accessories All models on this page include a universal mounting bracket.

Repair Information

If the P74 Series Differential Pressure Control fails to operate within its specifications, replace the unit. For a replacement control, contact the nearest Johnson Controls® representative.

• Differential Pressure Control
• SPDT (Snap Acting)
• 8-60 psi Adjustable Range Pressure Differential
• 1.5 Fixed Switch Differential
• 1/4" Male Flare
• Brass Bellows