P74EA-8C Johnson Controls Pressure Control

Overview

The Johnson Controls P74EA-8C is a differential pressure control switch designed to sense pressure differences between two points. It features two opposing pressure elements and an adjustable range setpoint spring with a visible calibrated scale, allowing adjustments without removing the cover.

Features

• Completely enclosed contact mechanism
• Externally adjustable with a visual setpoint scale
• Automatic reset by differential
• Includes a universal mounting bracket and brass bellows diaphragms

Specifications

• Range Pressure Differential: 2 to 26 psig
• Mechanical Differential: Fixed 3.5 psid
• Contact Form: SPDT (Single-Pole Double-Throw)
• Contact Rating: 16 A @ 120 VAC
• Capillary Tube Length: 36 inches
• Maximum Operating Pressure: 120 psid

Applications

• Lube oil pressure sensing on refrigeration compressors
• Proof of flow across a chiller or water-cooled condenser
• Detecting flow in a heating system or cooling coil
• Motor actuator positioning and proving pump operation