Johnson Controls P70KA-7 Pressure Control, 50–450 PSI, Manual Reset, Ammonia

Description

Johnson Controls P70KA-7 Pressure Control Overview

The Johnson Controls P70KA-7 is a heavy-duty pressure control engineered specifically for ammonia refrigeration systems. Designed for demanding industrial and commercial refrigeration applications, this control provides reliable high-pressure protection with a manual reset function — ensuring the system cannot automatically restart after a high-pressure trip event without deliberate operator intervention.

Key Features

• Pressure range: 50 PSI to 450 PSI — suited for high-pressure ammonia refrigeration circuits
• 4-wire, 2-circuit design for versatile wiring configurations
• 1 Normally Open (N.O.) and 1 Normally Closed (N.C.) output circuit for flexible control integration
• Open High action: contacts open on rising pressure, providing safety shutoff on high-pressure conditions
• Manual reset required after high-pressure trip — prevents unattended automatic restart
• Specifically rated and designed for ammonia (R-717) refrigerant service
• Rugged construction for reliable operation in industrial refrigeration environments

Application

The P70KA-7 is ideal for use as a high-pressure safety cutout in ammonia refrigeration systems including cold storage facilities, food processing plants, ice rinks, and other industrial refrigeration installations. The manual reset feature is a critical safety requirement in ammonia systems, ensuring that a qualified technician must physically inspect and reset the control before the system resumes operation following a high-pressure event.

Specifications

• SKU / Part Number: P70KA-7
• Brand: Johnson Controls
• Pressure Range: 50 PSI to 450 PSI
• Wiring: 4-Wire
• Circuits: 2 (1 Normally Open, 1 Normally Closed)
• Action: Open High (opens on pressure rise)
• Reset Type: Manual Reset
• Refrigerant Compatibility: Ammonia (R-717)