Honeywell RP670A1001 Pneumatic Switching Relay SPDT 3-7 PSI

The Honeywell RP670A1001 is a pneumatic switching relay designed to block, divert, or bleed pneumatic air lines when pilot pressure changes from one specific value to another. This single-pole, double-throw (SPDT) relay switches between 3 and 7 PSI, making it ideal for HVAC control applications.

Key Features:

• SPDT switching action with change-over pressures at 3 and 7 PSI
• Barb-type air connections for 5/32 inch (4mm) O.D. plastic tubing
• Durable molded plastic construction with neoprene diaphragms and stainless steel lever
• Maximum safe air pressure rating of 30 PSI
• Versatile mounting options: in-line, wall, or panel mounting with included metal spring clip
• Compact dimensions: 1-1/2 inch diameter x 2-1/4 inch deep

This relay is commonly applied in Day-Night, Summer-Winter, Start-Stop, On-Off-Auto, and other multiple condition HVAC systems where control sequences change as conditions vary. The RP670A1001 is compatible as a replacement for Johnson, Powers, Robertshaw, Barber-Colman, and older Honeywell pneumatic relay devices.