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Relays & Switches

RP971A Ratio Relay

RP971A ratio relays are 4-port non-bleed pneumatic relays that produce a modulating pressure output proportional to pilot input changes. They are used to control pneumatic valves or damper actuators in sequence from a single thermostat.

RP971A ratio relay are 4-port non-bleed pneumatic relays that produce a modulating pressure output proportional to pilot input changes. They are used to control pneumatic valves or damper actuators in sequence from a single thermostat.

Features & Benefits:
  • Adjustable pilot start point pressures
  • Two pilot pressure spans available
  • Four sharp barb air connections
  • Molded plastic construction with neoprene diaphragms and stainless steel valve seats
  • 100 mesh stainless steel screens in main and branch ports
  • Designed for in-line mounting but can be wall- or panel-mounted
Engineering Specifications
Name
Description
File Size
Date
Size
Specification Data
application/pdf 69.16 KB
2/17/2022
69.16 KB
Engineering Data
application/pdf 8.16 MB
2/17/2022
8.16 MB
Installation Instructions
Name
Description
File Size
Date
Size
Installation Instructions
application/pdf 307.66 KB
2/11/2022
307.66 KB
Name
Description
File Size
Date
Size
Specification Data
69.16 KB
2/17/2022
69.16 KB
Engineering Data
8.16 MB
2/17/2022
8.16 MB
Installation Instructions
307.66 KB
2/11/2022
307.66 KB
Image
SKU
Description
alt
RP971A1015/U
Ratio Relay, 3 to 13psi, 5psi Pilot Input Span, Wall- or Panel-Mount
alt
RP971A1031/U
Ratio Relay, 21 to 90 kpa, 34 kpa Pilot Input Span, Wall or Panel-Mount
alt
RP971A1023/U
Ratio Relay, 21 to 90 kpa, 21 kpa Pilot Input Span, Wall or Panel-Mount
alt
RP971A1007/U
Ratio Relay, 3 to 13psi, 3psi Pilot Input Span, Wall- or Panel-Mount