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Reference
70-6925 55
RP670 Pneumatic Switching Relay
Pneumatic switching relays block, divert, or bleed pneumatic air
lines when pilot pressure is changed from one specific value to
another. Commonly applied in Day-Night, Summer-Winter, Start-
Stop, On-Off-Auto and other multiple condition systems where
control sequence is changed as conditions change. Replacement
devices are available for Johnson, Powers, Robertshaw, Barber-
Colman, and older Honeywell devices.
• Available with either single-pole, double-throw (SPDT) or double-
pole, double-throw (DPDT) switching action.
• Second switch on dpdt (RP670B) models molded in natural color for
identification.
• Air connections for 5/32 in. (4 mm) O.D. plastic tubing.
• Molded plastic construction with neoprene diaphragms, stainless
steel lever.
• In-line mounting, or wall or panel mounting with provided metal
spring clip.
RP670 Typical Piping
Type: Pneumatic Switching Relay
Dimensions, Approximate: 1 1/2 in. diameter x 2 1/4 in. deep
(38 mm diameter x 56 mm deep)
Air Connections: Barb fittings 5/32 in. (4 mm) O.D. plastic tubing
Capacity: 0.039 scfm at 1 psi differential (18 mL/s at 5 kPa differential)
Operating Humidity Range (% RH): 5 to 95% RH
Temperature Range: 0 F to 140 F (-18 C to +60 C)
Maximum Safe Operating Pressure: 30 psi (205 kPa)
M
MB
RESTRICTOR
RESTRICTOR
COIL
COIL
3
6
7
8
6
7
8
CONNECTED
COMMON
DISCONNECTED
CONNECTED
COMMON
DISCONNECTED
DISCHARGE
LOW LIMIT
DISCHARGE
LOW LIMIT
M2798
13/18 psi
(90/125 kPa)
Product Number Operation
Switching Occurs Between
Pressures
Description Includes(psi) (kPa)
RP670A1001 SPDT relay 3 and 7 psi 20 and 50 kPa Pneumatic Switching Relay with
SPDT switching
14003030-001, 1 1/2 in. Mounting Clip
for Mounting relay to wall or panel
RP670A1019 SPDT relay 13 and 17 psi 90 and 120 kPa Pneumatic Switching Relay with
SPDT switching
14003030-001, 1 1/2 in. Mounting Clip
for Mounting relay to wall or panel
RP670B1009 DPDT relay 3 and 7 psi 20 and 50 kPa Pneumatic Switching Relay with
DPDT switching
14003030-001, 1 1/2 in. Mounting Clip
for Mounting relay to wall or panel
RP670B1017 DPDT relay 13 and 17 psi 90 and 120 kPa Pneumatic Switching Relay with
DPDT switching
14003030-001, 1 1/2 in. Mounting Clip
for Mounting relay to wall or panel
RP670B1066 DPDT relay 18 and 22 psi 124 and 152 kPa Pneumatic Switching Relay with
DPDT switching
14003030-001, 1 1/2 in. Mounting Clip
for Mounting relay to wall or panel
RP670B1074 DPDT relay 20 and 25 psi 140 and 175 kPa Pneumatic Switching Relay with
DPDT switching
14003030-001, 1 1/2 in. Mounting Clip
for Mounting relay to wall or panel
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