©Johnstone Supply eCatalog 216

COMMERCIAL CONTROLS Pneumatics

Capacity Relay • Provides increased capacity of the branch line pressure to the final control device • Molded plastic with neoprene diaphragms and sharp-barb connections • Includes 1-1/2" mounting clip for mounting to wall or panel

Specifications: • Operating range: 0 to 18 PSI • Maximum supply air: 30 PSI • Air capacity: 0.039 SCFM @ 1 PSI differential • Dimensions: 1-1/2" diameter x 1-1/2" L

Each

Order # Mfg. #

L40-044 RP970A1008

295.00

Switching Relays • Blocks, diverts or bleeds pneumatic air lines when pilot pressure is changed from one specific value to another • For Day-Night, Summer-Winter, Start-Stop, On-Off-Auto and other multiple condition systems where control sequence is changed as conditions change • Molded plastic construction with neoprene diaphragms, stainless steel lever and music wire spring

• Metal spring clip included for in-line, wall or panel mounting Specifications: • Main operating range: 0 to 22 PSI • Maximum supply air: 30 PSI • Air capacity: 0.039 SCFM @ 1 PSI differential • Dimensions: 1-1/2" D x 2-1/4" L

Each

Order # Mfg. #

Switch Action

Switching Pressure 3 PSI and 7 PSI 13 PSI and 17 PSI 3 PSI and 7 PSI 13 PSI and 17 PSI

L38-524

RP670A1001

SPDT SPDT DPDT DPDT

325.00 285.00 619.00 595.00

L40-035 RP670A1019 L40-036 RP670B1009

L40-037

RP670B1017

Ratio Relay • Controls pneumatic valves or damper actuators in sequence from a single thermostat • Produces a modulating pressure output, proportional in a fixed ratio to pilot input changes • Molded plastic construction with neoprene diaphragms and stainless steel valve seats • 100 mesh stainless steel screens in main and branch ports

• Mounting clip provided Specifications: • Pilot start point: 0 to 10 PSI, adjustable • Output: 3 to 13 PSI range over 3 PSI pilot input span • Main operating: 18 PSI • Pilot operating: 3 to 15 PSI • Air capacity: 0.039 SCFM @ 1 PSI differential • Dimensions: 2" diameter x 2-5/8" L

Each

Order # Mfg. #

L38-531 RP971A1007

385.00

Electric/Pneumatic Relay • Electrically operated pneumatic switch interlocks an electrical system and a pneumatic control system • Usable as a diverting relay, a selector relay or a stop and bleed relay • Mounts and operates in any position • Available with lead wires or junction box

• Surface mounted model is UL listed and panel mounted model is UL recognized component and CSA recognized Specifications: • Maximum supply air: 50 PSI • Air capacity: 0.42 SCFM • Capacity index: 0.075 Cv • Power consumption: 12.5VA inrush, 7.1VA holding

Each

Order # Mfg. #

Type

Volts

Dimensions

L38-518 RP418A1107 Surface Mounted

120V @ 60 Hz

3-3/16” W x 2-7/8” H x 1-1/4” D

229.00

415

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