©Johnstone Supply eCatalog 216

HYDRONICS Controls

Flow Switches • For use as automatic control in air conditioning, heating, water systems and process work • SPDT Switch • Primary wetted parts are brass • L37-332 and L38-791 used principally on water lines, installed in tee or welding neck in horizontal pipe up to 6", with 1" NPT threaded connection pipe size • L37-333 used in areas of high humidity and outdoor installation, installed in tee or welding neck in horizontal pipe up to 6", with 1" threaded connection pipe size • L37-333 is NEMA 4X rated – water-tight, dust tight, corrosion-resistant • L37-415 used for low flow rate applications, 1/2" pipe size, NEMA 1 rated • L86-133 designed for industrial use, 1-1/4" pipe size • L40-232 is designed for industrial use in high humidity and outdoor installations, with 1-1/4" NPT threaded connection pipe size and a 6" paddle

• L40-232 is NEMA 4X rated – water-tight, dust tight, corrosion-resistant • L40-232 includes a magnetic switching mechanism that eliminates the need for bellows, and includes a sensitivity adjusting screw • L37-636 is suitable for a wide range of applications, with 3/4" pipe size • L40-231 is designed for high sensitivity applications, with 1" NPT connection pipe size, and inline configuration that eliminates the need for a pipe tee • L40-231 has a high flow capacity, sensitivity adjusting screw, and a completely sealed switch compartment WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

A

B

C

D

E

F

G

Fig. Order #

Mfg. #

Type

GPM Min. Flow

GPM Min. No Flow GPM Max. Flow

GPM Max. No Flow Max. Fluid Temp.

Max. Pressure

L37-332 L38-791 L37-333 L37-415 L86-133 L40-232 L37-636 L40-231

A A B C D E F G

120611 FS-251

6.00 6.00 4.90 0.41 4.80 4.80 1.50 0.12

3.60 3.60 3.40 0.24 3.00 3.00 1.10 0.06

10.20 10.20 17.60

9.20 9.20 1.28 5.90 5.90 15.00 10.00

300°F 300°F 225°F 225°F 300°F 300°F 250°F 225°F

150 PSI 150 PSI 150 PSI 100 PSI 300 PSI 300 PSI 150 PSI 100 PSI

114650 FS4-3-RP-T 120610 FS-254 113200 FS1 119700 FS7-4 120201 FS7-4W

1.81 7.70 7.70

114760

FS5

15.00

115600 FS6-1

2.50

1.50

Flow Switch Replacement Paddles WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Order #

Mfg. #

Model #

Description

L38-427 L38-792 L38-793

310451 336101 336700

FS4-15SS FS4-15RP

Stainless Steel Paddles

Reinforced Stainless Steel Paddles

FS7-28

Bronze Paddles

Flow Switch • Starts or stops equipment when a flow or no flow condition occurs • For use on 1" to 8" diameter pipe • NEMA 1 enclosure, stainless steel paddles and trip rods

• 1" NPT connection • SPDT switch action WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Order #

Mfg. #

Min. Fluid Temp.

Max. Pressure

L41-615

IFS01BF-1

250°F

250 PSI

518

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