Hazardous Location Insertion Flow Switches

Safely activate and deactivate equipment in environments with flammable gases and combustible dust when your flow rate reaches a set point. They are UL listed and CSA certified for use in hazardous locations. These switches save you from disassembling your pipeline because you insert them into pipe tees or pipe outlets instead of mounting them inline. They actuate when your system’s liquid pushes the paddle into a set position. To change your set point, the paddle has multiple layers that you can remove. For the lowest set point, use the largest paddle that will fit your pipe. To increase your set point, loosen the locking washers and remove paddles. You can trim the paddles to fine-tune your set point. The smaller the paddle, the higher the setpoint.
They should be mounted vertically into a horizontal pipeline, so liquid pushes the paddle.
These switches are calibrated with water and air. They can also be used with other liquids and gases but may not measure accurately if their viscosity is significantly different.
SPDT (singe pole, double throw) switches can turn one device from off to on (normally open) or from on to off (normally closed).
DPDT (double pole, double throw) switches can either turn two devices from off to on (normally open) or on to off (normally closed).
For technical drawings and 3-D models, click on a part number.
Set Point Range | Max. Flow Rate | Conduit | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pipe Size | Thread Type | Gender | For Pipe Size | For Water and Oil, gpm | For Air and Inert Gas, scfm | For Water and Oil, gpm | For Air and Inert Gas | Max. Pressure | Temp. Range, °F | Max. Switching Current @ Voltage | Trade Size | Thread Type | Gender | Body Ht. | Each | |
SPDT | ||||||||||||||||
Brass Body | ||||||||||||||||
1 1/2 | NPT | Male | 1 1/2 2 4 12 20 | 3 to 7 4 to 15 12 to 95 140 to 900 400 to 2,400 | 17 to 32 13 to 65 50 to 400 800 to 3,450 2,850 to 10,000 | 55 97 391 3,525 9,792 | Not Rated | 1000 psi @ 70° F | -4° to 275° | 5 A @ 125 V AC 5 A @ 250 V AC | 3/4 | NPT | Female | 8" | 00000000 | 0000000 |
316 Stainless Steel Body | ||||||||||||||||
1 1/2 | NPT | Male | 1 1/2 2 4 12 20 | 3 to 7 4 to 15 12 to 95 140 to 900 400 to 2,400 | 17 to 32 13 to 65 50 to 400 800 to 3,450 2,850 to 10,000 | 55 97 391 3,525 9,792 | Not Rated | 2000 psi @ 70° F | -4° to 275° | 5 A @ 125 V AC 5 A @ 250 V AC | 3/4 | NPT | Female | 8" | 00000000 | 00000000 |
DPDT | ||||||||||||||||
Brass Body | ||||||||||||||||
1 1/2 | NPT | Male | 1 1/2 2 4 12 20 | 3 to 7 4 to 15 12 to 95 140 to 900 400 to 2,400 | 17 to 32 13 to 65 50 to 400 800 to 3,450 2,850 to 10,000 | 55 97 391 3,525 9,792 | Not Rated | 1000 psi @ 70° F | -4° to 275° | 5 A @ 125 V AC 5 A @ 250 V AC | 3/4 | NPT | Female | 8" | 00000000 | 000000 |
316 Stainless Steel Body | ||||||||||||||||
1 1/2 | NPT | Male | 1 1/2 2 4 12 20 | 3 to 7 4 to 15 12 to 95 140 to 900 400 to 2,400 | 17 to 32 13 to 65 50 to 400 800 to 3,450 2,850 to 10,000 | 55 97 391 3,525 9,792 | Not Rated | 2000 psi @ 70° F | -4° to 275° | 5 A @ 125 V AC 5 A @ 250 V AC | 3/4 | NPT | Female | 8" | 00000000 | 00000000 |