Harwil Q-4E Inline Flow Switch, 4 to 70 GPM, 1 in NPT, 300 psig
SKU PFS-QD-4E/4/C
Harwil Q-4E Inline Flow Switch Wide range, particle tolerant. The Harwil Q-4E is an inline flow switch covering 4 to 70 GPM in 1 inch line. Four individual drag disk options plus continuous adjustment give it a wide operating range, and it...
- Flow range
- See model configuration
- Pipe size
- See model configuration
- Body material
- Harwil Corporation
Product drawings
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Reference drawing
Product diagram
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Reference drawing
Electrical diagram
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Check the manufacturer drawings while you build.
- 1Duty
- 2Sensing element
- 3Model configuration
- 4Electrical
Pipe and target flow
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Pipe sizeChoose a pipe size to see its published operating choices.
Published sensing selection
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Pipe size and operating duty determine the sensing element.
Model configuration
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Electrical configuration
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Technical information
Description and specifications
Harwil Q-4E Inline Flow Switch
Wide range, particle tolerant.
The Harwil Q-4E is an inline flow switch covering 4 to 70 GPM in 1 inch line. Four individual drag disk options plus continuous adjustment give it a wide operating range, and it is built for use in particle contaminated fluids.
| Flow Range | 4 to 70 GPM |
|---|---|
| Line Pressure | To 300 psig |
| Temperature | 180 F continuous |
| Drag Disk Options | 4 individual options plus continuous adjustment |
| Pipe Size | 1 inch |
|---|---|
| Process Connection | NPT inline |
| Body Material | Brass |
| Switch Operation | SPDT or DPDT (QD-4E) |
|---|---|
| Switching Capacity | 15 amp (SPDT model) |
| Dry Circuit Option | Computer / PLC interface model available |
| Hazardous Area | Usable with Harwil intrinsically safe relay |
- 1 inch NPT inline installations
- Particle contaminated fluids
- Air conditioning systems
- Marine and stationary engines
Which orifice-paddle option do I need?
Four ranges are offered: 4 to 8 GPM, 6 to 20 GPM, 15 to 35 GPM, and 25 to 70 GPM. Pick the band your normal flow sits inside, then fine tune with the continuous adjustment.