Square D / Pumptrol · Class 9013 Type G
9013GHG series
The commercial/light-industrial Pumptrol. Unlike the FHG, the Type G has a true adjustable differential screw as well as the range adjustment, higher electrical ratings for direct motor control, and a 3/8 in. NPT port.
Specifications
- Action
- Standard — contacts open on rising pressure
- Adjustable range
- Up to 300 psi depending on build
- Differential
- Adjustable via a dedicated differential screw (adjustable)
- Factory settings
- Varies by catalog number — set on the bench before install
- Ports
- 3/8 in. female NPT standard, other options available
- Unloader
- Optional two-way relief (unloader) valve
- Lever / disconnect
- Depends on build; industrial installs usually omit it and use the starter
- Enclosure
- NEMA 1 standard; NEMA 3R and NEMA 4 optional
- Temperature
- -22 °F to 257 °F
Electrical
- Higher horsepower ratings than Type F for direct control of pump and compressor motors
- 2-pole snap-action contacts, vertical for easy inspection
- Two 1/2 in. NPT conduit entries
Size against motor full-load amps with the motor amperage calculator, and check feeder sizing with the voltage drop calculator.
Adjustment
- Set the cut-out with the range nut first, then open or close the gap with the differential screw.
- Clockwise on the differential screw widens the gap between cut-in and cut-out.
- Re-check cut-out after every differential change — the two adjustments interact on most builds.
Before you open the cover
Kill power at the disconnect and lock out. Bleed the tank to 0 psi. Never set cut-out above the tank data-plate MAWP. Verify your numbers first in the cut-in / cut-out calculator.
Best fit
- High-pressure recips above the 230 psi FHG ceiling
- Jobs where you must dial in the differential to fix short cycling
- Wash-down or outdoor locations needing NEMA 4
Watch out
- 3/8 in. port — you will need a bushing to land it on 1/4 in. compressor plumbing.
- Adjustable differential invites over-adjustment. Log the original settings before you touch anything.
Cross-references
- Condor MDR 2 (equivalent adjustable-differential concept, metric ports)