Furnas / Siemens / Hubbell · Class 69JF
69JF7LY
The four-port sibling of the 69MB. The manifold body carries the gauge, ASME relief valve, unloader line and tank tapping, so the switch becomes the whole control head on a shop recip.
Specifications
- Action
- Standard — contacts open on rising pressure
- Adjustable range
- Common builds 95/125 and 120/150
- Differential
- Adjustable on most JF builds, typically 20–40 psi (adjustable)
- Factory settings
- Cut-in 95 psi / cut-out 125 psi typical
- Ports
- Four-port manifold: 1/4 in. NPT tank inlet, gauge, relief valve and unloader
- Unloader
- Integral, with pilot line fitting
- Lever / disconnect
- Auto/off lever on LY builds
- Enclosure
- NEMA 1
- Temperature
- -22 °F to 257 °F
Electrical
- DPST power circuit, roughly 15–20 A depending on build
- Two conduit knockouts
Size against motor full-load amps with the motor amperage calculator, and check feeder sizing with the voltage drop calculator.
Adjustment
- Set cut-out with the range nut, then the differential nut for the gap.
- Because the relief valve threads into the same manifold, verify it after every switch swap — cross-threading here is common.
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
- Shop recips where the switch is the control manifold
- Replacing a leaking manifold and switch as one assembly
Watch out
- The manifold is a leak path. Use thread sealant rated for air, not tape fragments that end up in the unloader.
Cross-references
- Lefoo LF10 four-port build
- Square D 9013FHG with M4 manifold accessory