Gardner Denver load solenoid (SV1)

Pilot valve for the inlet valve and blowdown on Electra-Saver, ESM and AirSmart-controlled units.

Also called: SV1 · AirSmart load valve · GD Electra-Saver solenoid

How it works

On turn-valve Electra-Saver machines the load solenoid works with the turn-valve actuator; on fixed-speed ESM units it simply opens/closes the inlet valve pilot circuit and triggers blowdown at unload.

Coil resistance (typical, cold DC)

Typical values for the stated wattage class. Always compare against the coil tag. Open circuit = burnt winding; near 0 Ω = shorted turns.

Parts you can order

• Gardner Denver (OEM)

  Load / blowdown solenoid

  Serial-specific (200E / 2116 families)

  $140 – $430

Field test procedure

1. AirSmart controller has an output test — force SV1 and confirm 120 V at the coil.
2. Check the pilot air filter/regulator; GD packages run a small regulator that drifts low with age.

Symptoms & probable causes

• Capacity stuck at part load
  Turn valve actuator or its pilot solenoid, not the main load solenoid.