Conrader Piloted Unloader Check Valve — N-Series, 20–250 PSI
The Conrader N-Series Piloted Unloader Check Valve is an all-in-one compressor control that combines a pilot valve, discharge unloader valve, and check valve in a single rugged brass body. It lets a gas-engine or electric-motor-driven air compressor run continuously: the check valve prevents backflow as pressure builds, and when downstream pressure reaches the unload setting the pilot opens to vent the compressor head and pump unloaded. As air is used and pressure drops to the load setting, the valve re-loads automatically and the cycle repeats.
Key specifications
- Type: Combination piloted unloader + check valve (3-in-1 control)
- Operating pressure: 20–250 PSI
- Operating temperature range: -15°F to 400°F
- Body material: Brass with stainless steel check ball
- Connections: Choose your inlet × outlet configuration below (compression tube, SAE 45° male flare, MNPT, and FNPT options)
- Application: Continuous-run air compressors, gas engine and electric motor driven
Choosing your configuration
Each option in the dropdown is a specific Conrader part number matched to an inlet × outlet connection. Select the configuration that fits your plumbing — for example 1/2" male flare × 1/2" MNPT, 1/2" compression × 3/8" FNPT, or 3/8" FNPT × 1/2" MNPT.
Typical applications
Used on reciprocating air compressors and pump packages where continuous (constant-run) operation is preferred over start/stop control — including gas-engine-driven field compressors and electric-motor-driven shop and industrial units.
Built for reliable, automatic load/unload control, the Conrader N-Series piloted unloader check valve delivers durable brass construction, a wide 20–250 PSI operating range, and multiple inlet × outlet connection choices to suit virtually any compressor installation.
NOTE: Actual product may be different from pictured!
Financing Options
Financing Options
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