47828483 Inlet Valve Air Intake Valve Unloader Valve for Rotary Screw Air Compressor

Product Introduction

The 47828483 inlet valve is the intake control assembly that regulates how much atmospheric air enters the airend of a rotary screw air compressor. It combines the intake port, check/butterfly element, and actuator function to support no-load start, smooth loading, and clean unloading. A sticking or leaking valve causes hard startup, unstable pressure, failure to unload, and higher power draw—making it one of the most decisive control parts in scheduled compressor service.

Detailed Product Description

What It Controls

At startup the valve stays closed or nearly closed so the motor does not pull full air load. When the controller calls for load, pilot air or the actuator opens the element, letting air flow into the compression stage. During unloading it closes or throttles back, while blowdown releases trapped pressure so the machine can restart easily.

Key Benefits

• No-Load Start: Reduces starting current and mechanical shock on the drive train.
• Load/Unload Stability: Keeps pressure control steady under changing air demand.
• Backflow Check: Internal check element helps prevent reversal into the intake side at shutdown.
• Energy Saving: Limits unnecessary intake when the compressor runs unloaded.
• Also Called: inlet valve, air intake valve, suction valve, unloader valve, intake control valve, inlet valve assembly.

Common Applications

• Rotary screw air compressors with pneumatically controlled intake systems
• Industrial plants, workshops, and compressed air stations
• Compressor overhaul, intake system service, and valve rebuild
• Maintenance stock for compressor service teams