Sullair Compression Spring Replacement – 250042-383

The Sullair 250042-383 Compression Spring (109 lb Outer) is a genuine OEM mechanical component designed for selected Sullair rotary screw air compressors. This compression spring is an essential part of the inlet valve assembly, providing the required spring force for proper valve movement and air intake regulation. It works together with other inlet valve components to maintain accurate compressor loading and unloading performance, ensuring efficient airflow control and reliable compressor operation.

Manufactured according to Sullair OEM specifications, the 250042-383 Compression Spring is engineered for consistent force output, durability, and resistance to fatigue under continuous industrial operating conditions. Proper spring performance helps maintain inlet valve stability, prevents control issues, and supports smooth compressor operation in demanding environments.

Features

• Genuine Sullair OEM replacement component
• Part Number: 250042-383
• Part Name: Compression Spring 109 lb Outer
• Designed for compressor inlet valve assemblies
• Provides controlled spring force for valve operation
• High fatigue resistance for long service life
• Precision-manufactured for OEM fitment
• Suitable for heavy-duty industrial compressor applications

Applications

• Sullair Rotary Screw Air Compressors
• Inlet Valve Assembly Systems
• Air Intake Control Mechanisms
• Compressor Repair and Overhaul Applications
• Preventive Maintenance Service

The part is listed in Sullair parts documentation as “Spring, Comp. 109 lbs Outer” and is used in the 8-inch inlet valve assembly along with the 144 lb intermediate spring.

Benefits

• Restores proper inlet valve operation
• Maintains accurate compressor loading control
• Improves compressor efficiency and reliability
• Reduces risk of valve malfunction
• Helps prevent unexpected downtime
• Extends service life of inlet valve components

Specifications

• Part Name: Compression Spring (Outer)
• Part Number: 250042-383
• Brand: Sullair
• Spring Rating: 109 lb Outer
• Component Type: Inlet Valve Spring
• Application: Sullair compressor inlet valve assemblies
• Compatibility: Selected Sullair rotary screw compressor models (verify model and serial number before installation)

Maintenance Recommendation:
Inspect the inlet valve spring during compressor servicing. Replace the spring if it shows signs of fatigue, corrosion, deformation, or loss of tension to maintain proper compressor control and performance.