Product Name: Compression Spring (Part No. 05054119)

Description:
This component is a precision compression spring with wire diameter of 0.105 inches, outer diameter of 0.72 inches, and free length of 1.50 inches . It is a critical internal component manufactured from high‑grade spring steel or stainless steel to provide consistent elastic force under repetitive compression cycles. The spring features precise coil geometry to ensure uniform force distribution and reliable mechanical response across millions of cycles .

Applications:

• Pneumatic Actuator (NC): Serves as the primary return spring in the normally closed pneumatic actuator assembly (KMT #10177855). Six springs (quantity 6) are installed in each actuator to force the valve stem back to the closed position when air pressure is released .

• Valve Control: Provides the necessary mechanical force for proper valve seating, sealing, and directional control within the pneumatic on/off valve assembly of waterjet cutting systems .

Features:

• High Fatigue Resistance: Constructed from high‑tensile material with advanced heat treatment processes to withstand millions of pressure cycles without permanent deformation or loss of spring force .

• Corrosion Resistant: Stainless steel or coated carbon steel construction resists degradation from water, abrasive dust, and hydraulic fluids in harsh waterjet environments .

• Precision Winding: Manufactured to exact dimensional tolerances (wire diameter 0.105", OD 0.72", free length 1.50") for consistent spring rate and reliable fit in the actuator assembly .

• Critical Function: Essential for fail‑safe operation; in a normally closed pneumatic actuator, these springs ensure the valve remains closed when no air pressure is applied .

Maintenance:

• Wear Part Classification: This compression spring is classified as a typical wear part. Continuous compression, repetitive motion, pressure cycles, and mechanical stress gradually diminish its elasticity, leading to reduced strength, permanent set (shortening), or even fracture over time .

• Failure Diagnosis: Symptoms of a worn or fatigued spring include sluggish valve response, incomplete closing of the waterjet (water leaks from mixing tube when valve should be off), erratic actuator movement, or pressure fluctuations .

• Inspection: During actuator service or major pump overhauls, inspect each spring for signs of permanent deformation (shortening compared to the 1.50" free length specification), cracking, corrosion, or loss of tension. Replace all six springs as a set if any damage is detected .

• Replacement: When replacing, use a complete set of six new springs (the quantity used per actuator). Do not mix old and new springs, as uneven spring rates will cause unbalanced actuator force .

• Scheduled Preventive Maintenance: It is strongly recommended to replace these springs at regular intervals based on operating hours or during actuator rebuilds to prevent unplanned downtime .

• Full Depressurization (Critical): Before servicing the pneumatic actuator, fully depressurize the waterjet system (high‑pressure water, hydraulic system, and air supply) and follow lockout/tagout procedures.

• Cross‑Reference Numbers: Replaces OEM KMT #05054119, WSI #VL05054119A, and the discontinued VL10177798. This spring is used in both 60K actuators (VL10177855) and 90K actuators (VL20474154) .