Seal Backup Screw 1-12945 for WaterJet Pump High Pressure Spare Parts

The Seal Backup Screw 1-12945 is a precision fastening component used in Waterjet Intensifier pump sealing systems. Its main function is to secure and support seal backup components, ensuring stable positioning and reliable sealing performance under ultra-high-pressure operating conditions.

This screw works together with backup rings, seal housings, and sealing assemblies to maintain correct seal alignment, prevent component movement, and support stable pressure retention during pump operation. It is designed to withstand high clamping force, vibration, and repeated maintenance cycles.
A high-quality seal backup screw is essential for maintaining sealing integrity, reducing leakage risks, and ensuring long-term reliability of the intensifier system.

Is Seal Backup Screw 1-12945 a Wear Part?

Yes — the Seal Backup Screw 1-12945 is considered a semi-wear fastening part.
Although it is made from durable high-strength material, it continuously operates under pressure load, vibration, torque stress, and repeated installation cycles. Over time, it may experience thread wear, stretching, corrosion, or fatigue.
If not replaced when damaged or worn, it can lead to loose sealing components, leakage, unstable pressure retention, and accelerated wear of related parts.
Regular inspection during maintenance is strongly recommended.