Low-Noise Relief Valve

Product Overview

This valve is the low-noise relief type shown in the product image. The damped pilot stage and shrouded seat cut the high-frequency noise generated by cavitation at the seat.

Structure and Key Features

• Modular or subplate body with ports arranged to common mounting standards.
• Spools are matched and lapped, keeping internal leakage low when closed.
• Adjustment is lockable so the setting does not drift.

Specifications and Selection

Select by flow range rather than pressure rating alone, and avoid continuous operation at the relief point.

Applications

Hydraulic stations where noise reduction matters but unloading is not required.

Frequently Asked Questions

Whistling noise at the seat

Often caused by an oversized valve at low flow; reduce size or bypass surplus flow.