Hydraulic Pressure Control Valves - 50-01KO Anti-Cavitation Pressure Relief & Sustaining Valve | Cla-Val

Cla-Val 50-01KO

Hydraulic pressure relief and sustaining valve with KO anti-cavitation trim. Pilot-operated, modulating type, designed to maintain a stable upstream pressure. Used for pressure relief, sustaining, back pressure, or unloading functions in by-pass lines. Suitable for water and compatible process fluids.

When to Specify KO Trim

The KO version is selected when high differential pressure (ΔP) is present and there is risk of cavitation, noise, seat erosion, or trim wear. Selection should be based on cavitation charts and actual flow/pressure data. KO trim reduces internal energy dissipation and extends service life under severe conditions.

Typical Applications

• High head pump by-pass lines
• Pressure reduction in potable water networks
• Pipeline overpressure protection
• Back pressure control in industrial water systems
• Unloading lines in pumping stations

Operation

When upstream pressure exceeds the set point, the pilot opens and the main valve modulates to relieve flow. KO trim minimizes cavitation and internal wear under high ΔP conditions, improving operational stability.

Selection Criteria

• Inlet pressure and back pressure
• Relief flow rate
• Relief set point
• Continuous or intermittent operation
• Cavitation risk
• Body, trim, and elastomer materials

FAQ

Does it replace a safety valve?
No. This is a pressure control valve, not a certified safety relief valve per PED or ASME standards.

Why not standard 50-01?
The 50-01KO is specified when ΔP may cause cavitation or accelerated trim wear. Standard 50-01 is used for moderate ΔP without cavitation risk.

Suitable media?
Water and fluids compatible with construction materials. For aggressive or special media, consult material compatibility and sealing options.