Cooling Water service
Service Selection

Strainers for Cooling Water Service

Which strainers configuration suits Cooling Water, in which material, to which standard — from real service data, with the pitfalls flagged.

Which strainers for Cooling Water?

Y-strainer - Essential before heat exchangers, condensers, and control valves Typical service window: 1–16 bar, 10–50°C (open circuit); up to 90°C (closed loop).

Recommended Configurations

Y-strainer

Essential before heat exchangers, condensers, and control valves

Body Material for Cooling Water

Rated from real compatibility data - click any material for the full decision page.

Governing Standards for Cooling Water Service

ASME B16.34AWWA C504 (butterfly)AWWA C509 (gate)EN 1171 (CI gate valves)

What to Avoid in Cooling Water Service

  • Unlined cast iron valves in biocide-treated or chlorinated cooling water
  • Bronze/brass valves where zinc dezincification is a risk (low pH, high flow)
  • PTFE-seated ball valves where biofouling on ball seat is a risk

Service Considerations

  • Velocity below 1 m/s in carbon steel - deposits and under-deposit corrosion
  • Y-strainer mesh sizing: 3mm mesh for cooling tower water, 1mm before instruments
  • Biofouling: full-bore ball valves allow easier pigging/flushing
  • Legionella risk in open cooling towers - no dead-legs in cooling water design

Other valve types for Cooling Water

Strainers for other services

Reviewed by Process Engineering, Vajra Industrial SolutionsDiscipline: Process & Fluid Service EngineeringLast reviewed: 20 June 2026

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