How do I select the right valve type?

Select valve type based on: 1) Primary function (on/off vs modulating control), 2) Flow characteristic needed (linear, equal percentage, quick-open), 3) Pressure and temperature requirements, 4) Fluid type (corrosive, abrasive, viscous), 5) Space and installation constraints. Gate valves for full-open isolation, globe valves for throttling, ball valves for quick on/off, butterfly valves for large diameters.

When should I use a gate valve vs a globe valve?

Gate valves: Use for isolation (full open/full closed) with minimal pressure drop. Not for throttling. Best for: water distribution, steam lines, minimal flow restriction. Globe valves: Use for throttling and flow control. Better for precise flow regulation. Higher pressure drop but better control. Best for: control applications, steam conditioning, modulating service.

What are the advantages of ball valves?

Ball valves offer: 1) Quick 90° operation (quarter-turn), 2) Low pressure drop when fully open, 3) Tight shut-off (blowout-proof stem), 4) Easy automation with pneumatic/electric actuators, 5) Compact design, 6) Available in full bore (minimal restriction) or reduced bore. Best for: on/off service, automation, water, oil, gas, chemical service.

When are butterfly valves preferred over gate valves?

Butterfly valves are preferred for: 1) Large diameters (over DN300 / 12") where gate valves become expensive and heavy, 2) Space-constrained installations (wafer/lug style), 3) Low-pressure applications (up to PN16/Class 150 typically), 4) Pigging service in pipelines, 5) Handling slurries and wastewater. Gate valves preferred for: high-pressure Class 300+, tight shut-off requirements, bi-directional sealing.

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Quick Reference: Valve Type Comparison

Criteria	Gate	Globe	Ball	Butterfly	Check
On/Off Service	★★★★★	★★★	★★★★★	★★★★	★
Throttling/Control	★	★★★★★	★★★	★★★	★
Low Pressure Drop	★★★★★	★★★	★★★★★	★★★★	★★★
Large Sizes (DN200+)	★★★	★	★★★	★★★★★	★★★★
High Pressure	★★★★★	★★★★	★★★	★	★★★★
Easy Automation	★★★	★★★	★★★★★	★★★★★	★★★
Corrosive Service	★★★	★★★	★★★★	★★★	★★★
Slurry/Solids	★★★	★	★★★	★★★★	★
Cost (Small Size)	★★★	★★★	★★★★	★★★★★	★★★★
Cost (Large Size)	★	★	★	★★★★★	★★★★

Legend: ★★★★★ Excellent | ★★★★ Very Good | ★★★ Good | ★★ Fair | ★ Poor

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Quick Reference: Valve Type Comparison