Gate Valves

Gate valves are multi-turn isolation valves that use a wedge-shaped gate that rises out of (or drops into) the flow path to open or close the valve. Unlike ball valves, gate valves are not quarter-turn — they require multiple rotations of the handwheel to fully open or close. This makes them unsuitable for frequent cycling but ideal as infrequently operated isolation valves in water mains, fire protection systems, and buried service lines where a visual position indicator is not needed.

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Apex Flow Solutions carries brass gate valves for general water service, irrigation and plumbing applications. Confirm the valve’s pressure rating, materials, connection type and any project-specific listing or lead-free requirements before selection.

Gate Valve vs. Ball Valve

Gate valves offer a straight-through, full-bore flow path with minimal turbulence when fully open — matching the flow characteristics of ball valves. However, gate valves should never be used partially open (throttled), as the gate vibrates and damages the seat under partial-flow conditions. Ball valves are preferred for frequent on/off service; gate valves are best suited for long-term isolation positions that are rarely operated. See our detailed Gate Valve vs. Ball Valve comparison guide.

Related Technical Resources

Frequently Asked Questions

When should I use a gate valve instead of a ball valve?

Gate valves are best suited for infrequently operated isolation service — main shutoffs on water lines, irrigation system headers, and buried service connections that are opened fully and left that way for extended periods. Ball valves are preferred for any application requiring frequent cycling, quick shutoff, or visual position indication. If you need to operate the valve more than a few times a year, a ball valve is the more durable and reliable choice. See our Gate Valve vs. Ball Valve guide for a side-by-side comparison.

Can I use a gate valve to throttle or regulate flow?

No — gate valves must never be used in a partially open position for flow throttling. When the gate is partially raised, the high-velocity flow across the partially exposed wedge causes vibration that rapidly erodes and damages both the gate and the seat, leading to premature valve failure and leakage. Gate valves are designed for fully open or fully closed service only. If you need to regulate or throttle flow, use a globe valve or a needle valve instead.

What does OS&Y mean on a gate valve?

OS&Y stands for Outside Screw and Yoke. The rising stem provides a visible indication of valve position. For fire-protection service, confirm that the specific valve carries every listing required by the project and that its installation complies with the applicable code edition and authority having jurisdiction. An OS&Y design alone does not establish a UL or FM listing.

Guides for Choosing

Need help picking or troubleshooting a gate valve? Gate Valve Selection Guide · Won't Close or Won't Open? · Handle Types · Post Indicator Valves (PIV)