Q&A Resource

What does WOG stand for on the side of my valves?

Quick Answer

KEY TAKEAWAYS

For example, if a valve is marked 200 WOG, it means the valve can safely handle up to 200 PSI for water, oil, or gas applications. This rating applies to fluids that are not corrosive or highly viscous and is typically used for general-purpose valves like Balls, Gates, or Check valves.

Important Considerations:

Non-Shock Service: The WOG rating assumes steady flow without pressure surges or temperature extremes.
Temperature Impact: The pressure tolerance may decrease as the temperature increases, so always check the valve's pressure-temperature chart for specific operating conditions.
Not for Steam: WOG-rated valves are not typically designed for steam. For steam applications, look for valves with a WSP (Working Steam Pressure) or SWP (Steam Working Pressure) rating.

If you're specifying a valve for critical applications, always verify the valve's materials and ratings to ensure compatibility with your process media and conditions.