All Q&A Resources

Water, Oil, and Gas. Marking such as 200 WOG or 1000 WOG cast or stamped on a valve body, it indicates the valve's maximum allowable pressure rating (PSI) for general non-shock water, oil, and gas service at ambient temperatures.

Both are metal surface treatment processes commonly used on stainless steel. Pickling cleans and restores the surface, while passivation improves the surface's ability to resist corrosion.

Restrained pipes are fixed to prevent movement, while unrestrained pipes are free to expand or shift. The right choice depends on pressure, temperature, and system design.

Most solenoid valves need power to actuate, but some include manual overrides or default positions that allow limited operation without electricity.

Solenoid valve mounting depends on design. Many require coil-up orientation, while some allow other positions. Incorrect mounting can cause failure.

Put simply, a throttling valve is not a type of valve, but rather, an industry term that refers to how a valve is used. The term throttling valve refers to any valve that's operated in a way that partially restricts the flow of media.

Most valves should be inspected every 6–18 months and tested every 2–5 years, with shorter intervals for critical, high-cycle, or harsh service.

No, not all butterfly valves are bi-directional. Because bi-directional capability varies by valve design, it should never be assumed without verifying the manufacturer's documentation.

Butterfly valves are classified as concentric, double offset, or triple offset, each differing in sealing method, pressure capability, and service conditions.