Ball Valves

Ball valves are the most widely used quarter-turn shutoff valve in industrial, commercial, and residential piping systems. Named for the spherical ball that rotates 90° to open or close the flow path, they offer instant on/off control, a leak-tight seal, and negligible pressure drop when fully open — making them the preferred choice over gate valves and globe valves in most modern systems.

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Apex Flow Solutions stocks a comprehensive range of brass, stainless steel, PVC, and mini ball valves from Midland Industries — one of North America's leading manufacturers of forged brass and specialty valves. Every valve ships from our inventory, with no minimum order and fast shipping to contractors, engineers, and maintenance buyers across the U.S.

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Brass ball valves are the standard for water, oil, gas, and HVAC applications rated at 600 WOG (Water, Oil, Gas). Stainless steel ball valves extend service into corrosive chemical, high-temperature, and hygienic applications. PVC and CPVC ball valves are the go-to for water treatment, chemical dosing, and corrosive-fluid piping where metal would corrode. Mini ball valves — in brass or 316 SS — serve tight-space shutoff needs in instrument panels, chemical metering systems, and control skids.

Certifications Available

Select models carry UL Listing for gas service, AGA/CGA approval for natural gas and propane shutoff, and CSA B125.3 certification for Canadian plumbing code compliance. Locking-handle variants support OSHA 29 CFR 1910.147 lockout/tagout (LOTO) energy isolation programs.

Related Technical Resources

Frequently Asked Questions

What is the difference between a full-port and standard-port ball valve?

A full-port (full-bore) ball valve has a ball opening that matches the pipe's inside diameter, so flow passes straight through with virtually no restriction or pressure drop. A standard-port valve uses a smaller ball opening — typically one pipe size down — which reduces cost and valve size but creates slightly higher pressure drop. Full-port valves are preferred wherever flow rate, pigging, or in-line cleaning matters; standard-port valves work fine for most isolation applications where pressure drop is not critical.

Which ball valve material is right for my application?

Brass handles water, air, oil, natural gas, and most HVAC fluids up to 600 WOG and is the most cost-effective choice for general service. Stainless steel (316 SS) is required for corrosive chemicals, chlorinated water, marine environments, food-grade, or hygienic service. PVC and CPVC are best for aggressive acids, caustics, and water treatment lines where metal corrosion is a concern. See our Ball Valve Materials Guide for a side-by-side comparison.

What does 600 WOG mean on a ball valve?

WOG stands for Water, Oil, Gas — the three fluid categories the valve is rated for. A 600 WOG rating means the valve is rated to 600 PSI working pressure for cold water, oil, and gas service at ambient temperature. Pressure ratings decrease at elevated temperatures, so always check the manufacturer's de-rating chart if your system runs above 100°F. See our WOG Valve Ratings Guide for a full explanation.