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 offers 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. Valves ship from our manufacturer partner; the current lead-time status is shown on each product page. No minimum order.

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Brass ball valves are the general-service choice for water, oil, gas and HVAC lines (600 WOG through 2 in.; 400 WOG in 3 and 4 in., per the manufacturer). 316 stainless steel and PVC/CPVC ball valves are selected where brass is not suitable for the media or temperature. Mini ball valves — in brass or 316 SS — serve tight-space shutoff needs in instrument panels, metering systems, and control skids. Media suitability depends on the specific fluid, concentration, temperature, pressure and seat/seal materials — tell us your service conditions and we will confirm suitability with the manufacturer.

Certifications Available

Certification marks vary by model and are manufacturer designations. Midland's catalog marks its brass full-port line (940171–940181) UL 842/258/125 and FM, its male × female line (948170–948177) UL 842/258, and its 943201 gas valve CSA/AGA 3.88 for 5 psig gas. Apex has not independently verified listing certificates or file numbers for any of these models — ask us for the manufacturer's documentation before specifying a valve for gas or code-governed service. Locking-handle variants accept a padlock for lockout/tagout 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 is the most cost-effective choice for general water, air, oil and gas service within its printed rating. 316 stainless steel or PVC/CPVC are selected where brass is not suitable for the media, temperature or pressure. Media suitability depends on the specific fluid, concentration, temperature, pressure and seat/seal materials — tell us your service conditions and we will confirm suitability with the manufacturer. 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.