Midwest Control MD Series Motorized Ball Valve Drains

The Midwest Control MD Series Motorized Ball Valve Drain is designed to automatically remove condensate from compressed air systems without relying on a small solenoid orifice that can plug up at the worst possible time.

Condensate drains are not usually the most exciting part of a compressed air system, but they are one of those components you definitely notice when they stop working. Water left sitting in receivers, filters, separators, and piping can create corrosion, pressure drop, air quality problems, and a mess on the floor.

The MD Series uses a motorized ball valve design for dependable automatic discharge. Instead of depending on a tiny passage to move condensate, the ball valve opens to help clear water, oil, scale, rust, and other debris that can cause standard drains to clog.

Why Use a Motorized Ball Valve Drain?

A motorized ball valve drain is a good fit when the drain point is dirty, oily, or prone to debris. This makes it useful on air receivers, aftercoolers, moisture separators, filter housings, drip legs, and other compressed air condensate collection points.

The MD Series includes a microprocessor-based controller with 10 pre-programmed cycle settings, plus adjustable interval and discharge timing from 1 second to 999 hours. That gives you flexibility, whether the system needs a quick periodic purge or a longer timed discharge cycle.

Key Features

• Motorized ball valve design for non-clogging condensate discharge
• Forged brass valve rated up to 600 PSI
• IP65 / NEMA 4 rated enclosure for wet and demanding environments
• Fire-resistant ABS housing
• 10 pre-programmed cycle settings
• Adjustable interval and discharge timing from 1 second to 999 hours
• Manual test switch and LED status indicators
• Mounts in any position for easier installation
• Automatically closes during power loss to help prevent unintended discharge
• Available for 115V and 230V systems
• Operating temperature range of 34°F to 131°F
• UL approved and life-tested for 200,000+ cycles

Where These Drains Are Commonly Used

Midwest Control MD Series drains are a practical option for compressed air systems that need reliable timed condensate removal. They are especially useful where condensate may contain pipe scale, compressor oil, dirt, or other contaminants that can shorten the life of smaller solenoid-style drains.

Choosing the Right Size

The correct model is usually selected by connection size and the amount of condensate that needs to be discharged. The MD-50BV is the 1/2" model, the MD-75BV is the 3/4" model, and the MD-100BV is the 1" model.

For smaller receiver and filter drain points, 1/2" is often enough. Larger receiver drains, separator drains, or higher-flow discharge points may justify stepping up to 3/4" or 1".

Bottom Line

The Midwest Control MD Series is a solid choice when you want a rugged, timed condensate drain with the larger opening of a ball valve. For compressed air systems dealing with dirty condensate, oil carryover, rust, or scale, a motorized ball valve drain can be a smart upgrade over a basic solenoid drain.