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Automatic Drain Valves

automatic drain valve
Terminator Solenoid Electric Drain

Solenoid Electric Drain
The inexpensive and reliable Terminator electric automatic drain valve automatically removes condensate from your air system. It has an integral strainer to prevent clogging and saves time and money by eliminating the need for manual draining. The Terminator automatic drain valve also eliminates the need for the wasteful practice of bleeding, or leaving cracked open manual drain valves. Click here to calculate the cost of bleeding a compressed air drain.

Features and Benefits
  • Adjustable cycles
    Open setting 1 – 60 seconds
    Closed setting 1 – 60 minutes
  • Compact and light weight, less than 2 pounds
  • Outlet hose barb connection for drain lines
  • Integral strainer
  • Inlet isolation valve for easy servicing
  • Solid state timer
  • Indoor or outdoor installation
  • NEMA 4 Lexan enclosure
  • Power on and valve open status LEDs
  • Override test function to test valve open time setting
  • 300 PSIG pressure rating
  • 115V, 220V, or 12V DC


  • Filters
  • Drop legs
  • Receivers
  • Separators
  • After-coolers
  • Refrigerated dryers


Motorized Ball Drain Valves

Sentinel Motorized Ball Valves

Motorized Drain Valves
Whether you need the simplicity of a basic valve or the flexibility of added features, the Sentinel Series is your solution. Choose from two models, plus different options and accessories to fit the level of adjustment and controls you need.

For the most dependable draining, install the Van Air Sentinel Series motorized ball valve. The Sentinel's heavy-duty ball valve can manage virtually any fluid in a wide variety of applications. Depend on it for nearly any fluid service.

For dependable draining at consistent intervals choose Sentinel model MDV-400I. A power-on LED and test button are conveniently located on the top cover. To reset the valve, simply adjust the switches on the internal circuit board. Adjustable intervals between valve actuations are 30 minutes to 30 hours. Adjustable draining periods are 5, 10, 15 and 20 seconds.

If you prefer an easy-to-use keypad for convenient cycle timing adjustments and a handy LCD cycle status readout, choose Sentinel model MDV-400L. You'll never wonder when it's set to actuate again with its continuous, clear countdown display of remaining cycle or drain open times. Added features include an external test and valve fault functions, both with LCD readout. Adjustable intervals between valve actuations are 1 minute to 99 hours 59 minutes. Adjustable draining periods are 1 second to 99 minutes 59 seconds.

Features and Benefits

  • 115 VAC, 230 VAC, 12 VDC, 24 VDC
  • 10' power cord
  • Two-piece brass ball valve
  • ½", ¾", or 1" NPT connection
  • Thermoplastic top cover
  • Epoxy powder-coated metal base
  • NEMA 4 enclosure
  • 0°F - 120°F ambient temperature range
  • Optional stainless steel valve (standard brass)
  • Optional alarm contact for remote indication of fault mode
  • Optional high/low liquid level sensor, flood level switch for zero air loss operation
  • Brass valves with NPT connection sizes: ½", ¾", 1", 1 ½", 2", 2 ½", 3"
  • Stainless steel valves with NPT connection sizes: ½", ¾", 1", 1 ½", 2"


  • Cooling towers
  • Process tanks
  • Separators
  • Compressed air filters
  • Compressed air receiver tanks
  • Compressed air dryers

Zero-Loss Pneumatic Drain Valves

Zero-Loss Pneumatic PDV-500T Drain
Zero-Loss Pneumatic Drain Valves
The Van Air PDV-500T is a versatile draining system ideal for receivers, dryers, tanks, drop legs, pipes, and any equipment requiring regular condensate removal. With no electricity required for operation, the pneumatically operated PDV-500T automatic drain valve is well suited for remote or portable applications and is safe to operate in any hazardous area.

As a demand-operated drain, the PDV-500T automatically does the work of draining for you, eliminating the guess work of setting the cycle time of the timed drain valve. As condensate levels change, the PDV-500T automatic drain valve automatically adjusts to drain as needed, without permitting valuable compressed air to escape.

Designed with a full flow ball valve and proprietary pilot valve using a magnet and proximity switch, the PDV-500T will not clog. This unique pilot valve design allows the control air to be totally separated from the condensate, preventing any attraction of pipe scale. The ball valve eliminates the need to install a strainer. This means better dependability than competitive units.

The see-through vessel allows visual inspection of the condensate. The test button, which is included on both the brass and stainless steel units, make it easy to check valve operation or manually drain the system.

Features and Benefits

  • No electricity needed
  • Zero air loss saves energy
  • Full flow ball valve for reliable operation
  • Visible liquid level verifies performance
  • Safe operation in hazardous areas
  • Manual override is standard


  • Receiver tanks
  • Compressed air dryers
  • Coalescing filters
  • Drop legs
  • Condensate collection points
  • Remote or portable equipment where no power is available

 Automatic Drain Valve, Motorized Drain Valve