02250170-783 Sullair OEM Electric Drain Valve, 24VDC

The 02250170-783 Sullair OEM electric drain valve is a 24VDC automatic condensate drain assembly used on Sullair rotary screw air compressors. Sullair’s own part designation is VLV,DR COMBO 24 VDC, referring to the integrated solenoid drain valve and electronic interval timer packaged in a single unit. The timer opens the valve at programmed intervals to discharge accumulated water and oil from the compressor’s moisture trap or receiver tank.

Key features and benefits

• OEM-issued Sullair part, Sullair designation VLV,DR COMBO 24 VDC
• Integrated solenoid valve and electronic interval timer in one assembly
• 24VDC control voltage for direct connection to compressor control circuits
• Adjustable cycle interval and discharge duration
• Automatic operation that removes condensate without manual drain points
• Direct-fit replacement for OEM-installed combo drain assemblies on supported Sullair models

How the combo drain valve works

The 02250170-783 manages condensate removal as a closed-loop function on the compressor. The electronic timer energizes the solenoid coil at the configured interval, opening the drain orifice for the configured discharge duration. Water and oil collected in the upstream trap or receiver vent to drain, after which the solenoid de-energizes and the orifice closes. The cycle repeats while the compressor is powered, keeping condensate from accumulating to levels that would cause carryover into the compressed-air system, corrosion in downstream components, or premature filter loading.

Applications and compatibility

The 02250170-783 is the OEM combo drain valve for Sullair rotary screw air compressors that use a 24VDC drain control circuit. Documented Sullair model fitments include the 16/18 Series 4500P and 16/18 Series 5500. The same combo assembly is used on other Sullair compressors with 24VDC drain control, subject to model year and revision.

Sullair has used several drain valve assemblies across model years, control voltages, and revision levels. Confirm 02250170-783 against your machine’s parts manual, the unit’s serial-number plate, or by calling Stark Industrial Products at (903) 768-1111 with the unit’s serial number for fitment verification before ordering.

Important voltage note: This valve operates on 24VDC. Sullair compressors with 115VAC or 230VAC drain control require a different combo drain valve assembly. Confirm the control voltage on your compressor’s drain control circuit before ordering.

Technical specifications

• Manufacturer part number: 02250170-783
• Sullair part description: VLV,DR COMBO 24 VDC
• Function: Combo electric drain valve, automatic condensate discharge
• Control voltage: 24 VDC
• Construction: Solenoid valve assembly with integrated electronic timer module
• Cycle control: Adjustable interval and discharge duration
• Operating media: Compressed-air-line condensate (water, oil, fine particulate)
• OEM application: Sullair rotary screw air compressor automatic drain circuit

Installation overview

Power down and depressurize the compressor before any work on the drain circuit. Remove the existing combo drain valve and inspect the upstream strainer for debris. Mount the 02250170-783 to the existing drain port using the OEM thread arrangement and seal the connection to the manufacturer’s specification. Connect the 24VDC control leads in the correct polarity. After power-up, set the cycle interval and discharge duration per the compressor service manual, then verify a clean discharge during the first programmed cycle.

Why Sullair OEM matters

The 02250170-783 is the part number issued by Sullair for the 24VDC combo drain valve on supported rotary screw models. An OEM-issued combo valve is matched to the compressor’s electrical control circuit, drain port arrangement, and discharge timing logic. Using the OEM part keeps the drain circuit within factory parameters and avoids voltage, port-fit, or cycle-timing mismatches.

Why buy from Stark Industrial Products

Stark Industrial Products is an OEM parts supplier for air compressors, drilling rigs, pumps, and tractors. Orders for in-stock 02250170-783 combo drain valves ship the same day. The phone line at (903) 768-1111 is staffed 24/7 for parts identification and order placement.

Frequently asked questions

What Sullair models does the 02250170-783 combo drain valve fit?

The 02250170-783 is the OEM combo electric drain valve used on Sullair rotary screw air compressors with 24VDC drain control. Documented model fitments include the 16/18 Series 4500P and 16/18 Series 5500. Because Sullair has used several drain valve assemblies across model years and control voltages, confirm fit against your machine’s parts manual or by calling Stark Industrial Products at (903) 768-1111 with the unit’s serial number.

What is the control voltage of the 02250170-783?

24 VDC. Sullair compressors with 115VAC or 230VAC drain control require a different combo drain valve assembly. Verify the control voltage on your compressor’s drain control circuit before ordering.

Is the cycle timing adjustable?

Yes. The integrated electronic timer module supports adjustable cycle interval and discharge duration. Set both values per the compressor service manual to match the unit’s condensate generation rate.

Does the 02250170-783 require a separate filter or strainer?

The combo valve relies on the upstream strainer or trap to prevent solid debris from reaching the solenoid orifice. Inspect and clean the upstream strainer at scheduled compressor maintenance intervals to maintain reliable discharge.

Does Stark Industrial Products ship same-day?

Yes. In-stock units ship the same day. Stark Industrial Products operates 24/7 and can be reached at (903) 768-1111.