Sullair 250017-280 Regulator Valve Assembly: Complete Guide for Industrial Air Compressor Maintenance
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What is the Sullair 250017-280 vacuum regulator?
The Sullair 250017-280 is the vacuum regulator kit from Sullair's service-parts line — the box label reads it plainly: KIT, VAC REG RSVS. The assembly is an aluminium regulator body with a hex ported section (NPT female port under a red protection plug), a spring-adjustment cap on top, and an A2-70 stainless adjustment bolt with its lock nut; the body carries 250017-280 laser-etched on its face. This record books three purchases of the part — two units on 14 January 2026 and one on 25 May 2026, factory-new in the SULLAIR SERVICE PARTS boxes, one-year warranty on the latest intake. All nine photos and the inspection video show these exact regulators.
Part details
| Field | Value |
|---|---|
| Brand | Sullair — SULLAIR SERVICE PARTS packaging |
| Part number | 250017-280 (box label and laser-etched on the body) |
| Box description | KIT, VAC REG RSVS — vacuum regulator kit |
| Construction | Aluminium body, hex ported section with NPT female port (red protection plug), spring cap, A2-70 stainless adjustment bolt and lock nut |
| Function | Vacuum regulation for Sullair compressor/vacuum service — spring-set cracking pressure |
| Box dates | 25/05/16 and 25/12/16 on the two label styles photographed |
| Quantity | 3 units across two intakes (2 × Jan 2026, 1 × May 2026), factory-new, 1-year warranty as recorded |
Values are read from the box label, the body engraving and the photographed construction in the photo set.
Where it sits on the machine
A vacuum regulator is the part that decides at what vacuum a compressor or vacuum system unloads and reloads — the spring behind the top cap sets the setpoint, the ported body senses the line, and the internal valve modulates the control signal accordingly. On Sullair machines the part is stocked as a service kit rather than a bare valve: the box carries the part number and the kit description, and the unit arrives ready to thread in — NPT port under the red plug, adjustment bolt up, lock nut snug. When a Sullair installation starts hunting, unloading late, or refusing to reach its previous vacuum ceiling, this is the part that goes back to spec — and the laser-etched 250017-280 on the body is the check against the parts book before ordering.
The three units in this record span two box-date styles (25/05/16 and 25/12/16) of the same part — same casting, same engraving, same red plug — the current Sullair supply photographed from every side so the port, the adjustment stack and the engraving are all verifiable before purchase.
Photos
All images below are original KOEED warehouse photos. Click any photo to view it full size.
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