Six wear items, one cross-reference catalog. What's the OEM make / model / HP, what's failing or what's coming due, and what's the operating-hours interval since last service? This page walks the symptom-to-part flow from "the customer just sent a PO with an OEM part number on it" to the right aftermarket equivalent on the quote — comparison first, decision tree second, questions to ask third.
Synthetic Compressor Oil 
Food Grade Compressor Oil 
Compressor Oil Filter Aftermarket 
Compressor Intake Filter Aftermarket 
Compressor Intake Filter 
Compressor Service Valve Replacement Tap any type to jump to its page. The Decision Guide further down asks three questions that funnel the spec to one of these.
Oils, filters, separators, and service valves — the wear items every compressor consumes on a predictable schedule for as long as it runs.
The cross-reference catalog matches the OEM make / model / HP to a functionally identical part at 40-60% of OEM list with same-day ship.
Oil, oil filter, separator, and intake element change in the same window — bundle the annual service kit, not the lone line.
Sell the cross once and the maintenance department defaults to it on every change after. Miss a service and they call a competitor.
HACCP, SQF, BRC, FSSC 22000 — once the audit names H1, it's a compliance line, not a value engineer. Route to quality, don't guess.
Valves on Conrader, filters on KELTEC + Mann-Filter, lubricants on AMSOIL, intake housings on Solberg — one consolidated cross per family.
Distributor-facing reading. The trade-off column is the one that closes the loop — every type buys something and gives something up. Knowing what each type costs you is how the right one gets on the quote without a callback.
Reading the brand bench column — the bar shows how many of SPC's tier slots (Industry Leader · Emerging · Economical · adjacent) carry an option at that product type. A deep bench means a price-driven and a spec-driven option both close cleanly; a narrow bench means the available brands map closely to the technical requirements and the comparison stops being a tier choice. Service Parts benches run narrow by design — each product type is a single cross-reference catalog, and consolidating to one or two aftermarket vendors per family IS the value.
Draw a line from the customer's answer at the top to the type name at the bottom. This is the page distributors screenshot and send to a customer the day before a quote call — so the customer comes prepared with the answers, and the call is about the brand and the budget, not the basics.
Two things to keep in mind on every service-parts quote. First — the cross-reference catalog IS the spec sheet for aftermarket items. Oil filters, intake elements, separators, and service valves don't have customer-facing engineering datasheets; the OEM make / model / HP (sometimes serial) resolves to one aftermarket part number through KELTEC, Mann-Filter, or Conrader's catalog. Photo the nameplate + photo the failed part = both inputs the catalog needs. Second — the customer rarely calls for a single item. An oil quote is also an oil-filter quote, an intake-filter quote, and a separator quote — all four wear items change in the same service window. Bundle as the annual service kit at 5-10% discount; the bundle is the recurring-revenue mechanic, not the individual line.
Service Parts isn't transactional — it's the layer customers come back for. Sell the cross-reference once, sell the annual kit every year after.
If the customer answers most of these at the first call, the second call is the quote. If they can't answer any, the service parts are rarely the only spec gap — flag it and push for a site walk.
Service / MRO is the recurring layer — the items that show up on the PO every quarter, not once at the spec. Every layer above it gets specified once and installed once; this one gets re-quoted on a 2,000-hour, 6-month, or annual cycle for as long as the compressor runs. That makes Service Parts the line customers come back for — and the line they're easiest to lose to a bargain catalog if no one is calling them ahead of the next change. For SPC it is also the aftermarket-cross opportunity: every OEM-branded oil, filter, and valve in the field has a Conrader, KELTEC, Mann-Filter, AMSOIL, or Solberg equivalent that cross-references against OEM make / model / HP at 40-60% of OEM list pricing with same-day shipping. Sell the cross-reference once and the customer's maintenance department defaults to it on every change after. Get this layer wrong — miss a separator service, ship the wrong oil grade, fail to cross a valve — and the customer is on the phone to a competitor with a downed compressor. Get it right and it becomes the most defensible recurring-revenue line in the catalog.
The recurring layer — oils, filters, valves, and the OEM cross-reference catalog that wins the PO every quarter. This is the layer customers come back for; every other layer is specified once, this one is re-quoted on the maintenance calendar for as long as the compressor runs.
Tell us the end-use, the rough flow, and what climate the unit would sit in. We'll come back with a configured quote — the right type, the right tier, and the upstream gear the warranty assumes.
—. We reply within one business day with pricing, lead-time, and configured parts.