VH1158US-NEW – VACUUM PUMP (SPECSTAR, 5 CFM, 2-STAGE)

SpecStar 5 CFM two-stage rotary vane vacuum pump for evacuating A/C and refrigeration systems. No manufacturer specification sheet was found for this part number.

Specifications from our own stock records. The manufacturer does not publish a public page for this item.

Specs

• Part typeVacuum pump
• Brand (stock record)SpecStar
• Free air displacement5 CFM
• Stages2-stage
• Verify before orderingUltimate vacuum in microns, motor HP, voltage, oil capacity
• Data SourceOTP stock record - not manufacturer-verified

Does a bigger pump evacuate faster?

Usually not, because the restriction beats the displacement. A 1/4 inch hose with the Schrader core still in the port chokes even a large pump down to roughly half a CFM by the time you reach 1,000 microns. Put a vacuum-rated core removal tool on each service port, pull the cores, and run 3/8 or 1/2 inch hoses. A 4 CFM pump plumbed that way beats a 6 CFM pump plumbed the lazy way every time. Buy the core tools before you buy the bigger pump.

How often does pump oil need changing?

More often than most people do it, and always while the pump is warm so the contamination drains out with it. Change it when the oil turns creamy (moisture) or dark (acid and debris), when the pump will not reach its blank-off rating, and before any evacuation you actually care about. In the field that runs anywhere from daily to monthly. There is no filter inside a vacuum pump - the oil is the filter, and saturated oil raises the best vacuum the pump can reach.

Can I recover R-454B into my old machine?

No. A2L work calls for a non-sparking recovery machine and a non-sparking vacuum pump, and the cylinder has to be one labeled for that refrigerant, with left-hand threads and a relief valve rather than a rupture disc. Keep the pump exhaust and the machine clear of ignition sources and keep the space ventilated.

How full can a recovery cylinder go?

80 percent by weight, on a scale, never by feel or by sound. And never mix refrigerants in one cylinder - a mixed jug is a disposal problem, not recovered refrigerant.