Orion Motor Tech OMT 4 CFM Single-Stage Vacuum Pump, FBA-VPHB001OG

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Product guide

Orion Motor Tech OMT 4 CFM Single-Stage Vacuum Pump, FBA-VPHB001OG

FBA-VPHB001OG: Orion Motor Tech OMT is a 4 CFM single-stage rotary-vane vacuum pump for automotive AC and HVAC servicing. Its listing specifies a 1/3 hp motor, a 30-minute duty cycle and a stated ultimate vacuum of 37.5 microns, with oil and selected accessories described as included.

At a glance

The listing describes a 4 CFM single-stage rotary-vane pump with a 1/3 hp all-copper motor.
A sight glass and scale are provided for monitoring the oil level.
The stated hose compatibility covers 1/4", 1/2", and 3/8" hoses, while the technical detail lists 1/4 in. and 1/2 in. inlet ports.
The pump is described for automotive HVAC, vacuum packaging, wine degassing and thermoforming applications.

Price

$66.59Save 10%

Reference price: ~~$73.99~~

Price checked: Nov 13, 2026

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Pros and cons

Pros

Oil is included, and a sight glass with scale makes checking its level more straightforward.
The listed hose compatibility covers three hose sizes for varied setup needs.
The compact listed dimensions and nonslip handle may help with moving or storing the pump between jobs.

Cons

The stated duty cycle is 30 minutes, which limits uninterrupted operation compared with a continuous-duty specification.

Technical specifications

19 specifications

Identity
Brand	Orion Motor Tech
Model	FBA-VPHB001OG
Pump type	Rotary Vane
Stages	Single stage

Performance and operation
Motor power	1/3 hp (248W)
Flow rate	4 cfm (6.8 m³/h)
Ultimate vacuum	37.5 Microns (5 Pa)
Duty cycle	30 min.
Refrigerants named	R12, R22, R134a, R410a, and R502

Connections and oil
Inlet ports	1/4 in. & 1/2 in.
Hose compatibility	1/4", 1/2", and 3/8" hoses
Oil capacity	0.24 qt. (225 mL)
Oil provided	0.26 qt. (250 mL)

Dimensions and installation
Dimensions listed	10.8 x 4.3 x 8.5 inches
Weight listed	10.78 pounds
Cord length	4.6 ft

Construction and features
Special features	High Flow Rate, All-Copper Motor, Reinforced Casing, Multi-Hose Compatibility
Casing description	reinforced aluminum alloy casing
Oil monitoring	sight glass and scale

What to know before buying

Listing details to confirm

The listing is inconsistent about connections: it describes compatibility with 1/4", 1/2", and 3/8" hoses, but lists only 1/4 in. and 1/2 in. inlet ports. The stated 37.5-micron ultimate vacuum is a manufacturer claim, while customer feedback includes reports of not reaching 500 microns. Confirm the required connections and performance for the intended job.

Who is it for?

A good fit for

Automotive AC and HVAC users seeking a single-stage pump with a listed 4 CFM flow rate and specified 30-minute duty cycle.
Buyers who want included oil and oil-level visibility for routine servicing.
Users considering additional applications such as vacuum packaging, wine degassing or thermoforming, as named in the listing.

Less suited to

Users needing a stated continuous-duty operating cycle.
Buyers who need confirmed performance at a particular vacuum level or a specific hose connection without resolving the listing discrepancies.

Orion Motor Tech OMT 4 CFM Single-Stage Vacuum Pump, FBA-VPHB001OG · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 318 ratings

5 stars79%79%
4 stars13%13%
3 stars4%4%
2 stars1%1%
1 star3%3%

Customer feedback highlights perceived quality, value and quiet operation, while vacuum performance and build quality are mixed. Some customers reportedly say the pump pulls vacuum effectively, while others report less than 500 microns, and oil leakage is also mentioned. These experiences matter if a job depends on achieving the listed 37.5-micron claim or keeping the work area free of oil, but do not establish the performance of an individual unit.

Positive themes

Customers reportedly praise quality, value for money and quiet operation.

Negative themes

Some customers report oil leaking from the bottom.

Mixed feedback

Vacuum performance is mixed, including reports of effective evacuation and reports of less than 500 microns.
Build quality receives both positive and negative feedback.

Frequently asked questions

What flow rate and motor power are listed?

The listing specifies 4 cfm (6.8 m³/h) and 1/3 hp (248W). These are manufacturer-listed specifications, not independent measurements.

What ultimate vacuum does the listing claim?

It states 37.5 Microns (5 Pa). Customer feedback reports mixed vacuum performance, so buyers with a required target should confirm suitability before purchase.

Which hose connections are supported?

The listing describes compatibility with 1/4", 1/2", and 3/8" hoses, but lists inlet ports as 1/4 in. & 1/2 in. The 3/8-inch connection detail is therefore unclear.

What comes with the pump?

The listing claims oil, gloves and Teflon tape. A separate technical description lists oil, an adapter, Teflon tape and a pair of work gloves. Check the selected listing for the package contents.