Orion Motor Tech 3.5 CFM A2L Single-Stage Vacuum Pump — 15 Micron Deep Vacuum, Sparkless Design

The Orion Motor Tech OMT 3.5 CFM A2L single-stage vacuum pump is a sparkless, compact evacuation tool engineered to pull refrigeration and automotive systems down to 15 microns while safely handling mildly flammable refrigerants.

This compact pump pairs a spark-resistant design with strong pumping performance so technicians, HVAC pros, and automotive service centers can evacuate systems quickly and with reduced oil mist. Built for versatility, it supports common refrigerants including R1234yf, R32, R134a, R22, and R410A and fits both 1/4" SAE and 1/2" ACME connections. The unit emphasizes cleaner operation, quieter running, and fewer oil top-ups through a well-thought-out tank and baffle layout.

How fast and deep does this pump evacuate systems?

The OMT 3.5 CFM pump delivers a robust 3.5 cubic feet per minute flow driven by a 1720 rpm motor, enabling rapid pull-downs. In practice it can reach a working vacuum as low as 15 microns (approx. 2 Pa), shortening evacuation time on typical HVAC and automotive jobs.

• 3.5 CFM pumping speed for efficient evacuation
• 1720 rpm motor for steady suction performance
• Capable of reaching 15 microns (2 Pa) for thorough system evacuation

What safety features make it suitable for A2L and mildly flammable refrigerants?

This model includes a sparkless construction and an ignition-proof ON/OFF switch to minimize ignition risk when working with A2L refrigerants. An oil-mist-reducing port and secure sealing further reduce potential hazards and contamination during service.

• Spark-resistant components and ignition-proof switch for safer operation
• Oil mist-free cap on combined fill/exhaust port to limit emissions
• Designed to meet the needs of mildly flammable refrigerant handling

How user-friendly is the design for day-to-day shop use?

The pump’s 13.5 fl. oz. oil tank lets you run longer between refills while a double-layer baffle reduces oil spray and keeps motor areas cleaner. Other practical touches include an angled oil drain for easier maintenance, a reinforced bottom for stability, and an ergonomic handle that improves portability on the job.

• 13.5 fl. oz. oil capacity reduces refill frequency
• Double-layer baffle lowers oil carryover and spray
• Angled drain and reinforced base for simple, stable maintenance

Which fittings, environments, and noise levels can I expect?

Designed to fit common service fittings, the pump accepts both 1/4" SAE and 1/2" ACME connections for broad compatibility across HVAC and automotive equipment. It runs at or under approximately 70 dB, making it quieter than many bench pumps and more comfortable for shop environments.

• Compatible with 1/4" SAE and 1/2" ACME fittings
• Suitable for HVAC, automotive, lab, and packaging use
• Operates at or below about 70 dB for reduced workplace noise

Who is this for? Technicians who need a portable, efficient evacuation tool with safety features for mildly flammable refrigerants will appreciate this Orion Motor Tech pump. It is well suited to automotive technicians servicing R1234yf systems, HVAC installers working with R410A or R32, and labs or workshops that require dependable pull-down performance with reduced oil mist and noise. Keep in mind the nameplate note: the 'Ultimate Vacuum' rating lists 150 microns as ultimate total pressure and 2 Pa as ultimate partial pressure.