Orion Motor Tech 4.5 CFM Single-Stage Vacuum Pump — 37.5 Micron Deep Vacuum, Aluminum Housing Kit

The Orion Motor Tech OMT 4.5 CFM single-stage vacuum pump is a portable HVAC service unit designed to evacuate automotive and light commercial AC systems down to deep vacuum for faster, cleaner refrigerant servicing.

This compact, service-ready vacuum pump pairs a robust all-copper motor with a corrosion-resistant aluminum housing to deliver reliable evacuation performance for systems using R12, R22, R134a, R410a, and R502 refrigerants. Built with practical features like a sight glass oil reservoir, nonslip handle, and universal hose compatibility, the unit is supplied as a kit that includes pump oil, gloves and sealing tape so you can start jobs immediately.

How quickly can this pump evacuate an automotive AC system?

The OMT 4.5 CFM pump provides a 4.5 cubic feet per minute flow rate and is capable of pulling down to about 37.5 microns (≈5 Pa), so it reduces moisture and air from system lines efficiently. Faster evacuation helps reduce service time and improves the chance of a dry, contamination-free system before recharging refrigerant.

• Nominal flow: 4.5 CFM for steady evacuation speed
• Vacuum depth: rated to approximately 37.5 microns (5 Pa)
• Suitable for common refrigerants: R12, R22, R134a, R410a, R502
• Quick setup with included hoses and accessories

What safety and durability features does it include?

The pump uses an aluminum alloy casing that helps disperse heat and resists corrosion under regular shop conditions. An intake filter and internal trap reduce contamination and oil carryover, helping to preserve pump internals and prolong service life.

• Reinforced aluminum housing for heat dissipation and durability
• Intake filter and trap to block particulates and oil mist
• All-copper motor winding for reliable electrical performance
• Nonslip handle for safe transport between jobs

How user-friendly is the pump for routine HVAC service?

Designed for ease of use, the unit’s oil reservoir features a sight glass and level markings so you can verify lubrication at a glance. The kit arrives with pump oil, gloves and Teflon tape, removing the need to hunt for basic consumables before the first job.

• Sight glass and scale for quick oil checks and refill timing
• Ergonomic handle and compact footprint for portability
• Compatible with 1/4", 3/8", and 1/2" hoses to match common fittings
• Includes oil, gloves and sealing tape to start service immediately

What other applications can this vacuum pump handle?

Beyond automotive and residential HVAC work, this single-stage pump is flexible enough for hobby and light industrial applications such as vacuum packaging, wine degassing, and some thermoforming tasks. It’s best suited for jobs that need reliable evacuation but don’t require two-stage ultra-deep vacuum equipment.

• Automotive and light commercial AC system evacuation
• Vacuum packaging and food processing prep
• Wine degassing and laboratory prep tasks
• Small thermoforming and mold preparation

Who is this for? The Orion Motor Tech OMT 4.5 CFM single-stage pump is ideal for DIY mechanics, mobile HVAC technicians, small repair shops, and hobbyists who need a portable, reliable evacuation tool that arrives ready to use. If you require consistent 4.5 CFM performance with user-friendly controls and included consumables for immediate fieldwork, this model balances capability and value without the complexity of two-stage systems.