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Black Knight
Vacuum Pump · Dual-Stage

HCBK-6D6 CFM Dual-Stage Vacuum Pump · 75 Micron · Dual Voltage

SKU · 22-0010MPN · HCBK-6D
6 CFM Dual-StageHCPRO DesignedBlack Knight6 CFMDual Stage75 Micron115/230VGas BallastNo-Mess Drain
$113.04
Out of stock· backorder available
Direct from the manufacturer — Miami HQ, full warranty & tech support included.
Out of stock
Designed
Miami, FL
Warranty
1-Year Full
Ships
1–2 Days
  • Field-tested by working HVAC technicians
  • Free returns within 30 days
  • Direct manufacturer support — Miami HQ
  • ORDER IN THE NEXT — AND IT SHIPS TODAY FROM MIAMI
6CFM
Dual-Stage Free Air Displacement

6 CFM dual-stage rotary vane — the two-stage design pulls a deeper ultimate vacuum than single-stage pumps, evacuating residential and light-commercial systems fast

75MICRONS
Deep Ultimate Vacuum

Pulls down to 75 microns ultimate vacuum — well below the 500-micron threshold for a clean, moisture-free system that protects the compressor

115/230VOLT
Dual Voltage 50/60Hz

Dual-voltage 115V / 230V, 50/60Hz — works on any service power worldwide. Gas-ballast valve clears moisture from the oil during deep pulls.

HCPRODESIGNED
Designed in USA

HCPRO-designed to Black Knight specifications and quality-control standards — engineered in Miami, built to spec by our manufacturing partner

Why Black Knight

Dual stage.

Dual voltage.

Deep vacuum.

The HCPRO Black Knight HCBK-6D is the dual-stage workhorse vacuum pump for HVAC and refrigeration service — 6 CFM free air displacement, 75-micron ultimate vacuum, dual-voltage 115/230V operation, and a gas-ballast valve for wet-system evacuation. Built for techs who evacuate every system to a clean, moisture-free deep vacuum before charging.

Dual-stage deep vacuum

The two-stage rotary vane design pulls a deeper ultimate vacuum (75 microns) than single-stage pumps — the first stage handles bulk evacuation, the second stage finishes the deep pull. That's the difference between a system that holds vacuum and one that comes back with moisture in it. 6 CFM free air displacement evacuates residential and light-commercial systems without waiting around.

Dual voltage, gas ballast valve

Dual-voltage 115V / 230V at 50/60Hz — runs on any service power, residential or commercial, US or international. The gas-ballast valve lets you purge moisture out of the pump oil mid-evacuation without stopping, keeping the oil clean and the pump pulling deep on wet systems.

No-mess oil drain, built to last

The no-mess oil drain empties spent oil cleanly without spilling down the housing — and you drain it hot, with no waiting for the pump to cool down, saving real time on every oil change. Oil-sealed rotary vane construction with a large sight glass to monitor oil level and condition at a glance. Aluminum housing keeps weight down for truck-to-rooftop hauling.

Full Product Description

The HCPRO Black Knight HCBK-6D is a 6 CFM dual-stage vacuum pump that reaches deeper microns than a single-stage pump — dual-voltage 115–230V, 50/60Hz.

Key features

  • Dual-stage design pulls a deeper ultimate vacuum for faster, drier evacuations
  • 6 CFM free-air displacement for residential and commercial R-410A and A2L work
  • Dual-voltage 115–230V, 50/60Hz — one pump for any job site
  • No-mess quick-drain port dumps hot oil with no cool-down wait
  • Intake fittings in 1/4", 5/16" and 3/8" SAE; HCPRO-designed to Black Knight spec

Step up to dual-stage depth when a clean, dry vacuum decides whether the compressor lasts.

Technical specifications

Dual-stage vacuum pump specs for daily evacuation work.

HCBK-6D Black Knight dual-stage vacuum pump — 6 CFM free air displacement, 75-micron ultimate vacuum, dual-voltage 115/230V 50/60Hz, gas-ballast valve. Oil-sealed rotary vane with no-mess oil drain and large sight glass. HCPRO-designed to Black Knight specifications.

Model
HCBK-6DBlack Knight dual-stage dual-voltage vacuum pump
Free air displacement
6 CFMEvacuates residential and light-commercial systems quickly
Stages
Dual stage (2-stage rotary vane)Deeper ultimate vacuum than single-stage — first stage bulk, second stage deep pull
Ultimate vacuum
75 micronsWell below the 500-micron clean-system threshold
Voltage
Dual voltage 115V / 230V, 50/60HzRuns on any service power, US or international
Motor speed
3440 RPMInduction motor, oil-sealed rotary vane
Oil capacity
13.9 oz / 410 mLUse ISO VG46 synthetic vacuum pump oil (sold separately)
Gas ballast valve
YesPurges moisture from oil mid-evacuation on wet systems
Oil drain
No-mess quick drain (no cool-down wait)Drain hot oil immediately — no waiting for the pump to cool. Saves real time on every oil change, no spills down the housing.
Sight glass
Yes — large oil-level windowMonitor oil level and condition at a glance
Intake fitting
1/4″, 5/16″, 3/8″ SAEThree intake connections — standard 1/4″, R-410A/A2L 5/16″, and high-flow 3/8″ evacuation hoses
Country of origin
ChinaHCPRO-designed in Miami to Black Knight specifications, built to spec and quality-controlled to OEM standards
Housing
Aluminum, carry handleLightweight for truck-to-rooftop hauling
Warranty
1-year limitedCovers manufacturing defects under normal professional use
In the box

Pump, fittings, starter oil — ready to pull vacuum.

HCPro HCBK-6D vacuum pump with branding and product description on a dark background
HCBK-6D 6 CFM dual-stage vacuum pumpDual-voltage 115/230V, gas-ballast valve, no-mess oil drain, large sight glass, aluminum housing with carry handle
Intake fittings + dust caps1/4″, 5/16″, and 3/8″ SAE intake — connects standard, R-410A/A2L, and high-flow evacuation hoses
Starter oil chargeInitial vacuum pump oil to get you running — refill with ISO VG46 synthetic vacuum pump oil (sold separately)
Black Knight pump service insertOil-change procedure, gas-ballast usage, deep-vacuum technique, micron-gauge reference
Customer reviews

What working techs say after putting it on the truck.

12,000+ HVAC pros served
4.9★ Average rating
94% Repeat buyers

Replace this with a real customer quote — what systems evacuated, how fast it pulled to 500 microns, how the dual voltage and gas ballast performed in the field.

Marcus T.HVAC TECH · MIAMI, FL
On HCPRO Black Knight HCBK-6D Vacuum Pump

Replace this with a real customer quote — what systems evacuated, how fast it pulled to 500 microns, how the dual voltage and gas ballast performed in the field.

Jorge R.REFRIGERATION CONTRACTOR · ATLANTA, GA
On HCPRO Black Knight HCBK-6D Vacuum Pump

Replace this with a real customer quote — what systems evacuated, how fast it pulled to 500 microns, how the dual voltage and gas ballast performed in the field.

Derrick W.COMMERCIAL HVAC · PHOENIX, AZ
On HCPRO Black Knight HCBK-6D Vacuum Pump
Used it on a job?

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Tools that pair with the HCBK-6D.

Synthetic Vacuum Pump Oil — ISO VG46 (Quart & Gallon)
02-0028

Synthetic Vacuum Pump Oil — ISO VG46 (Quart & Gallon)

$19.15
Dual Force R410a Evacuation Kit – 3/8" Hose + 5/16" VCRT Tool
22-0001

Dual Force R410a Evacuation Kit – 3/8" Hose + 5/16" VCRT Tool

$99.95
HCQFH38 DUAL FORCE 3/8" 6' SAE High Volume Dual Force® Evacuation and Charging Hose R410 Rated image 2
22-0063

Dual Force 3/8" x 6' SAE HVAC Evacuation & Charging Hose R410A Rated

$68.52
HCEVCK538 Vacuum Rated Valve Core Removal Tool – 5/16” x 3/8” x 1/4”
22-0062

HCEVCK538 Vacuum Rated Valve Core Removal Tool – 5/16” x 3/8” x 1/4”

$49.48
HC-2V2F5AB Brass 2-Way Manifold Gauge Set R410a, R22, R404a, R134a °F PSI, 3-1/8" Gauges, (5) 60” Anti-Blowback ¼” Premium Black Hoses Rated 4000 PSI Burst, 800 PSI image 1
22-0107

HVAC Manifold Gauge Set R410a/R22/R404a/R134a – 3‑1/8″ Gauges & 5 ft Anti‑Blowback Hoses

$119.85
Common questions

Answers from the warehouse floor.

Still stuck? Call our techs at 305-720-0044.

Does HCPRO warranty the products?

Yes — every HCPRO Black Knight product ships with a 1-year limited warranty against manufacturing defects under normal professional use. See our full warranty terms.

Which Black Knight vacuum pump should I pick?

HCEC-6S (6 CFM single-stage, 115V) is the economy choice for residential service. HCBK-6D (this pump — 6 CFM dual-stage, dual-voltage) is the workhorse for techs who want deeper vacuum and global voltage. HCBK-12DC (12 CFM sparkless BLDC, 15 micron) is the flagship for commercial volume and A2L / flammable refrigerant work.

Why does dual-stage matter?

A single-stage pump evacuates to roughly 75-150 microns realistically in the field. A dual-stage pump like the HCBK-6D uses two rotary vane stages in series — the first does bulk evacuation, the second finishes the deep pull — reaching a lower, more reliable ultimate vacuum. For systems where moisture removal matters (which is all of them), dual-stage pulls deeper and holds it better.

What's the gas-ballast valve for?

When you evacuate a wet system (moisture in the lines), water vapor condenses inside the pump and contaminates the oil — which kills your ultimate vacuum. The gas-ballast valve bleeds a controlled amount of air into the second stage during evacuation, carrying that moisture out with the exhaust before it condenses. Open it on wet pulls, close it for the final deep vacuum.

What oil does it use and how often do I change it?

Use ISO VG46 synthetic vacuum pump oil (we sell it in quart and gallon). The HCBK-6D holds 13.9 oz / 410 mL. Change the oil when it turns cloudy or milky (moisture contamination), after every heavily-contaminated system, or at minimum every 10-20 evacuations. Clean oil is the single biggest factor in how deep your pump pulls — the no-mess drain makes field changes quick.

Do I need a special hose for fast evacuation?

For fastest pull-down, use a 3/8″ high-flow evacuation hose (the Black Knight Dual Force 3/8″ hose) rather than a standard 1/4″ charging hose. The larger bore moves significantly more air per minute. The HCBK-6D has both 1/4″ and 3/8″ SAE intake fittings so you can run either. Pair with the Dual Force evacuation kit for the matched-spec setup.

Can I use this on R-410A and A2L systems?

R-410A and standard HFC refrigerants: yes. For A2L (R-32, R-454B) and flammable refrigerants, the safest choice is our HCBK-12DC sparkless BLDC pump — its brushless motor produces no sparks, eliminating ignition risk during evacuation of flammable refrigerant systems. The HCBK-6D uses a standard induction motor and is best kept to non-flammable HFC work.

Can I return an unused pump?

Yes — free returns within 30 days for unused pumps in original packaging with no oil added. Once oil has been added and the pump run, it's considered used. Read our full return policy.

Do you offer fleet pricing on pumps?

Yes — trade pricing on this page, plus volume discounts for shops outfitting multiple service trucks. Email hcproproductsusa@gmail.com with your model mix and quantities and we'll send a custom quote within 24 hours.