Name: Javac 2-Stage Vacuum Pump 420 L/min R32 DD400
Brand: Javac
SKU: DD400
Price: 2599.99 AUD
Availability: InStock

Javac 2-Stage Vacuum Pump 420 L/min R32 DD400

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Javac DD400 2-Stage Vacuum Pump – 420 L/min

Accelerate your commercial HVAC-R workflow with the powerhouse Javac DD400, designed for rapid, deep evacuation of massive systems.

When tackling large-scale commercial plant rooms and extensive pipe runs, the Javac DD400 delivers professional-grade performance. Featuring heavy-duty, dual-stage oil rotary vane technology, this pump provides a massive 420 L/min displacement and pulls down to an ultra-deep 5 microns. Engineered specifically for demanding environments, it ensures moisture and non-condensables are completely removed with speed and precision.

Key Trade Benefits

✔ High-Volume Efficiency: 420 L/min flow rate reduces evacuation time on large commercial systems.
✔ Ultra-Deep Vacuum: 2-stage design achieves 5 microns for total system dehydration.
✔ A2L Compliant Safety: Specifically engineered for safe use with R32 and R1234yf refrigerants.
✔ System Protection: Built-in automatic solenoid valve prevents oil back-suck during power failures.
✔ Versatile Connectivity: Includes a tri-connector fitting for 1/4", 3/8", and 1/2" SAE hoses.

Technical Specifications

Pump Design	2-Stage Oil Rotary Vane
Displacement	420 Litres / Minute
Ultimate Vacuum	5 Microns
Compatibility	A2L (R32, R1234yf) and standard HFC/HCFC
Fittings	Tri-Connector (1/4", 3/8", 1/2" SAE)
Oil Capacity	880 ml

Expert Tip:

To maintain the 5-micron capability, change your vacuum pump oil frequently, especially after evacuating wet or contaminated systems. Regular oil maintenance protects the internal rotary vanes from corrosion and ensures peak performance.

Common Questions for Javac 2-Stage Vacuum Pump 420 L/min R32 DD400

Why do I need a 2-stage pump over a 1-stage pump?

A single-stage pump typically bottoms out around 50–100 microns, which can leave residual moisture. The dual-stage (2-stage) design uses two rotors in series to pull a much deeper vacuum down to 5 microns, ensuring total dehydration and preventing acid formation.

What does the automatic solenoid valve do?

If power is lost while under vacuum, the negative pressure would normally suck pump oil into the A/C system. The automatic solenoid valve instantly closes upon power loss to isolate the pump and prevent oil contamination.

Is this pump safe for R32 refrigerants?

Yes. The DD400 is fully A2L compliant and engineered for safe operation with mildly flammable refrigerants like R32 and R1234yf.