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The NU-CALGON NUCAL-4383-24 Cal-Vac Vacuum Pump Oil is a multi-viscosity lubricant formulated specifically for refrigeration and HVAC vacuum pumps. With a viscosity index of 100, it maintains consistent lubrication across a wide range of operating temperatures and pressures. The oil provides effective sealing at the internal temperatures generated during pump operation and exhibits very low vapor pressure, a critical performance characteristic for achieving deep vacuum levels. HVAC technicians use this oil to keep vacuum pumps operating at peak efficiency during system evacuation work.
Cal-Vac vacuum pump oil is used in residential and commercial HVAC service applications wherever a vacuum pump is required — including system evacuation prior to refrigerant charging, leak-down testing, and moisture removal from refrigerant circuits. The 1-quart container includes a pop-up cap designed for clean, controlled pouring directly into the pump oil port, reducing spills during field use.
Designed as an OEM-style vacuum pump oil replacement for use in refrigeration and HVAC vacuum pumps requiring a multi-viscosity oil with low vapor pressure characteristics.
Vacuum pump oil should be changed by a qualified HVAC technician following the pump manufacturer's recommended service intervals or whenever the oil appears discolored or contaminated with moisture. Always power down and unplug the vacuum pump before draining and refilling oil. Use the pop-up cap to pour directly into the designated oil fill port to avoid contamination. Dispose of used vacuum pump oil in accordance with local environmental regulations.
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