CPS 4 CFM 2 Stage Vacuum Pump – Beginner Pump

SKU: 1139


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    The VP4D Pro-Set vacuum pump is a 4 CFM, 2 stage unit with a versatile dual voltage 1/2HP motor. The unit boasts the same high quality, high value features engineered into all of CPS’s Pro-Set Premium Series vacuum pumps providing performance excellence and years of reliable service. (Comes with 1 yr. MFR warranty). We recommend this pump for customers who are starting out or who plan to do composite work moderately.

    this pump is rated for intermittent use. If you want a pump that runs 24hrs a day then need to purchase a continual use rated pump like the following Premium Compressor Vacuum Pump.

    The pumps are 240volt compatible, there is a small red switch next to the power switch that needs to be changed from 115 to 230 as well as a different plug.

    Key Features:

    • Dual voltage operation 110-120V / 220V 50/60Hz
    • Exceptional ultimate vacuum rating as low as 10 microns
    • Advanced air cooled motor design for operation in high ambient temperatures
    • Proprietary oil mist free exhaust port cap for clean, safe job environment
    • Gas ballast valve speeds achievement of deep vacuum
    • Multiple port connections for 1/4″ and 1/2″ ACME
    • Easy maintenance with large oil sight glass and fill port with easily accessible oil drain port.
    • Solid rubber base provides extreme shock resistance
    • Sure grip handle ergonomically designed for superior comfort and portability


    • Stage: 2
    • Motor Size (HP) RPM @ 50/60Hz: 1/2 (HP)2880/3440
    • Dimensions (Inches): 13.1 x 5.5 x 10
    • Weight: 22.1 lb / 10.0 kg
    • Operating Temperature Range: 0°C (32°F) to 52°C (125°F)
    • Power Source: 110-120V / 220V 50/60Hz
    • Ultimate Vacuum: as low as 10 Microns
    • Oil Capacity: 15.5 oz / 450 ml
    • Construction: Heavy Gauge Aluminum Chasis with hard rubber base and rubber lined steel handle
    • Overload Protection: Motor Thermally Protected, Dual Voltage units have extra IEC fuse
    • Control System: ON-OFF power switch
    • Free Air Displacement: 4 CFM @ 60Hz, 96l/m @ 50Hz Intake Fittings: 1/4″ SAE, and 1/2″ACME

    The basic pump will run hot and will smoke some as its burning oil but this is normal. Make sure that you check the oil level on your pump and make sure it’s never overfilled.  All oil filled pumps will put out a mist while there is air moving through the pump. As soon as the chamber gets pulled down to full vacuum, the oil mist usually stops. If you are seeing an oil mist after 30 minutes or so, this usually means you have a leak in your system.

    One thing to note…NEVER shut your pump off while it is under vacuum. Two things can happen. One, when you shut down with the pump under load, you trap some oil in the cycle. Then, the next time you start the pump it puts extra strain on a coupler that joins the motor to the pump itself. This coupler is designed to sheer under extra load to keep from damaging your motor. Repeated stress of starting the pump under load will cause that coupler to fail prematurely. It will also cause the pump to spit oil out the exhaust on the next startup many times.

    It is always best practice to turn on the pump with all valves open and slowly close them. Then, leave the pump running the entire time you are stabilizing so that you are moving the maximum amount of air. Then, when you are done, open the valve and allow the pump to settle down. It will change noise. When the sound smooths out, shut off the pump. This will keep your pump running in good shape for years to come.

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