2L Vacuum Pump V-i140SV New Refrigerant R410A Air Conditioning Repair Fiber Model 2Pa 250W 7.2m3 / H With Solenoid Valve ,Outstanding Oil Inlet System

1, high ultimate vacuum, high pumping speed design: two-stage rotary vane design improves the ultimate vacuum and pumping speed reduces the exhaust time of the pump. 2, the structural design of the pump: pump parts with the overall design, while using a cylindrical pin connection between the body, improve product reliability and ease of maintenance of the pump. 3, forced oil inlet design: with internal vacuum pump, which can produce a constant pressure of the oil supplied to the pump chamber and plain bearings, to ensure they are in good state of lubrication and sealing, and windows, low oil level design, more conducive to the use of the product. 4, anti-back oil structural design: the intake port install solenoid valve and vacuum table, when the pointer to the zero position, taking the job is completed, the system automatically cut off after being drawn off; can effectively prevent vacuum pump oil into the container to be working, the working container within a certain period of time to maintain the vacuum state, and to protect the cleaning container. 5, gas ballast design: when the vacuum pump, the gas ballast valve into the amount of non-condensable gas to dust compression chamber to reduce the gas is pumped condensable condensation level in the pump.