Product Name: Ductile Cast Iron Products Vacuum Pump Parts Rotor Sand Casting Model NO.: sand casting iron Certification: CE Standard: Customize Surface Roughness: Ra12.5 Surface Treatment: Sand Blast Material: Iron Machining: Pump Application: Hardware Sand Core Type: Resin Sand Core Casting Method: Directional Crystallization Type: Clay Wet Sand Size: Customerized Transport Package: Wooden Packing Specification: cast iron Origin: China Product Description The rotary vane vacuum pump is composed of a pump body, a rotor, a rotary vane, an end cover, a spring, etc. A rotor is eccentrically installed in the cavity of the vacuum pump, and the outer circle of the rotor is tangent to the inner surface of the pump cavity (there is a small gap between the two) , Two rotors with springs are installed in the rotor slot, which divides the stator into two working chambers (high and low-level working chambers). During rotation, the top of the rotors keep in contact with the inner wall of the pump cavity by centrifugal force and the tension of the spring , The rotation of the rotor drives the rotor to slide along the inner wall of the pump cavity, so that the volume of the high-level working cavity is periodically expanded and inhaled, and the volume of the low-level working cavity is periodically reduced to compress the gas, and the gas and oil pressure is pushed to open the exhaust valve to exhaust, thereby obtaining vacuum.