State of the art vacuum technology
PVR vacuum pumps are oil lubricated rotary vane vacuum with an oil recirculation system. They offer high performance and quality levels. They are characterized by fast pumping speed in absolute vacuum between 850 and 0.1 mbar (a), low noise level, no pollution, durable construction and easy maintenance. They are used for pumping air in continuous industrial use, also in presence of water vapor.
Rotary vane pump operating principle
The operatng principle is demonstrated in the drawing below. The pump has three vanes, sliding in a rotating eccentric rotor and thus forming air tight pertitions, that transport and compress the pumped gas to the atmosphere at the pump discharge.
At the pump inlet there is a built-in mesh filter that protects the pump from solid particles. Built-in non-return valve prevents reverse flow of air and oil to the vacuum chamber during shutdown. They are connected to a flanged electric motor and cooled by a fan with a guided air current. The oil is cooled in a separate oil cooler and filtered in an oil filter.
The oil tank, which is integrated into the pump body, has a system for separating the oil vapors from the discharge air (maximum permissible residue 2ppm by weight, corresponding to 2.4mg / m³). Separated oil whose level is monitored by appropriate indicators is automatically recovered from the pump.
In case of water vapor suction, a suitable gas-ballast valve injects air to a specific point in the compression phase and differentiates the saturation pressure of the air vapor mixture, thereby preventing condensation inside the pump without affecting its operation.
Single stage monobloc vacuum pumps EM Series
The EM series, with flowrate up to 40m3/h, is formed by lubricated vane vacuum pumps extremely compact and light thanks to their monobloc design. They are easy to install and service. The use of the gas ballast valve allows to get rid of vapours (starting from the 8 m3/h pump). The EM series are vacuum tight units thanks to the presence of the non-return valve.
Compact vacuum systems with roots vacuum pumps
Vacuum systems have been designed for those customers who need to couple vane vacuum pumps to Roots pumps. This solution allows to achieve higher capacity with higher ultimate pressure (up to 1 x 10-5 mbar) in a relatively small space. The maximum flowrate can reach 5000m3/h or more. Technical features of the system can be tailor-made according to customer’s requirements.
Two-stage oil sealed high vacuum rotary vane vacuum pumps
PHV-K series allow to achieve higher vacuum and capacities, easy installation, operation and maintenance. The pumps have been designed for all types of applications such as laboratories, semi-conductor industries, measurement instruments, light bulbs, fluorescent lights, distillation, refrigeration, freeze drying, mass spectrometry, as backing pumps in pumping systems, leak detectors, etc.