Roots Slide Valve Vacuum Unit (Old Fashioned)

Scope of application:

The Roots slide valve vacuum unit has remarkable energy-saving effect. The vacuum height and high vacuum range have large pumping capacity, which can be widely used in vacuum impregnation and vacuum drying processes of transformers, wires and cables, capacitors in the power industry. It is vacuum coating, vacuum smelting, vacuum heat treatment, vacuum oil filtration, freeze drying; ideal vacuum equipment for aviation simulation test. If a gas containing a small amount of water vapor or a small amount of dust is pumped, a filtering device should be added.

Structure and features:

The Roots slide valve vacuum unit is a vacuum pump consisting of a common Roots pump and a spool vacuum pump. The automatic opening and closing and automatic overload protection of the Roots pump slide valve are realized by a vacuum relay or an electric contact pressure gauge. The entire unit is installed in a rack with piping, valves, electrical control box, and cooling water system. The unit is compact and easy to use.

Depending on the size of the vacuum system and the limit pressure, the ratio of the nominal pumping speed between the pumps of the vacuum unit is between 4:10 and 10:1. The former is more suitable for larger vacuum systems and longer time. Work under low pressure inlet pressure or extreme vacuum. In order to prevent the oil from returning when the spool valve is stopped, this series of units has an electromagnetic inflation valve on the inlet pipe of the front stage. The action is linked with the motor of the foreline pump. When the pump stops the pump, the pump port is inflated to ensure slippage. The vacuum oil in the valve pump returns to the tank while preventing the vacuum system from being contaminated by vacuum oil.