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The FGP Series Liquid Ring Vacuum Pump is designed and manufactured to strict standards and well proven experience with this type of equipment in the chemical industry. These pumps work following the liquid ring principle.

Design Features:

• Single stage valve-less pump
• Free floating impeller
• Large dimensioned shaft and bearings
• Oil-lubricated antifriction bearings
• Adjustable shaft at the rear axial bearing for easy impeller clearance adjustments
• Shaft seal by means of stuffing box or double mechanical seal
• Liquid ring pumps have only one moving part, the rotor. Without any parts sliding or rubbing against each other in the pumping area, there is only slight friction. This is one of the reasons for the high reliability (minimum maintenance) and long service life of the liquid ring vacuum pump.
• The heat compression of the gases is carried off by the service liquid.
• The compression is almost isothermal. As a result, the gas handled cannot be overheated.

Materials:

• Parts in contact with the liquid or gases (such as casing, cover with control slots and intermediate ring) are made of ceramic FRIKORUND^® with a cast iron armour.
• Free floating impeller, made of ceramic FRIKORUND^®, glass-filled PTFE or metals such as Titanium, Hastelloy or Zirconium.

Vacuum Pump Installation:

• Liquid ring pumps require a service liquid. In the pump, the sucked-in or pulled-in gases are mixed with the service liquid, and a certain portion of the corrosive gas may dissolve in and make the service liquid corrosive.
• Due to the corrosion resistant materials of the pump and other system components, the condensate gases and other acids may also be used as service liquids. Due to the corrosive nature of the service liquid, it is usually necessary to keep it in a close-loop system.
• In addition to the pump, the system also has a separator vessel with PTFE lining or rubber coating with integrated cooling coils in special metals e.g. Titanium, Hastelloy, Zirconium or Tantalum. Alternatively graphite heat exchangers may also be used.
• All system components, i.e. pumps, separator, cooler are connected with pipework (piping in steel with PTFE lining or rubber coating). These components may be assembled on a common base frame for a compact installation.

Fields of Application:

• Chemical and pharmaceutical industry and chemical process engineering.
• Aggressive gases, particularly when pumping moist chlorine and gases contain HCl
• In vacuum service these pumps are normally capable of capacities up to 600 m3/hr and suction pressures up to 100 mbar. Combined with an auxiliary ceramic gas jet pump, up to 30 mbar can be achieved.
• In compressor service this pump can be used up to 2 bar.