Maag Witte GmbH products

The single mechanical seal with buffered fluid (AD) in specially designed for vacuum conditions on the suction side. It is suitable for maximum viscosity of 100 Pas. Min. suction pressure: vacuum, Max. suction pressure: 5 bag (75 psig), Max. temperature: 250°C (500°F), Viscosity : 0,2 to 100.000 mPas (cP)

The single mechanical seal (ED) is the standard seal for WITTE CHEM pumps. It is suitable for max. viscosity of 10 to 50 Pas. Min. suction pressure: 1 bar (15 psig), Max. suction pressure: 15 bar (215 psig), Max. temprature: 300°C (580°F), Viscosity; 0,2 to 50.000 mPas (cP).

The double mechanical seal with buffered fluid (DD) is suitable for a max. viscosity of 1.000 Pas, because the internal parts of the mechanical seal do not get in contact with the pumped fluid. All the internal parts are lubricated by the buffer fluid. The pressure on the suction side can be within a wide range: from vacuum conditions to max. 15 bar. Min. suction pressure: Vacuum, Max. suction pressure: 15 bar (psig), Max. temperature : 300°C (580°F), Viscosity: 0,2 to 1.000.000 mPas (cP).

The stuffing box is a simple seal for WITTE gear pumps. The operative range is similar to the viscoseal. It is suitable from low to high viscosities. The standard material for the packing rings is graphite (other materials are available). It is also available with buffered fluid and/or heating jacket.

The vacuum viscoseal with buffered stuffing box is the standard seal for WITTE POLY pumps. It is a combination of a dynamic (viscoseal) and a static (stuffing box) sealing system. The polymer flow back to the suction side is adjusted by a needle valve. The fluid barrier ensures that no air from the atmosphere gets in the pump/reactor. There is a buffered and heated stuffing box for back-up. To prevent failure/destruction of the packings, it is strongly recommended to heat the area of the stuffing box.