Non-Contacting Shaft Seal

Type AD 200

Low-contact gap seal with minimal leakage and high sealing performance, for high pressures and surface speeds in demanding applications.

Function & Design

How the AD 200 seals

A shaft seal for sealing against the ingress of foreign matter from the environment into the process medium as well as against the escape of process medium into the environment. It seals the sealing gap between a stationary housing and a rotor (shaft) rotating relative to it, using sealing rings arranged one behind the other in the axial direction.

Installation takes place in split housings. Barrier gas is preferably used to seal and isolate the process medium; in certain cases barrier grease is also possible as an alternative or supplement.

Minimal leakage High pressures Multi-part & easy to assemble
Type AD 200 shaft seal
Benefits

Low-contact & low-wear

Thanks to the multi-part design, the sealing rings are easy to assemble. Due to the inherently small clearance at the joints, a low-contact gap seal is achieved after an initial run-in period, with minimal leakage and thus high sealing performance.

Compared with contacting seals, higher surface speeds and high pressures can also be achieved. The radially movable arrangement allows radial displacements and installation tolerances to be compensated.

Applications

Where the AD 200 is used

Designed for applications in high- and low-temperature ranges, the chemical industry, the food and pharmaceutical industries, pumps and much more. For sealing shaft passages in radial and axial fans, mills, mixers and centrifuges, for both rotating (e. g. turbomachinery) and reciprocating (e. g. piston rods) applications.

Sealing flange with threaded ports
Flange seal with bolted connection
Split housing with labyrinth rings
Application range

Technical Data AD 200

The AD 200 is available in two material versions, A49 and A10K.

MaterialA49A10K
Operating temperaturemax. 220 °Cmax. 500 °C
Operating pressure−0.9 to 20 bar−0.9 to 20 bar
Circumferential speedmax. 40 m/smax. 150 m/s
Shaft diameter20…400 mm20…600 mm
Radial gap1…5 mm1…5 mm

Radial gap = possible deflection between the seal housing and the shaft. When using grease as the barrier medium, max. 0.5 bar overpressure.

Scope of supply

Materials & components

Sealing ring (multi-part)
Carbon with impregnation, PTFE, PEEK, bronze
Spring
Stainless steel, titanium, Hastelloy, Inconel etc.
Locking / anti-rotation device
Stainless steel, titanium, Hastelloy, Inconel etc.
Housing
Stainless steel, titanium, Hastelloy, PTFE
Downloads
Data sheet (DE) Data sheet (EN)

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