Non-Contacting Shaft Seal

Type AK 300

Near-contact-free gap seal for higher temperature ranges up to 500 °C, with minimal leakage and high sealing performance.

Function & Design

How the AK 300 seals

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.

To seal and isolate the process medium, barrier gas is preferably used; in certain cases, barrier grease is also possible as an alternative or supplement. With solids-free process media, recirculation into the system by extraction is also possible.

up to 500 °C Minimal leakage Easy to install
Shaft seal Type AK 300
Advantages

Near-contact-free & low-wear

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

Compared with contacting seals, higher circumferential speeds and high pressures can also be achieved. The radially movable arrangement compensates for radial displacements and installation tolerances.

Applications

Where the AK 300 is used

Designed for applications in high- and low-temperature ranges, the chemical industry, food industry and pharmaceuticals, 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.

AK seal, stainless steel design
AK seal with nameplate
Field of Application

Technical Data AK 300

MaterialA49A10K
Operating temperaturemax. 225 °Cmax. 500 °C
Operating pressure−0.2 to 0.5 bar−0.2 to 0.5 bar
Circumferential speedmax. 40 m/smax. 150 m/s
Shaft diameter20…400 mm20…600 mm
Radial gap2 mm2 mm

max. 0.5 bar (max. 300 °C) overpressure when using grease as the barrier medium. Radial gap = possible deflection between seal housing and shaft.

Scope of supply

Materials & Components

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

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