Non-Contacting High-Pressure Shaft Seal

Type AK 800

Fully pre-assembled unit for high-pressure applications up to 140 bar, designed for steam turbines, turbocompressors and compressors.

Function & Design

How the AK 800 seals

Shaft seal for sealing against the ingress of foreign matter from the environment into the process medium, as well as conversely 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 is carried out in split housings. To seal and isolate the process medium, barrier gas or barrier grease is preferably used during operation. With solids-free process media, recirculation by extraction is also possible.

up to 140 bar Pre-assembled unit For turbomachinery
Shaft seal Type AK 800
Special feature

Single-part sealing ring with banding

The sealing ring is single-part and consists of two components: a carbon ring and a banding into which the carbon ring is shrink-fitted. This makes the sealing ring suitable for high differential pressures.

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.

Applications

Where the AK 800 is used

Shaft seals of type AK 800 are fully pre-assembled units designed for high-pressure applications up to 140 bar, e.g. for steam turbines, turbocompressors and compressors. AK 800 seals are used on rotating shafts (e.g. turbomachinery).

AK 800 shaft seal – top view
AK 800 shaft seal – sealing ring
Field of Application

Technical Data AK 800

Material
A10K
Operating temperature
max. 225 °C
Operating pressure
−0.9 … 140 bar
Circumferential speed
max. 150 m/s
Shaft diameter
20 … 100 mm
Radial gap
1 mm
Scope of supply

Materials & Components

Single-part sealing ring with banding of
Carbon with impregnation, banding e.g. titanium
Housing
Stainless steel, titanium, Hastelloy, PTFE
Downloads
Data sheet (DE) Data sheet (EN)

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