Split Gap Seal

Type AD 500

Multi-part gap seal with overlapping mortised, gas-tight joints, for significantly lower leakage rates than the AD 200.

Function & Design

How the AD 500 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. During operation, barrier gas or barrier grease is preferably used to seal and isolate the process medium. With solids-free process media, recirculation by means of extraction is also possible.

Gas-tight joints Lower leakage than AD 200 Easy to assemble
Type AD 500 shaft seal
Benefits

Overlapping mortised & gas-tight

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. The sealing ring features overlapping mortised, gas-tight joints, which achieve considerably lower leakage rates compared with the AD 200.

Applications

Where the AD 500 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 500

MaterialA49A10K
Operating temperaturemax. 150 °Cmax. 500 °C
Operating pressure−0.8 to 3 bar−0.8 to 3 bar
Circumferential speedmax. 40 m/smax. 40 m/s
Shaft diameter20…400 mm20…600 mm
Radial gap2.5…5 mm2.5…5 mm

Radial gap: possible deflection between the seal housing and the shaft.

Scope of supply

Materials & components

Sealing ring (multi-part, overlapping mortised)
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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