The dimensions of the 12A3/A0 seal are shown above. Seals A3 in other sizes are shown in the configurator and catalogue card, available at the top of the page.
Legend
- 1. Stationary ring
- 2. O-ring
- 3. Rotating ring
- 4. O-ring
- 5. Spring
General characteristics
Single seal, unbalanced, dependent on the direction of the shaft rotation, central spring.
Range of sizes available
- Shaft diameter: d = 12 ... 80 mm
Operating parameters
- Pressure: < 1.0 MPa
- Temperature: < 200 °C
- Velocity: < 20 m/s (4000 rpm)
Applications
It is a general purpose mechanical seal with a wide range of applications. It is designed to operate with cold and hot water, oils, fuels, not very aggressive chemicals and other liquids containing small amounts of abrasives.
The A3 seal with a central spring is dependent on the direction of the shaft rotation. Looking at the slide ring face, a right handed shaft rotation needs a right handed spring (A3R) and left handed shaft rotation needs a left handed spring (A3L).
Available options
ATEX versions are available.
Available with materials compliant with FDA and EC 1935/2004.
Materials
- Rotating ring: A, B, Q, U, U1, U2, S
- Stationary ring : A, B, Q, S, U, U1, U2, V
- Secondary flexible seals: E, P, V, K
- Spring (springs): G
- Direction of rotation: R, L
- Other metal parts: G
