PSS 02-314-412 - Dripless Shaft Seal 3 1/4" 4 1/2 Stern Tube

Article BB-02-314-412

€ 2.643,57

1-2 weeks delivery time
Price incl. 19% VAT

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The PSS Type A Shaft Seal is a mechanical face seal designed for marine applications, using a rotating stainless-steel rotor and a stationary carbon flange to create a watertight seal. It compensates for shaft movement, propeller thrust, and vibrations, ensuring reliable performance. The bellows are clamped to the stern tube, while O-rings seal the rotor to the shaft without wear. This design allows for temperature, pressure, and RPM limits suited to demanding conditions, with dimensions tailored for precise installation.

Description
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PSS 02-314-412 - Dripless Shaft Seal 3 1/4" 4 1/2 Stern Tube

The PSS Type A Shaft Seal is an advanced mechanical face seal designed to provide reliable performance for marine applications. It creates a seal through the contact of a rotating stainless-steel rotor and a stationary carbon flange. This design helps maintain a watertight seal while compensating for propeller thrust, shaft movement, and vibrations, ensuring long-lasting durability and functionality.
- The stationary carbon flange is secured to the bellows with hose clamps, while the bellows fit over the stern tube and are clamped in place.
- The stainless-steel rotor is mounted on the shaft and compresses the bellows, ensuring a constant seal between the rotor and carbon flange.
- O-rings in the rotor’s collar ensure a secure fit to the shaft without wear during operation.
- The carbon flange is slightly oversized to float around the shaft, compensating for alignment and vibration issues.
Specifications
- Temperature Limits: 5°F to 225°F (-15°C to 107°C)
- Pressure Limits: 15 PSI (1 BAR)
- Shaft RPM Limits: 10,000 RPM
- Carbon Graphite: Lapped to 4 HLB (0.000044" tolerance)
- 316SS / Nitronic 50: Faced to 9-12 Ra
- Bellows Material: Molded Nitrile - PVC
Dimensions
- Part #: 02-314-412
- Shaft Diameter (A): 3-1/4"
- Stern Tube Diameter (B): 4-1/2" to 4-5/8"
- Approx. Length (C): 10.8625"
- Approx. Compression: 1"
- Rotor Diameter (D): 6"
- Stern Cuff Length (E): 2.5"