PSS 02-034-112 - Dripless Shaft Seal 3/4", 1 1/2" Stern Tube

Article BB-02-034-112

€ 397,88

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

- +

Add to cart

The PSS - PYI Type A PSS Shaft Seal is a mechanical face seal with a rotating stainless-steel rotor and a stationary carbon flange. The seal compensates for variable fore and aft movement due to propeller thrust, and the carbon flange can "float" around the shaft to compensate for misalignment and vibration. The stainless-steel rotor is sealed to the shaft with two O-rings and has technical specifications for temperature, pressure, and RPM limits, as well as dimensional details for the shaft, stern tube, and rotor.

Description
Ask a Question

PSS 02-034-112 - Dripless Shaft Seal 3/4", 1 1/2" Stern Tube

The PSS - PYI Type A Shaft Seal is a mechanical face seal designed for marine applications. It creates a seal between the rotating stainless-steel rotor and the stationary carbon flange. The carbon flange attaches to the bellow using hose clamps, while the back of the bellow fits over the stern tube and is secured with additional clamps. The rotor is mounted on the shaft, compressing the bellow before being secured with set-screws.

This compression ensures constant contact between the rotor and the carbon flange, allowing the seal to adjust for fore and aft movement caused by propeller thrust. The carbon flange is over-bored to fit the shaft diameter, enabling it to "float" around the shaft and reduce misalignment and vibration issues.

The rotor is sealed to the shaft with two O-rings recessed into the collar, which rotate with the shaft and rotor, preventing wear during operation.

Technical 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 Ra
- Bellow Material: Molded Nitrile - PVC
Dimensions:
- Shaft Diameter: 3/4"
- Stern Tube Diameter: 1 1/2" to 1 5/8"
- Uncompressed Length: 6.875"
- Approx. Compression: 3/4"
- Rotor Diameter: 2.375"
- Stern Cuff Length: 1.5"