PSS PRO Shaft Seal, 2 in. Shaft and 3-1/2 in. Tube, 03-200-312

The PSS PRO Shaft Seal is a mechanical face seal designed for marine applications requiring increased durability in demanding, corrosive, or high-pressure environments. This unit features reinforced silicone bellows, a secondary shaft retention collar, and high-grade 316 stainless steel hose clamps with rolled, non-perforated edges. The seal utilizes a stainless steel rotor and a stationary carbon flange to maintain a constant seal while accommodating axial movement and driveline vibration.

Key Specifications:

• Manufacturer Part Number: 03-200-312
• Shaft Diameter: 2 in.
• Stern Tube Diameter: 3-1/2 in. to 3-5/8 in.
• Temperature Range: -13°F to 425°F (-25°C to 220°C)
• Pressure Limit: 40 PSI (2.75 BAR)
• RPM Limit: 10,000 RPM
• Bellow Material: Molded silicone and fabric
• Uncompressed Length: 9.268 in.
• Compressed Length: 8.268 in. (approx.)
• Rotor Diameter: 3.75 in.
• Stern Cuff Length: 1.3 in.

The sealing surface is created between the stainless steel rotor and the stationary carbon flange, which is over-bored to allow it to float around the shaft, compensating for potential misalignment. Two O-rings recessed into the rotor's bore provide a seal to the shaft without experiencing operational wear.