PSS Shaft Seal 02-100-112 Dripless Packless Shaft Seal 1" Shaft

The PSS Shaft Seal 02-100-112 is a premium dripless mechanical face seal designed to replace traditional packing glands on marine propeller shafts. This packless sealing system eliminates the constant dripping, maintenance, and shaft wear associated with conventional flax packing boxes, providing a completely watertight seal for dry bilges.

Key Features:

• 100% watertight mechanical face seal - no dripping or bilge pumping required
• Precision-machined 316 stainless steel rotor with carbon-graphite stator
• Self-compensating design handles propeller thrust and shaft misalignment
• Flexible nitrile-PVC bellows with dual O-ring shaft sealing
• Certified by Bureau Veritas, ABS, and RINA for marine applications
• Installed as standard equipment by leading boat builders worldwide
• Can be retrofitted to replace leaking packing glands

Technical Specifications:

• Shaft Diameter: 1 inch
• Stern Tube Diameter: 1-1/2" to 1-5/8"
• Total Uncompressed Length: 6.975 inches
• Compressed Length: 6.225 inches
• Rotor Diameter: 2.375 inches
• Carbon Cuff Diameter: 2 inches
• Stern Cuff Length: 1.5 inches
• Temperature Range: 5°F to 225°F (-15°C to 107°C)
• Pressure Limit: 15 PSI (1 BAR)
• Maximum RPM: 10,000

How It Works:

The PSS creates a seal between the rotating stainless steel rotor (mounted on the shaft) and the stationary carbon flange (attached to the stern tube). The rotor compresses the flexible bellow to maintain constant contact between sealing surfaces, compensating for propeller thrust movement. The carbon flange is over-bored to float around the shaft, handling misalignment and vibration. Two recessed O-rings provide additional sealing without experiencing wear during operation.

Maintenance:

Requires minimal maintenance compared to traditional packing. The bellow should be inspected regularly for wear or deterioration, with replacement recommended every six years. Includes hose barb fitting for optional cooling water feed on vessels operating above 12 knots.