AG Publications Aquafax Equipment Catalogue

PRODUCT GROUP SUBHEAD SHAFT SEALS

www.aquafax.co.uk

MAIN HEADING PSS SHAFT SEALS

PSS SHAFT SEALS The PSS Shaft Seal uses the highest quality materials and manufacturing procedures to give a drip free performance with zero wear to the propeller shaft. They require no lubrication other than water. A fitting is provided on the carbon flange to accept a low pressure feed from the engine’s water exhaust to assist cooling.

PSS SHAFT SEAL Features:

Hose Barb

• Dripless operation. • Maintenance free.

PYI Clamp

Washer

Set Screws

• Eliminates shaft wear. • No mess or corrosion. • ABS, Bureau Veritas & RINA certified. • Over 200,000 in operation all over the world. • Suitable for leisure & commercial craft. • Unaffected by engine movement or vibration. • Manufactured in the USA. • Metric & imperial sizes for shafts from 20mm - 3/4" to 95mm - 33/4". • The carbon/graphite flanges & rotor should never need replacing under normal operating conditions. THE PRINCIPLE The seal is created by a hydrodynamic bead of water between the carbon stator flange and the stainless steel rota. This provides a dripless operation, lubrication and keeps the running faces cool between the two sealing faces. The carbon sealing flange and bellows assembly is fitted to the stern tube using twin hose clamps. The compression of the bellow allows the sealing faces to remain in constant contact whilst compensating for minor fore and aft movement of the shaft caused by the propeller thrust pushing on the engine mounts.

Nylon Bushing

Washer

Rotor

Nitrile O Rings

66

PYI Clamp Jacket

Bellow

Carbon Stator

Hose connection for high speed/planning craft applications*

Double set screws

TO ENGINE TRANSMISSION COUPLING

Nitrile flexible bellows

Twin nitrile 'O' rings

Sterntube

Stainless steel rota

Carbon stator flange

Double hose clamps

* A water feed is recommended for boats exceeding 10 knots or connected as a breather hose for vessels operating at slow speeds.

TECHNICAL SPECIFICATIONS: • HIGH DENSITY CARBON GRAPHITE FLANGE

Once installed and operational the carbon/graphite face will polish the stainless steel rotor during the initial first few minutes of operation ensuring a perfect fit thus eliminating any drips or spray. The ultra dense carbon/graphite composite has a maximum operating temperature of 260ºC (500ºF), guarding against failure by over heating as can occur on rubber and plastic based seals. • STAINLESS STEEL ROTOR The one-piece, 316 grade stainless steel rotor is secured to the propeller shaft with double set screws. The twin nitrile ‘O’ rings are stationary and do not wear. • REINFORCED BELLOWS The heavy reinforced nitrile bellows are resistant to petroleum based products and retain their preset dimensions. They provide the best combination of durability, strength and elasticity.

PSS Complete Kit