Temperature Limits -13°F to 425°F (-25°C to 220°C) Working Pressure Up to 25 PSI (1.75 BAR) Max Pressure 50 PSI (3.5 BAR) Shaft RPM Limits 1,500 RPM Carbon Graphite Lapped to 4 HLB (0.000044” tolerance) 316SS / Nitronic 50 Faced to 9 Ra Bellow Material Mandrel formed silicone / fabric TECHNICAL SPECIFICATIONS
Carbon stator insert
Acetal hub
FLANGE & BLADDER MOUNTED Ideal for retrofit or new construction installations, this system includes the standard Type C Seal and is designed as a bolt on application. The internal tube will support the weight of the acetal/carbon stator so it stays centered to the shaft. Available in aluminum, mild steel or 316L, this mounting system is machined to match your specific application/ existing flange pattern and is offered “pre-drilled” to your bolt pattern, size and spacing, or supplied “blank” for simplicity and drilling at the time of installation. 1. This clamp assembly maintains the PSS Type C preload/compression. 2. Nitronic 50 SS rotor surfaced to 9 Ra finish. 3. Machined acetal hub with carbon stator insert, lapped to 4 HLB. 4. Water is plumbed into the PSS Shaft Seal for cooling/lubricating the seal faces on high speed vessels. 5. Reinforced Silicone bellow houses the stationary acetal/carbon stator and is secured to the provided stern tube. 6. T-Bolt style hose clamps secure the bellow to the stern tube and the acetal/carbon stator in the bellow. 7. Flange manufactured from your choice of aluminum, mild steel or 316L stainless steel. The inflatable bladder allows the operator to seal the stern tube, while the shaft is not rotating, in order to inspect, clean, or work forward of the seal. In addition, if the decoupling of the shaft is needed, this operation can be done in the water as the shaft can be moved aft with bladder inflated with minimal water intrusion occurring.
Air Valve
Inflatable Bladder
Air Valve Flange
Flange
Air Valve
Water
Water
BLADDER DEFLATED Allowing water flow.
BLADDER INFLATED Closing off water flow.
TO ORDER VISIT WWW.PYIINC.COM OR CALL 425-355-3669
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PSS SHAFT SEAL |
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