PSS 02-334-700 - Dripless Shaft Seal 3 3/4", 7" Stern Tube

PSS 02-334-700 - Dripless Shaft Seal 3 3/4", 7" Stern Tube

The PSS 02-334-700 Dripless Shaft Seal is engineered to provide a reliable and efficient sealing solution for stern tubes. This innovative product utilizes a mechanical face seal design to ensure optimal performance in marine applications.

The Type A PSS Shaft Seal features a sealing interface formed between the flat surfaces of a stainless-steel rotor and a carbon flange. The carbon flange is securely attached to the front of the bellows using hose clamps, while the rear of the bellows is fitted over the stern tube and also secured with hose clamps. The rotor is mounted on the shaft in front of the carbon flange, where it compresses the bellows before being fixed to the shaft with set screws. This pre-load maintains a constant contact between the rotor and flange, allowing the seal to adjust for the forward and backward movement caused by propeller thrust. Additionally, the carbon flange is designed to float around the shaft, effectively addressing misalignment and vibration issues.

The stainless-steel rotor is sealed to the shaft using two O-rings that are recessed into the collar's bore. As these O-rings rotate with the shaft and rotor, they experience minimal wear during operation.

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 9-12 Ra
• Bellows Material: Molded Nitrile - PVC

Part Details

• Part #: 02-334-700
• Shaft Diameter (A): 3-3/4"
• Stern Tube Diameter (B): 7" to 7-1/8"
• Approx. Length (C): 11.675"
• Approx. Compression: 1"
• Rotor Diameter (D): 6"
• Stern Cuff Length (E): 2"