PSS Type A – Mechanical shaft seals

PRICE

From $ 300 to $ 2650 USD

FEATURES

This packing-free mechanical seal is a flat face seal that creates a mechanical seal between a dynamic stainless steel rotor and a stationary carbon stator.
The carbon stator is connected to a corrugated rubber bellows and the backside of the bellows is connected to the shaft’s horn tube by metal clamps.
During installation, the stainless steel rotor is used to compress the corrugated rubber bellows. Once compressed, the rotor is secured to the shaft. Compression of the bellows allows the seal faces to maintain constant contact, while compensating for axial movement fore and aft of the shaft caused by the thrust of the propeller on the motor’s anti-vibration mounts.
The inner diameter of the carbon stator is slightly enlarged in reference to the outer diameter of the shaft, allowing it to “float” around the shaft and compensate for misalignment and vibration of the installation.
The stainless steel rotor is sealed to the shaft with nitrile rings. These rings rotate with the shaft and rotor suppressing wear during operation.
This static ring seal allows PSS mechanical seals to be installed on shafts that already have a certain degree of wear or pitting, unlike lip seals that require an absolutely imperfection-free surface for installation and optimum operation. This type of carbon stator is not as sensitive to cooling water flow interruption or operation in dirty water compared to other mechanical seal options on the market.