Flowserve has released the PSS III split seal, designed for fast and easy replacement in difficult-to-service equipment applications. All fasteners and gaskets are captured in four major components, simplifying installation and greatly improving the likelihood of first-time installation success. The pump and primary driver on the PSS III do not need to be completely dismantled during seal maintenance because the seal installs around the shaft and outside the seal chamber.
Installation tools are included with the seal, and only one wrench is required for the gland bolts, further simplifying maintenance. Because PSS III seal faces are pre-assembled into the drive and gland halves, there is no need to handle the individual faces - reducing the risk of face damage.
The PSS III is designed with an industry-leading pressure capability for split seals - vacuum to 300psig (21bar) in normal operating conditions - and successfully operates after experiencing excursions up to 450 psig (31 bar). The allowable temperature range of the PSS III is 0 to 250degF (-18 to 121degC).
Custom engineered designs of the PSS III meet even more rigorous demands. Other enhancements to the PSS III include an improved seal drive and gland ring, which provide a greater axial holding power and result in the high-pressure rating of the seal. A 0.060in (1.5mm) TIR radial shaft run out capability enables the PSS III to accommodate the most demanding mixer characteristics.
