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Material:The Life Guard seal utilizes silicon carbide (SiC) for its seal surfaces(primary ring and mating ring). This is more abrasion resistant thanthe carbon graphite and ceramic used in standard seals. SiC alsoruns cooler if the pump is run dry, improving the life of the seal.Mating Rings:The O-ring style of the Life Guard seal mating ring allows heatto dissipate into the pump casting. This keeps the seal at a lowertemperature and dramatically improves the chances of the seal tosurvive a dry-run episode.Balance:The bellows and primary ring of the Life Guard seal are pressurebalanced. This results in cooler operation at higher pressures.Life Guard silicon carbide seals are available in the following models:Pedestal mount, Flange mount, Clutch-driven, Hydraulically-driven,Belt-driven, and Gas Engine-driven.
Advantages over Standard: The hardness of Silicon Carbide approaches that of diamond and allows the seal to have outstanding service life when pumping abrasive solutions. Carbon graphite flakes are embedded into the silicon carbide faces to increase lubricity and provide survivability against incidental dry run and thermal shock.
Pro:• Extended service life in abrasive solutions Enhanced dry run resistance Drop-in replacement for standard sealCon:• Does not eliminate dry run failure Susceptible to chemical & fertilizer bonding failures Increased cost