The C5, C7 and C8 Series pumps are designed specifically for continuous chemical duty service. They are rugged, precision molded, and feature dynamically balanced, enclosed impellers. Units are available in CPVC (Corzan®), fiberglass reinforced Polypropylene, and PVDF (Solef® ) with ratings of 1/3, 1, and 1-1/2 horsepower. The standard mechanical seal is a John Crane Type 21 single seal, carbon/ceramic. Other seal materials are available depending on the process fluid. And, water-wash seals are available for especially aggressive or "crystallizing" liquids. Pump models are also available with a rugged cast iron bearing frame for belt-drive or other coupled drivers.