For more than seventy years, the Henry Pratt Company has provided superior quality valves for pump control applications. Our ball valves are designed to meet or exceed AWWA C507 standards. Pratt ball valves have been tested at 300 psi differential for 10,000 cycles per AWWA C-507, Section 188.8.131.52, proof-of-design requirements and tested bubble-tight at the conclusion of the cycle tests. Ball valves have also been tested to prove their resistance to the effects of cavitation. After several free discharge cycles at 200 psi pressure, a test valve was subjected to a 100 hour continuous cavitation test at 95 psi differential pressure and a valve angle of 25 degrees. Line velocities in excess of 70 feet/second and localized velocities across the seat in excess of 100 feet/second were attained during the tests. At the conclusion of the tests, the valve was bubble-tight at 300 psi.