Metal Seated Ball Valve


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, 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.

Sizes: 6 through 48 inches
Pressure Class: ANSI B16.1 CL.125 or CL.250
Pressure Ratings: 150 or 300 psig
Shafts Available:

  • ASTM A564
  • Type 630 H1150 (17-4 PH)
  • Stainless Steel

Actuators Available:

  • Manual
  • Cylinder
  • Motor
Feature Benefit
Pressure Assisted Metal Seat – Long life
– No scraping, galling, or wedging during operation
– Field adjustable
Cast Ductile Iron Construction – Rated for 300 PSIG service*
– Superior impact resistance
– Higher strength than cast iron
Trunnion Mounted Bal – Resists deflection
– Allows smooth operation
100% Full Port Body Design – Head loss equal to an equivalent length of straight pipe
– Lower pumping requirements result in reduced power costs
– Operates equally well at high or low velocities without cavitation
Self Flushing Operation – Ideal for waste water pumping applications
– Suitable for continuous throttling applications