Catalog 4234 39 Parker Hanni n Corporation Instrumentation Products Division Huntsville, AL USA www.parker.com/icd Medium Pressure Ball Valves Introduction Parker HB4 Series Ball Valves are engineered and manufactured to provide reliable shut-off or switching functions. compact and rugged design incorporates spring-loaded seats for high cycle life and low operating torques at to 10,000 psi (689 bar). Every HB4 Series Ball Valve is manufactured with Parker SUPARCASE R trunnions and ball to resist corrosion, seizures, and particle abrasion. SPECIFICATIONS: Pressure rating: 10,000 psi (689 bar) ...