Presentation on theme: "CONTROL VALVES KOSO HAMMEL DAHL V701 Series Venturi Seat Valve."— Presentation transcript:
CONTROL VALVES KOSO HAMMEL DAHL V701 Series Venturi Seat Valve
CONTROL VALVES KOSO HAMMEL DAHL V701 Series Size range: 1” – 16” ANSI Class 150 – 600 –Class 1500 & 2500 also available Body Materials: CS, SS, CM End Connection: Flanged (retains seat ring) Trim –17-4PH and 316SS available –Chrome-Iron for severe services As hard as tool steel, HRC 53 (min.)
CONTROL VALVES KOSO HAMMEL DAHL V701 Design Designed for erosive services –Slurries: Alumina Bauxite –Flashing services: power plants prior to anti-cavitation trims Expanded body reduces fluid velocity by 50% Large diameter stem and long guide engagement
CONTROL VALVES KOSO HAMMEL DAHL Venturi Seat Flow over design Venturi seat reduces outlet velocity as it enters downstream pipe or vessel. Often connected directly to vessel or sacrificial pipe. Reduced trim is standard –Full may be available
CONTROL VALVES KOSO HAMMEL DAHL Actuator Selection Flow over and high seat load require stiff high thrust actuators. –Perfect application for REXA Historically used –Pnuematic pistons (Conoflow) –Hydraulic pistons (Ortman) –Rotomotor (Hammel Dahl) –Some small units have used S/D
CONTROL VALVES KOSO HAMMEL DAHL Rotomotors on 14” V701 in Louisiana
CONTROL VALVES KOSO HAMMEL DAHL Bayer Process To turn bauxite into alumina; Grind the ore & mix it with lime and caustic soda Pump mix into high-pressure containers & heat The aluminum oxide is dissolved by the caustic soda, then precipitated out of this solution, washed, and heated to drive off water. What’s left is the white powder called alumina, which is transformed into aluminum metal in the smelting process.