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.)

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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

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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

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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

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KOSO HAMMEL DAHL

Bayer ProcessTo 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.

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KOSO HAMMEL DAHL

Bauxite Processing

• Digestion

• Clarification

• Precipitation

• Calcincation

CONTROL VALVES

KOSO HAMMEL DAHL

CONTROL VALVES

KOSO HAMMEL DAHL

Valtek - Survivor• This is what

Valtek does – Unbalanced– Flow over– Piston

• Optional PSZ ceramic trim

• Fisher – 461• Caldera Eng.

CONTROL VALVES

KOSO HAMMEL DAHL

Industrias Controlpro S.A. de C.V.Blvd. Antonio L. Rodríguez No. 3058 Desp. 404-B Plaza Delphi

Col. Santa Maria, Monterrey Nuevo León C.P. 64650Teléfonos: (81) 8356-2582, (81) 8356-1907, (81) 8356-1898

icontrolpro@prodigy.net.mxwww.industriascontrolpro.com