Dual Free Flow Slurry Ball Check Valve (DFFV)
Dual Free Flow Slurry Ball Check Valve (DFFV)
Dual’s Free Flow Valve operates on the discharge side of the pump. As the flow through the pipeline starts or stops, the ball automatically rises or falls, opening or closing the valve. This occurs without noticeable shock or hammer, regardless of the line pressure or the speed of closure.
DFFV Features
• Long ball life due to ball rotation.
• Long seat life, Seats are out of the flow and can be rotated in line to increase seat life fourfold.
• Easy maintenance. Seat and ball can be inspected or replaced without removing the free flow from the pipeline.
• Virtually maintenance free because of the simple design.
• Rotating and floating ball – self adjusts to flow.
• Self cleaning due to the freely rotating ball.
• Full port opening. No obstruction to the flow.
• Virtually no pressure drop. Eliminates pipe hammer.
• Can be installed in the horizontal and vertical position.
Product Specifications
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SIZE RANGE: |
80mm – 750mm. |
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OPERATING TEMPERATURES: |
80˚C. (For higher temperatures, please consult our factory). |
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BODY TYPE: |
Carbon Steel or Stainless Steel. |
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PRESSURE RATING: |
16, 25, 40, 80 and 100 Bar. |
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VALVE LINING: |
Natural Rubber lined. A range of elastomer grades are available for corrosive duties (Urethane or Ceramic). |
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BALL: |
Carbon Steel, Urethane Coated or Stainless Steel. (Other elastomers are also available). |
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SEAT: (Replaceable) |
Abrasive Resistant AR Steel (500 Brinnell hardness), Urethane or Stainless Steel. |
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VALVE TYPE: |
Flanged. |
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FLANGE DRILLING: |
AS, ANSI, DIN, SABS or BS. |
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FLUSHING PORT: |
Fitted to the upper ball body. |
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MATERIAL CERTIFICATION: |
Certified Chemical and Physical test reports can be supplied. |