Hellan Fluid Strainers

Hellan

HELLAN FLUID STRAINERS

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Company Profile
The Hellan Strainer’s unique, patented, self-cleaning design was named after it Norwegian inventor. Haakon Hellan.

In 1963, Cleveland Gear Company,Inc. purchased the design and incorporated its own worm gear speed reducers to create a motorized strainer model. The complete Hellan Strainer line manufactured by Cleveland Gear Company, Inc. became a part of the Vesper family in 1980.

In 2000, Hellan was made a subsidiary of Vesper Corporation as The Hellan Strainer Company.

Hellan Strainers are ISO9001 certified, meet all Navy Mil-Spec requirements, are approved by the American Bureau of Shipping, listed by Underwriters Laboratories and designed in accordance with FCI and ASME requirements.

Products/Capabilities
Hellan Strainers are cast in sizes from 2″ to 20″ and fabricated in larger sizes. The nature of the fluid to be strained determines the material of the casting. Cast iron models are most common for fresh water applications. Cast steel can be used for higher pressure or where water hammer occurs. Stainless steel is used for highly corrosive fluids and bronze is used for seawater applications. Since the degree of straining required differs widely by application, a broad selection of perforated metal screen sizes are offered, as well as screens utilizing fine wedge-wire filtration.

 

 

3THE HELLAN STRAINER DESIGN PROVIDES SOLIDS REMOVAL WITHOUT INTERRUPTING THE FLUID FLOW

Instead of trapping solids in a basket which then must be removed for frequent clean-outs, the Hellan Strainer removes the solids from fluid without stopping the flow or disassembling the strainer. The sequence of operation is illustrated below.

❶ Fluid passes into the strainer and through a screen.

❷ A deflection rib protects the screen from large objects.

❸ The screened fluid flows out of the strainer and into service.

❹ Rotating the screen, by either handwheel or motor, moves the outer screen surface against a scraper bar.

The scraper bar removes collected debris from the screen’s outer surface.

❺ Debris moves to the sump area of the strainer where it is removed by periodic flushing.

SPECIAL FEATURES PROVIDE CONVENIENCE

AND HIGH PERFORMANCE.

❻ Large inspection ports, sealed with O-rings, permit easy, external adjustment of the scraper bar. Multiple screen models size 4″ and larger, plus 3″ single screen.

❼ O-rings at the screen cover plate and shaft provide a tight seal while allowing operation at low torque.

➑ Backwash system is available to remove debris from screen.

➒ Eductor is available at discharge for low-pressure applications.

 

PRODUCTS LISTING:

Handwheel

Automatic

 p1  p2

2″, 2 1/2″, 3″  Angled Flow Body — Single Screen

 p3  p4

1-1/2″, 2″, 2-1/2″, 3″ Inline Flow Body – Single Screen

 p5  p6

2 1/2″, 3″, 4″, 6″, 8″, 10″, 12″ Inline Flow Body — Two Screens

 p7  p8

14″ and 16″ Inline Flow Body — Four Screens

 p9  p10

20″ Only Inline Flow Body — Six Screens

 p11  p12

14″  to  36″ – Welded Dual Automatic

 


For further information, please contact your Daparak Sales Representative, email us:quote@daparak.com, or call 757-744-9388.