Single Screen Manual
Automatic

Dual Screen Manual
Automatic

Quad Screen
Manual
Automatic

Six Screen
Manual
Automatic

Welded
Dual Automatic

In Line Flow Hand Operated Strainer -- Available in 2 1/2", 3", 4", 6", 8", 10", and 12" models.  Type DH Hellan Strainers employ two handwheel equipped rotating screens and rigid scraper bars to remove solids from the surface of the screen when the handwheels are rotated. A solids collecting sump is also provided. Cleaning of the type DH is accomplished by opening a valve on the sump flush connection and rotating the handwheels several times. The cleaning cycle must be performed when the strainer is under positive pressure. Type DH strainers can be installed in the vertical up-flow position or in the horizontal flow position with both screens in the horizontal plane, and sump flush connection preferably located at the bottom.

Size	Operation	Flow	Type	Outline Drawing	Pressure Drop Screen	Pressure Drop Wedge
2 1/2"	Hand-Operated	In-Line	DH			N/A
3"	Hand-Operated	In-Line	DH			N/A
4"	Hand-Operated	In-Line	DH
6"	Hand-Operated	In-Line	DH
8"	Hand-Operated	In-Line	DH
10"	Hand-Operated	In-Line	DH
12"	Hand-Operated	In-Line	DH

Inline Flow Automatic Strainer -- Available in 4", 6", 8", 10, and 12" models only. (Type DA) Providing hands-free operation, type DA Hellan Strainers employ two, electric motor-driven rotating screens and rigid scraper bars to remove solids from the surface of the screens when the screens are rotated. A solids collecting sump is also provided. Cleaning of the type DA is initiated when the motor and the flush valve operator are actuated. Controls to accomplish these electrical functions are required. The cleaning cycle must be performed when the strainer is under positive pressure. Type DA strainers can be installed in the vertical up-flow position or in the horizontal flow position with both screens in the horizontal plane, and sump flush connection preferably located at the bottom.

Size	Operation	Flow	Type	Outline Drawing	Pressure Drop Screen	Pressure Drop Wedge
4"	Automatic	In-Line	DA
6"	Automatic	In-Line	DA
8"	Automatic	In-Line	DA
10"	Automatic	In-Line	DA
12"	Automatic	In-Line	DA