Continuous Flow:

The Fluid Engineering 774 Strainer Package is designed to handle a consistent flow of debris laden influent. The dual strainer design offers a unique design in that it allows a continuous cleaning without interruption for extremely long periods of time. The single Fluid Engineering Automatic Strainer offers continuous debris removal and uninterrupted flow, having two units in one package eliminates any problems that may occur due to natural mechanical failure or fatigue. If one unit requires any sort of maintenance the flow continues through the unit in operation.

Plug and Play:

The completely assembled unit also offers the ability to virtually "Plug and Play". The package is set in place, attached to the application inlet, outlet, backwash, and drain, power wired to the control package, and the equipment is ready for full operation literally saving thousands of dollars in construction and assembly costs.

Standard Design:

Two complete Fluid Engineering ELIMINATOR® 753 Automatic Strainers. Skid assembly is a steel I-Beam construction. Sequence Control Package including a NEMA 4 Enclosed Panel, Electronic Backwash Valve for each strainer, and Dual Element Differential Pressure switch also for each strainer.

Application:

The Eliminator's® patented unique strainer element design permits installation in virtually any piping system operating at a positive pressure. The Eliminators® can operate through a wide range of operating pressures (10 psig minimum) and solids loading with effective debris removal and backwashing across the entire pressure range. Additionally, only one drain/backwash connection is required for installation effectively eliminating the expense of a separate backwash connection. Strainers are used to protect equipment such as valves, pumps, meters, heat exchangers, or spray nozzles, as well as in feed water and process water applications or virtually any similar application.

Proven Features Include:

• Patented rugged screen and mechanical assist backwash mechanism extends useful service life.
• Unique clog-resistant straining element reduces maintenance downtime.
• Unique adjustable accelerator plate aids cleaning in difficult applications.
• All internal replacement parts supplied in corrosion resistant material.
• Efficient proven design reduces maintenance requirements; requires fewer parts.
• Flats for manual operation in case of power failure.
• Low rpm backwash mechanism provides more efficient cleaning, less wear of internals.

Straining Element:

The Eliminator® features a revolutionary reverse rolled wedge-wire straining element (Figure. 3) that is extremely rugged and more clog resistant than conventional strainer elements that use perforated plate or wire mesh screens.

This proven state-of-the-art straining media is fabricated by wrapping vertical rods with wedge shaped profile wire. Each intersection of rod and wire is welded to produce an extremely rugged one-piece element. This forms a continuous slot that allows only two-point contact with debris particles to reduce clogging.

The wedge shaped profile wire reduces the possibility of retaining debris smaller than the screen opening which historically has been the cause of premature clogging or failure of competitive screen designs.

Standard Screen Materials:

• 304 Stainless Steel
• 316L Stainless Steel
• Monel
• Other materials available upon request

Sequence Strainer:

Design and Construction:

The Fluid Engineering's Sequence Controller is designed with the Customers' specific requirements in mind. The Sequence Controller provides an automatic, effective backwashing cycle with a minimum loss of water. The Fluid Engineering Sequence Controllers are constructed with state-of-the-art industrial type components, which permits replacing individual components without having to replace an entire circuit board. The industrial type components are more durable and reliable and adjustments can be made with ease (Fig. 5).

Modes of Operation:

There are basically two modes of operation - intermittent and continuous. By turning the selector switch, the mode of operation can be selected.

Automatic Intermitent position:

With the selector switch in the "Auto" position, the drive motor will start and the backwash valve opens as determined by the adjustable cycle timer or by the differential pressure switch. The differential pressure switch is normally factory set at 1 - 1 1/2 psig over the anticipated clean pressure drop. Should a high differential pressure occur during the timed off period, the differential pressure switch will override the cycle timer and start or continue to backwash until the differential pressure is satisfied. After the differential pressure has been satisfied, the strainer will continue to backwash for an additional 60 seconds (time delay relay). The Fluid Engineering Automatic Self-Cleaning Strainer would start a backwash cycle based on the timed sequence selected on the adjustable cycle timer. The timed sequence should be determined by each installation and the conditions experienced. The adjustable cycle timer can be programmed from 15 minutes to a 10-hour cycle (off) and for 1 to 10 minutes duration (on). Adjustments can be made as conditions warrant them. The default factory settings for timers are 20-30 minutes OFF and 2-3 minutes ON.

Continuous Operation:

The selector switch is adjusted to "Manual" thus permitting the continuous mode. In the continuous mode, the Fluid Engineering Automatic Self-Cleaning Strainer will be backwashing continuously with the backwash valve open and the drive motor running. This mode of operation may be necessary if the installation experiences high solid loadings. In either mode of operation, the backwash assembly is specifically designed to rotate at 2 RPM to allow for effective backwashing in less time, thus decreasing the amount of backwash water lost.

Control Package:

• Control Panel with Nema 4 Enclosure
• Backwash Valve with Electric Operator
• Dual Element Differential Pressure Switch

Standard Features:

• Enclosure - Nema 4
• Adjustable Cycle Timer
• Off-Delay Timer
• Motor Starters with Auxiliary contact and overload relay
• Selector Switch
• Indicating Lights
• Fuses
• Terminal Block

• 110 V, 230 V, 380 V, 460 V, 575 V
• 50 or 60 hertz
• Nema 4X (fiberglass or stainless steel), Nema 7 or 9 (explosion proof), Nema 12, Nema 3 enclosures
• Circuit breakers, disconnect switch, transformer
• Reset buttons
• Alarms
• PLC interface and/or pump interlock
• Extra contact and relays

Customization:

Fluid Engineering offers flexible configuration for the Model 774 Automatic Skid Package. Various arrangements can be configured with Fluid Engineering´s full line of patented automatic strainers.

Proven Engineering:

Fluid Engineering (FE), a division of TM Industrial Supply, Inc., is an employee-owned engineering and manufacturing company that holds an ASME Section VIII, Division 1, Code "U" Stamp. FE develops and manufactures products for hundreds of commercial, industrial, and various other applications. FE holds numerous patents pertaining to the filtration of liquid and gas technologies.