Figure 2 - The innovative internals of the Spyder-Clean showing ease of maintenance. Proven Features Include A unique patented spray assisted/mechanical backwash mechanism for extended service life. A clog-resistant straining element (wedge-wire configuration) to reduce maintenance downtime and operator assisted attention. All internal replacement parts supplied in corrosion resistant materials (special material available on request). An efficient, effective cleaning mechanism which reduces annual maintenance, requiring fewer parts. A low rpm backwash cycle provides more efficient cleaning, less wear (no contact between rotating parts) and longer duty cycle on motors and speed reducers. Any existing Web (6" and up) can be converted to Spyder-Clean.

The Spyder-Clean
The Spyder-Clean is a line of Motorized, Automatic Self-Cleaning Strainers. On fluid piping systems, which demand added cleaning abilities due to application requirements, the Spyder-Clean provides continuous uninterrupted debris removal. It is very effective in system applications where operating pressure is low (under 5 psig) or where the debris is difficult to remove. The Model SFA31 Strainer provides unattended service with the addition of external backwash to enhance the self-cleaning attribute over other automatic strainers.

Application:
The Spyder-Clean's unique backwash system permits installation in a broader range of applications. This range includes from relatively low pressure to very high pressure and from coarse, easily removed debris to fine, sticky debris.

In a low pressure mode (such as on the suction side of a pumping system), the Spyder-Clean system is mounted on the leading edge of the strainer backwash arm. External fluid is directed at an incident angle over the inside surface of the straining element through the high pressure nozzle assembly. The high velocity of this spray assists the cleaning of the wedge-wire straining element. External source backwash pressure must be a minimum of 30 psi over operating pressure.

Spyder-Clean Strainers are used to protect equipment such as pumps, motors, heat exchangers or spray nozzles, as well as process applications such as cooling towers or virtually any similar application.

The Model SFA31 Spyder-Clean Self-Cleaning Strainers are fabricated in pipe sizes ranging from 1" to 36" to suit most applications' requirements. The Spyder-Clean System can also easily and economically be field installed in any Sure Flow Equipment Self-Cleaning Strainer (6" size and larger) in service as a retrofit installation.

Cross-Sectional View of Port/Straining Element During Backwash Cycle

The Unique Spyder-Clean Advantage
The external source of backwash fluid is introduced by opening the control valve (not shown) connecting the spray nozzles (A) at the leading edge (B) of the backwash assembly.

A "Jet" spray action occurs at the straining element inside surface (see insert) in addition to the flow reversal at the port/straining element interface.

Debris is effectively removed from the full-length of the straining element by a vigorous "Spyder-Clean" fluid flow into the hollow port; down the hollow drive shaft and out the backwash outlet.