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PAGE # 6
PF-50 Series Filter (ver. 4/5/05)
PIPING INTERFACE CONNECTIONS
The filter piping should be installed as follows:
1. Installation of interconnecting piping
• When mating interconnecting fittings to the filter unit make sure that filter components are
securely held in place so no damage or leaks occur.
• If welding or soldering mating flanges or fittings make sure not to overheat filter components.
Over heating filter components can cause damage or leaks.
• If welding DO NOT use the filter or its components as a ground.
2. Refer to Table ll (page 7) for piping connection sizes.
3. Run an influent line from the system or sump to the filter connection labled “INLET”. If a pump or
pre-strainer is provided connect the influent line to the flange labeled "INLET". Refer to specification drawings.
4. Run an effluent line from the filter return labeled "OUTLET" back to the system or sump. A service valve
and union should be installed in this line near the filter. Refer to specification drawings.
5. Run a waste line from the filter waste outlet labeled "WASTE" to the nearest sewer drain. Table III (page7)
lists the minimum and maximum backwash flow rates and volumes for the PF-50 series. Refer to
specification drawings.
6. For filters utilizing a source other than the process system water for backwash supply, Table Ill shows
the required backwash flow and volumes. The maximum backwash supply pressure for the PF-50 filter is
50 psi. Run a line to the connection labeled "BACKWASH." If public or municipal water is used for backwash,
a backflow preventer is required in this line on all units.
NOTE: Do not put any type of valve in the waste line!
The sewer drain must be large enough
to handle and maintain the flow of the backwash cycle. If the drain is not large enough to support the
volume of waste generated during a backwash cycle, it may be necessary to use a reservoir tank to
collect the waste water. The flow from the reservoir tank can then be regulated to the drain.
NOTE:
If the filter inlet connection is located above the process liquid operating level, a foot or check
valve must be installed below the water level to prevent loss of pump prime. A service valve and
union should be installed in this line near the filter.
NOTE: Do Not
reduce the pipe sizes listed, the pipe sizes are minimums. If long runs, excess fittings,
or lifts are necessary, it is recommended to enlarge the pipe diameter in order to reduce friction loss.
Never reduce the waste line; this can restrict the flow of the backwash cycle and reduce efficiency.
NOTE:
It is important that all piping and components associated with the filter system installation
must be supported to eliminate stress on the filter and piping.
NOTE:
Never overtighten service unions. Service unions should be hand tightened only. Over-tightening
can cause damage, which may result in leaks.
NOTE:
Always follow local, county, state or other government authority’s requirements for piping hook-ups.
