Kenco Engineering Needle Replacement Kit User Manual
Kenco engineering company
KENCO ENGINEERING COMPANY
P.O. BOX 470426 TULSA, OK 74147-0426
PHONE: (918) 663-4406 FAX: (918) 663-4480
Web:
www.kenco-eng.com
e-mail:
MODEL KPFS LIQUID LEVEL FLOAT SWITCH
NEEDLE AND NEEDLE SEAT REPLACEMENT INSTRUCTIONS.
RK-NEEDLE-KPFS, NEEDLE AND NEEDLE SEAT KIT
Figure 1
To replace the Needle and Adjustable Needle Valve Seat:
1.)
Turn off the supply line pressure to the switch if system is pressurized.
2.)
Remove the Switch Enclosure Cover on the end of the Switch Body. The Switch Assembly will be visible as in Figure 1.
3.)
Using a 9/64” Allen wrench (not supplied) loosen, but do not remove the two #8 Screws. They should be loosened between
four and five turns from the fully seated position. This will allow the Switch Assembly to drop down but still stay attached to the
Switch Body. Note: If you have a KPFS-LF version then there will be a counter weight attached to the back of the
Switch Assembly that will prevent the Switch Assembly from being able to drop far enough to remove the Needle and
Adjustable Needle Valve Seat. In this case the Switch Assembly will need to be completely removed from the Switch
Body.
4.)
With the Switch Assembly dropped down, the Needle should fall out of the Needle Valve Seat. Discard the old Needle.
5.)
Remove the 0.050” “L” Shaped Hex Allen Wrench from inside the Switch Enclosure Cover.
6.)
Using the 0.050” “L” Shaped Hex Allen Wrench supplied with the switch, loosen the Set Screw. Important: Only loosen the
Hex Socket Head Set Screw 1 to 1-1/2 turns
7.)
The 0.050” “L” Shaped Hex Allen Wrench is used to screw the Adjustable Needle Valve Seat in and out. Since we are going
to remove the old Needle Valve Seat in this step, we will be screwing it out. With the Set Screw loosened, insert the. 050” Allen
Wrench into the right most visible hole in the Needle Valve Seat and move the wrench to the left to unscrew the Needle Valve
Seat. Repeat this procedure until the Needle Valve Seat falls out of the Valve Base. Discard the old Needle Valve Seat.
8.)
Insert the new Needle Valve Seat into the Valve Base and screw it in until the threads have engaged and it is no longer
comfortable to screw in by hand.
9.)
Insert the .050” Allen Wrench into the left most visible hole in the Needle Valve Seat and move the Allen Wrench to the right to
screw the Needle Valve Seat in. Repeat this procedure until you have raised the Needle Valve Seat to the point that it has
bottomed out against the Valve Base. (Note: the Needle Valve Seat may seem a little tight at first. This is normal and is due
to the O-Ring seating. Once the O-Ring is fully seated, the Needle Valve Seat will get easier to turn).
10.) Using a 9/64” Allen wrench, tighten the two #8 screws that were loosened in step 3 to secure the Switch Assembly in place.
11.) With the Needle Valve Seat screwed all the way in and bottomed out against the Valve base, you are ready to adjust the
Needle and Needle Valve Seat for proper operation. See Valve set up instructions on the back of this document.
(64284 Rev A)
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