Kenco Engineering Valve Replacement Kit User Manual

KENCO ENGINEERING COMPANY

P.O. BOX 470426 TULSA, OK 74147-0426

PHONE: [phone] FAX: [phone]

Web: www.kenco-eng.com e-mail: [e-mail]

MODEL KPFS LIQUID LEVEL FLOAT SWITCH

VALVE REPLACEMENT KIT INSTRUCTIONS

RK-VALVE-KPFS VALVE REPLACEMENT KIT

The RK-VALVE-KPFS is the Valve replacement kit for the Kenco pneumatic float switch model KPFS. The Valve is made up of
three main components. These components can be seen in the middle view of Figure 1 and consist of the Valve Base, Valve Body
and Valve Cap. There are two screws that hold the KPFS to the Switch Body. These two screws also serve as the screws that hold
the valve assembly together. Because of this, each of the three Valve components are assembled to the Switch Body one at a time
until all three components are in place, then the two screws are installed to clamp the Valve assembly together and secure it to the
Switch Body. To get started with the assembly, the old Valve must first be removed.

Figure 1

Refer to the illustrations in Figure 1 for the Valve removal process.

To remove the old Valve

1. Turn off the supply line pressure to the Valve if system is pressurized.

2. Disconnect the supply and outlet lines. Disconnect the exhaust line if equipped.

3. Remove the Switch Enclosure Cover.

4. Remove the two screws holding the Valve assembly in place and discard.

5. Remove the Valve Cap, Valve Body, Valve Base, all of the O-rings and discard.

6. The Needle will be loose and probably laying inside the Switch Enclosure. Locate the Needle and discard.

7. Make sure the valve mounting surface on the Switch Body is clean and free of any dirt or debris. The KPFS
is now ready to have the new Valve installed.

:

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(64285 Rev A)

Figure 2

Install Valve Base

1. Locate the parts bag that contains the Valve Base, Valve Base O-Rings and Needle. It will contain the following parts: Notice
that only one o-ring per (item #5) is needed but two are supplied. This is because it is a very small o-ring and if dropped may
be difficult to find.

ITEM NUMBER QUANTITY DESCRIPTION

1 1 NEEDLE
2 1 O-RING, ¾” DIAMETER
3 2 O-RING, ¼” DIAMETER
4 1 VALVE BASE
5 1 O-RING, 13/64” DIAMETER (SMALLEST O-RING, 1 EXTRA IS SUPPLIED)

NOT SHOWN 1

2. Insert the o-ring (item #2) into the large counter bore in the valve mounting surface on the Switch Body. It is the counter bore
directly under item #2 in Figure 2.

3. Lay one each of the two o-rings (item #3) on the valve mounting surface on the Switch Body. Line each of the o-rings up
with one each of the threaded holes on the valve mounting surface. (Alternate method: Apply grease to o-rings and place
them in the o-ring counter bores on the bottom of the Valve Base. The grease will hold the o-rings in place during assembly).

4. The object of the next few steps is to set the Valve Base down onto the valve mounting surface and over the top of the
Needle. In order to do this, the Needle must be positioned directly under the large hole in the valve mounting surface. This is
accomplished by gently

grasping the needle with a pair of clean hemostats (or needle nose pliers). Take care not to contact
the rubber tipped end. If the rubber tipped end gets damaged, the KPFS may leak and not operate properl y. While holding
onto the hemostats, insert the Needle into the Switch Enclosure with the rubber tip facing up. Position the Needle directly
under the hole in the valve mounting surface.

5. Noting the orientation of the Valve Base in Figure 1, carefully insert the Valve Base into the hole in the valve mounting
surface while at the same time gently guiding the Needle into the Needle Seat.

6. As you get close to setting the Valve Base down onto the valve mounting surface, make sure that the Valve Base is oriented
exactly as shown in figure 1 and that the o-rings (item #3) fully seat into the counter bores on the screw holes in the Valve
Base. As the Needle Seat is guided over the Needle, release the Needle and remove the hemostats. The Needle should be
captured between the Needle Seat and the Switch Arm.

7. With the Valve Base fully seated and properly oriented, place the o-ring (item #5) into the small counter bore on top of the
Valve Base as shown in figure 2.

.050” “L” SHAPED HEX ALLEN WRENCH (REPLACEMENT OF ALLEN

WRENCH SUPPLIED WITH KPFS IN CASE IT IS MISSING OR WORN OUT)

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