21
WILDEN PUMP & ENGINEERING, LLC
WIL-10220-E-02
Step 1.
Figure 1
Gently remove the adhesive covering
from the back of the PTFE tape. Ensure
that the adhesive strip remains attached
to the PTFE tape.
Step 2.
Figure 2
Starting at any point, place the PTFE
tape in the center of the diaphragm bead
groove on the liquid chamber and press
lightly on the tape to ensure that the adhe-
sive holds it in place during assembly. Do
not stretch the tape during placement in
center of diaphragm bead groove.
Step 3.
Figure 3
The ends of the tape should overlap
approximately 13 mm (1/2”). Proceed to
install the PTFE tape on the remaining
liquid chamber.
PTFE Gasket Kits (04-9501-99) are available for A4 and T4 plas-
tic pumps. Carefully prepare sealing surfaces by removing all
debris and foreign matter from diaphragm bead and all mating
surfaces. If necessary, smooth or deburr all sealing surfaces.
Mating surfaces must be properly aligned in order to ensure
positive sealing characteristics.
SECTION 8D
GASKET KIT INSTALLATION
Step 4.
Figure 4
Carefully remove the protective covering from the back of the
PTFE gasket attached to tape.
Step 5.
Figure 5
Install the valve ball, valve seat and o-ring.
Step 6.
Figure 6
Center the gasket so that it evenly covers the o-ring and seat
areas.
Step 7.
Figure 7
Gently apply pressure to gasket to ensure the adhesive
maintains a positive seal to stay in place during pump
assembly.
