Dover WILDEN A1 Series, Инженерия, эксплуатация и обслуживание, Страница: 14 / 28

WILDEN PUMP & ENGINEERING, LLC
12
WIL-10040-E-02
SECTION 8A
MODEL A1 PLASTIC
DIRECTIONS FOR DISASSEMBLY/REASSEMBLY
Figure 1
Step 2. Figure 2
Using the 3/16” Allen Wrench, remove air valve bolts. Inspect
air valve assembly for wear or damage.
(Figure 2)
Step 3. Figure 3
Utilizing the 7 ⁄
16
" box wrench, start by removing the four long
carriage bolts that hold the top and bottom manifolds to the
center section.
(Figure 3)
CAUTION: Before any maintenance or repair is attempted, the
compressed air line to the pump should be disconnected and
all air pressure allowed to bleed from the pump. Disconnect all
intake, discharge, and air lines. Drain the pump by turning it
upside down and allowing any fluid to flow into a suitable
container. Be aware of any hazardous effects of contact with
your process fluid.
The Wilden model A1 has a 12.7 mm (
1/2
") inlet and outlet. The
single-piece center section, consisting of center block and air
chambers, is molded of polypropylene. Its air distribution
system is based on time-proven designs, which offer econom-
ical reliability and performance. The model A1 Plastic is avail-
able in injection-molded polypropylene and PVDF.
TOOLS REQUIRED:
5 ⁄
16
" Wrench
3 ⁄
16
" Allen Wrench
3 ⁄
8
" Wrench
7 ⁄
16
" Wrench
Adjustable Wrench
Vise equipped with soft jaws (such as plywood, plastic
or other suitable material)
NOTE: The model used for these instructions incorporates
Teflon ® diaphragms, balls, and seats. Models with rubber
diaphragms, balls and seats are the same except where noted.
DISASSEMBLY:
Step 1.
Before starting disassembly, mark a line from each liquid cham-
ber to its corresponding air chamber. This line will assist in
proper alignment during reassembly.
(Figure 1)