Dover Wilden Original A8, Инженерия, эксплуатация и обслуживание

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WILDEN PUMP & ENGINEERING, LLC WIL-10270-E-02
SECTION 8C
REASSEMBLY HINTS & TIPS
ASSEMBLY:
Upon performing applicable maintenance to the air distribu-
tion system, the pump can now be reassembled. Please
refer to the disassembly instructions for photos and parts
placement. To reassemble the pump, follow the disassem-
bly instructions in reverse order. The air distribution system
needs to be assembled first, then the diaphragms and finally
the wetted path. Please find the applicable torque speci-
fications on this page. The following tips will assist in the
assembly process.
• Clean the inside of the center section shaft bushing to
ensure no damage is done to new seals.
• Stainless bolts should be lubed to reduce the possibility of
seizing during tightening.
• Ensure proper alignment on the sealing surfaces of intake
and discharge manifolds.
• Liquid chambers are easier to attach when the diaphragm
is inverted. Prior to attaching the second water chamber,
push diaphragm assembly so that it is as close as possi-
ble to the center section.
• PVDF and PFA pumps require PTFE gasket kits for
improved sealing. Gasket kits may be installed on other
pumps where sealing is an issue.
• When assembling PTFE-coated hardware, care should
be taken to keep the coating intact.
• When installing Glyd™ rings, the use of the Wilden Ringer
tool simplifies seal installation.
The Wilden T4 cast iron pumps require PTFE gasket tape on
the liquid chambers (P/N 04-9502-99). Other pump types may
use PTFE gasket kits for additional sealing characteristics.
During reassembly follow the procedures listed in your pump’s
Engineering, Operation and Maintenance manual. Carefully
prepare sealing surfaces by removing all debris and foreign
matter from diaphragm bead and all mating surfaces. If neces-
sary, smooth or deburr all sealing surfaces. Mating surfaces
must be properly aligned in order to ensure positive sealing
characteristics.
Always wear safety glasses when performing maintenance on
any Wilden product.
SECTION 8D
GASKET KIT INSTALLATION
Step 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
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
adhesive holds in place during assembly.
Do not stretch the tape during placement
in the center of diaphragm bead groove.
Step 3
The end of the tape should overlap
approximately 13 mm (1/2"). Proceed to
install the PTFE tape on the remaining
diaphragm.
MAXIMUM TORQUE SPECIFICATIONS
Description of Part Metal Pumps
Air Valve 9.6 N•m (85 in-lbs)
Outer Piston (PTFE-fi tted) 108.5 N•m (80 ft-lbs)
Outer Piston (Rubber-fi tted) 108.5 N•m (80 ft-lbs)
Small Clamp Band (PTFE-fi tted)) 6.6 N•m (58 in-lbs)
Small Clamp Band (Rubber-fi tted)) 2.8 N•m (25 in-lbs)
Large Clamp Band (All) 47.4 N•m (35 ft-lbs)
Description of Part Metal Pumps
Center Block Assembly 31.1 N•m (23 ft-lbs)
Polyurethane Screen Base 2.3 N•m (20 in-lbs)
Metal Screen Base 9.0 N•m (80 in-lbs)
Inlet Cover 9.0 N•m (80 in-lbs)
Stallion Handle 20.4 N•m (15 ft-lbs)