UGSI Encore 700, Руководство по эксплуатации и обслуживанию

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CF.440.400.001.IM.0417
ENCORE
®
700 METERING PUMP
40
4.4.5 Valve and Diaphragm Replacement
NOTE: The 1-3/8", 2", 3", and 4"diaphragms utilize a circular back-up
ring screwed on the diaphragm insert. When replacing the diaphragm,
unscrew the back-up ring for reuse. A PTFE disc is inserted between the
diaphragm and the back-up ring. A new PTFE disc must be used every time
a new diaphragm is installed. For specifi c part numbers on the diaphragm,
back-up ring, and PTFE disc, refer to the Spare Parts List in Section 6.
All O-rings must be lightly lubricated with silicone grease before assembly.
The assembly procedure for the cartridge valves is the reverse of the disassembly
procedures described in paragraph 4.4.3. Refer to Table 4.2 under head size for
the corresponding torque to tighten the clamping bolts for the cartridge valves.
Refer to Dwg. 440.050.001.030 for the 1-3/8" Diaphragm and Dwg.
440.050.001.040 for the 2" Diaphragm. Use the 2" Diaphragm drawing as
reference for all other sizes.
a. After the removal of the diaphragm assembly, as described in
paragraph 4.4.4, the bellow clamp (4) can be removed. On the 1-3/8"
Diaphragm, the bellow clamp (3) is secured by a nut (4). The diaphragm
spacer (5), if used, can also be removed.
b. Remove four screws (3) and slide out the adapter (1). On 1-3/8"
Diaphragm, four long head bolts secure the adapter (1). Watch for the
O-ring between the adapter and the gearbox.
c. Pry off the old bellow seal (2) from the adapter and scrape the old sealant
from around the counterbore.
d. Clean the adapter thoroughly of oil with appropriate solvent, especially the
counterbore where the bellow seal will be glued.
e. Apply a 1/16" bead of RTV sealant along the corner of the counterbore.
f. Install the new bellow seal carefully and avoid smearing any RTV on the
folded surface of the bellow seal. Wipe off any excess RTV inside and
outside of the bellow seal.
g. Set aside, face up, and let the RTV sealant cure for a minimum of three hours
before continuing the assembly. Recommended time for RTV sealant to
cure before fi lling the gearbox with oil is 12 hours.
NOTE: Adapters with bellow seals already glued in place and ready for
assembly to the pump are available. See Table 6.2 (in Section 6) for kit
number.