Nordson-EFD-725D-725DA-Tech-Support-Guide.pdf - 第5页
2. Using the lubricant supplied in the repair kit, apply a film of lubricant to the points indicated. 3. Assemble the air cylinder cap , piston and spring. 4. Install the air cylinder cap , piston and spring by pushing to…
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10. Place one 8" adjustable wrench on
the air cylinder flats and the other 8"
adjustable wrench on the cylinder cap
flats, and loosen the cylinder cap.
11. Remove the cylinder cap, piston and
spring from the air cylinder.
The valve is now completely
disassembled, and is ready for cleaning,
inspection and reassembly.
CAUTION
The adjustable air cylinder on the 725DA valve
is not serviceable in the field. Do not attempt
further disassembly. Do not turn the stroke
adjustment collar.
For best results, install all replacement parts included in the repair kit.
Valve Maintenance and Reassembly
1. Clean and inspect all parts
• Clean all parts with a solvent that is
compatible with the fluid being dispensed.
• Inspect all threads.
• Inspect piston pins for straightness.
• Inspect fluid body seat area for pitting.
• Replace all worn or damaged parts.
• Complete parts lists appear on the last page
of these instructions.
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725D / 725DA Dispense Valve | Tech Support Guide
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2. Using the lubricant supplied in the repair
kit, apply a film of lubricant to the points
indicated.
3. Assemble the air cylinder cap, piston
and spring.
4. Install the air cylinder cap, piston and
spring by pushing to compress the
spring while turning to engage the
threads.
5. Using the two 8" adjustable wrenches,
tighten the air cylinder cap. If a torque
wrench is available, torque to 10.8 Nm
(8 ft lbs).
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725D / 725DA Dispense Valve | Tech Support Guide
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6. Install the shaft and diaphragm.
• The convex ring of the diaphragm should
face away from the air cylinder.
7. Using the 3/8" open-end wrench, tighten
the shaft. If a torque wrench is available,
torque to 1.69 Nm (15 in lbs).
8. Insert the 1/8" hex wrench through the
air inlet fitting and tighten the shaft
locking screw. If a torque wrench is
available, torque to 2.82 Nm (25 in lbs).
9. Install the fluid body and tighten using
the 1/8 NPT rod and 8" adjustable
wrench. If a torque wrench is available,
torque to 6.78 Nm (5 ft lbs).
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725D / 725DA Dispense Valve | Tech Support Guide
6 www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.