Nordson-EFD-725D-725DA-Tech-Support-Guide.pdf - 第4页

10 11 10. Place one 8" adjustable wrench on the air cylinder ﬂats and the other 8" adjustable wrench on the c ylinder cap ﬂats, and loosen the cylinder cap . 11. Remove the c ylinder cap, piston and spring from…

5. Holding the rod, use one of the 8"

adjustable wrenches to loosen the ﬂuid

body.

6. Remove the ﬂuid body from the air

cylinder.

NOTE

At this point, the fluid end of the valve

can be thoroughly cleaned without further

disassembly.

For diaphragm replacement or complete

valve rebuild, proceed to Step 7.

7. Insert the 1/8" hex wrench through the

air inlet ﬁtting, loosen the shaft locking

screw, and turn it out two full turns.

8. Using the 3/8" open-end wrench, loosen

the shaft.

9. Remove the shaft and diaphragm.

725D / 725DA Dispense Valve | Tech Support Guide

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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.

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).

725D / 725DA Dispense Valve | Tech Support Guide

5www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.