Nordson-EFD-MC800-Operating-Manual.pdf - 第26页
MicroCoat MC800 Lubrication Systems 26 www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide. Part Numbers For all system part numbers, refer t…
MicroCoat MC800 Lubrication Systems
25www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.
Spray Valve Maintenance
Before performing any maintenance, set the System Pressure Switch to the Off position and depressurize the tank
reservoir by lifting the lever on the tank pressure relief valve.
WARNING
When using filtered plant air and clean lubricants, the MC785M Series spray valves are designed for long-term
performance without scheduled maintenance.
If lubricant flow stops or becomes erratic, first review “Troubleshooting” on page 30. Cleaning the nozzle will
solve most problems related to lubricant flow and spray patterns.
To Clean the Nozzle
Remove the air cap retainer nut, air cap and nozzle from the outlet end of the valve. Clean and reinstall.
Valve Disassembly
NOTE: Refer to the diagram on page 27.
1. Remove air cap retainer nut, air cap and nozzle from the outlet end
of valve.
2. Remove diaphragm chamber cap, diaphragm return spring and
needle / diaphragm assembly from the valve body.
3. Remove diaphragm retaining nut and spring locating washer from
the needle, then remove and discard old diaphragm.
NOTE: Install a new diaphragm (P/N 7021727) each time the valve
is reassembled.
4. Clean all parts in mineral spirits.
Valve Reassembly
NOTE: Refer to the diagram on page 27.
1. Place the new diaphragm over the threaded end of the needle. The black Viton side of the diaphragm should
face the threaded end. The blue-gray PTFE side should face the wetted side of the valve.
2. Place the spring locating washer over threaded end of the needle. The stepped side should face the threaded
end.
3. Install a new diaphragm retaining nut (included with P/N 7021727 diaphragm) and turn it until the nut starts
to feel tight and the diaphragm cannot be rotated on the needle with fingers. Avoid crushing the diaphragm
causing it to bulge away from the washer.
4. Install the needle / diaphragm assembly into the valve body, then install diaphragm return spring and diaphragm
chamber cap, and tighten firmly.
5. Reinstall the nozzle, air cap and air cap retainer.
The air cap retainer nut should be tightened with a wrench to prevent loosening due to press vibration.
Maintenance Tools
8" adjustable wrench
7/8" open end wrench
5/16" box end wrench
1/4" nut driver
MicroCoat MC800 Lubrication Systems
26 www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.
Part Numbers
For all system part numbers, refer to the MicroCoat Lubrication System Parts & Accessories List:
www.nordsonefd.com/MC800PartsAccessories
Accessories
For all available accessories, refer to the MicroCoat Lubrication System Parts & Accessories List:
www.nordsonefd.com/MC800PartsAccessories
MicroCoat MC800 Lubrication Systems
27www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.
Replacement Parts
MC785M Series Spray Valves
HM 6 X 25 mm
Hex head bolt, SS
Push-in elbow
10-32 x 4 mm OD
P/N 7007019
Hex head bolt SS —
brass tipped
MC785M: Standard fan air cap 0.046" P/N 7021775
MC785M-WF: Wide fan air cap 0.046" P/N 7021778
Tubing for MC785M:
P/N 7008007 4 mm — black
P/N 7022171 4 mm — clear
P/N 7008006 4 mm — white
Air cap retainer nut
P/N 7021599
Needle
P/N 7021702
Spring locating washer
P/N 7021704
Diaphragm return spring
P/N 7021700
Diaphragm chamber cap
P/N 7021698
Push-in elbow
10-32 x 4 mm OD
P/N 7007019
Optional: Straight push-in fitting
10-32 x 4 mm OD
P/N 7021724
Fluid body
P/N 7021696
Push-in fitting
1/8 NPT x 4 mm OD
P/N 7021718
Optional: Push-in elbow fitting
1/8 NPT x 4 mm OD
P/N 7021738
Viton O-ring
P/N 7014765
Nozzle 0.046"
P/N 7021753
Diaphragm retaining nut
P/N 7021709
Diaphragm
P/N 7021727
PTFE side
(blue-gray)
Mounting clamp
P/N 7021742