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3.3 Adjusting the amount of material
The amount of product is dispensable functional to fill volume of the room, set by turning the adjustment, mounted
on valve head displacement.
A grain then allows you to lock the adjustment and prevent tampering.
3.4 Quantity dispensable
Being valves volumetric quantity is dispensable only functional to the volume of the chamber set.
In any case it is necessary consider the minimum time required for charging and discharging of the valve, the times
that vary with the pressure of the incoming fluid, its viscosity, and depending on the type of applicator connected
to the nozzle valve.
DISPENSING VALVE WITH HAND-GRIP DAV 300 MAN - DAV 400 MAN
4 MAINTENANCE
4.1 General rules
Le valvole DAV 300 MAN e DAV 400 MAN, thanks to construction methods and materials used are easy to
maintain. Minimal maintenance , simple, accurate and allow a steady long-term operation and regular time of the
valve, maintaining unchanged performance.
4.2 Valve disassembly
Before disassembling the valve:
1) Clean the outside
2) Release the pressure from the system
3) Disconnect the power supply of lubricant to the valve
4) Key 4mm remove the 4 tie rods present in the head and foot valve
5) Remove various aluminum bodies
6) Remove the needle and the volumetric chamber
7) If necessary, unscrew the air piston needle from the spool.
4.3 Valve reassembly
After it has been cleaned thoroughly and have replaced all the damaged parts (especially the seals,scrapers etc.),
reassemble in reverse order of disassembly little lubrication parts and seals with grease fittings.
Be careful not to overdo the tightening of the 4 tie rods, to avoid damage.
5 TROUBLESHOOTING
5.1 Problems and solutions
The search for defects in the operation should be performed only by personnel qualified respecting the safety rules in force.
PROBLEM
POSSIBLE CAUSE
SOLUTION
The lubricant does not
come out
The valve does not receive the command
Check the control (solenoid) of valve. Perform
a manual test.
The pressure of the grease is too low or
absent.
Check the pressure of the power supply fluid
and possibly increase in range 20/200 bar
The nozzle is clogged
Remove and clean the nozzle.
The filter is dirty (if any)
Clean or replace the filter.
A tube is bent
Check the fluid supply pipe
Actuating pressure tire
Ensure sufficient pressure to drive (5-7 bar)
The lubricant has a viscosity too high
The valves can DAV 100 and DAV 200
dispense lubricant viscosity max. 1,000,000 m
Pa s and NLGI 3
Lubricant leakage retired Molded seals or gaskets
Replace the damaged needle or needle shaped
