DAV TECH DA 400 Product manual

DISPENSING VALVE DA 400
DAV TECH SRL
Via Ravizza, 30 - 36075 Montecchio Maggiore (VI) - ITALY
Tel. [phone] - Fax [phone]
[email protected] - www.davtech.it
Installation and
maintenance guide

Installation and maintenance guide
Index
1 INTRODUCTION pag. 3
1.1 The manual
1.2 Warranty
1.3 Goods receiving
2 TECHNICAL DESCRIPTION pag. 3
2.1 Valve operation
2.2 Technical specifications
2.3 Connection diagram
3 INSTALLATION pag. 4
3.1 Mounting on the machine
3.2 Drive the valve
3.3 Fluid connection
3.4 Setting of the valve
3.5 Setting of the material quantity
4 MAINTENANCE pag. 6
4.1 General rules
4.2 Valve Disassembly
4.3 Valve Re-assembly
5 TROUBLESHOOTING pag. 6
5.1 Problems and solutions
6 BREAKDOWN AND DIMENSIONS pag. 7
6.1 Breakdown DA 400
6.2 Components
6.3 Overall dimensions DA 400

DISPENSING VALVE DA 400
pag.3
1 INTRODUCTION
1.1 The manual
The user guide is the document that accompanies the valve from the time of its construction and throughout the period of
use, it is therefore an integral part of the valve. It requires reading the manual before taking any action involving the valve. The
manual must be readily available for use by staff and maintenance of the valve. The user and the attendant use are required
to know the contents of this manual.
Reproduction of any part of this manual, in any form, without the express written permission of DAV Tech. The text and
illustrations in this manual are not binding, the DAV tech reserves the right, at any time and without notice, the right to make
any changes to improve the product or for reasons of character manufacturing or commercial.
1.2 Warranty
The warranty is valid for a period of 12 months from the date of commissioning and no later than 15 months from the
date delivery. The interventions carried out during the warranty period does not extend in any way the validity period of the
guarantee. The seller is not liable for defects caused by normal wear of parts which by their nature are subject to wear.
1.3 Goods receiving
The original configuration of the valve must never be changed.
Upon receipt of the goods, check that:
• The packaging is intact
• The exact correspondence of the material ordered.
2 TECHNICAL DESCRIPTION
2.1 Valve Operation
The dispensing valve DA 400 is a pneumatic control component designed for precision dispense fluids low, medium or high
viscosity. Its been at rest is normally closed (even in case of power failure pneumatic), being present inside a safety spring.
The pneumatic supply, at a pressure equal to or greater than 6 bar in its lower input (see diagram connection) will result in the
withdrawal of the needle and the internal fluid flow.
The fluid flow can be modulated, as well as with the pressure to which is supplied, also by adjusting the opening of the needle
through the adjustment on the top of the valve DA 400.
2.2 Technical Specification
Model DA 400
Driving Simple or double effect
Weight 260 g
Fluid pressure Max 80 bar (double effect drive)
Driving air pressure 5 - 7 bar
Air inlet treading M5
Fluid inlet treading 1/8 gas
Fluid outlet treading Nozzle gas treaded, nozzle with bush, luer lock needles holder, stainless steel nozzles in various shape and dimensions
Cycle speed Until a 200 cycles/min
Passage setting Micrometric or with screw
Used material Stainless steel, Widia, nickel and Teflon coated brass
Operating fluids Silicone, liquid gaskets, greases, resin, oils and various low to high viscosity fluids

We reserve the right to modify at any time, without notice, the specifications, dimensions and weights in this datasheet. The illustrations are not binding.
NOZZLES FOR DA 400 DISPENSING VALVE
The valve DA 400 presents a very high number of nozzles available as
standard. Nozzles with thread 1/8 BSP male, luer lock, nozzles complete
with various shapes and diameters from 0.3 to 1.5 mm. If necessary, we
can design and create multi-point terminals, with radial outlets, inclined etc.
DRIVE THE VALVE DA 400
The valve DA 400 have to be drived by solenoid 5/2 or 3/2 (depending on whether you want to work double-acting
or simple acting) for a time setted by the PLC of the customer. We are available for the supply of timing systems
such as the DA 1000 T controller or even with the creation of electrical control panels to manage the various I / O
you need to check.
Connection diagram
• 0.3
• 0.5
• 0.8
• 1
• 1.5
LV
18SY MG
• 0.3
• 0.5
• 0.8
• 1
• 1.5
KV
• 0.3
• 0.5
• 0.8
• 1
• 1.5
KL
Valve configurations DA 400_ _ _ _
Ø Ø Ø
NOZZLES AVAILABLE
REGULATION
screw micrometric
RMNR
S.V. 5/2
ALSO POSSIBLE
SIMPLE
ACTING
PNEUMATIC PUMP
PLC
PRESSURE
STABILIZATOR
Special versions available on request.
mm mm mm
2.3 Connection diagram
3 INSTALLATION
3.1 Mounting on the machine
The valve 400 can be mounted using the through holes present on its body. Download 3D models of the valve from our
web-site to design brackets, fasteners, and check the dimensions.
3.2 Drive the valve
The valve 400 can be used as a single-acting valve, air for opening and closing with the spring; or as a double-effect
valve, air for opening and closing. The valve 400 must be connected to a solenoid valve 3/2 for the opening or to a
solenoid valve 5/2 for opening and closing. The minimum operating pressure must be at least 6 bar.
Air inlet
Installation and maintenance guide

DISPENSING VALVE DA 400
pag.5
3.3 Fluid connection
The valve must be connected to a power supply unit (tank, pump or other). A hose must be connected to the connector
in the lower part of the valve. If you work at pressures above 8 bar use fittings and pipes for high pressure .
3.4 Setting of the valve
The adjustment of the stroke of the plunger determines together with the pressure of
the material and the opening time of the amount of fluid dispensed.
> Micrometric version:
To adjust the stroke to act on the adjustment knob on the upper part of the valve.
Rotate clockwise to decrease the travel of the needle and consequently, the amount
is fluid. Turn clockwise coming all the way the valve will be fully closed, so it will
dispense fluid.
Rotate counterclockwise to increase the stroke of the plunger and therefore the
amount of fluid.
3.5 Setting of the material quantity
The adjustment of the quantity of material is determined by:
> The nozzle diameter (0.3 - 0.5 - 0.8 - 1.0 - 1.5)
> The pressure of the fluid
> Adjusting the stroke of the needle
Acting on these factors one can adjust the amount of desired material.
Do not tighten too much so decided to adjust the needle to avoid damaging the nozzle and needle.
Login material
Adjustment knob

4 MAINTENANCE
4.1 Genaral rules
The valves DA 400, due to construction methods and materials used, are easy to
maintain. Minimal maintenance, simple, accurate and allow a continuous operation
lasting over time and adjust 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) Loosen the adjustment lock with a key 13. Be careful because the spring is pushed
(see Fig. 1)
4) Unscrew the nozzle with a 9 or a 10-key (see Fig. 2)
5) Remove the spring
6) Needle nose pliers, pull the needle narrow (see Fig. 3)
7) Remove the protective plastic sleeve with a screwdriver and unscrew and remove
the sleeve from the valve body. (see Fig. 4)
4.3 Valve Re-assembly
After it has been cleaned thoroughly and have replaced all the damaged parts
(especially the seals and scraper mounted below the compass). Reassemble in the
reverse order of disassembly with little lubrication of the parts and the seals with
grease.
PROBLEM POSSIBLE CAUSE SOLUTION
Nothing or little fluid Valve does not receive the command Check the control (solenoid) of valve. Perform
a manual test.
The pressure of the fluid is too low
or absent.
Check the pressure of the power supply fluid
and possibly increase it.
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 is not sufficient Verify the actuation pressure (6 bar)
Residual fluid in the system to clean Remove any solid particles
Flow of fluid compass Moulded gasket damaged Replace the molded seal
The nozzle drips also
if the valve is not pilot Presence of dirt in the nozzle Clean or replace nozzle
The valve opens late Pressure drive is not enough Check the operating pressure (6 bar)
O-ring on the piston damaged Replace O-ring on the piston pneumatic
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.
fig. 1
fig. 2
fig. 3
fig. 4
Installation and maintenance guide

DISPENSING VALVE DA 400
pag.7
6 BREAKDOWN AND DIMENSIONE
6.1 Valve Breakdown
6.2 Components
26
11
18
12 3
4
9
12
16
17
18
19
20
21
22
23
24
25
26 27 28
29 30
13b
13a
14
15
11
10
5
67
7
8
POS CODE DESCRIPTION
132500002 Complete screw regulation
232500007 Complete micrometric regulation
3 63700051 Nut screw regulation
4 32500003 Body screw regulation
5 92010202 O-ring
6 32500004 Screw regulation block
7 92011002 O-ring
8 32500008 Adjustment knob
micrometer
9 32500009 Micrometric adjustment block
10 32500006 Regulation Seeger
11 93510903
Hard spring
93510901 Soft spring
12 92010701 O-ring
13a 84230103 Needle KV for nozzle 23/25/27/28/29/30
13b 84230203 Needle LV for nozzle 26
14 92010202 O-ring
15 92010601 O-ring
16 83100104 Bushing
17 92010401 O-ring
18 92320301 Special gasket
19 95120402 Straight air connector
20 95121502 90 ° air connector
21 31000001 Plastic cover
22 33100001 Valve body
23 85800101 Nozzle MG
24 85800102 Ghiera ugello MG
25 85100150 Nozzle Syrin
26 853100XX Nozzle LV
27 855100XX Nozzle KV
Replace the desired nozzle diameter to the value XX
Nozzle diameters available from 0.3 to 1.5 mm
28 855101XX Nozzle KL 7 mm
29 855102XX Nozzle KL 10 mm
Replace the desired nozzle diameter to the value XX
Nozzle diameters available from 0.5 to 1.5 mm
30 85100180 Nozzle 1/8”
92911700 Seals Kit

6.3 Dimensions DA 400
The sizes can change depending on the type of nozzle and flow control selection.
Download 3D models from our web-site.
The size may vary depending on the nozzle used.
We reserve the right to modify at any time, without notice, the specifications, dimensions and weights in this manual.
The illustrations are not binding.
DAV TECH SRL Via Ravizza, 30 - 36075 Montecchio Maggiore (VI) - ITALY - Tel. [phone] - Fax [phone]
[email protected] - www.davtech.it