a3369b.pdf - 第48页

Micro disp en sing Va lve VTK - TR -BA- 171e - 1 - User Manua l MDS 3080 -V 39 5.4 Special Features of the Valve Normally Close d In it s not en ergized st ate, i.e. in ab sence of voltag e, th e valve remai ns in closed…

Microdispensing Valve

VTK-TR-BA-171e-1 - User Manual MDS 3080-V

5.3 Technical Data

Parameter Value

Dispensable Quantity

Minimum 3 nl per cycle

Inlet Pressure Range

Depending on the supply unit

(e.g. cartridge or pressure tank)

Dynamic Viscosity of Fluids

Low to medium viscosity up to 8000 mPas

Response Time (PLC-interface)

ca. 96 µs

Dispensing Frequency (max.)

< 2 kHz

Dispensing Frequency (average)

450 Hz

Compatibility

all aqueous fluids, organic solvents, weak acids and

bases

Dimensions (basic model)

103 mm x 44 mm x 15 mm

Weight

ca. 260 g (depending on configuration)

Position of Tappet in Absence of Voltage

closed

Microdispensing Valve

VTK-TR-BA-171e-1 - User Manual MDS 3080-V

5.4 Special Features of the Valve

Normally Closed

In its not energized state, i.e. in absence of voltage, the valve remains in closed position, so that

the channel of the nozzle insert is blocked by the tappet tip. The liquid in such a situation

therefore cannot flow.

With Bayonet Fluid Box

Thanks to the bayonet system, you can remove the fluid box easily from the valve. There are no

screws. This allows for a very quick exchange of nozzle fixation nut and nozzle insert or of the

tappet for cleaning or maintenance purposes. Afterwards you have to carry out the adjust, in

order to establish a convenient position of the nozzle insert with respect to the tappet. This way a

reproducible process remains ensured.

Highest Flexibility

Due to the modular design of the series, nozzle units and fluid boxes can be exchanged easily.

This allows at any time for a quick adaption of the system configuration to new applications. A

comprehensive choice of accessories is also available for special circumstances.

These modifications can be performed in no time, avoiding downtimes for the process.

Functionality Independent of the Position

The functionality of the valves does not depend on the fitting position, considerably simplifying

the integration into an existing process.

User-friendly Design

The control unit does not give rise to compatibility problems with respect to the other

components of a complex process structure. Service is possible by keypad or, thanks to the

integrated RS-232C, by remote PC.

Secure Wiring

The valves are equipped with high-quality Lemo connectors. Those can be connected and

disconnected easily, but hold secure against any accidental opening.

Comprehensive Material Selection

Only the best materials are used for the production of Vermes Microdispensing valves.

• All parts in contact with the transported medium consist of high-alloy special steel, rust- and

acid-resisting, or modifications of high-duty polymers of the PE (Polyethylene), PEEK

(Polyetheretherketone) and PTFE (Polytetrafluoroethylene) family.

• Sealings can be made of different materials. You can find notes regarding heat resistance and

chemical resistance in paragraph 9.2, page 130 and paragraph 9.3, page 131.

• For nozzle inserts, special steel, stainless steel and ceramics options are permanently in store,

allowing for perfect tailoring of the configuration to the needs of the particular application.

E.g. do we recommend using mounting bodies and tightening screws of stainless steel for

very low viscosity media.

Initial Operation

VTK-TR-BA-171e-1 - User Manual MDS 3080-V

6 Initial Operation

6.1 Delivery

VERMES systems are shipped in carefully packed state. Transport damages however can never be

totally excluded, and deadlines stated in insurance contracts should not be exceeded.

6.1.1 Unpacking

After receiving the merchandise:

– Check the package visually for any kind of damage.

If yes:

Detected damages must be notified to the carrier. As soon as the complaint has been confirmed

in writing, contact the responsible forwarder and inform VERMES Microdispensing.

If no damage is detected:

– Open the package.

– Remove any contained subcomponents and parts of the microdispensing system from the

package and check the delivery for completeness.

6.1.2 Content

According to the purchase order, the following components may be included; some of them are

already preassembled:

1 Control unit MDC

2 MicroDispensing Valve MDV

3 Fluid box*

4 Nozzle unit*

5 Nozzle insert*

6 MDT 303 - Nozzle Insert

Changing Tool

7 Tappet guard

8 MDT 327 – Multi-Function Tool

9 Mains cable (black)

10 MDT 323 - Nozzle Insert –

Squeezing Out Tool TA

11 Actuator cable (red)*

12 Sensor cable (yellow)*

13 MDT 329 – L-Shape Hexagon Key

2 mm

*These parts are included only, if ordered explicitly.

Fig. 14: Content