Vermes MDS 358X user Manual.pdf - 第55页

Initial Operation 44 VTK - TR -BA- 072e - 1 - User Manua l MDS 358X S eries 6 Initial O peration 6.1 Delivery VERMES sy stems are ship ped in ca refully pack ed state. Transport da mages however c an never b e tota lly e…

Microdispensing Valve

VTK-TR-BA-072e-1 - User Manual MDS 358X Series

5.5 Special Features of the Valve

Normally Open

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

the tappet tip does not block the channel of the nozzle insert. The liquid in such a situation

therefore may flow. In reality, this fact does not represent a problem, since for this model, usually

high-viscous media are processed which in worst case drain off very slowly.

It is recommended however, that users bear this fact in mind, and reduce the supply pressure to

atmospheric pressure during longer interruptions and before switching OFF the unit.

With Bayonet Fluid Box

Thanks to the bayonet system, the fluid box can be removed easily with just one click 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. Ordering

the equipment already at an early stage however is recommended; do not forget to specify the

relevant data (Valve ID etc.). Consult our Technical Support beforehand, if special parameters

have to be taken into consideration.

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 121 and paragraph 9.3, page 122.

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

store, allowing for perfect tailoring of the configuration to the needs of the particular

application.

Initial Operation

VTK-TR-BA-072e-1 - User Manual MDS 358X Series

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 visually, if any damages can be detected.

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 fixation nut*

5 Nozzle insert*

6 MDT 303 - Nozzle Insert

Changing Tool

7 MDT 329 - L-Shape hexagon Key

2 mm

8 MDT 327 – Multi-Function Tool

9 Tappet Grease TF 1 ml syringe

10 MDT 323 - Nozzle Insert –

Squeezing Out Tool TA

11 Actuator cable (red)*

12 Sensor cable (yellow)*

*These parts are included only, if ordered explicitly.

Fig. 20: Content

Initial Operation

VTK-TR-BA-072e-1 - User Manual MDS 358X Series

Options Recommended options

Different models of fluid boxes

Different fluid box connectors

Nozzle heating

Cleaning set

MDT 301 - Universal Tool

MDT 306 - Torque Wrench Tool

MDT 324 - Nozzle Insert Cleaning Holder

If the intended application needs particular accessories (e.g. seals made of special material),

consult our Technical Support at once (see Page 7). Do not start the system in incomplete state.

6.2 First Assembling of the Valve

This chapter describes how to ready your microdispensing system for the first dispensing session.

Always make sure all screw couplings sit tight (torque values in paragraph 3.3.11, page 19).

INFORMATION

Some parts preassembled

Some elements of the equipment are usually delivered in preassembled state. In those cases you

can omit the respective steps.

Proceed as follows:

Picture Explanation

Step 1 (fluid box body)

Information!

This step will be optional, if you re-assemble the valve

later, since usually you would not remove the

Connector BY from the mounting body.

Place the fluid box body on the receptacle of the

mounting body. Align the bore on the fluid box body

with the bore on the mounting body (see circles in

the first picture). The fluid box body will sit in the

mounting body.

Push the Connector BY through the mounting body

into the bore of the fluid box body. Screw the

Connector BY tight (clockwise) by using an MDT 327

(for newer revisions of the Connector BY you can also

use a hexagon key 2.5 or the MDT 306 - Torque

Wrench Tool VM with the Bit Hexagon Key 2.5).

Torques are depending on the material of the

mounting body (stainless steel 90 – 100 cN.m, PEEK 70

– 80 cN.m).

Important Note!

Do not press the fluid box body while fastening the

Connector BY. Otherwise, the Connector BY cannot

correctly grip into the fluid box body.