Vermes MDS 358X user Manual.pdf - 第53页

Micro disp en sing Va lve 42 VTK - TR -BA- 072e - 1 - User Manua l MDS 358X S eries 5.3 Technical Data Parameter Value Dispensable Quantity Down to 0. 4 nl per cy cle (for highly visc ous medium) Inlet Pressure Range Dep…

Microdispensing Valve

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

5.2 Explosion View Valve

The explosion view of an MDV 3580. Usually the cable connections point upwards, but on

request, they can be oriented differently, so that the cables point to the side. You can change the

orientation of the compressed air connections according to your needs. To do so, you will need a

hexagon key, size 1.5.

Fig. 19: Explosion view valve

1 Set of screws for cartridge holder

2 Cartridge holder

3 Adjust screw

4 Microdispensing valve

5 Connections for compressed air

for valve cooling – in (use

optional)

6 Connections for compressed air

for valve cooling – out (use

optional)

7 Tappet rod with tappet spring

8 Tappet centering screw

9 Tappet centering piece

10 Tappet sealing PE

11 Fluid box body with O-ring BY

12 Nozzle insert

13 Nozzle fixation nut

14 Isolation body (optional)

15 Connector BY

16 Heater MDH-48-BY

17 Tightening screw

18 Cartridge base CHI

19 Cartridge

20 Cable connection – Actuator

(red)

21 Cable connection – Sensor

(yellow)

22 Connection for heater cable

23 Connection for compressed air

Microdispensing Valve

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

5.3 Technical Data

Parameter Value

Dispensable Quantity

Down to 0.4 nl per cycle (for highly viscous

medium)

Inlet Pressure Range

Depending on the supply unit

(e.g. cartridge or pressure tank)

Dynamic Viscosity of Fluids

Low to high viscosity up to 2000000 mPas

Response Time (PLC-interface)

ca. 130 µs

Dispensing Frequency (max.)

> 3 kHz

Dispensing Frequency (average)

> 1 kHz

Compatibility

all aqueous fluids, organic solvents, weak acids and

bases

Dimensions (basic model)

92.1 mm x 41.5 mm x 36.5 mm

Weight

ca. 250 g (depending on configuration)

Position of Tappet in Absence of Voltage

open

5.4 Valve Types

Compatible with the MDC 3500 are valves of the following series.

• MDV 3580 (low to high viscosity; top adjust with bayonet fastening)

• MDV 3581 (low to high viscosity; top adjust with bayonet fastening)

• MDV 3583 (low to high viscosity; top adjust with bayonet fastening. You will need the

additional manual Quick Reference Guide MDV 3583.)

• MDV 3583-FH (low to high viscosity; top adjust with bayonet fastening and frame heater. You

will need the additional manual Quick Reference Guide MDV 3583.)

Which type is best suited for your application? This depends on different criteria. Air cooled

valves should be your choice, if you dispense with lots of power or if you use a nozzle heater and

constant temperatures are important.

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.