
www.gemu-group.com 5 / 24 GEMÜ 205
2 Safety information
The safety information in this document refers only to an indi-
vidual product. Potentially dangerous conditions can arise in
combination with other plant components, which need to be
considered on the basis of a risk analysis. The operator is re-
sponsible for the production of the risk analysis and for com-
pliance with the resulting precautionary measures and re-
gional safety regulations.
The document contains fundamental safety information that
must be observed during commissioning, operation and main-
tenance. Non-compliance with these instructions may cause:
- Personal hazard due to electrical, mechanical and chemical
effects.
- Hazard to nearby equipment.
- Failure of important functions.
- Hazard to the environment due to the leakage of dangerous
materials.
The safety information does not take into account:
- Unexpected incidents and events, which may occur during
installation, operation and maintenance.
- Local safety regulations which must be adhered to by the
operator and by any additional installation personnel.
Prior to commissioning:
1. Transport and store the product correctly.
2. Do not paint the bolts and plastic parts of the product.
3. Carry out installation and commissioning using trained
personnel.
4. Provide adequate training for installation and operating
personnel.
5. Ensure that the contents of the document have been fully
understood by the responsible personnel.
6. Define the areas of responsibility.
7. Observe the safety data sheets.
8. Observe the safety regulations for the media used.
During operation:
9. Keep this document available at the place of use.
10. Observe the safety information.
11. Operate the product in accordance with this document.
12. Operate the product in accordance with the specifications.
13. Maintain the product correctly.
14. Do not carry out any maintenance work and repairs not de-
scribed in this document without consulting the manufac-
turer first.
In cases of uncertainty:
15. Consult the nearest GEMÜ sales office.
3 Product description
3.1 Construction
Item Name Materials
1 Plug PA
2 Optical position
indicator
PVC
3 Manual override PBT
4 Valve housing PBT
5 Valve body PVC-U, grey or PVDF
Seal materials FPM, PTFE or EPDM
3.2 Description
The GEMÜ 205 directly controlled 2/2-way plastic solenoid
valve has a high performance coil. It is hermetically separated
from the medium by means of a flexible PTFE bush. The
armature is sealed by a bellows made of PTFE backed by an
additional safety diaphragm. The plug has a rectifier for use
with an AC supply. A manual override and an optical position
indicator are integrated as standard.
3.3 Function
The GEMÜ 205 directly controlled 2/2-way plastic solenoid
valve is designed for controlling media.
When the valve is closed the medium flows into the valve
body and presses onto the piston. The valve remains closed.
Observe the permissible operating pressure (see “Technical
data“, page8).
Fig.1: Valve CLOSED
CAUTION
Operating pressure too high
▶Damage to the solenoid / destruction of the solenoid.
3 Product description