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8 Manufacturer’s information
8.1 Transport
G Only transport the valve with
suitable means, do not drop it and handle
it carefully.
G Dispose of packing material
according to relevant local or national
disposal regulations / environmental
protection laws.
8.2 Delivery and performance
G Check the goods for completeness and
damages immediately upon receipt.
G The scope of delivery is apparent from
the dispatch documents and the design
from the order number.
G The valve's delivery condition:
Control function: Condition:
1 Normally closed (NC) closed
2 Normally open (NO) open
3 Double acting (DA) undefi ned
8 Double acting (normally open) open
G The function of the valve is checked at
the factory.
8.3 Storage
G Store the valve so that it is protected and
dry in its original packaging.
G Avoid UV rays and direct sunlight.
G Maximum storage temperature: 60°C.
G Solvents, chemicals, acids, fuels or the
like must not be stored in the same room
as valves and their spare parts.
8.4 Tools needed
G The tools required for installation and
assembly are not included in the scope of
delivery.
G Use appropriate, functional and safe
tools.
9 Function description
The GEMÜ 550 pneumatically operated 2/2-
way valve is a metal angle seat globe valve
with a straight through body and a piston
actuator. The valve bodies are available in
various designs as shown in the data sheet.
An optical position indicator is standard for
NC control function (optional for NO and DA
control functions). Diverse accessories are
available, such as electrical position
indicators, stroke limiters, electro-pneumatic
positioners and process controllers.
The valve seat is sealed by a PTFE seal in
the valve plug. The valve spindle is sealed
by a self-adjusting gland packing providing
low maintenance and reliable valve spindle
sealing even after a long service life. The
wiper ring fi tted in front of the gland packing
protects the seal against contamination and
damage.
9.1 Special venting
A special air vent for the actuator spring side
was designed (e.g. for the food industry)
using a check valve. This prevents ingress
of dirty water and cleaning media into the
actuator housing. This is an option for valves
available ex works (see order data section
"Special versions").
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