SPX APV DELTA M4, Руководство по эксплуатации

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3. Mode of Operation
Membrane valves DELTA M4 have been developed for use in the
brewing and beverage industries, dairy and food applications as
well as in the chemical and pharmaceutical industries.
The function of the DELTA M4 valve is to shut off line sections.
The membrane valves offer optimum protection of the product in
hygienic and aseptic applications. Product safety is provided by the
hermetic separation of the product chamber from the environment
(atmosphere) by a flexible membrane.
- Operation by pneumatic actuator with air connection,
reset by spring force.
- By different assembly of the actuator, the following designs can
be realized:
NC: actuator normally closed
("fail-down": air-to-raise, spring-to-lower)
NO: actuator normally open
("fail-up": air-to-lower, spring-to-raise)
- The inner parts of the actuator are maitenance-free.
- The cleaning of the inner area of the valve is undertaken
during CIP cleaning of the line system.
- Leakages at the membrane are indicated at the leakage drain
in the yoke area.
- For the pneumatic control of the valve, a control unit is installed
on top of the actuator.
- The yellow luminous diodes installed in the control unit indicate
the position of the valve rod.
- For aggressive products, the MP design of the inner parts with
a membrane shaft out of TFM should be used.
3
control unit
DELTA CU
valve position
indicator
actuator
yoke
leakage
indicator
housing
Membrane Valve
DELTA M4
Operating Manual Rev. 1
UK