4
APV_SW4_UK-4_082017.indd
UK
Single seat and change-over valve
DELTA SW4
Instruction manual: UK - rev.4
APV
4. Mode of Operation
4.1.
General terms
Single seat and change-over valves DELTA SW4 have been
developed for use in the brewing and beverage, dairy and food
industries as well as for chemical and pharmaceutical applications.
The valves are designed for universal applications and stand out
for their increased mechanical reliability and absolute ease of
service.
The field of application of the DELTA SW4 valve is to shut off
and to change over line sections.
- Operation by pneumatic actuator with air connection, reset by spring
force.
- By different assembly of the actuator, the following designs are
possible:
NC:
actuator normally closed / air-to-raise, spring-to-lower
NO:
actuator normally open / air-to-lower, spring-to-raise
- The inner parts of the actuator need not be serviced.
- As standard design, the SW4 valve is equipped with a control unit
CU41 Direct Connect.
The luminous diodes in the control unit indicate the position of the
valve shaft.
control unit
actuator
actuator screw
yoke
housing
housing
upper housing
shaft
shaft
Single seat valve
Change-over valve