Mode Of Operation; General Terms - SPX FLOW APV DELTA SD4 Series Instruction Manual

APV
APV_SD4_ATEX_UK-0_122018.indd
SD4 double seal valve
with valve position indication
7
5. Mode of Operation
5.1.

General terms

DELTA SD4 double seal valves 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 SD4 double seal valves is to
shut off line sections which are separated from one another by two
seat seals. A leakage chamber is arranged between the seals, the
leakage chamber being forcibly closed by the two leakage valves or
opened to the atmosphere.
- Operation by pneumatic actuator with air connection, reset by spring
force.
- The inner parts of the actuator need not be serviced.
- To avoid pressure hammers, the valve is to be closed against the
flow direction of the fluid.
- The SD4 valve is equipped with a valve position indication.
The proximity switches to signal the final position of the valve disc
can be mounted to the proximity switch holder (PSH).
The use of valve position indicators which are approved for the
application in explosive atmosphere is compulsary.
The use and operation of valve position indicators shall be
evaluated by the operator of the installation!
Assembly, see item 13.3.
Valve position indicator
UK
Double seal valve
DELTA SD4-ATEX
Instruction Manual: UK - rev. 0