Mode Of Operation; General Terms - SPX FLOW APV DELTA SDMS4 Instruction Manual

APV
APV_SDMS4_UK-0_112017.indd
DELTA SDMS4
yoke
leakage valve
Double seal valve with diaphragm and ,,fan support"
DELTA SDMS4
Instruction Manual UK-rev.0
4.

Mode of Operation

4.1.

General terms

Use of high-quality stainless steel and seal materials to the
specified requirements, the double seal valve with diaphragm
control unit
and "fan support" DELTA SDMS4 is applicable in the food and
beverage industries as well as in the pharmaceutical and
chemical sector.
Double seal valves with diaphragm offer optimum protection
of the product in hygienic and aseptic applications. Product safety
is achieved by the hermetic separation of the product chamber
to the outside (atmosphere) by means of a flexible diaphragm
with "fan support".
- Leakage at the diaphragm is shown via a leakage indicator
actuator
in the yoke area.
The field of application of the DELTA SDMS4 comprises the
safe shut-off and separation of line sections being 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.
- Leakage at the seat seals is discharged via the leakage valves
to the atmosphere and indicated.
leakage indication
- Operation by pneumatic actuator with air connection.
The actuator is generally mounted normally closed (NC).
- The inner parts of the actuator are maitenance-free.
- To avoid pressure hammers, the valve should be closed against
the flow direction of the fluid.
- As standard design a control unit DELTA CU41N with NOT
housing
element is installed on top of the actuator for the pneumatic
control of the valve. The NOT element fulfills the task to increase
the closing forces of the closed valve.
- The luminous diodes in the control unit indicate the position
of the valve shaft.
- Observe service instructions to ensure safe maintenance of
the valve.
UK
4