Mode Of Operation; General Terms - SPX FLOW APV DELTA DE3 Instruction Manual

APV
APV_DE3_UK-7_082017.indd
DE3 double seat valve
main cylinder
spring cylinder
C
optical
valve position indication
fig. 4.1.
Double Seat Valve
DELTA DE3
Instruction manual: UK - rev. 7
4.

Mode of Operation

4.1.

General Terms

Due to its construction and mode of operation as well as to
the use of high quality stainless steel and adequate seal
materials, the double-seat mixproof valve DELTA DE3 is suited
for applications in the food and beverage industries as well as in
the pharmaceutical and chemical industries.
The valves are designed for universal applications and stand out
for their increased mechanical reliability and absolute ease of
service.
The valve opens from the top to the bottom in low leakage
operation (unpressurized drain of fluid residues via the annular
cleaning gaps in the seat area).
Separation of two line passages by two balanced and
housing
independently operating valve slides with intervening leakage
chamber. Flushing connection at (B1).
Double sealing function by two seals acting independently of
one another.
Arising leakages at the seat seals are discharged at (C) in
depressurized state.
B 1
Proximity switches can be installed at the main cylinder as valve
position indicators. (fig. 4.1.)
Operation by pneumatic actuator with air connection at (A). Reset
by spring force into the safety limit position "closed".
Main cylinder can be maintained.
Optical indication of the valve position at the main cylinder.
A
main cylinder
UK
4