Mode Of Operation - SPX APV DELTA DF plus 2 Operating Manual

DELTA DFplus2 - UK1 / qxd.12.2004
A
B
C
actuator
D
F
3
3.

Mode of Operation

Due to its construction and mode of operation as well as to the use
of high-quality stainless steel and adequate seal materials, the
seat lift
double seat valve DFplus2 is suited for the food and beverage
actuator
industries as well as for pharmaceutical and chemical applications.
- The valve opens from the top to the bottom.
- Separation of two line sections by two valve disks with intermediate
flushable leakage chamber. Cleaning connection at (D)
with ½" clamp connection.
- Double sealing function by two independently acting seals.
- Any leakages at the valve seats are discharged at (F) in
depressurized state.
- Valve feedback switches can be installed at (E).
coupling
- Actuation by pneumatic actuator with air connection at (C).
Reset by spring force.
E
- The double seat valve is generally mounted in the actuator design
"fail-up" (air-to-lower, spring-to-raise). With air failure, the valve
leakage
moves into the safety limit position "closed".
chamber
- For seat cleaning purposes a seat lift actuator can be mounted on
the actuator.
housing
- Seat lift actuator
connection A = lifting of lower valve seat
E
connection B = lifting of upper valve seat
UK
Double Seat Valve
DELTA DFplus2
Operating Manual: rev. 1