No Check Valve - Teledyne D series Installation And Operation Manual

D Series Syringe Pumps
Section 5 Continuous Flow Introduction, Installation, & Operation

5.6.4 No Check Valve

Figure 5-12 Keystrokes to set up No Check Valve
5-20
To limit fluid backflow from the pump to the supply reservoir one
of two approaches is generally used. Either a check valve is
installed in the supply line or the N
software feature is enabled on the controller.
The N C V (NCV) feature controls the opening of the
O HECK ALVE
inlet valves such that, just prior to refill, the pump is depres-
surized to a user-specified value (pressure point) or until a
user-specified time out period (time point). This reduces pressure
in the cylinder before the inlet valve is opened.
The NCV software feature is disabled by default; however, if no
check valve is installed on the supply line, it is recommended
that this feature is enabled.
Note
A check valve is not provided for Ball Valve Packages. It is rec-
ommended to turn O
valves.
1. Contin Const Flow
2. Contin Const Press
(O
( )
MORE
( - )
MULTI PUMP
1. Pressure Point
1. AB Pumps
2. Time Point
2. CD Pumps
3. Function NCV
C
O HECK
the NCV feature before operating the
N
O )
THER PTIONS
(NCV)
V (NCV)
ALVE