10
5.1
PULSAlarm® Reagent Head
The PULSAlarm® leak detection
reagent head assembly consists
of reagent head, leak detection
diaphragm, suction and discharge
check valves, bleed port, and
optional switch and gauge. The
reagent head, diaphragm, suction
and discharge check valves are
the only parts of the pump to
contact the process liquid;
consequently, maintenance is
critical to pump performance
Figure 1 – reagent head
5.2
PULSAlarm® Leak Detection Diaphragm
Double, or sandwiched, PTFE diaphragms are sealed at their peripheries to an intermediate
metal spacer ring. The space between the diaphragms is sealed so that the diaphragm
functions as does a standard single diaphragm. For the pressure system, the space between
the diaphragms is filled with a small amount of fluid. This space is connected to an adjustable
electrical switch (optional) that actuates in response to loss of vacuum or buildup of pressure
resulting from rupture of either or both diaphragms. Switch operation can be used to perform
any external function, typically to signal an alarm or turn off the pump. Refer to
Figures 1 and
2.
During installation, ensure that adequate space is available at the front of the
reagent head assembly to allow for service of both the pressure switch and the
diaphragm assembly.
