ASA-1 – Air Pressure Switch
Civacon makes it easy and
convenient to add additional
safety to loading operations
All-in-One Packaging
Our Model ASA-1 Pressure Switch Assembly provides a
simple, easy, integrated package solution to adding a
pressure switch interlock to you overfill detection system.
Tank Protection
Just install the pressure switch as one of the Onboard
Monitor’s Auxillary inputs.The air signal recieved from
the tanks sequential vents can assure that all of you va
por vents are open before loading can begin.It can also
be easily installed directly into a socket on overfill detec
tion system installaions that do not require the use of an
onboard monitor
Terminal Vapor Recovery Hose Interlock
Do the terminals where your tank loads require that
the Vapor Recovery Hose is porperly connected prior
to allowing loading to begin”A second one of these
pressure switched can be installed in the Onboard
Monitor (or Socket), and wired as a second auxillary
input (Interlock), with its air signal for the Vapor Recovery
Adaptor’s interlock valve.Now your tank will be in
compliance to ensure that the vapor recovery hose is
connected before loading.
Versatile
Though designed with Overfill Detection System Auxillary
Interlock in mind, the versatile switch assembly will find
other uses on the tanker.Perhaps as a remote power
switch, hot-shift PTO engagement switch, or flow control
switch for a positive displacement pump.
Purpose Built
Specifically designed, one piece pressure switch assembly
screws directly into one or more of the onboard
monitor’s threaded ports.Comes with pre-installed
DOT 1/4” swivel air fitting.Ready to go, with no other
partsrequired.Replaces older design “Hobbs Switches”.
Easy to Install
This prepackaged, potted assembly is ready to install
• 1/2” NPT male thread
• 1/4” 90 swivel air tube fitting
• 12” tinned copper wires
Specifications
Details on the switch and its operations are as follows:
• Set Pressures:60+ 5 PSIG “On / Close”
•
45+ 5 PSIG “Off / Open”
• Maximum Applied Pressure:250 PSIG
• Temperature Range: -40° to 160° F
•
(-40° to 70° C)
• Single Pole Single Throw (SPST) Normally Open
Switch
• 12VDC/10A or 24VDC/5A (125VA) Switch Contact
Rating (Pilot Duty)
• Stainless Steel, Hermtically Sealed (Welded) Snap
Action Diaphragm
• Rated Life:100,000 cycles (Minimum)
• Nylon, DOT & SAE Compliant AIr Fitting
