3-P, Houston, Texas

SafEye provides gas monitoring for curing ovens:
3-P manufactures performance plastic products.  When specified, plastic lined products are oven cured in excess of 750°F for over 10 hours.  The process hardens the plastic and helps mold the plastic to pipes.  If the process is not managed properly, it can create explosive limits of evaporating hydrocarbons.  3-P recognized the potential hazards of curing plastics and contracted Quality Hill Engineers in Houston, Texas, to find a solution.  Quality Hill found that single point gas detector designs could not handle high temperatures, so they selected the Model 300 SafEye Open Path, which is a non-intrusive duct mount detector.  With slight modifications, the SafEye was fitted for high temperature service.

During testing, Quality Hill also found the SafEye to be highly accurate and that it could be used as part of the control scheme.  As a result, the SafEye uses the contact relays for shut down and the 4-20 mA output to control fan speed and temperature settings.

This installation has been in operation since the middle of the year 2000.

Akzo Chemical Plant, Bayport, Texas

Akzo Chemical Plant produces many types of catalysts using batch processing techniques.  The processes produce residual flammable and toxic gases that are sent to a thermal oxidizer for neutralizing.  If these gases were to inadvertently enter the high-speed air intake of the thermal oxidizer, hazardous problems would occur in seconds.

The solution was to install two SafEye Model 300 Duct Mount Detectors in the air intake using the lowest span settings of 0-1 LEL x M.  This setting provides warning indications at 0.4 LEL x M and alarm shutdown at 0.6 LEL x M.  Start-up tests using low LEL filters put the unit in alarm within two seconds!

Akzo was also pleased with the speed of maintenance.  The units were wired to take advantage of the RS-485 outputs that provide diagnostics and calibration functions from a remote site.

British Petroleum (BP), Alaska

SafEye Air Duct Gas Monitoring System Model 301 Units are installed in large intake ducts of British Petroleum installations in Prudhoe Bay, Alaska. The duct units monitor the incoming air, detecting hazardous and explosive gases that may enter the power modules, on the North Slope, where temperatures can reach down to -40 degrees.


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