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2. INSTALLATION
Figure 2 shows a typical installation. The HIR features a unique Steam Jacketed Lens Assembly that is mounted
directly to the isolation valve, which is mounted on the vessel nozzle flange. The Steam Jacketed Lens Assembly
is normally furnished in either a 2 inch or 3 inch flanged process connection size. Ensure the size and type flange
on the nozzle isolation valve matches the Steam Jacketed Lens Assembly mounting flange received. If the
connections do not match, contact Delta Controls to secure a unit with the necessary nozzle connection size and
type.
2.1 Mounting the Steam Jacketed Lens Assembly
While the unit is down, check the isolation valve mounted on the vessel to ensure it operates properly and
properly. Replace the valve if it appears to bind or if, there is any indication that it may leak. Close the valve (it will
be opened after the reactor reaches operating temperature of over +572
F (+300
C).
Bolt the flange of the Steam Jacketed Lens Assembly to the valve flange with the 1/8” NPT purge port at the top.
2.1.1 Steam Supply
Long-term reliability of this instrument requires the use of steam to maintain the temperature of the window and
nozzle above the melting point of sulfur. Failure to maintain a high enough temperature can allow sulfur to solidify
and build up on the window and nozzle surfaces, blocking the light and causing inaccurate temperature readings.
Connect the steam lines (in accordance with the best practices of your plant) to the upper (inlet) port and connect
a bucket type steam trap to the lower (outlet) port of the assembly. The standard steam port connections are
1/4” NPT. Insulating the steam lines is recommended, though not shown in Figure 1.
Clause
Thermal
Reactor
Steam Outlet
Fiber Optic Cable
Cable Tray Wiring Conduit
Electronics
Module
Wiring Conduit
Figure 2 – Typica l Installation
(Thermal insulation not shown)
Purge Supply
Steam Supply
Isolation Valve
