MECHANICAL CONNECTIONS
Connecting Inlets and Outlets
The CryoWiz™
inlets are located on the enclosure sides, and the outlet is on the bottom - see the General
Arrangement and the Back Detail Showing Mounting Tabs. The inlets and the outlet on the CryoWiz™ are
1/2” female NPT ports, each of which may include an optional male CGA 295 fitting. Use two open end
wrenches when tightening external devices to these fittings to prevent rotation of internal components. Do
not use pipe wrenches.
Installing Pipe Thread Connections
NPT connections require the use of PTFE tape on the threads to make a gas tight seal. On stainless steel
connections, PTFE tape also helps to prevent the connections from galling together when tightening or
loosening. Follow the rules below when using PTFE tape:
Taping procedure:
Before applying PTFE tape, inspect the NPT threads, and if necessary, clean the fitting to remove any dirt or thread
sealant that remains on the threads. Start the PTFE tape on the first thread leaving a slight section of the chamfer
exposed as shown in the figure above. Make sure the tape does not overlap the end of the fitting. As the tape is
wrapped in the direction of the thread spiral, pull tightly on the end of the tape so that the tape conforms to the
threads. Apply at least 2 but no more than 3 layers of tape to the threads. Cut off excess tape, and press the end
firmly into the threads.
Connecting the Condensation Drain Line
The CryoWiz™ is well insulated and, in most installations, will frost very little internally. However, to prevent any
moisture related condensation from accumulating inside, there is a ½” PVC flange on the enclosure bottom to
which an appropriate drain line can be connected.
Connecting the Dry Nitrogen Line
The CryoWiz™ requires a dry nitrogen gas supply between 95 and 110 PSIG connected to the pneumatic
dry nitrogen inlet port on the right side of the enclosure. Pneumatic dry nitrogen pressure must be present
for operation of the system. Do not use any other pneumatic gas source – use only dry nitrogen.
The pneumatic dry nitrogen inlet is a female 1/8” NPT port. Use an appropriate hose for connection.
The CryoWiz™ comes with an internal pressure switch to monitor the pneumatic dry nitrogen supply pressure
and to send an alarm signal if it drops below the pressure required by the device. The CryoWiz™ will not
operate if the pressure drops below 90 psig.
Once connected, pressurize the pneumatic dry nitrogen line and check for leaks with liquid leak test solution.
Rework any connections that show leaks.
To Next Page
Loading...
Need help?
General
