Alicat LC Series Liquid Flow Controller - Manual (Page 9)

9
MOUNTING
All L-Series Meters and LC-Series Controllers have mounting holes for
convenient mounting to flat panels. The sizes and dimensions for the mounting
holes are shown on pages 51-55.
Meters are position insensitive and can be mounted in any orientation.
Small valve controllers (LC-Series) can usually be mounted in any position.
Large valve controllers (LCR-Series) should be mounted so that the valve
cylinder is vertical. Mounting a large valve controller in another position
increases the risk of leakage when the controller is being held closed by the
spring force.
Note: For applications that may continuously introduce occasional air bubbles
to the flow stream upstream of the device, the device may be mounted
upside down to prevent the bubbles from becoming trapped in the differential
pressure sensor ports.
If the device has been installed upside down, avoid using the bleed
screws as water may leak into the electronics housing causing
permanent damage that is not covered under warranty!
PLUMBING
Your controller is shipped with plastic plugs fitted in the port openings.
To lessen the chance of contaminating the flow stream do not remove
these plugs until you are ready to install the device.
Make sure that the water will flow in the direction indicated by the flow arrow.
Standard L-Series Meters and LC-Series Controllers have female inlet and outlet
port connections. Welded VCR and other specialty fittings may have male ports.
The inlet and outlet port sizes (process connections) for different flow ranges
are shown on pages 51-55.
Instruments with M5 (10-32) ports have O-ring face seals and require no
sealant or tape. Do not use tape with welded or o-ring fittings.
For non M5 (10-32) ports use thread sealing Teflon® tape to prevent leakage
around the port threads.
Do not wrap the first two threads. This will minimize the possibility of getting
tape into the flow stream and flow body.
Do not use pipe dopes or sealants on the process connections as these
compounds can cause permanent damage to the controller should they get
into the flow stream.
When changing fittings, carefully clean any tape or debris from the port threads.
We recommend that a 20 micron filter be installed upstream of meter/
controllers with full scale ranges of 100 ccm or less and a 40 micron filter be
installed upstream of meter/controllers with full scale ranges above 100 ccm.
Avoiding long runs of small diameter tubing upstream or downstream
of the device will reduce water hammer.
Connecting Fittings and Filters
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