7
Monitoring and
External Control Line
This 243 is used for the first regulator (upstream regulator) in a
monitor set or for other applications requiring an external down-
stream control line.
A throat block with an o-ring stem seal isolates the lower
diaphragm chamber which has a
1
⁄
2
” FNPT connection for the
external control line.
Use of this regulator for monitoring is shown on page 20.
Capacities with the external control line are provided on pages
12 and 13.
Pilot Operated Regulator
The 243-RPC is a genuine pilot operated regulator. It works on
exactly the same relay-operation principle as the widely used
models 1100 and 1200, and the 441-VPC.
Like its bigger brothers, it not only provides remarkably precise
pressure regulation but it maintains that high level of accuracy
even for wide variations in inlet pressure.
The 243-RPC can be used for any outlet pressure from 3
1
⁄
2
” w.c.
to 35 psig with capacity ranging as high as 75,000 scfh.
For detailed information please refer to Bulletin R-1343.
