4
A. GENERAL:
Be sure that all pipes and fittings used are clean, free of chips,
dirt and moisture. If pipe compound or shellac is used, apply a
small amount above the second or third male thread only.
DO NOT GET PIPE COMPOUND OR SHELLAC INSIDE
RELAY.
B. MOUNTING:
When installing the relay do not remove the "Caplugs" (plastic
plugs) from the connections until ready to install fittings.
The relay may be mounted in any position. Due to its size and
weight, it may be supported by the air lines. If more secure
mounting is desired, use the mounting bracket furnished as
shown in Figure 1. Use two 1/4" bolts, toggle bolts or wood
screws as required by the installation. Bracket may be
removed or inverted by removing lock nuts.
C. CONNECTIONS:
The input, supply and output ports are 1/4" female NPT. The
exhaust port is 1/16" NPT. Make the air connections to the
proper ports as shown in Figure 1. The air supply must be
clean, dry and regulated (use filter - regulator #97478) and
must not exceed 60 psig (4.2 bar).
Air pressure in the input chamber exerts a downward force on
the input diaphragm. This force moves the center assembly
down, closing the exhaust valve. Further movement opens
the lower portion of the valve allowing the supply air
pressure to enter the output chamber. This air acts on the
control diaphragm and also passes out through the output
port. As the increasing output pressure approaches the input
pressure, the center assembly will begin to rise, permitting
the valve to close, throttling the flow of supply air. When the
output pressure equals the input pressure, both surfaces of the
valve will be closed and the relay will be in balance.
A further increase in the signal pressure will cause the lower
portion of the valve to open until the output pressure again
SECTION II - INSTALLATION
SECTION III - OPERATION
Figure 1
THIS RELAY WILL WORK PROPERLY WHEN MOUNTED IN
ANY POSITION.
Figure 2
Summary of Contents for CR-101-A1
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