Bell & Gossett V59074B User Manual

INSTRUCTION MANUAL

V59074B

Low Flow Circuit Sentry

Model ACL Flow Limiting Valves

INSTALLER: PLEASE LEAVE THIS MANUAL FOR THE OWNER’S USE.

NOTE: This product is not intended for use in potable

water applications.

WARNING: This product may contain a
chemical known to the State of California
to cause cancer, or birth defects or other
reproductive harm.

SAFETY INSTRUCTION: This safety alert
symbol will be used in this manual to draw
attention to safety related instructions.

When used, the safety alert symbol means
ATTENTION! BECOME ALERT! YOUR SAFETY IS
INVOLVED! FAILURE TO FOLLOW THE INSTRUCTIONS
MAY RESULT IN A SAFETY HAZARD.

OPERATIONAL LIMITS

WORKING PRESSURE & TEMPERATURE LIMITS
(SOLDER TYPE LIMITS FOR ANSI STD. B.16.18)

COIL HOOKUP VALVE TEMP °F (°C) PRESSURE PSI (KPA)
Union Ended Ball
Valve (NPT) 250° (121°) 400° (2758°)
Union Ended Ball Based on solder type ASTM Std.
Valve (sweat) B16.18

TYPE OF
SOLDER

95-5
TIN­ANTIMONY

MAXIMUM LIMITATIONS 1/2” - 3/4”

PRESSURE
PSI (kPa)

300 (2069) 200° (93°)
250 (1724) 225° (107°)
200 (1379) 250° (121°)

TEMP
° F (° C)

DESCRIPTION

Low Flow Circuit Sentry Model ACL valve is designed to
automatically control the flow in piping systems to a
selected preset limit. As pressure differential increases, a
cartridge inside the valve body reduces the flow area to
accurately maintain the preselected flow rate.

CAUTION: Heat associated with the use of
silver solder may damage valve components
and void the product warranty. Do not use

silver solder. Failure to follow these
instructions could result in property damage and/or
moderate personal injury.

Flow Operating Range: 0.25 – 3.8 GPM

INSTALLATION INSTRUCTIONS

Low Flow Circuit Sentry Model ACL Flow Limiting Valves
are uni-directional valves and can be installed in most
orientations; Low Flow Circuit Sentry valves should be
mounted in the return pipe where temperatures are
lower and where the sealing gland is less affected by pipe
strain. Installation of strainers and isolation ball valves
is recommended. Be sure to install the Low Flow Circuit
Sentry ACL valve with the arrow pointing in the
direction of flow. Provide enough space around the
valve to ensure the flow cartridge can be removed for
flow adjustment or system commissioning.

LOW FLOW CIRCUIT SENTRY MODEL ACL VALVES
WITH SWEAT CONNECTIONS

For installing sweat connections, make sure that the flow
limiting cartridge has not yet been installed in the valve.
When confirmed, proceed as follows:

a) Clean tube ends and valve connections thoroughly per
good piping practices with a fine grade emery cloth or
fine grit sandpaper.

CAUTION: Excessive use of solder or flux
may result in damage to the shutoff valve
seat and ball. Do not use excessive solder or

flux. Failure to follow these instructions can
result in moderate personal injury and/or property
damage.

LOW FLOW CIRCUIT SENTRY MODEL ACL VALVES
WITH NPT CONNECTIONS

Apply pipe compound conservatively to male connecting
fittings only. After installation, check all the joints for
leakage and re-tighten if necessary.

CAUTION: The use of PTFE impregnated
pipe compound and PTFE tape on pipe
threads provides lubricity. Care should be

taken to prevent over tightening which may
damage the valve body. Failure to follow these
instructions can result in personal injury and/or
property damage.

LOW FLOW CIRCUIT SENTRY MODEL ACL VALVES

FLOW LIMITING CARTRIDGE INSTALLATION

b) For soldering, use 95-5 (Tin-Antimony) solder and a
good grade of flux.

c) Use a torch with a sharp pointed flame.

d) When sweating the joints, adjust the valve to the full
open position, then wrap the valve with a cool wet rag
and then direct the flame with care to avoid subjecting
the valve to excessive heat. Allow the valve to cool before
touching or operating.

e) Check the soldered connection for leaks.

WARNING: Use of improper procedures to
sweat valve model with union connection
into system can damage valve. Before

installing sweat union connection to valve,
remove the union nut and O-ring from the valve body,
then union tailpiece with union nut must be sweated
(soldered) into place. Failure to follow these
instructions could result in property damage and/or

moderate personal injury.