Bell & Gossett V58044B Circuit Sentry Automatic Flow-Limiting Valve User Manual

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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, first adjusting the

Automatic Flow-Limiting Valve in the full open

position, then wrap the valve with a cool wet rag and

then direct the flame with care to avoid subjecting

AFLV to excessive heat. Allow the valve to cool before

touching or operating.

e) Check the soldered connection for leaks.

Chart A

(SOLDER TYPE LIMITS PER ASTM STD. B16.22-1989)

OPERATING INSTRUCTIONS

Operation of the Automatic Flow-Limiting Valve is fully

automatic and does not require any adjustment. It auto-

matically maintains the selected flow over the designed

differential pressure range.

Before the system start up, remove cartridge from the valve.

Flush the hydronic system and then reassemble cartridge into

the valve and make sure cap is tightened properly. Start the

system and check for the AFLV leak.

HOW TO USE AUTOMATIC FLOW-LIMITING

VALVE PRESSURE TAPS TO DETERMINE

PROPER FUNCTIONING OF VALVE.

Using Bell & Gossett Model RP-250 readout probes,

attach a Bell & Gossett differential pressure readout kit to

the readout valves on the Automatic Flow-Limiting Valve.

Read the differential pressure across the Automatic Flow-

Limiting Valve. This can be compared to system pump

head to determine valve function, and system flow

blockage.

SERVICE INSTRUCTIONS

Should the Automatic Flow-Limiting Valve require cleaning or

changing the orifice, follow the following instructions.

Loosen and remove the bonnet (cap) from the valve body.

Pull the cartridge assembly from the valve body for

cleaning or change the new flow cartridge. Checking the

cartridge by pushing the orifice washer in to the cartridge

housing for several times to make sure spring is

functional.

If you design to changing the orifice washer (for more or

less flow rate). With a screwdriver, remove the clip ring

from inside the cartridge housing. Pull the orifice washer

out and replace with the new orifice that you have

preferred.

Reinstall, or replace the clip ring in the cartridge housing

groove and reassemble the bonnet with the O-ring.

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, the union tailpiece with nut must be

sweated (soldered) into place. Failure to follow this

instruction could result in property damage and/or

moderate personal injury.

TYPE OF

MAXIMUM LIMITATIONS

SOLDER

PRESSURE PSIG

TEMPERATURE ºF

95-5

300

175

TIN-

250

200

ANTIMONY

175

250

CAUTION: Heat associated with the use of silver

solder may damage an Automatic Flow-Limiting

valve 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.

CAUTION: Hot uninsulated surfaces can cause

burns to the skin. Do not touch hot surfaces.

Failure to follow these instructions could result in

moderate personal injury.

CAUTION: Hot uninsulated surfaces can cause

burns to the skin. Do not touch hot surfaces.

Failure to follow these instructions could result in

moderate personal injury.

WARNING: Hot water leakage can occur from

readout valve during probe insertion and during

hookup of readout kit. Follow the instruction manual

supplied with readout probes and readout kits for safe

use. Failure to follow this instruction could result in

serious personal injury and/or property damage.

WARNING: System fluid under pressure and/or at

high temperature can be very hazardous. Before

servicing, reduce system pressure to zero or isolate the

pressure reducing from the system. Leave drain valve

open. Allow system to cool below 100ºF (38ºC). Failure to

follow these instructions could result in serious personal

injury or death and property damage.

WARNING: Corrosion or leakages are indications

that the Automatic Flow Control Valve may be

about to cause serious damage from leakage or rupture.

It must be periodically inspected and if noted, it must be

replaced. Failure to follow these instructions could result

in serious personal injury or death and property damage.

Xylem Inc.

8200 N. Austin Avenue

Morton Grove, Illinois 60053

Phone: (847) 966-3700

Fax: (847) 965-8379

www.xyleminc.com/brands/bellgossett