Bell & Gossett V58046B Wafer Valve Automatic Flow-Limiting Valve User Manual

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c) Install the pressure readout fittings into the valve

body using the extension adapters first. Then install

the pressure and temperature access port onto the

extension adapter

inch NPT end.

OPERATING INSTRUCTIONS

Operation of the Wafer Valve is fully automatic and does not

require any adjustment. It automatically maintains the

selected flow over the designed differential pressure range.

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 Wafer Valve. This

can be compared to system pump head to determine

valve function, and system flow blockage.

SERVICE INSTRUCTIONS

Should the Wafer Valve require cleaning or changing the

orifice, consult the following instructions.

Remove the valve body from the piping system by

unbolting it from the two flanges on either side. Use the

lifting lug (eye-bolt for 4" thru 20") to handle/carry the

valve.

Pull the cartridge assembly from the valve body for

cleaning or change to new flow cartridge. The cartridge is

secured to the mid-plate of the housing by means of 2 or

3 allen head screws. Remove the screws first. Then pull

the cartridge out of the mid-plate bore. Checking the

cartridge by pushing the orifice washer in to the cartridge

housing against the spring force for several times to

make sure spring is functional. Inspect the interior of

cartridge for broken spring or any particles stuck inside

that may prevent free movement of the cartridge housing.

To change the orifice washer (for different flow rate),

remove the clip ring from inside the cartridge housing

with a screwdriver. Pull the orifice washer out and

replace it with the new orifice (orifice part number should

be facing upward). Push the new orifice in until it seats all

the way to the bottom of the shelf.

Reinstall, or replace the clip ring in the cartridge-housing

groove and make sure that it is holding the new orifice

disk securely in place.

Reassemble the cartridge into the mid-plate bore and

secure with the allen head screws.

CAUTION: The use of PTFE impregnated pipe

compound and PTFE tape on pipe threads

provides lubricity, which can lead to overtightening and

breakage. Do not overtighten. Failure to follow this

instruction can result in moderate personal injury and/or

property damage.

CAUTION: The generous use of pipe joint

compound when installing the adapter or P/T will

foul the valve operating mechanism preventing it from

functioning properly. Pipe joint compound must be

conservatively applied to male threads only. Failure to

follow this instruction can result in moderate 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. Failure to follow

these instructions could result in serious personal injury

or death and property damage.

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: Corrosion or leakages are indications

that the Wafer 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.

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.

Xylem Inc.

8200 N. Austin Avenue

Morton Grove, Illinois 60053

Phone: (847) 966-3700

Fax: (847) 965-8379

www.xyleminc.com/brands/bellgossett