Flomatic C150P Shematics

MODEL C150P

Regulating Valve with Integral By-Pass

1-1/2"& 2"

Repair Instructions

HOW TO MAKE REPAIRS

Shut Off Water Service Before Disassembly

1. Open a faucet on dwelling to relieve line pressure.

2. Loosen adjustment bolt and lock nut counter clockwise.

3. Remove bell, spring and spring disc.

4. Remove cartridge.

5. While disassembled open gate valve to flush out valve body.
TO REASSEMBLE

1. Replace cartridge-tighten.

2. Replace diaphragm, diaphragm disc and bolt-tighten screw securely.
(CAUTION: Be sure the rounded edge of diaphragm disce is next to
diaphragm.)

3. Replace spring, spring disc, friction ring and bell. Tighten bell.

4. Turn adjusting bolt clockwise to old setting.

5. Enter dwelling and turn on several faucets.

6. Turn on water service. Let faucets run for several seconds, then turn off.

7. Adjust regulator to desired pressure. Turn clockwise to raise pressure,
or counter clockwise to lower pressure. After setting to desired pressure,
tighten lock nut.

BALANCED PISTON REGULATOR

Install valve in line with arrow in valve body pointing in direction of flow.
For household use install reducing valve, when possible, in such a position that hose valve is on the high or street
side of reducing valve.
Before installing reducing valve flush out line to remove loose dirt and scale which might damage seat washer and
seat.
All valves will be furnished with stock settings to reduce to 50 lbs., unless otherwise specified.
To readjust for reduced pressure, loosen lock nut and turn adjustment bolt clockwise to raise reduced pressure
or counter clockwise to lower reduce pressure.
For Household Service: When a reduced valve is used it makes a closed system and therefore a Pressure Relief
Valve must be installed to protect equipment against excess pressure which is built up by the expansion of water
from the domestic hot water supply tank or heater.
Standard Construction: Suitable for either water or air service. Oil service requires special diaphragm and disc.

Do not use standard construction on oil service.
Warranty: Flomatic Regulators are guaranteed against defects of material or workmanship when used for the

services recommended. If, in any recommended service a defect develops due to material or workmanship, and the
regulator is returned, freight prepaid, to us within 12 months from date of shipment from our factory, it will be repaired
or replaced free of charge. The Flomatic Corporation liability shall be limited to our agreement to repair or replacement
of regulator only. The Flomatic regulator described in this Bulletin is suitable for either water or air service. Oil service
requires special diaphragm and disc. Do Not use standard construction on oil service.

High Quality Valves Built To Last...

15 PRUYN'S ISLAND DRIVE

800-833-2040 * 518-761-9797 * Fax: [phone]

worldwideweb://www.flomatic.com * e-mail: [e-mail]

GLENS FALLS, NY 12801

FILE:C150

General Trouble Shooting

Pipe lines in a water supply system must be of sufficient carrying capacity to maintain adequate pressure at
the most remote or highest fixture. Under the maximum probable fixture use, minimum adequate pressure is
generally 8 to 15 lbs., but may be more, depending on the equipment being supplied.
Relatively high to high service pressures which can create high water velocities in pipe lines would allow use
of smaller pipes to satisfy fixture use. However, high velocities tend to cause whistling and humming. Reduc­tions of pressure by the use of a pressure reducing valve, in an attempt to eliminate the undesirable condition,
may reduce pipe line capacities below that adequate for maximum probable use.
When high service pressures are in effect, either continuously or periodically, the application of a pressure
reducing valve will be successful only when the installed pipe line is of adequate size to satisfy the system
demand at the lower pressure.
When actual water demands are unknown, the valve size should be no less than the existing pipe size.

PROBLEM

1. Pressure creeps or builds up in a system above
setting of pressure reducing valve.

A. Thermal expansion of water as it is being heated.
B. Foreign matter on seating face of seating washer (car­tridge).
C. Cut, worn or chipped seat washer (cartridge).

SOLUTION:

A. This is a natural consequence. It may happen each time that the heater runs. A pressure relief valve must be
installed. It will not prevent pressure but will limit it to a safe level.
B. Flush the reducing valve by opening one or two fixture outlets wide. If this does not correct trouble, remove seat
washer (cartridge) for cleaning.
C. Replace with new repair kit. Temporary repairs may be made by turning seat washer over. If pressure creeps only
when heater is running, it is probably due to conditions of 1A.

PROBLEM

2. Pressure and fixture flow unsteady.

A. Low water supply pressure in mains caused possible by
high area demands during certain periods of the day.
B. Heavy periodic demands by appliances in the house.

SOLUTION:

A. This is a water department problem. It is due to the mains being inadequate for the demands made on them.
B. House service lines may at times be inadequate for the load. Size of some pipelines may need to be increased.
Pressure setting of reducing valve may be too low. Try increasing pressure before changing pipelines.

POSSIBLE CAUSE OR CAUSES

POSSIBLE CAUSE OR CAUSES

PROBLEM

3. Small inadequate flow from fixtures.

A. Pipelines to fixtures may be too small or house main supply
may be inadequate for normal fixture demand.
B. Pressure reducing valve adjustment may be too low.

POSSIBLE CAUSE OR CAUSES

SOLUTION:

A. It may be necessary to increase pipe size only in some sections of the system leading to the offending appliances
or fixtures. Increasing the house service mains might be necessary if small supply is general at all fixtures.
B. Raise pressure gradually by readjusting valve until this point is determined.
C. Clean screen.

PROBLEM

4. Valve appears to be noisy, hums, whistles or
chatters.

A. Hum or whistle is usually caused by high velocity of flow in
pipelines causing vibration.
B. Chatter usually originates with worn seat washer (cartridge)
or loosely installed seat washer (cartridge).

POSSIBLE CAUSE OR CAUSES

SOLUTION:

A. Pipelines could be small or too light. Reducing valves could be too small. Pipelines and valves being too small
would accentuate this condition.
B. Inspect seal ring. If a deep channel appears on seal ring face, replace or use the opposite side.
C. Frequently, noise originates in a faucet or appliance and seems to originate in the reducing valve. There is a
general tendency to use streamline piping of a relatively small size. Velocity is naturally high, and noise of the fast
moving-water is not unusual.

High Quality Valves Built To Last...

800-833-2040 * 518-761-9797 * Fax: [phone]

worldwideweb://www.flomatic.com * e-mail: [e-mail]

15 PRUYN'S ISLAND DRIVE

GLENS FALLS, NY 12801