King Instrument 7440 Series Installation Instructions Manual

7440 Series PVC/PVDF

FLOW METER LIMITED WARRANTY

Meters are warranted against defects in materials and workmanship to the original user for a period of thir­teen (13) months from the date of factory shipment, provided the meter is installed, operated and maintained
in accordance with King Instrument Company’s instructions and recommendations.

This warranty does not apply if failure is caused or contributed to by any of the following: improper handling,
improper storage, abuse, unsuitable application of the product, lack of reasonable and necessary mainte­nance, use exceeding suggested pressure and temperature maximums, improper packaging for return, or
repairs made or attempted to be made by anyone other than King Instrument Company, Inc.

KING INSTRUMENT COMPANY, INC. MAKES NO WARRANTY AS TO THE FITNESS OF ITS PRODUCTS FOR SPECIFIC
APPLICATIONS.

This warranty is valid for the original end-user only and does not apply to products that have been damaged
or modied. This warranty is non-transferrable and is limited to replacement or repair. The liability of King In­strument Company arising out of its supply of the products, or their use, shall not in any case exceed the cost
of correcting defects in the products as set forth above.

THIS WARRANTY IS A LIMITED WARRANTY AND SHALL BE IN LIEU OF ANY OTHER WARRANTIES, EXPRESSED OR
IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OR MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. THERE ARE NO OTHER WARRANTIES WHICH EXIST BEYOND THE DESCRIPTION OR FACE
HEREOF.

IN NO EVENT SHALL KING INSTRUMENT COMPANY BE LIABLE FOR LOSS OF PROFITS, INDIRECT, CONSEQUEN­TIAL OR INCIDENTAL DAMAGES.

Products should be returned, prepaid, to King Instrument Company, Inc. with proof of purchase. Call factory
for Return Merchandise Authorization (RMA) number and return instructions.

PVC/PVDF

Installation Instructions

THIS IS IMPORTANT INFORMATION.
READ IT CAREFULLY BEFORE BEGINNING WORK.

1) Inspect meter for damage that may have occurred during shipping.
Report any damage to the container to the freight carrier immediately.

2) Make sure your pressure, temperature, uid and other requirements
are compatible with the meter (including o-rings.)

3) Select a suitable location for installation to prevent excess stress on
the meter which may result from:

a) Misaligned pipe.

b) The weight of related plumbing.

c) “Water Hammer” which is most likely to occur when ow is
suddenly stopped as with quick closing solenoid operated
valves. (If necessary, a surge chamber should be installed. This
will also be useful in pressure start-up situations.)

d) Thermal expansion of liquid in a stagnated or valve isolated
system.

e) It is recommended to install valving which will allow the meter
to be drained. Meter should be drained when not in use or
prior to maintenance.

f) Instantaneous pressurization which will stress the meter and
could result in tube failure.

NOTE: In closed thermal transfer or cooling systems, install the meter

in the cool side of the line to minimize meter expansion and
contraction and possible uid leaks at the threaded connections.

4) Handle the meter carefully during installation.

a) Use an appropriate amount of teon tape on external pipe
threads before making connections. Do not use paste or stick
type thread sealing products.

5) Install the meter vertically with the inlet port at the bottom.

6) Meters with plastic ttings must be installed so that ttings are not
made to support any part of the associated plumbing. In addition,
meter frame should be fastened to bulkhead, panel or column.

7) Meters used in gas service should have suitable valves plumbed in
at the inlet and outlet of the meter. These valves should be no more
than 1-1/2 pipe diameters from the meter ports. The valve at the out­let should be used to create back pressure as required to prevent oat
bounce. It should be set initially and then left alone. The inlet valve
should be used for throttling purposes. Depending on the installation,
valves may not be essential, but they are most useful in many instal­lations. Remember: To get a correct reading of ow in gas service, it is
necessary to know the pressure right at the outlet of the meter (before
the valve).

8) Pressure and temperature maximums must never be exceeded.

[phone] • www.kinginstrumentco.comWhen it comes to ow...we’re instrumental.

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7440 Series PVC/PVDF

Pressure and temperature ratings are based on a study of the engineering
data for particular materials used in construction and on the design of
individual models. This information is supplemented by destructive test
results. Meters with stainless enclosures must never be operated without
shields securely in place. Meters exposed to difficult environments such
as those created by certain chemicals, excessive vibration or other stress
inducing factors could fail at or below the suggested maximums. Never
operate meters above pressure and temperature maximums. It is strongly
recommended that all meter installations utilize an appropriate pressure
relief valve and/or rupture disc. The pressure settings and locations of
these devices should be such that meters cannot be over pressurized.
Meter failure could result in damage to equipment and serious personal
injury. Always use suitable safety gear, including OSHA approved eye
protection when working around meters in service. We are happy to pass
along chemical compatibility information that has been published by the
manufacturer's of raw materials used in our products; however, this
information should not be construed as a recommendation made by King
Instrument Company, Inc. for a specific application.

7440 meters that require repair should be sent to the factory. Please call

for a Return Merchandise Authorization (RMA) number and return

instructions.

-7440 Series meters have o-ring seals. Use with incompatible fluids may
cause o-rings to swell which may cause glass tube to fail.

-Extra caution must be exercised when meters are used in high pressure
gas cylinder applications. Pressure regulators should be installed at the
cylinder and at the inlet of the meter.

-Serious property damage and great personal injury could occur as the
result of a meter misused or used in an unsuitable application.

Carefully remove the flowmeter from the piping system. Remove the front
shield and the top frame plug. Insert a

3

16

" hex key in the outlet hole and
into the compression screw. Turn the hex key counter clockwise until the
compression screw is raised enough to be able to remove the glass tube.
Carefully remove the glass tube. Remove the compression screw by
turning the hex key clockwise. Float and float stops may be removed by
inserting a rod into one end of the glass tube and carefully pushing the
components out the other end.

All components are now fully accessible for cleaning. Components can be
cleaned with a mild soap solution. This will be an effective cleaner of rust
stains. A cotton swab may be helpful in cleaning the inside of the glass
tube. Caution must be used so that materials of construction are not
damaged by cleaning solutions. Hard water deposits can be removed with
a 5% acetic acid solution (vinegar). Before the meter is reassembled,
inspect all parts for damage. O-rings should be replaced during meter
maintenance and cleaning.

To reassemble, insert bottom float stop into glass tube and push it down

with a rod. Insert the ball float and top float stop. Install the compression
screw with the

3

16

" hex key, turning counter clockwise. Install the gaskets,

seat bushing, and tube adapters (

1

8

" float models only). Position glass
tube in frame assembly and begin to turn the compression screw
clockwise. Make sure that the tube is centered and that the reference line
is facing frontward. Tighten compression screw to 4 in. lbs. of torque.
Replace shield by snapping it into place.

200 psig

200°F

250°F

Temperature Pressure

33°F - 125°F

Installation Instructions

Maximum Non-Shock Pressure and Temperature

Temp Pressure

Liquid 250° F PVC - 130 psig

Gas 200° F

Ambient Temp. 33° F -125° F

PVDF - 150 psig

CAUTION

• 7440 Series meters have o-ring seals. Use with incompatible uids
may cause o-rings to swell which may cause glass tube to fail.

• Extra caution must be exercised when meters are used in high
pressure gas cylinder applications. Pressure regulators should be
installed at the cylinder and at the inlet of the meter.

• Serious property damage and great personal injury could occur as
the result of a meter misused or used in an unsuitable application.

CLEANING

Carefully remove the owmeter from the piping system. Remove
the front shield and the top frame plug. Insert a 3/16” hex key in the
outlet hole and into the compression screw. Turn the hex key counter
clockwise until the compression screw is raised enough to be able to
remove the glass tube. Carefully remove the glass tube. Remove the
compression screw by turning the hex key clockwise. Float and oat
stops may be removed by inserting a rod into one end of the glass
tube and carefully pushing the components out the other end.

All components are now fully accessible for cleaning. Components
can be cleaned with a mild soap solution. This will be an eective
cleaner of rust stains. A cotton swab may be helpful in cleaning the
inside of the glass tube. Caution must be used so that materials of
construction are not damaged by cleaning solutions. Hard water
deposits can be removed with a 5% acetic acid solution (vinegar).
Before the meter is reassembled, inspect all parts for damage.
O-rings should be replaced during meter maintenance and cleaning.

To reassemble, insert bottom oat stop into glass tube and push
it down with a rod. Insert the ball oat and top oat stop. Install
the compression screw with the 3 16” hex key, turning counter
clockwise. Install the gaskets, seat bushing, and tube adapters ( 1/8”
oat models only). Position glass tube in frame assembly and begin
to turn the compression screw clockwise. Make sure that the tube
is centered and that the reference line is facing frontward. Tighten
compression screw to 4 in. lbs. of torque. Replace shield by snapping
it into place.

REPAIR

7440 meters that require repair should be sent to the factory. Please
call for a Return Merchandise Authorization (RMA) number and
return instructions.

WARNING:

Pressure and temperature ratings are based on a study of the
engineering data for particular materials used in construction and on
the design of individual models. This information is supplemented
by destructive test results. Meters with stainless enclosures must
never be operated without shields securely in place. Meters exposed
to dicult environments such as those created by certain chemicals,
excessive vibration or other stress inducing factors could fail at
or below the suggested maximums. Never operate meters above
pressure and temperature maximums. It is strongly recommended
that all meter installations utilize an appropriate pressure relief valve
and/or rupture disc. The pressure settings and locations of these
devices should be such that meters cannot be over pressurized.
Meter failure could result in damage to equipment and serious
personal injury. Always use suitable safety gear, including OSHA
approved eye protection when working around meters in service.
We are happy to pass along chemical compatibility information that
has been published by the manufacturer’s of raw materials used in
our products; however, this information should not be construed
as a recommendation made by King Instrument Company, Inc. for a
specic application.

FLOAT TYPES AND ORIENTATIONS

READ
HERE

BL FLOAT

[phone] • www.kinginstrumentco.comWhen it comes to ow...we’re instrumental.

2