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When it comes to flow...we’re instrumental.
2
CAUTION
• 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.
CLEANING
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.
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 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.
FLOAT TYPES AND ORIENTATIONS
Installation Instructions
Maximum Non-Shock Pressure and Temperature
Temp
Pressure
Liquid
250° F
PVC - 130 psig
PVDF - 150 psig
Gas
200° F
Ambient Temp. 33° F -125° F
BL FLOAT
7440 Series
PVC/PVDF
FRAME
O-RING
COMPRESSION SCREW
1) Inspect meter for damage that may have occurred during shipping. Report
any damage to the container to the freight carrier immediately.
This is important information. Read it carefully before
beginning work.
2) Make sure your pressure, temperature, fluid 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 flow 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.
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
fluid leaks at the threaded connections.
4) Handle the meter carefully during installation.
a) Use an appropriate amount of teflon 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.
GLASS TUBE GASKET
TUBE ADAPTOR
GLASS METER TUBE
SCALE PLATE
FLOAT STOP
SEAT BUSHING
MOUNT SCREW
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.
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 float 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
flow 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.
BL FLOAT
SCALE PLATE MOUNT
SCALE PLATE SCREW
SCALE PLATE
SHIELD
FLOAT
2X
2X
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.
Maximum Non-Shock Pressure and Temperature
200 psig
200°F
250°F
Temperature
Pressure
Gas
Liquid
Ambient
33°F - 125°F
Temperature
READ
HERE
2X
6) Meters with plastic fittings must be installed so that fittings are not made to
support any part of the associated plumbing. In addition, meter frame should
be fastened to bulkhead, panel or column.
4X
END FITTING SCREW
OUTLET END FITTING
INLET END FITTING
7/11/2013 1:50:19 PM
