(714) 891-0008 • www.kinginstrumentco.com
When it comes to flow...we’re instrumental.
2
CAUTION
• 7430 Series meters have o-ring seals. Use with incompatible fluid
may cause o-rings to swell which may cause glass tube to fail.
• Plastic fittings are not suitable for gas applications.
• 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
To minimize down time, 7430 Series metering tubes are designed
to be removed without uninstalling flowmeter from piping system.
Meter should be drained prior to maintenance.
Carefully remove the flowmeter from the piping system. Remove the
front shield and the top frame plug. Insert a 5/32” hex key through the
top hole of the frame 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.
Valve Models: Remove valve from the bottom end fitting using a
7/16” open ended wrench. Disassembly of valve is not recommended.
Outer valve o-ring should be replaced during meter maintenance
and cleaning. Prior to reinstalling valve, apply blue Loctite R to valve
threads and a silicone based lubricant onto o-rings.
Non-Valve Models: Remove valve orifice plug from bottom end fitting
by inserting a 3/16” hex key through the back of the end fitting and
into the plug. Turn clockwise to remove it.
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 5/32” 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. Re-install the frame orifice plug. Re-install
valve assembly or valve orifice plug. Replace shield by snapping it
into place.
REPAIR
7430 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
BL FLOAT
TOP FRAME PLUG
FRAME ASSEMBLY
RETAINING NUT
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.
6) Meters with stainless steel fittings will support several feet of pipe
as long as significant vibration or stress resulting from misaligned pipe
are not factors.
GLASS TUBE GASKET
TUBE ADAPTOR
GLASS METER TUBE
END FITTING PLUG
SCALE PLATE
FLOAT STOP
SEAT BUSHING
MOUNT SCREW
TOP FRAME PLUG
O-RING
GLASS TUBE GASKET
SEAT BUSHING
COMPRESSION SCREW
TUBE ADAPTOR
FLOAT STOP
FRAME ASSEMBLY
RETAINING NUT
GLASS METER TUBE
FLOAT
SCALE PLATE
SCALE PLATE
VALVE ASSEMBLY
SCALE PLATE
SHIELD
SHIELD SPACER
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
Lowest meter
capacity or
medium capacity
with low viscosity
fluids
SCALE PLATE MOUNT
SCALE PLATE SCREW
SCALE PLATE
SHIELD
FLOAT
2X
2X
SCALE PLATE
MOUNT SCREW
2X
2X
SCREW
MOUNT
Maximum Non-Shock
Pressure and
Temperature
O-Ring
Temperature
Viton and Kalrez are registered trademarks of DuPont Dow
Elastomers.
EPR
225 °F
Buna-N
Viton
Kalrez
275 °F
350 °F
400 °F
200 psig
Ambient
temperature
33° F - 125° F
O-Ring
Material
Maximum
Temperature
200°F (Liquid)
250°F (Gases)
Temperature
Pressure
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.
To minimize down time, 7430 Series metering tubes are designed to be removed
without uninstalling flowmeter from piping system. Meter should be drained prior
to maintenance.
7430 meters that require repair should be sent to the factory. Please call for a
Return Merchandise Authorization (RMA) number and return instructions.
-7430 Series meters have o-ring seals. Use with incompatible fluids may cause
o-rings to swell which may cause glass tube to fail.
-Plastic fittings are not suitable for gas applications.
-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
1
8
" hex key through the top hole of the frame 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
1
8
" 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. Re-install the frame orifice plug. Re-install valve assembly or valve
orifice plug. Replace shield by snapping it into place.
Valve Models: Remove valve from the bottom end fitting using a
7
16
" open ended
wrench. Disassembly of valve is not recommended. Outer valve o-ring should be
replaced during meter maintenance and cleaning. Prior to reinstalling valve, apply
blue Loctite to valve threads and a silicone based lubricant onto o-rings.
R
Non-Valve Models: Remove valve orifice plug from bottom end fitting by inserting
a
3
16
" hex key through the back of the end fitting and into the plug. Turn clockwise
to remove it.
-OUTLET VALVE SIMILAR
7430 Series
Hastelloy / Monel / Stainless Steel
Maximum Non-Shock Pressure and Temperature
Temp
Pressure
Liquid
200° F
200 (SS)
130 psig (PVC)
Gas
250° F
150 psig (PVDF)
Ambient Temp. 33° F -125° F