7720 Series
Installation Instructions
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 modied. 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.
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 and components (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) 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 teon 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
additionally:
• 7720 Series meters are designed for vertical installation only. (Inlet
at bottom, Outlet at top)
• Do not remove or adjust the screws on the side of the indicator
housing. These screws were positioned during factory calibration
and represent the zero adjustment. If the pointer is set on zero,
proceed with installation. If the pointer is not set at zero, follow
these steps:
1) Remove front cover with gasket from indicator housing.
2) Loosen set screw at the base of the pointer hub.
3) Reposition pointer to zero line.
4) Tighten set screw with a 1/16” allen wrench by holding the
pointer hub and gently tightening the set screws.
5) Replace front cover with gasket on indicator housing.
CAUTION: ZERO IS FACTORY SET WHEN METER IS CALIBRATED.
DO NOT LOOSEN SCREWS THAT FASTEN INDICATOR HOUSING
TO METER BODY. IF INDICATOR HOUSING IS MOVED, THE METER
WILL NEED TO BE CALIBRATED.
When it comes to ow...we’re instrumental.
(714) 891-0008 • www.kinginstrumentco.com
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7720 Series
SHIELD SCREW
SHIELD SCREW O-RING
SHIELD WITH GASKET
INDICATOR HOUSING/
POINTER NEEDLE SET SCREW
FLOAT
END FITTING O-RING
OUTLET END FITTING
ORIFICE HOUSING O-RING
ORIFICE HOUSING/
OUTLET FLOAT STOP
METER TUBE ASSEMBLY ORIFICE ASSEMBLY
HOUSING ASSEMBLY
TAPER SLEEVE
INLET END FITTING
INLET FLOAT STOP
HOUSING ASSEMBLY
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CONFIGURATIONS VARY BY FLOW RATE AND METER SIZE.
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Installation Instructions
Max Non-Shock Pressure and Temperature
Fitting Temp Size
4 and 6
FNPT 130°F Max 150 psig 125 psig
150# Flange 130°F Max 150 psig 150 psig
300# Flange 130°F Max 150 psig 150 psig
caution
• O-rings should be replaced if meter is disassembled
after it has been in service.
• Do not loosen nuts that fasten indicator housing
to metering tube. If the relationship of meter tube
and indicator housing are changed, meter must be
calibrated.
• Serious property damage and great personal injury
could occur as the result of a meter misused or used in
an unsuitable application.
repair
7720 meters that require repair should be sent to the
factory. Please call for aReturn Merchandise Authorization (RMA) number and return instructions.
Size
8 thru 12
7720 series asseMbly
parts list:
1. Shield Screw
2. Shield Screw O-Ring
3. Shield With Gasket
4. Indicator Housing/Meter
Tube Assembly
5. Pointer Needle Set Screw
6. Float
7. Outlet Float Stop Housing
Assembly
8. End Fitting O-Ring
FLANGE
FNPT
9. Outlet End Fitting
10. Orice Housing O-Ring*
11. Orice Housing/ Orice
Assembly*
12. Inlet Float Stop Housing
Assembly*
13. Taper Sleeve*
14. Inlet End Fitting
*CONFIGURATIONS VARY BY FLOW
RATE AND METER SIZE.
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 dicult 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 specic application.
8X
8X
FLANGE FNPT
When it comes to ow...we’re instrumental.
(714) 891-0008 • www.kinginstrumentco.com
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