5
Every meter should be calibrated under actual service and
installation conditions. Follow your local Weights and
Measures recommendations.
Provide a means of conveniently diverting liquid for calibra-
tion purposes.
Give careful attention to your system’s pumping equipment
and piping because of their influence on the liquid being
measured as it enters the meter assembly. Systems should
be made free of conditions that cause or introduce entrained
air or vapor.
Follow the manufacturer’s recommendation fully when in-
stalling pumps. Give particular attention to factors like: use
of foot valves, pipe size to the inlet and conformance to net
positive suction head (NPSH) conditions when suction
pumping is required. Following the manufactures’ recom-
mendations will minimize air and vapor elimination prob-
lems.
Start-Up:
Fill the system slowly to avoid operation on air or vapor.
This can be accomplished in the following manner:
Throttle the meter inlet valve, and allow the meter and pip-
ing to fill slowly by gravity.
Crack open the outlet valve and start the pump, then slowly
open the inlet valve until the system is up to pressure. Open
the outlet valve fully to establish full flow. Check the flow
rate to assure the meter is operating within specified rates.
The meter is not designed to operate on air, but the design
and materials of construction of the TUTHILL meter allows
for operation on vapor for short periods of time without dam-
age to the elliptical gears or other meter internals.
Note: Over- speed and hydraulic shock caused by the
presence of vapor in the system can cause internal
damage to the meter.
Installation & Operation continued
Torque Chart
Bolt Size
Torque (inch-lbs.)
3/8” - 16
2
64
–2
76
5/16” - 18
1
44
–1
56
1/4” - 28
82
–
86
1/4” - 20
72
–
76
M6 -1.0
72
–
76
10 -32
22.1
–
23.3
8 -32
13.4
–
14.1
4 –40
3.9
–
4.1
1/2 –13
620
–
660
Use anti
se
i
ze compound for torqued bolts.
mdi - Manufacturers Distributor Inc. | Phone: (813) 241 - 4900 | Fax: (813) 571 - 0422 | www.FillRitePumpSales.com | [email protected]
