TCS900004, Rev.4
07/12/2016
Check us out at
www.TCSmeters.com
Page 8
Thermal Shock
The metal parts within the flow meter will expand or contract with variations in the system operating temperature.
For any systems where
sudden or immediate temperature increases of 68 F (20 C) degrees or more are
possible, the meter will require clearance rotors. The extra clearance will be necessary to eliminate the
effects of immediate expansion of the rotors vs. the meter body, caused by thermal shock.
Hydraulic Shock (Water Hammer)
Hydraulic shock is a rise in pressure, which happens when an operating system undergoes an immediate
change in flow direction. This is most often the result of a rapid valve closure while the system is
operating at a high flow rate. Hydraulic shock can damage any system component. Particularly
susceptible are internal components of the meter, valves, and pump. System design and improper
operating procedures will contribute to the seriousness of this problem. In order to eliminate hydraulic
shock, the valve closure rate must be slowed. The use of 2
-
stage preset control valves or surge
suppressing bladders or risers will help reduce or eliminate this problem.
Products that Dry/Congeal/Crystallize
There are many liquids that crystallize, harden and/or solidify on contact with air or with an increase in
temperature. A proper system design and a good understanding of the product being measured will help
to avoid the possibility of air entering into the system and the product and effective operation of the meter
being affected.
Calibration
The meter shall be tested and calibrated with the product it is intended to measure when installed. Total
Control Systems shall not be responsible for loss of product or any damages resulting from the end user’s
failure to test this meter to insure proper calibration. Every 700 series meter is tested at the factory to
prove that the meter can be calibrated in your system. It is the owner’s responsibility to report this device
to the local Weights and Measures officials for their inspection before the meter is put to use.
System Recommendations (Continued)
