Meter Overview; Meter Specifications; Material Of Construction - Total Control Systems 700-LP Series Installation, Operation & Maintenance Manual

Meter Overview

The TCS Model 700-LP series flow meter reflects a simple and efficient
design for application on liquefied petroleum gas (LPG). The meter consists
of a single fluid chamber that contains a single blocking rotor and two
displacement rotors whose rotation is synchronized with mating gears. As the
fluid enters the fluid chamber, the blocking rotor is forced to rotate. The
displacement rotors, also rotating in conjunction with the blocking rotor help
direct the fluid flow through the chamber and to the outlet. The linear flow of
the fluid is thus translated into rotary motion in the meter. The output of the
meter is picked up from the rotation of the blocking rotor and transmitted to a
register or pulse transmitter.
The rotors in the meter are designed to operate at close tolerances to one another and the wall of the fluid chamber.
There are slight clearances between the rotors and the chamber wall. Because of this, it is important that the meter
be properly applied for the flow rate and operating pressure of the system.
Because the fluid flowing through the meter is redirected only slightly from its natural flow, there is very little
pressure drop across the meter, unlike other meters that use multiple measuring chambers.
The meter design uses high performance materials for the rotor bearings and journals. Since there is no contact be-
tween the rotors and the fluid chamber wall, these critical components have a long life expectancy.
Calibration of the meter involves adjusting the rotation of the output shaft relative to the rotation of the internal ro-
tors of the meter. This is accomplished by changing the settings on an adjuster device. Calibration of the meter is
discussed in detail in the section Meter Calibration.
Meter Specifications & Materials of Construction
Flange Connection:
Flow Rate:
Maximum Pressure:
Working Temperature:
Materials of Construction:
2‖ NPT Flanges, Standard; 1-1/2‖ NPT Flanges, Optional. BSPT or Slip Weld
flanges available upon request.
100 GPM (380 LPM), max flow
350 PSI (24 BAR)
-40 F to 160 F (-40 C to 70 C)
Housing & Rotors: Anodized Aluminum; Bearing Plates: Ni-Resist II; Bearings:
Antimony carbon graphite; Gears: Stainless Steel; Seals: UL recognized Buna-N
FLOW ILLUSTRATION
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