Piston Positive Displacement Flow Meter

Design Principle

The TCS 682 reciprocating piston flow meter is a true positive
displacement meter that has a unique inline design consisting
of three reciprocating pistons operating within their respective
measuring chambers. Each piston works in a manner similar to
an automobile engine. The pistons are fitted to a wobble plate,
which has a shaft extending from its upper surface and a valve pivot
attached beneath it.

The valve pivot drives a sliding valve from piston to piston as a
known amount of product flows through each cylindrical bore,
controlling the sequence of events in a smooth mechanical motion.
This smooth mechanical motion is then transferred through the
drive shaft to the register.

Performance Features

The TCS 682 reciprocating piston flow meter combines outstanding accuracy (0.1% of flow rate) with one of the widest turndown
ratios in the industry (250:1). The TCS 682 reciprocating piston flow meter has a rugged industrial design that is tolerant to changing
viscosities, temperatures and liquids with suspensions and solids. This proven design has over 80 years of unmatched performance and
continues to provide the very best in flow measurement, backed by our industry leading 10 year warranty (5 year warranty LPG)!

FLOW RANGE: 0.2 to 50 GPM (0.76 to 189 LPM); 250:1 Turndown Ratio
LP Flow Rates: 2 to 50 GPM (7.5 to 189 LPM); 25:1 Turndown Ratio
LINEAR ACCURACY: Capable of ± 0.1% over the full flow range
REPEATABILITY: Capable of 0.01%
OPERATING PRESSURE: Up to 150 PSI (10.5 BAR); 350 PSI (26 BAR) on LP meter type
TEMPERATURE RANGE: -40°F to 160°F (-40°C to 71°C)
VISCOSITY RANGE: Will accurately measure liquids up to 50,000 SSU (11,000 CPS)
CONNECTIONS: 1-1/2” NPT Companion flanges are standard, 1” & 2” NPT optional. BSPT, slip weld, and ANSI flanges
are available upon request.
REGULATORY: NIST, OIML, NMI, SABS, S. WA and other global regulatory approvals. (Contact factory for information
on specific approvals.)