The Smith Meter Model ST-40 is a DN50 (2-inch), single-case, straight-through rotary vane positive displacement meter with a ductile iron housing, widely used on tank trucks and as a line meter for blending, batching, dispensing, inventory control and custody transfer of fuels, oils, solvents and chemicals. Offset inlet and outlet nozzles minimize pressure drop and slippage, the calibrator adjusts in 0.05% steps, and the meter is PED compliant (Ellerbek-built).
Key specifications
Size: DN50 (2 in), straight-through; ANSI Class 150 or DIN PN16 raised-face flanges
Max flow: 85 GPM (320 L/min) continuous; 105 GPM (400 L/min) intermittent; 75 GPM (285 L/min) all-iron trim
Linearity / repeatability: ±0.15% typical over the rated range (minimum flow depends on viscosity) / ±0.02%
Viscosity: 400 mPa·s standard; to 2 Pa·s with high-viscosity clearances
Temperature: -4 to 150 °F standard; to 200 °F high-temp clearances; to 225 °F (Buna) or 300 °F (Viton) all-iron trim; -20 °F at 10 bar optional
Max working pressure: 16 bar (232 psi), ductile iron
Meter gearing: 1 dekaliter per calibrator revolution
Materials: Ductile iron housing; iron, steel, stainless and aluminum internals (all-iron optional); Buna-N standard, Viton optional
Accessories: E-20 strainer (40 mesh standard), deaerator, hydraulic or set-stop valves, ATC/ATG, 200/600 counters, printer, 300C preset counter, GPST-2, LNC and UPT pulse transmitters
How to specify / order
The bulletin gives an ordering checklist rather than a position-by-position model code. Provide the following with your RFQ:
Application: Truck or line metering; batching, loading, blending, inventory, process control
Operating conditions: Liquid name, viscosity (min/max) and gravity; min/normal/max flow; temperature range; maximum working pressure
Units of registration: Liters, dekaliters, gallons, kilograms or pounds
Seals: Buna-N or Viton
Internal construction: Iron/aluminum or all iron
Clearances: Standard, high viscosity or high temperature
End connections: ANSI or DIN
Accessories: Strainer, deaerator, valve, counter/printer, pulse transmitter, ATC/ATG
Pricing and lead time are quoted per configuration. Send the model code (or your application details), product, flow range, and pressure/temperature to Flow Measurement Services for a quote. Specifications summarized from Smith Meter bulletin SS01062E; confirm current data with the factory before ordering.
Smith Meter (formerly FMC Technologies / TechnipFMC Measurement Solutions), now manufactured by Guidant. Flow Measurement Services supplies and services Smith Meter equipment.