Orbital Piston PD - Multipulse Medium Capacity Positive Displacement Flowmeters
Principle of Operation
The Liquid enters into a precision machined chamber which contains an oscillating piston. The positioning of the piston divides the chamber into compartments containing an exact volume. The liquid pressure causes the piston to oscillate and rotate its centre hub. The movements of the hub are sensed through the meter wall by a series of magnets. Each revolution of the piston hub is equivalent to a fixed volume of liquid, which is indicated as flow by an indicator or totaliser. Close clearances between the piston and the chamber ensure minimum slippage of the liquid for highly accurate and repeatable measurement of each volume cycle.
Features
- Flows: 0.2~330 litres/min ( 0.05~90 US gal/min )
- Sizes: 15, 20, 25, 40 & 50mm ( 1 /2”, 3 /8”, 1”, 11 /2”& 2”) connections
- High accuracy & repeatability, direct reading flowmeter
- No requirement for flow conditioning ( straight pipe runs etc. )
- Intrinsically safe & explosion proof models available
- Quadrature pulse output option & bi-directional flow
- Single moving parts
Calibration – PD Flowmeters
All Trimec Flow Products positive displacement (PD) flowmeters are flow tested and each is supplied with an individual calibration certificate. Calibration is traceable to the National Measurements Institute (NMI) Australia. PD flowmeters, due to their application on a wide range of liquid viscosities, are calibrated at one point, multipoint calibration for PD meters is available on request at an additional charge.
Trimec Flow Products Orbital Piston Models & Specifications
| MP015 | MP020 | MP025 | MP040 | MP050 | |
| Pipe Size & Materials |
15mm (1/2")
Aluminium & Stainless
|
20mm (3/4")
UPVC Only
|
25mm (1")
Aluminium & Stainless
|
40mm (1 1/2")
Aluminium & Stainless
|
50mm (2")
Aluminium & Stainless
|
| Flow range (litres /min) | 0.2~10 | 2~50 | 2~50 | 4~140 | 12~330 |
| Flow range (USG / min) | 0.05~2.7 | 0.5~13 | 0.5~13 | 1.1~37 | 3.2~90 |
| Accuracy | *+/- 1% o.r. | +/- 0.5% of reading | |||
| Imporved accuracy | +0.2% or rate with optional NL correction | ||||
| Repeatability | typically + 0.03% | ||||
| Temperature range | -40°c ~ +200°c | ||||
| Maximum pressure (threaded meters) | bar (PSI) | ||||
| Aluminium | 30 (440) | - | 60 (870) | 30 (440) | 20 (300) |
| 316L stainless | 100 (1500) | - | 60 (870) | 60 (870) | 30 (440) |
| High pressure stainless | 350 (5150) | - | 150 (2175) | 150 (2175) | - |
| UPVC (SAP Meters) | 4 (60) | ||||
| Protection class | IP66/67 (NEMA4X), optional Exd IIB T4 / T6 or I.S | ||||
| Recommended filtering | 150 microns (100 mesh) minimum | ||||
Electrical - for pulse meters (see also option outputs)
| Outut pulse resolution | pulses / litre | ||||
| Reed switch | 200 (760) | 20 (76) | 20 (76) | 7.3 (28) | 2.5 (9.5) |
| Hall effect | 400 (1250) | 100 (380) | 100 (380) | 44 (167) | 20 (76) |
| Reed switch output ** | 30Vdc x 200mA max. | ||||
| Hall effect output (NPN) | 3 wire open collector, 5~24Vdc, 20mA max. | ||||
* Within nominal spans of MP015 (0.2~1.7, 1.7~5 & 5~10 litres/min)
Orbital Piston Meter Selection
Selecting the right meter for your application. Meters are selected based on flow range, pressure, temperature, material compatibility, and functionality.
MP015
The Trimec MP015 Series Positive Displacement Flowmeter can be threaded, flanged, or hygienic with a nominal flow range of 10 to 600 lph (2.6 to 160 USgal/hr)
- Threaded, flanged, or hygienic process connections
- Explosionproof or intrinsically safe operation
- Integral or remote self-powered
- flow rate-totaliSer with a scaled pulse, analog, and flow alarm outputs ( see separate data sheet )Integral or remote high speed
- preset batch controller ( see separate data sheet )
MP025
The Trimec MP025 Series Positive Displacement Flowmeter is performance independent of flow profile or mounting orientation.
- Threaded, flanged, or hygienic process connections
- Explosionproof or intrinsically safe operation
- Integral or remote self-powered flow rate-totaliser with a scaled pulse, analog, and flow alarm outputs ( see separate data sheet )
- Integral or remote high-speed preset batch controller ( see separate data sheet )
MP040
The Trimec MP040 Series Positive Displacement Flowmeter is adaptable to hygienic applications with both open collector and reed switch outputs as standard.
- Threaded, flanged, or hygienic process connections
- Explosionproof or intrinsically safe operation
- Integral or remote self-powered flow rate-totaliser with a scaled pulse, analog, and flow alarm outputs ( see separate data sheet )
- Integral or remote high-speed preset batch controller ( see separate data sheet )
MP050
The Trimec MP050 Series Positive Displacement Flowmeter measures low and high-viscosity liquids up to 1,000,000 centipoise
- Threaded, flanged, or hygienic
- process connections
- Explosionproof or intrinsically safe
- operation
- Integral or remote self-powered
- flow rate-totaliser with a scaled pulse, analog, and flow alarm outputs ( see separate data sheet ) Integral or remote high speed
- preset batch controller ( see separate data sheet )
The Multi-pulse range of Flow Meters applications include:
- alcohols
- acetic acid
- caustic soda
- ethanol
- fuels
- grease
- glucose
- ink
- insecticides
- latex emulsions
- liquid sugar
- margarine
- mayonnaise
- molasses
- resin
- tallow
- urethane
- water
- xylene & liquid yeast.