Flow Measurement
Metal Tube Variable Area Flow Meter
MT28
MT28 Metal Tube Variable Area flow meters are suitable for the flow metering and flow consumption of liquids, gases and vapour, and operate on the float principle. The MT28 measuring section features a tapered metal tube in which a suitably shaped float is allowed to move freely up and down. Depending on the flow rate, the float will assume a certain vertical position in the measuring section. The float position is transmitted by magnetic coupling to the scale on the indicator. The flowmeters are particularly suitable for difficult application, operating and environmental conditions.
Features / Benefits
- Various wetted materials are available (Stainless steel, PTFE and Hastelloy C) for process mediums.
- Die-cast aluminum housing with epoxy paint for indicator housing (IP65), also optionally available in stainless steel.
- Vertical, horizontal & side mounted version for special installation positions.
- Modular rack housing accommodate all electrical functions and scale plate, modules of electrical options can be replaced or retrofitted without interrupting the process.
Special Options:
| Limit Switches, L | • 2 limit switches • Adjustable on the scale (Can be retrofitted) |
| Electrical Current Output, CUR | • Non-interacting and hysteresis-free conversion of the flow value into a scaled current output, 4-20 mA with HART |
| Flow Totalizer, FT | • Used in conjunction with CUR |
| High Temperature, HT | • Meter with built-in electrical components is mounted on extended spacers if process temperature should exceed the max. allowable level |
| Inlet Needle Valve, TE | • Connected at the inlet of flow meter • Used for on-off, throttling and regulating purpose |
| Outlet Needle Valve, TA | • Connected at the outlet of flow meter • Same purpose as TE |
| Inlet Differential Pressure, IR | • Help to maintain a constant flow rate at variable inlet pressure |
| Outlet Differential Pressure, OR | • Help to maintain a constant flow rate at variable outlet pressure |
Applications
- For liquid (both conductive and non-conductive) and gas measurement
- MT28 is particularly suitable for difficult applications and tough environmental conditions.
For example:
High temperature, high pressure as well as corrosive environment. Can be used in all industrial sectors, such as:
High temperature, high pressure as well as corrosive environment. Can be used in all industrial sectors, such as:
- Chemical
- Waster / Wastewater
- Marine / Offshore
- Pulp and Paper
- Pharmaceutical
- Food and Beverage
- Oil and Gas
Specifications
Flow Meter
| Measuring Range (100% Value) | Water (20°C): 25 to 100 000 l/h Air (1.03 bar abs. 20°C): 0.7 to 600 m3/h | |
| Turndown Ratio | 10:01 | |
| Accuracy Class | 1.6 (VDI/VDE Code 3513, Part 2) | |
| Flow Scale | Flow units | |
| Ambient Temperature Ta | -40°C to +120°C | |
| Max. Process Temperature | MT28/SS, MT28/HC: -80 °C to +300°C | |
| Tp Without built-in electrical option | MT28/PT : -80°C to +70°C | |
| Max. Process Temperature Tp With Built-in Electrical Option | Refer to Sales | |
| Test Pressure PT (Pressure Tested) | The test pressure is calculated in accordance with pressure equipment directive (97/23/EC) and/or AD 2000-HP30, in compliance with the maximum allowable operating pressure and the maximum operating temperature | |
| Meter Size | DN15 to DN100 and ½” to 4” | |
Connection
| Flange | DIN2501 DN15 – 100, PN16 – 250 ANSI B 16.5 ½” – 4”, 150 – 2500 lbs JIS B 2238 15 – 100, 10 – 20K | |
| Thread | ISO 228 G½” – G1” ANSI B1.20.1 ½” – 1” NPT >50 bar | |
| Sanitary | Tri-Clamp ISO 2852 Size 25 -139, 10 – 16 bar SMS 1146 1” – 4″, 6 bar DIN 11851 DN15 – 100, 25 – 40 bar | |
Material
| Flanges | SS316L (1.4404) (Standard) Hastelloy C | |
| Wetted Parts | SS316L (1.4404) (Standard) Wetted Parts SS304 (1.4301) with PTFE liner Hastelloy C | |
| Housing | Die cast aluminum with epoxy paint Optional: Stainless steel housing | |
| Measuring Tube | Metal tube with tapered measuring section | |
Overall Height
| Standard for Flange & Sanitary Connection | 250 mm | |
| Standard for Thread | 300 mm | |
| Protection Category | IP65, NEMA 12 & 13 | |
Note: Specifications are subject to change without notice
- Higher pressure rating and other types of connection available on request
- Non-standard lengths can be customized to suit existing piping dimensions
