The DK32/34 is a variable area (VA) flowmeter for measuring low flow rates of liquids and gases. The tried and tested meter is particularly suitable for flow monitoring and dosing in gas analyser systems or on purge panels. Due to its robust all-metal design it can also be used in difficult process conditions with temperatures up to +200°C / +392°F or pressures up to 400 barg / 5800 psig. It is available with a metering valve as standard to accurately set the flow value.
The DK32/34 operates without auxiliary power supply. It features a local indication with optional MIN/MAX limit switches (NAMUR), a reed contact or analogue output (4…20 mA). To provide constant flow rates in case of variable inlet or outlet pressures, the VA meter is also available with flow regulators. It comes with horizontal or vertical process connections for NPT or G thread, flange adapters and many other connection options. The VA meter has various approvals for hazardous areas and is suitable for use in Safety Instrumented Systems (SIS).
- Simple, low-cost installation: Able to measure and display without auxiliary power supply
- Purgemeter with 2 optional limit switches for flow monitoring
- Various stainless steel and alloy sensor materials
- Optional surface passivation with SilcoNert®2000 for trace-level analysis
- Ingress protection IP65/66
- Full scale value for liquids: 1.6…150 l/h / 0.4…40 GPH
- Full scale value for gases: 16…4,800 l/h / 0.6…170 SCFH
- Turndown ratio 10:1
- Maximum measuring error: ±4% (acc. to VDI/VDE 3513-2) or ±3% of full scale
- Suitable for use in Safety Instrumented Systems with SIL 2, in redundant design (1oo2) also in SIL 3 applications (type A device)
- Approved for hazardous areas
General information
| Product type | Flowmeter |
| Product family name | DK |
| Product positioning | For low liquid and gas flows |
| Measurement principle | Variable area float |
| Measured media | Liquids, Gases |
Operating conditions
| Process pressure | max. 220 barg/ 3190 psig |
| Process temperature | -40…+200°C/ -40…+392°F |
Materials
| Measuring tube | Austenitic stainless steel (1.4404/316L), Austenitic alloy (2.4610/Alloy C4), Nickel alloy (2.4360/Alloy 400), Titanium alloy (3.7035/Ti-Grade 2), Nickel-chrome-molybdenum-tungsten alloy (2.4819/Alloy C276), Nickel-chromium-molybdenum-niobium alloy (2.4856/Alloy 625), Passivation with SilcoNert®2000 |
| Gaskets | Polytetrafluoroethylene (PTFE), Perfluoroelastomer rubber (FFKM), Fluoroelastomer rubber (FPM), DK34: none |
| Process connection | Austenitic stainless steel (1.4404/316L), Nickel alloy (2.4360/Alloy 400), Austenitic alloy (2.4610/Alloy C4), Nickel-chrome-molybdenum-tungsten alloy (2.4819/Alloy C276), Nickel-chromium-molybdenum-niobium alloy (2.4856/Alloy 625), Titanium alloy (3.7035/Ti-Grade 2), Passivation with SilcoNert®2000 |
Process connections
| Flange connections | EN (1092-1): DN15…25 ASME (B 16.5): ½…1″ |
| Thread connections | Female: G¼ ¼ NPT, ½ NPTOthers: Tube fittings |
| Other connections | Swagelok;Serto, Ermeto; Hose; Gyrolok |
Approvals/Standards
| Certificates/Approvals Others | CRN, NACE |
| Certificates/Approvals Ex | ATEX, cQPSus, IECEx, NEPSI, EAC Ex, INMETRO, KCs, JPNEx |
| Certificates/Approvals Nuclear | Nuclear qualification on request (e.g. acc. to ASME III, RCC-M/E, etc.) |
| Certificates/Approvals Safety | SIL 2 |
Communication
| Analogue outputs | 4…20 mA |
| Discrete outputs | Limit switches |
| Digital outputs | HART® |
Chemical and other process industries
- Additives (e.g. catalysts, tensides, foam inhibitors, emulsifiers)
- Acids, bases, phosgene and other chloridic substances, sulphuric substances
- Condensate and cooling water
- Nitrogen inertisation of vessels and tanks
- Sample flow monitoring in gas analysers
- Gas sparging in liquids
Oil and gas industry
- Injection skids for corrosion-, scale- and hydrate-inhibitors
- Nitrogen, flue gases etc.
- Sample flow monitoring in analyser systems
Machinery and apparatus (OEM industry)
- Gas seal monitoring for compressors
- Coolants and cooling water, lubricants, air supply
- Dry-run prevention of pumps
- Dosing of chemicals and gases in laboratories and test facilities
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