DK800
Variable area flowmeter with glass cone and 125 mm / 4.92″ installation length
- For flows ≥2.5 l/h or 0.65 GPH
- MIN/MAX flow monitoring (SIL 2 conform acc. to IEC 61508-2)
- Integrated needle valve
- Measuring uncertainty: ±2.5% (acc. to VDI/VDE 3513, sheet 2)
- Optional limit switches, flow regulator, panel mount
Overview
The DK46/47/48/800 is a variable area (VA) flowmeter for monitoring and adjusting extremely small flow rates of liquids (from ≥0.04 l/h or ≥0.1 GPH) and gases (from ≥5 Nl/h or 0.22 SCFH). It is thus particularly useful for sample flow monitoring in analyser systems and gas chromatographs or measuring liquids and gases in laboratories and pilot installations. Blinds and supports are available for panel mounting to purge panels or similar applications. By using a lab support, the flowmeters can be converted into a desktop unit.
The purgemeter operates without auxiliary power supply and is available with different glass tube and installation lengths from 90 to 325 mm / 3.55 to 12.8″. The medium is visible and the flow value can be read directly off the scale at the height of the float. The glass flowmeter can be provided with max. two limit switches (NAMUR) or a 3-wire digital output. For precise setting of the flow value, the VA meter features a needle valve. The DK 46/47/48/800 is also available with a differential pressure/flow regulator to provide constant flow rates in case of varying inlet or outlet pressures. The device has approvals for use in hazardous areas.
Product features and options depend on device configuration: Contact us to make sure that your preferred functionality can be combined in one device
- Cost-effective small purgemeter
- Low-cost measuring principle without auxiliary power
- Maximum measuring error: ±1 / ±2.5 / ±4% (acc. to VDI/VDE 3513-2) or ±1 / ±2 / ±3% of full scale
- Fine metering of very small volumes of liquids and gases
- Integrated high quality needle valve in foot or head piece
- Stainless steel, brass or PVDF fittings
- Suitable for use in Safety Instrumented Systems with SIL 2, in redundant design (1oo2) also in SIL 3 applications (type A device)
- No wearing parts
Various industries
- Process or carrier gases
- Purge fluids for measuring systems
- Air or water
- Nitrogen, CO2 or other inert gases
- Sample flow monitoring in gas analysers etc.
- Gas sparging in liquids
Conventional and nuclear power industry
- Air, gases (nitrogen, hydrogen, methane etc.)
- Water
Specifications
General information
| Product type | Flowmeter |
| Product family name | DK |
| Product positioning | For low flow gas or liquid applications and sample flow monitoring |
| Measurement principle | Variable area float |
| Measured media | Liquids, Gases |
Operating conditions
| Process pressure | max. 10 barg/ 145 psig |
| Process temperature | 0…+100°C/ -40…+392°F |
Materials
| Measuring tube | Borosilicate glass |
| Gaskets | Ethylene propylene diene monomer (EPDM), Polytetrafluoroethylene (PTFE), Perfluoroelastomer rubber (FFKM), Fluoroelastomer rubber (FPM) |
| Process connection | Austenitic stainless steel (1.4404/316L), Polyvinylidene fluoride (PVDF), Nickel-plated brass |
Process connections
| Flange connections | EN (1092-1): DN15…25 ASME (B 16.5): ½…1″ |
| Thread connections | Female: G¼ ¼ NPT |
| Other connections | Swagelok;Serto, Ermeto; Hose; Gyrolok |
Approvals/Standards
| Certificates/Approvals Ex | ATEX, NEPSI, PESO, UKEX |
| Certificates/Approvals Nuclear | Nuclear qualification on request (e.g. acc. to ASME III, RCC-M/E, etc.) |
| Certificates/Approvals Safety | SIL 2 |
Communication
| Discrete outputs | Limit switches |