Liquid Flow Calibration
ISO 17025 Certified and NIST traceable Liquid Flow Calibration Services by Graftel
| Rotometer Calibration for Liquids up to 500 GPM | Liquid Flowmeter Calibration up to 500 GPM | Turbine Flowmeter Calibration up to 500 GPM |
|---|---|---|
 |
 |
 |
| Sonic Nozzle and Sonic Choke Calibration | ||
 |
||
500 GPM 17025 Accredited NIST traceable liquid flow calibrations now available
Graftel maintains four NIST traceable primary liquid flow calibration systems utilizing water as the calibration medium. Each systems uses a high accuracy Coriolis meter as a secondary standard and its own gravimetric time-mass system as a primary standard. These four systems cover overlapping ranges so that they may be checked against each other.
Liquid Primary A
The system's flow rate range is 0.001 to 0.5 gpm, (0.001 to 1.89 slpm). The pressure range is 0 to 1000 psig, (0 to 69 bar). The best measurement capability is 0.06% of reading.
Liquid Primary B
The system's flow rate range is 0.05 to 16 gpm, (0.189 to 60.8 lpm). The pressure range is 0 to 1000 psig, (0 to 69 bar). The best measurement capability is 0.06% of reading.
Liquid Primary C
The system's flow rate range is 1 to 100 gpm, (3.8 to 380 lmp). The best measurement capability is 0.06% of reading.
Liquid Primary D
The system's flow rate range is 50 to 500 gpm, (190 to 1900 lmp). The best measurement capability is 0.10% of reading.
Rotometer Calibration in liquids and gases ISO 17025 and NIST traceable
Rotameters are a gauge that consists of a graduated glass tube containing a free float for measuring the flow of a fluid or gas. Usually a rotameter will have a tube that holds a pellet or cylinder that will move up the scale according to the pressure from the gases or liquids it is measuring.
Slotted Tube Rotameters - This unit uses a slotted cylinder and piston rather than a tapered tube. This piston portion of the meter float travels within the cylinder, the piston acting as the fourth side of the slot. As with standard tapered tube meters, the fluid flow raises the piston until sufficient slot area is exposed to bring about your final measurement.
Vane type Rotameters and Piston type Rotameters - Another type of flowmeter that has a tapered interior chamber that allows a fitted piece to raise or lower into the unit to measure flow.
During its use, a rotameter will accumulate foreign material inside and will eventually lose its sensitivity to measurement. In many cases, a yearly rotometer calibration will keep your measurements accurate and save you time and money in maintenance. Graftel's, calibration lab has calibrated Rotameters from dozens of manufacturers, and we have established yearly rotometer calibration schedules with many of our clients. listed below are several that we have calibrated to NIST accuracy and ISO 17025.
As for services, Graftel can have your liquid or gas Rotameter calibrated and returned to you in 5 business days or less! Graftel also offers ISO 17025 Gas-flow calibrations for your rotometer that are NIST traceable. For more information about our ISO 17025 calibration capabilities, feel free to read our certificate and scope or contact us with your questions.
- Dwyer Instruments VA Series Rotometers
- Omega Instruments FL Series Rotometers
- Universal Flow Instrument Rotameters
- Brooks Instrument Rotameters
- Meter Equipment Manufacturing Rotameters
- Cole Parmer Rotameters
- King Instruments Rotometers
- Blue-White Rotometers
- Kytola Rotometers
Contact Us today if you have a rotameter that needs a NIST traceable ISO 17025 calibration.
Sonic Nozzle and Sonic Choke Calibration and manufacturing services
Graftel has become a reseller and calibration source for Fox Valve! This means that we can now bring your calibrated sonic nozzles and calibrated sonic chokes at a very competitive price! Contact a Graftel Representative today to receive a quote on a calibrated sonic choke! Fox valve also is a manufacturer of:
- Venturi Flow Controls - Includes all venturi products used to measure or regulate flow rates.
- Fuel Cell Ejectors - Fox venturi ejectors have been used in fuel cells since 1985.
- Natural Gas Vapor Recovery Ejectors - The use of Fox ejectors range from small sampling mini-eductors to five-stage vacuum systems.
- Solids Conveying Eductors - for pneumatic conveying of powders, pellets, and bulk solids.
Critical flow nozzles, also called sonic chokes, have been used to maintain stable gas flow rates in systems where maintaining stable, accurate gas flow rates is essential to overall system performance. By establishing a shock wave in the venturi, the sonic choke establishes fixed flow rates unaffected by P or any fluctuations, surges, or changes in downstream pressure. With no moving parts, sonic chokes provide the simplest and most reliable way to regulate gas flows. This is particularly true when high pressure, high temperature, cryogenic, explosive, or high purity gasses need to be regulated.
Industry uses many different names to describe this equipment. Here is a partial list of descriptions that can be used interchangeably:
- Sonic chokes
- Laval Nozzles
- CVM (Critical Venturi Meters)
- Sonic nozzles
- Critical Flow Venturies
Sonic chokes are converging/diverging nozzles whose operating principles are discussed in every fluid mechanics textbook. They offer the designer a remarkably simple way to regulate stable gas flow rates.
Contact a Graftel Representative today to learn more about purchasing a Calibrated Sonic Choke or Sonic Nozzle.