Kurz

Mass Flow Computers

Series 155 Adam Mass Flow Computer/Transmitter The Series 155 “Smart” Mass Flow Computers are state-of-the-art, microprocessor-based, versatile system transmitters that work in conjunction with a number of our element instrumentation. Product Compatibility The various models operate one or more Kurz Mass Flow Elements including Series 452, 502, 522-UHP, K-BAR 16, K-BAR 24, K-BAR 2000, the Series IK-4200 Isokinetic Sampling Probes and the Series 730 Mass Flow Control Valves . The Series 155 may also be used with the new MFT Series of Mass Flow Transmitters (454FT, 504FT, 534FT, K-BAR 2000) as a convenient power supply, display and Mass Flow Computer for remote sensor electronics applications. Key Features Easy-to-use menu for display and set-up with Help screens Two-line 16 character LCD (Liquid Crystal Display) 20 button keypad (built-in terminal) 24 hour clock/calendar, Y2k compliant Up to 22 sensor inputs; mass flow rate, temperature and 4-20 mA reference inputs Ability to group one or more inputs as a METER and to define a METER as the sum/difference of other METERS, up to a maximum of 16 METERS Up to eight 0-5 VDC or 4-20 mA outputs Mass flow computer redundancy using two Model 155’s for unsurpassed reliability Up to eight 5-amp alarm relays English or Metric units Multi-Point calibration factor for each METER

Mass Flow Control Valves

The Series 730 valves are unique electrically-actuated loop-powered flow control valves. Unlike conventional electrical control valves, the Series 730 combines the electric drive motor, rotor, the valve body, and limit switches into a well-designed, integrated package.
The flow coefficient is nearly linear over a wide range due to its nearly 300° rotation between shut-off and full-open. The typical turn-down ratio is 50:1. Because of its rotary operation abrupt pressure changes do not affect the Series 730 nearly as much as conventional pneumatic control valves. A remarkable aspect of the 730 is its incorporation of a pressure-assisted shut-off feature which greatly improves the turndown ratio. The standard valve incorporates a high-torque DC gear motor; designed to be operated by any of the Series 155 Mass Flow Computers. The standard close-to-open time is 20 seconds. The standard allowable working pressure is 150 PSI and the temperature rating -40°C to +125°C.0

730 Series Mass Flow Control Valves
General Overview
The diameter, separation and the helical depth were designed to provide a nearly linear flow coefficient (Cv) with angular rotation. A simple high torque gearmotor (24 VDC) was selected for cost and simplicity. Since the Series 730 is a “fail-as-is” design, the motor is only used when changes are required, which greatly extends the motor life. The Series 730 combines the electric drive motor, the valve body, rotor and limit switches into a well-designed, integrated package. The typical turn-down ratio is 50:1, due to the incorporation of a pressure assisted shut-off disk which becomes active near the shut-off position. The Cv range is from 0.05 to 10.0 in three convenient body sizes.
The Series 730 is constructed of 316L stainless steel, with Viton O’Rings and an o’ring sealed motor cover. It operates as a two-wire loop-powered device normally powered and controlled by one of the Series 155 Mass Flow Computers and used with a Kurz In-Line Mass Flow Element. The inlet and outlet fittings are Schedule 40 pipe with MNPT end connections or Class 150 flanges. Because of its rotary design, the Series 730 is not as affected by abrupt line pressure changes as are pneumatic control valves.

Applications State-Of-The-Art Air Sampling Systems Chlorine metering Petrochemical plants Semi-Conductor Process Gas Blending Control of Argon and Helium in welding Pilot plants Aluminum and Steel IndustryKey Features Rugged integrated design 2-wire, loop-powered 316L SS construction High Repeatability (±.25%) Pressure rating:150 PSIG Temperature rating of -40 to +125°CStandard open-to-close time of 20 seconds (Faster is optional) Meets nuclear requirements for seismic and environmental Good shut-off capability

Isokinetic Sampling Systems

Custom by any measure, IsoKinetic sampling systems combine high accuracy mass flow measurement in the process with effective sampling nozzles and fine control and measurement of the sampling rate, so that you can be assured that your constituent reporting is correct and accurate. Widely used at Department of Energy (DOE) Nuclear, and Defense facilities, IsoKinetic sampling assures that you collect a truly representative sample of the gas/emission.
A complete Kurz Sampling System usually includes the following Kurz components:
Custom by any measure, IsoKinetic sampling systems combine high accuracy mass flow measurement in the process with effective sampling nozzles and fine control and measurement of the sampling rate, so that you can be assured that your constituent reporting is correct and accurate. Widely used at Department of Energy (DOE) Nuclear, and Defense facilities, IsoKinetic sampling assures that you collect a truly representative sample of the gas/emission.
A complete Kurz Sampling System usually includes the following Kurz components:

•One or more Multi-Point Series 220 Sampling Rakes each having single or dual independent sample rakes.Series 220 MJ Sample Manifold Junctions.
•K-BAR 2000B Multi-Point Insertion Mass Flow Element(s) for measuring the duct/stack average velocity and flow rate.
•Series 534FTB In-Line Mass Flow Elements for measuring the sample flow rates.
•Series 730 Mass Flow Control Valves for sample flow rate control.
•Series 155 Mass Flow Computer which provides the power, signal conditioning and automatic isokinetic constant sample flow control or manual control of single or dual sample flows, and operates all of the flow elements and control valves. The user may set up constant flow control, isokinetic flow control, sub-isokinetic flow control or manual flow control.
•Enclosures, Manifold Junctions, Vacuum Pump Systems, mounting hardware, particle loss calculations, and all parts needed for a complete system.

220 Isokinetic Samplings Systems The Series 220 has major advantages over traditional sampling systems. The Series 220 incorporates the unique Kurz Axial Flow-Low Particle Loss sampling nozzle design, developed especially for the DWPF at Savannah River Site. Rather than use a single “shrouded nozzle” as suggested by ANSI N13.1-1999, we use our low-loss axial flow nozzles to achieve the same objective—lower particle loss. Kurz believes its’ approach is more realistic, as a single nozzle can “miss” accident conditions n which large particles penetrate the upstream HEPA filters at the seals or any other location. The main difference between the operation of a single-point shrouded nozzle versus the Kurz Series 220 Multi-Point Sample Rakes, is that the shrouded nozzle is normally used with a manually controlled constant sample flow rate (which is questionable at low stack flows) and the Kurz Series 220 Multi-Point Sample Rakes are operated with the sample flow rate proportional to the stack flow rate, either by using the Kurz Automatic Flow Control System or manually controlled.