Have a look at this solution:
http://www.sierrainstruments.com/products/240_241.html
The insertion version (241-VT) should do the job if you have enough straight length on you piping.
Paul
Have a look at this solution:
http://www.sierrainstruments.com/products/240_241.html
The insertion version (241-VT) should do the job if you have enough straight length on you piping.
Paul
Use a Insertion Multi Marameter Mass Vortex meter with a Hot-tap system. There are systems available to install these uner "hot" conditions. (see www.sierrainstruments.com model 241)
To do it correct there is only one way of doing it: Take it out and sent it to a company who can verify calibration of these kind of meters: f.i. NMI, The Netherlands, CEESI (USA), Sierra Instruments (USA), NIST (USA), Intromet (Netherlands), PTB (Germany)
Dear Jorge,
Measuring the usage of gas like yours has some special requirements:
1) You need to measure Mass (not temp and pressure dependend like volume)
2) You need a big rangeability (Be able to measure big and small flows)
3) Long term stability (Prefereable no moving parts)
4) Ability to...
Multi variable Vortex meters calculate the Reynolds number and compensate for the "low flow non linearity" of a Vortex meter. I assume that the flow will be relatively low. To obtain a better accuracy in this lower range and to avoid reducing the pipe line to increase velocity you...
I heard that a Insertion Multi variable Mass Vortex is suitable for this application. At least chaeper than a Corioles for this size and with good tracing.
Paul
Hi Musafa,
Flow=30 SCFM (S=Standard so refered to 70F and 760 mmHg(a))
Pressure=40 Psig
Temp=20 C (Assumed)
To calculate to Volumetric (SCMF is Normelized (Could be refered to as Mass flow although confusing))
Law of Boyle/Gay-Lussac: (P*V)/T=Constant (T in degrees K, P in Abs pressure)...
Hi,
Piping in general is selected so that the actual volumetric velocity is approx 10 m/s. (Most gasses, there are exceptions like H2). If the velocity is bigger you get too much pressure drop, if the velocity is smaller you pay to much for your piping. For smaller length of pipe you can go...
Maybe a Thermal Liquid flow meter? (standard smallest range 0-12.5 mg/hr normally) You can ask manufacurers how low they can go. The smallest corioles meters go down to 50 g/hr, but there are rumours smaller ranges are on the way.
