Answer / carl_ellis

mmH2O is units of pressure, probably differential pressure in a case involving flow rate.


kg/hr is units of mass flow rate, kilograms per hour.



There is no inherent or implicit relationship between mmH2O and kg/hr. Therefore, there is no conversion between the two.

Differential pressure can be used to measure volumetric flow rate of liquids and gases and an inferred mass flow rate can be calculated for liquids with a known density and gases when there is static pressure and temperature compensation.


But not only do those those measuring conditions need to be met, but DP flow rate is dependent on a specific differential primary flow element and the characteristics of the fluid involved.


That means a measurement in mmH2O pressure drop in a specific design for a liquid differential flow meter could might be converted to a kg/hr mass flow rate (with appropriate static pressure and temperature for gas), but it would be specific only for that application and not transferable to any other application.

Any given DP measurement, say 2000 mmH2O, can represent 1.20Kg/hr in one flow meter and 45,000kg/hr in another flow meter. There is NO inherent relationship. Any correlation is application-specific.

Answer / ktripthi320@gmail.com

10000 mmwc = 1kg/hr

what happen if i install my pressure transmitter below the elevation of pipe in natural gas service. Also support your answer

3 Answers   C2C,

---

HOW TO SOLVE PROBLEM WITH ENRAF LEVEL TRANSMITTER 854 ATG THAT PASSWARD DO NOT Exist INTO TRANSMITTER TO ADJUST LEVEL WITH PORTABLE PET 847, WRITTEN WRONG PASSWORD , I AM SURE THAT DEFAULT PASSWARD (W2=ENRAF2) IS THIS TRANSMITTER NEED TO REPLACE SOFTWARE AND HOW?

0 Answers   Lerco,

---

The DCS stand for________________________. it is composed of the following major components: a:______________ b:______________ c:______________ d:______________

2 Answers  

---

pls give me presant awerness quistion and answer in my emailid.

0 Answers  

---

How will u convert the mmh2o in mass or Volumetic flow rate in DP Flow Transmitter. Give me the Brief explain using the formula

1 Answers   Walchandnagar Industries,

---

What is the electronic transmitter frequency.

1 Answers   CPCL, QAFCO,

---

any body who gone thru recent iocl interview.INSTRUMENTATION questions. I need.

0 Answers   IOCL,

---

What are the logic behind 2x2 and 2x3 logic and more when ask in interviews

1 Answers   Reliance,

---

What is the difference between HMI,SCADA and MMI,not abbrevation?

7 Answers   HCL,

---

How to calibrate DP tramitter in flow measurement application? consider my range of flow is 0 to 2000 kg/hr ? please give calculation of , How much pressure applied on low pressure side and high pressure side please give detail of calculation .... It so important for me please reply as soon as possible

1 Answers  

---

what is the control valve?how many types of control valves are there

6 Answers   Chemin, Hindustan Zinc,

---

Why thermo wells are used?

1 Answers  

---