Steam Flow Meter Orifice

Working Principle:

The running medium which flow through throttle flow equipment, filled with pipe .And it form local constriction near the throttle flow, the flow speed increase . So it can form the static differential pressure between the upward position and backward position . At the condition of the all known parameters, it can make a deduction of the relation between Differential pressure and flow range according to the theory of continuous flow and Bernoulli Equation, then impetrate the flow range .The fundamental formula is as below :

• C-output coefficient dimensionless d-throttling piece of the throttle flow orifice at the working condition or the laryngeal diameter 
• D-upward internal pipe diameter at the working condition 
• qm-mass flow  Kg/s
• qv-volume flow  m³/s
• ß-diameter rate d/D     dimensionless
• The density of the running medium Kg/m³
•  Coefficient   dimensionless

The structure of the orifice flow meter:

The compose of the throttle flow equipment

1. The throttle flow pieces: standard orifice plate, standard nozzle, long pathway nozzle,

1/4 circular orifice plate, double orifice plate, eccentric orifice plate,

Minus circle orifice plate,
taper entrance orifice plate etc .

2 .fetching pressure equipment: loop chamber, fetching pressure flange, holding collar,

Connecting pipe etc .

3 .flange connection  ( country standard ,different kinds of standard and other

Designed department’s  flange ) ,fastener .

4 .measuring tube

Description:

The orifice flow meter which consist of the standard orifice and multi-

Parameters differential pressure transducer and temperature transducer .TheDifferential pressure equipment with high measurement range rate .It can Measure the flux of the gas ,steam, liquid and the natural gas in the  Chemical Plant, Power Plant, Steel Industry and water supply etc.

Application range orifice flow meter

1.Diameter : 15 mm ≤DN≤1200mm

2.Pressure : PN≤10MPa

3.Working temperature : -50℃≤t≤550℃

4.Measurment range rate : 1:10, 1:15

5.Accuracy :0.5 % ,1%

Orifice Flow Meter  Features:

• The orifice flow meter usage in  Steam , Gas and Water to calculate all the signal-phase flow and it can also measure part of mix-phase flow .
• It is the standard throttle flow equipment which can use without actual flow to calibration .
• The integrated type is easy to installation, it can directly connect the differential pressure transducer and pressure transducer .
• High accuracy, perfect self-diagnose function.
• It can self-adjust the range of the orifice flow meter through programming
• It can display total flow, instantaneous flow, pressure and temperature at the same time .
• Matched manifold communication interface.
• High stability .
• Wide measurement range ,over 10:1.
•  High accuracy :+/-0.075%
• High stable capability : excel 0.1%
• High static pressure : 40MPa
• It can ignore the effect of the temperature and the static pressure.