DP Flow Meter includes throttling parts (eg. orifice plates), differential pressure transmitters, three-way valves. Used for flow measurement of various liquids, gases and steam.

Integral DP Flow Meter

Integral DP Flow Meter installs the throttle, differential pressure transmitter, three-way valve and accessories on the short process pipe. It is supplied as a whole after calibration. Reduce installation errors. Shorten installation man-hours. There is no need to connect additional pressure measuring points and temperature measuring points to make the output signal. Automatically realize temperature and pressure compensation to improve measurement accuracy.

Sino-Inst, Manufacturer for differential pressure flow meters. Including the Orifice plate, Venturi, Annubar, etc. Suitable for liquid, gas, and steam flow measurement. Please contact our sales engineers for technical support!

Features of Integral DP Flow Meter

a. Measurement accuracy:

Because the integrated differential pressure flowmeter does not require a pressure pipe, the phenomenon of differential pressure distortion is reduced. It has higher accuracy than the split differential pressure flowmeter. For differential pressure flow meters that require real flow calibration. Because it is the flow calibration of the whole device. So the system accuracy can be improved by 0.3%.

b. Simple installation

The integrated differential pressure flowmeter only needs to be flanged or directly welded to the phenomenon pipeline. And directly lead to the current signal of the differential pressure transmitter. There is no need to lay additional pressure pipelines and install differential pressure transmitters.

Used to measure the flow of gas or steam. Due to the optional multi-parameter differential pressure transmitter. It can automatically monitor temperature and pressure changes and automatically trim the output signal. So there is no need to install additional temperature and pressure measuring elements. Greatly improve the installation progress.

c. Wide range ratio

The integrated differential pressure flowmeter with multi-parameter differential pressure transmitter is equipped with dynamic algorithm compensation. So the turndown ratio is greatly improved. The large range can reach 8:1.

d. Low purchase, installation and operating costs

The integrated differential pressure flowmeter does not need to lay additional pressure pipeline. And there is no need to heat the impulse pipeline. Therefore, the installation cost is greatly saved. Adapt to the severe cold area in winter or occasions requiring heat preservation.

For the integrated differential pressure flowmeter with multi-parameter differential pressure transmitter, it integrates temperature and pressure compensation. Therefore, the purchase cost of pressure and temperature transmitters is eliminated. Greatly reduce the cost of purchasing and installation.

e. Variety of forms

Because the primary element can use different forms of throttling devices. Therefore, as long as the appropriate integrated differential flowmeter is selected for various operating conditions. It can realize the accurate flow of any kind of complicated working conditions.

Integral DP Flow Meter Specification

Pipe diameter (mm)DN50-DN1000 optional
Measured mediumSingle-phase fluid such as liquid, gas, steam (or can be considered as single-phase fluid)
temperature range-40℃~450℃
Pressure range2.5MPa (4.0MPa)
ThrottlePreferred fixed-value ISA1932 nozzles (the preferred serial number β20 for fixed-value aperture is 0.52 and 0.72),
fixed-value orifice plate (the preferred serial number β20 for fixed-value aperture is 0.34, 0.52 and 0.72)
Pressure methodAngle joint pressure or flange pressure
Differential pressure transmitterPMD230, 1151, 3051CD, 3095CD, EJA110A
Range3:1, 6:1, 10:1, 10:1 or more
System uncertainty±1.0%, ±1.5%, ±2.0%, ±2.5%
(The accuracy of the system is affected by many factors.
Our company can provide you with relevant consulting services)
Throttle material1Cr18Ni9Ti, SUS316, others
Material of clamp1Cr18Ni9Ti, SUS316, 20# steel, others
Power supplyTransmitter part 24VDC (20mA)
Flow display equipment: 220VAC, 50Hz 24VDC
Explosion proofiaⅡcCT2-T5 intrinsically safe explosion-proof
Transmitter output signal4-20mA
(communication connection requires a minimum load resistance of 250W)
Protection levelIP65
Allow vibration acceleration£1.0g
Ambient temperature-20℃~55℃
(please declare if it exceeds this range)
environment humidity45%~85%
Atmospheric pressure86~106kPa

DP Flow Meter Working Principle

The fluid filled with the pipe flows through the throttling device in the pipe, and the stream will form a local contraction at the throttling part. As a result, the flow velocity will increase and the static pressure will decrease. So a static pressure difference (or differential pressure) is generated before and after the throttling part.

The greater the flow rate of the fluid, the greater the differential pressure generated before and after the throttle. Therefore, the flow can be measured by measuring the differential pressure.

Knowing the relevant parameters. According to the principle of flow continuity and Bernoulli equation, the relationship between the differential pressure and the flow rate can be derived1 to obtain the flow rate. The basic formula is as follows:

DP Flow Meter Working Principle

c——outflow coefficient dimensionless

d——The diameter of the orifice or throat of the throttle under working conditions m

D——Inner diameter of upstream pipe under working conditions m

qm——mass flow kg/s

qv——Volume flow m3/s

β-diameter ratio d/D dimensionless

ρ——The density of the fluid kg/m3

ε——Expansibility coefficient dimensionless

Difference between integrated DP flow meter and general DP flowmeter

A general differential pressure flow meter includes two parts: a throttle and a differential pressure transmitter. The installation requires a pressure pipe system to connect the two.

The integrated differential pressure flowmeter directly assembles the throttling piece, the pressure pipe system and the differential pressure transmitter. At the same time, the integrated differential pressure flowmeter depends on the product. It can have both pressure and temperature measurement functions, temperature-pressure compensation functions, etc., all integrated in one device.

Orifice Plate Flow Meter

Orifice plate flow meter works together with an orifice plate, differential pressure transmitter, with Differential Pressure Measurement principle. Easy installation. Orifice plate flow meters can be used with gases, liquids, corrosive, and high temperature fluids. Orifice flow meters can measure steam, gas, liquids, and many industrial areas. Applications include steam flow, boiler feedwater, and fluid flow rates in building water lines.

Sino-Inst offers Integral DP Flow Meters.

A wide variety of Integral DP Flow Meter options are available to you, such as brass, carbon steel. You can also choose from free samples.

Sino-Inst is Integral DP Flow Meter supplier.Integral DP Flow Meter products are most popular in Domestic Market, Southeast Asia, and Mid East.

You can ensure product safety by selecting from certified suppliers, including 375 with ISO9001, ISO14001, and Other certification.

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Please provide your measurement parameters or details. Sino-Instrument support customer customization and OEM
Please provide your measurement parameters or details. Sino-Instrument support customer customization and OEM

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