YK-DFJ

Orifice Plate Flow Meter

Orifice plate flow meters combine a standard orifice plate with a multi-parameter differential pressure transmitter (or separate DP, temperature, and pressure transmitters) to form a high-rangeability differential pressure flow measurement system capable of measuring flow rates of gases, steam, liquids, and related media. Widely used in petroleum, chemical, metallurgical, power, heating, and water supply industries for process control and measurement, this type of throttling device—also known as a differential pressure flow meter—consists of a primary element (the orifice plate) and secondary instrumentation (differential pressure transmitter and flow indicator). Known for simple structure, easy maintenance, and stable performance, orifice plate flow meters are extensively applied across coal, chemical, transportation, construction, textiles, food, pharmaceuticals, agriculture, environmental protection, and daily life—playing a vital role in industrial and agricultural development, energy conservation, quality improvement, and enhanced economic and management efficiency. In process automation systems, flow meters serve two primary functions: as sensing elements for control systems and as totalizers for material quantity measurement.

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technology parameter

Pressure Tap Method	Corner joint chamber pressure tap, corner joint drilling pressure tap, flange pressure tap, diameter distance pressure tap	Connection Method	Wafer type, pipe type
Nominal Bore Diameter	DN50-DN4000	Main Material	Carbon steel, 304, 316
Process Temperature	-25 ～ 300℃	Applicable Pressure	1.0 MPa, 1.6 MPa, 4.0 MPa (can be agreed upon)
Accuracy	±0.5/±1.0%	Electrical Connection	M20×1.5 (can be agreed upon)
Output Method	4～20mA	Ingress Protection Rating	IP65, IP66
Certification	Intrinsically safe and flameproof	Power Supply Voltage	24VDC

Selection

Measurement Task
Nominal Diameter (DN)

A:DN15; B:DN20; C:DN25; D:DN32; E:DN40; F:DN65; G:DN80; H:DN100; I:DN125; J:DN150; K:DN200; L:DN250; M:DN300; N:DN350; O:DN400; P:DN450; Q:DN500; R:DN600; S:DN700; T:DN800; U:DN900; V:DN1000; W:DN1100; X:DN1200; Y:DN1300; Z:DN1400; DI:Others;
Power Supply

A:24VDC; B:220VAC; C:Non-powered;
Operating Temperature

A:≤80℃; B:≤120℃; C:≤200℃; D:≤300℃; E:≤400℃;
Pressure Rating

A:0–1.6MPa; B:0–2.5MPa; C:0–4.0MPa; D:0–6.3MPa; E:0–10MPa;
Output Signal

A:4–20mA; B:Pulse; C:Switch Signal; D:No Output;
Installation Type

A:Clamp-on; B:Flanged; C:Insertion type; D:Welded-connection;
Converter Type

A:Integral; B:Remote;
Protection Rating (IP Rating)

A:IP65; B:IP66; C:IP67; D:IP68;
Explosion-Proof Rating

A:Standard; B:Explosion-proof; C:Intrinsic Safety;
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