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Orifice plate flow meter is filled with fluid through the pipeline, when they flow through the pipeline throttle device, the
flow bundle will form a local contraction in the throttle device at the throttle parts, thus increasing the flow velocity, static
pressure is low, so there is a pressure drop generated in front of and behind the throttle, that is, the pressure difference, the
greater the flow rate of the media flow, the greater the pressure difference generated in front of and behind the throttle parts,
so the orifice plate flow meter can measure the flow rate of fluids through the measurement of the differential pressure. This
measurement method is based on the law of energy conservation and the law of continuity of flow.
Orifice plate flow meter is a differential pressure generating device to measure the flow rate, matching with all kinds of
differential pressure meter or differential pressure transmitter to measure the flow rate of all kinds of fluids in the pipeline.
Orifice plate flow meter throttling devices include ring chamber orifice plates, nozzles, etc. Orifice plate flow meter throttle
device used with differential pressure transmitter, can measure the flow rate of liquid, steam, gas, orifice plate flow meter is
widely used in petroleum, chemical, metallurgy, electric power, light industry, new energy and other sectors.
0
产品概述
产品特点
Structure is easy to replicate, simple
and rugged.
7 期限长。
结构，不易损坏，使用
Stable and reliable performance,
low cost.
Standard type orifice plate are
calculated and machined according
to international standards and can
be calibrated without flow.
Single-phase flow (liquid, gas,
steam) can be measured.
Adopts intelligent differential
pressure transmitter with high
precision and self-programmable
scale.
Equipped with HART
communication interface, high
stability.
Mechanical structure, not easy to
damage, long service life.
机械式
6 配有HART通讯接口，稳定性高。
5 量程可自编程。
采用智能差压变送器，精度高，
4 单相流(液、气、蒸汽)皆可测量。
3 算与加工，可无须实流标定。
标准型孔板采用国际标准计
2 性能稳定牢靠，价格低廉。
1 结构易于复制、简单牢固。
流量，孔板流量计广泛应用于石油、化工、冶金、电力、轻工、新能源等部门。
量计节流装置包括环室孔板，喷嘴等。孔板流量计节流装置与差压变送器配套使用，可测量液体、蒸汽、气体的
孔板流量计是测量流量的差压发生装置，配合各种差压计或差压变送器可测量管道中各种流体的流量。孔板流
衡定律和流动连续性定律为基准的。
件前后产生的压差就越大，所以孔板流量计可以通过测量压差来衡量流体流量的大小。这种测量方法是以能量守
收缩，从而使流速增加，静压力低，于是在节流件前后便产生了压力降，即压差，介质流动的流量越大，在节流
孔板流量计是通过充满管道的流体，当它们流经管道内的节流装置时，流束将在节流装置的节流件处形成局部
孔板（平衡多孔）流量计
01
Product overview
56
Product
BAIC GROUP
Orifice Plate (Balanced Multi-Hole) Flow Meter
Product Overview
Product Features
Structure is easy to replicate, simple
and rugged.
Stable and reliable performance,
low cost.
Standard type orifice plate are
calculated and machined according
to international standards and can
be calibrated without flow.
Single-phase flow (liquid, gas,
steam) can be measured.
Adopts intelligent differential
pressure transmitter with high
precision and self-programmable
scale.
Equipped with HART
communication interface, high
stability.
Mechanical structure, not easy to
damage, long service life.
-20 ~ 70℃（变送器） -40℃ ~ 450℃
压变送器
Caliber range
差
压力感应孔
Pressure resistance level
Body material
Ambient temperature
Process connection
上游压力感应孔 下游
直径
Power supply source
Output signal
Medium viscosity
Pressure taking method
Compensation mode
Matching accessories
孔板
直径
断面
收缩
最小
孔板
DN 25-1600
双重孔板 多孔孔板
偏心孔板 楔形孔板
环形孔板 锥形入口孔板
圆缺孔板 整体(内藏)孔板
标准孔板 1/4圆孔板
S D
P X
H V
Q M
K N
径距取压
法兰取压
角接钻孔取压
角接环室取压
J
f
z
H
结构形式
取压方式
公称通径
BSLG 孔板流量计
03 流量计选型表
β
本体材质 碳钢 304 316 孔板材质 碳钢 304 316 HC
介质粘度 ≤30CP（相当于重油） 值 0.2-0.8
供电电源 24V DC 防护等级 IP65
补偿方式 温度补偿 压力补偿 温压补偿
耐压等级 ≤42.0MPa
过程连接 法兰式 焊接式 夹装式 实用介质 液体 气体 蒸气
环境温度 介质温度
防爆等级 本安/隔爆BT4-CT6
配套附件 一次阀 三阀组 差压变送器
取压方式 环室取压、法兰取压、角接钻孔取压、径距取压
输出信号 4-20mA
口径范围 DN25-DN1600 精度等级 ±1.0 %FS
紧固件
取压环 取压法兰
环室取压
取压环
径距取压 法兰取压
57
Product
BAIC GROUP
Diameter distance pressure taking Flange pressure taking Ring chamber pressure taking
Pressure taking flange Pressure taking ring
Fastner
Pressure taking ring
Carbon steel 304 316 Orifice plate material
Accuracy level
Carbon steel 304 316 HC
-20~70°C(transmitter)
Flange type Welding type Clamping type
Medium temperature
Practical medium
Protection level
Explosion-proof level
Liquid Gas Steam
Intrinsically safe/flame-proof BT4-CT6
≤30CP (equivalent to heavy oil) β value
Ring chamber pressure taking, flange pressure taking, angle joint drilling pressure taking, radial distance pressure taking
Temperature compensation Pressure compensation Temperature and pressure compensation
Primary valve Three-valve group Differential pressure transmitter
Flow Meter Selection Table
Nominal
diameter
Pressure taking
method
Angle joint ring chamber pressure taking
Angle joint drill hole pressure taking
Flange pressure taking
Diameter distance pressure taking
Orifice plate
Minimum
shrinkage
cross-section
diameter
Orifice plate
diameter
Upstream pressure
sensing hole
Downstream pressure
sensing hole
Differential pressure transmitter
Structural form
Standard orifice plate
Circular notch plate
Ring-shape orifice plate
Eccentric orifice plate
Double orifice plate
1/4 Round orifice plate
Overall (built-in) orifice plate
Conical inlet orifice plate
Wedge orifice plate
Multi-pore orifice plate
Orifice plate flow meter
口径(mm)：
介质密度：
流体压力(MPa)：最低、常用、最高
介质温度(℃)：最小、常用、最大
最小、常用、最大
流量范围(m³/h)：
订货须知订货请写明下列内容被测介质的名称：
五阀组及紧固件
三阀组及紧固件
无
3
2
1
单晶硅差压变送器
电容式差压变送器
无
9
8
7
温度压力补偿
温度补偿
压力补偿
无
7
6
5
4
HC
316
8
7
321
316
4
3
304
碳钢
6
5
304
碳钢
2
1
蒸气
气体
液体
3
2
1
6.3 MPA 42 MPA
4.0 MPA 25 MPA
2.5 MPA 16 MPA
1.6MPA 10 MPA
4 8
3 7
2 6
1 5
阀组附件
差压变送器
公称压力
补偿方式
孔板材质
法兰材质
测量介质
BSLG 孔板流量计
58
Product
BAIC GROUP
Orifice plate flow meter
Nominal pressure
Measured medium
Liquid
Gas
Steam
Flange material
Orifice plate material
Carbon steel
Carbon steel
Compensation mode
None
Pressure compensation
Temperature compensation
Temperature and pressure compensation
Differential pressure transmitter
None
Capacitive differential pressure transmitter
Monocrystalline silicon differential pressure transmitter
Valve group accessories
None
Three-valve group and fasteners
Five-valve group and fasteners
Ordering information, please specify the following when ordering
Measured medium name:
Flow rate range (m³/h)
Minimum, common, maximum
Medium temperature (°C): minimum, common, maximum
Fluid pressure (MPa): minimum, common, maximum
Medium density:
Caliber (mm):
Flange requirements:
·
