Steam 유량 측정에 이상적인 와류 유량계
와류 유량계는 넓은 온도와 압력 범위에서 액체, 기체 및 증기(steam)의 유량을 측정할 수 있는 매우 다재다능한 유량계입니다. 이 유량계의 장점들은 다른 유형의 유량계보다 증기 유량 측정에 더 적합하게 만들어줍니다.
증기는 다양한 산업 분야에서 가장 일반적으로 사용되는 고온, 고압의 열 매질입니다. 예를 들어 화학 공장에서는 가열, 증류 및 농축에 사용되며, 바이오, 식품 및 제약 공장에서는 멸균, 소독 및 청소에 사용되며, 반도체 공장 및 지역 난방/냉각 공장에서는 공조에 사용되며 많은 다른 응용 분야에서 사용됩니다. 증기에는 포화 증기(saturated steam)와 과열 증기(superheated steam) 두 가지 유형이 있습니다. 포화 증기는 열 효율이 높은 유체이지만, 증기 운반에 따른 압력 손실과 열 방사로 인해 포화 상태를 유지하기가 어려울 때가 있으므로 때로는 더 높은 온도와 압력에서 과열 상태로 공급됩니다. 와류 유량계는 과열 증기를 포함한 고온, 고압 증기의 유량을 측정할 수 있어 많은 시설에서 증기 유량 측정을 위한 최적의 유량계로 선택됩니다.
Yokogawa 와류 유량계 VY 시리즈는 최대 400mm까지의 넓은 측정 범위, 최대 450°C의 고온 및 ASME Class 1500의 고압에서 유체를 측정할 수 있는 능력을 가지고 있습니다. 뛰어난 견고성과 안정성뿐만 아니라 원격 유지 보수 및 자체 진단 기능도 갖추어져 있어 효율적인 유지 보수를 보장하며 공장 운영의 장기적인 안정성과 생산 효율성을 향상시켜줍니다.
Steam 유량 측정에서 와류 유량계가 가지는 장점
이 섹션에서는 다양한 현장에서 사용되는 오리피스 유량계(차압 유량계) 대비, 증기 유량 측정에 와류 유량계가 가지는 장점을 설명합니다.
변동하는 증기 유량을 수용할 수 있는 넓은 Rangeability
일반적인 오리피스 유량계의 Rangeability는 5:1 정도로 측정 범위에 따라 큰 오차를 초래할 수 있습니다. 이와 대조적으로, 와류 유량계 VY 시리즈는 80:1의 Rangeability로 넓은 측정 범위를 가지며 Accuracy 오차를 일정한 수준으로 유지합니다. 이 뛰어난 Rangeability로 인해 계절과 운전 부하에 따라 변동하는 증기 유량을 처리할 수 있습니다.
압력손실이 적어 안정된 작동을 보장
오리피스 유량계는 오리피스(스로틀 밸브)에 의해 생성되는 차압을 통해 유량을 측정하므로 오리피스에 의한 압력손실이 발생합니다. 반면에 와류 유량계는 셰더 바(Shedder bar)에 의한 압력손실이 발생하지만, 오리피스에 비해 작습니다. 압력손실은 증기 품질의 저하를 유발하여 에너지 손실로 인한 높은 비용을 야기합니다. 따라서 압력손실이 적은 와류 유량계는 증기 품질을 유지 및 안정적인 플랜트 운전에 유리합니다.
기계적 Moving Parts가 없어서 고장 가능성이 낮음
오리피스 유량계는 In-line 계기가 아니기 때문에 유지보수가 용이하지만, 오리피스(스로틀 밸브), Impulse Piping 및 3-Valve Manifold와 응축물 포트(Condensate pots) 등의 구성품이 많아서 많은 유지보수 항목을 필요로 합니다. 그러나 와류 유량계는 기계적 Moving parts가 없는 간단한 구조를 가지므로 튼튼하며 고장 가능성이 적습니다. 이러한 장기적인 견고성과 낮은 유지보수 비용은 공장 운영에 큰 도움이 됩니다.
VY 시리즈는 다음과 같은 사용자에게 추천합니다.
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온도와 압력보상을 사용해 높은 Accuracy로 장치 운영의 효율성과 안정성을 향상시키고자 하는 분들
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Device Condition에 기반한 예측 유지보수를 도입하여 Downtime을 최소화하고자 하는 분들
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구성 요소 기반(component-based) 유지보수를 통해 유지보수 비용을 줄이고자 하는 분들
Details
VY 시리즈의 특징
디지털 기술을 활용하여 효율성 향상 및 인력 절감형 유지보수 활동 지원
가동 중인 장치가 많은 플랜트에는 장치 상태를 기반으로 하는 효율적이고 체계적인 예측 유지보수인 "상태 기반 유지보수(CBM)"가 필요합니다. VY 시리즈는 센서 요소가 포함된 와류 발생기 바를 비롯한 전체 장치에 대한 "자가 진단 기능(내장 검증)"과 내부 신호의 고급 디지털화를 통해 측정 신호의 특성을 기반으로 측정 유체의 맥동 및 변동과 배관 진동을 감지하는 "공정 진단 기능"을 갖추고 있습니다. FSA130 자기 유량계 및 와류 유량계 검증 도구(별매)와 조정, 구성 및 관리 소프트웨어인 FieldMate(별매)를 함께 사용하면 "검증 기능"과 "원격 유지보수 기능"을 제공합니다. 이러한 기능은 현장에서 떨어진 계측실의 PC 화면에서 쉽게 사용할 수 있어 장치 상태 및 작동 조건의 점검 및 관리를 획기적으로 개선합니다. 이처럼 VY 시리즈는 유지보수 활동의 효율성과 인력 절감을 촉진하고 효율적인 플랜트 운영을 지원합니다.
유지보수 시간 단축 및 유량 측정 안정화를 위한 독창적인 구조 및 기술
VY 시리즈는 기존 YEWFLO 시리즈의 높은 신뢰성과 검증된 오리지널 센싱 구조를 계승합니다. 와류 발생기 바는 두 개의 유량 센서와 하나의 온도 센서(옵션)를 통합한 독특한 센싱 구조를 가지고 있으며 본체에서 분리할 수 있습니다. 이 구조는 견고성, 장기 안정성, 짧은 면간 거리, 짧은 상류 직선 배관 길이를 제공할 뿐만 아니라 유체 침전 및 기타 요인으로 인해 유지보수가 필요한 경우 배관에서 전체 유량계를 제거하지 않고도 와류 발생기 바를 청소하고 교체할 수 있습니다. 이는 유지보수에 필요한 가동 중지 시간을 최소화하는 데 도움이 됩니다. 또한 당사의 독자적인 디지털 신호 처리 기술은 배관 진동을 효과적으로 제거하여 안정적인 측정을 가능하게 합니다. YEWFLO 시리즈의 후속 세대와 기계적 및 기능적으로 호환되는 VY 시리즈는 추가 배관 작업 없이 동일한 위치에 설치할 수 있습니다.
VY 시리즈는 유지보수 작업의 효율성과 인건비 절감을 지원하여 효율적인 플랜트 운영을 지원합니다.
제품 라인업
VY 시리즈 공통 사양
VY 시리즈 와류 유량계는 액체, 기체, 포화 증기 및 과열 증기의 유량을 측정할 수 있으며 자가 진단 및 원격 유지 보수 기능을 갖추고 있습니다. 접액부는 듀플렉스 스테인리스강을 포함한 스테인리스강 또는 니켈 합금 등 다양한 재질 중에서 선택할 수 있습니다. 이 시리즈는 방폭 및 SIL2를 포함한 광범위한 표준을 준수합니다. 전류 입력 기능(전류 입력 사양 선택 시 HART7)은 액체, 기체 및 증기의 질량 유량 및 에너지 유량을 포함하여 이전보다 더욱 정확한 계산 기능*을 지원합니다.
＊ 포화 및 과열 증기 표 내장
[공통 사양]
| Model | VY □ □ □ (일체형 유량계, 원격 센서), VY4A(원격 송신기) |
|---|---|
|
측정 유체 |
액체, 기체, 포화 증기, 과열 증기 (다상 유동 및 점착성 또는 부식성 유체는 피하십시오) |
|
통신 및 입출력 |
HART 7 통신, 4~20mA DC, 펄스/상태 출력, 아날로그 입력 |
|
방폭형 |
IECEx Ex db / Ex ia, ATEX Ex db / Ex ia, FM Ex db / Ex ia, FMc Ex db / Ex ia, Japan Ex db, NEPSI Ex db / Ex ia, Korea Ex db / Ex ia |
|
적합성 표준 |
EMC, PED, EU RoHS, CE marking, NACE, Functional Safety (SIL2), NAMUR (NE21 / NE107), Marine Certificate (ABS, DNV) |
자세한 사양은 다운로드 탭 아래에 있는 일반 사양서를 참조하십시오.
일반형
일반형은 VY 시리즈의 기본 모델입니다.
라인업에는 15mm에서 400mm까지의 연결 크기, -40°C에서 250°C까지의 공정 온도, 그리고 ASME Class 900까지의 공정 압력이 포함됩니다.
[일반형 상세 사양]
|
본체 유형 |
General Type | |
|---|---|---|
| Type of Shedder Bar | General Type, Long Neck Type | |
| Accuracy | Liquid | ± 0.75 % of reading (depends on Reynolds number) |
| Gas, Steam | ± 1.0 % of reading (depends on the flow velocity) | |
| Process Temperature | -40 °C to 250 °C | |
| Max Process Pressure | ASME Class 900, EN PN40, JIS 40K | |
| Ambient Temperature | -40 ( / -50 ) °C to 85 °C | |
| Connection Size | Wafer | From 15 to 100 mm |
| Flange | From 15 to 400 mm | |
| Degree of Protection | IP66 / IP67 | |
Refer to the General Specification sheet located under the Downloads tab for detailed specifications.
내장형 온도 센서 타입
내장형 온도 센서 타입은 셰더 바(와류 발생기)에 온도 센서(Pt1000)가 내장되어 있어 공정 유체의 온도를 동시에 측정할 수 있습니다.
이 유량계는 25mm에서 300mm까지의 연결 크기와 호환되며, 고온형 및 축소형 모델과 함께 사용할 수 있어 다양한 유체를 처리할 수 있습니다. 보상 계산은 파이프 중심 온도에 가까운 온도에서 수행되므로 유량을 더욱 정확하게 측정할 수 있습니다. 외부 압력계의 신호를 캡처하여 전류 입력 기능(HART7 통신 및 전류 입력 사양 선택 시)을 사용하여 보상 계산에 활용함으로써 더욱 정확한 유량 측정을 지원할 수 있습니다.
[내장 온도 센서 유형별 사양]
| Type of Body | General Type [Combinationable Body] Reduced Bore Type (1 or 2 size reduction) |
|
|---|---|---|
| Type of Shedder Bar | General Type with Temperature Sensor, Long Neck Type with Temperature Sensor [Combinationable Shedder bar] Hight Temperature Type with Temperature Sensor |
|
| Accuracy | Liquid | ± 0.75 % of reading (depends on Reynolds number) |
| Gas, Steam | ± 1.0 % of reading (depends on the flow velocity) | |
| Process Temperature | -40 °C to 250 °C (For General Type and Long Neck Type) -40 °C to 400 °C (For High Temperature Type) |
|
| Max Process Pressure | ASME Class 900, EN PN40, JIS 40K | |
| Ambient Temperature | -40 ( / -50 ) °C to 85 °C | |
| Connection Size | Wafer | From 25 to 100 mm |
| Flange | From 25 to 300 mm | |
| Degree of Protection | IP66 / IP67ㅈ자잣자ㅈ | |
고온/극저온형
고온형은 연결부 크기가 25~400mm이고 유체 온도는 최대 450°C(내장 온도 센서 사용 시 최대 400°C)까지 지원합니다.
극저온형은 연결부 크기가 15~100mm이고 유체 온도는 최저 -196°C까지 지원합니다.
이 모델에서는 일체형 또는 원격형 중 하나를 선택할 수 있습니다.
.
[Specific Specification of High Temperature Type]
| Type of Body | General Type [Combinationable Body] Reduced Bore Type (1 or 2 size reduction) |
|
|---|---|---|
| Type of Shedder Bar | High Temperature Type High Temperature Type with Temperature Sensor |
|
| Accuracy | Liquid | ± 0.75 % of reading (depends on Reynolds number) |
| Gas, Steam | ± 1.0 % of reading (depends on the flow velocity) | |
| Process Temperature | -40 °C to 450 °C | |
| Max Process Pressure | ASME Class 900, EN PN40, JIS 40K | |
| Ambient Temperature | -40 ( / -50 ) °C to 85 °C | |
| Connection Size | Wafer | From 25 to 100 mm |
| Flange | From 25 to 400 mm | |
| Degree of Protection | IP66 / IP67 | |
[Specific Specification of Cryogenic Type]
| Type of Body | General Type [Combinationable Body] Reduced Bore Type (1 or 2 size reduction) |
|
|---|---|---|
| Type of Shedder Bar | Cryogenic Type | |
| Accuracy | Liquid | ± 0.75 % of reading (depends on Reynolds number) |
| Gas, Steam | ± 1.0 % of reading (depends on the flow velocity) | |
| Process Temperature | -196 °C to 250 °C | |
| Max Process Pressure | ASME Class 900, EN PN40, JIS 40K | |
| Ambient Temperature | -40 °C to 85 °C | |
| Connection Size | Wafer | From 15 to 100 mm |
| Flange | From 15 to 100 mm | |
| Degree of Protection | IP66 / IP67 | |
Refer to the General Specification sheet located under the Downloads tab for detailed specifications.
Reduced Bore 유형 (1 or 2 Size Reduction)
The reduced bore 유형은 센서 유닛의 상류 및 하류 양쪽에 감속기(감압/팽창 파이프)가 통합된 모델입니다. 따라서 계절 및 작동 부하에 따라 유량이 크게 변동하는 배관에 이상적입니다. The reduced bore 유형은 1 크기 축소형과 2 크기 축소형 두 가지 유형으로 제공되며, 플랜지 모델은 최대 200mm의 연결 크기를 수용합니다. 축소형은 내장형 온도 센서 유형 및 고온/극저온 유형과 결합하여 광범위한 유체를 측정할 수 있습니다
[Reduced Bore 유형 세부사양 (1 or 2 Size Reduction)]
| Type of Body | Reduced Bore Type (1 or 2 size reduction) | |
|---|---|---|
| Type of Shedder Bar | General Type [Combinationable Shedder bar] General Type with Temperature Sensor, High Temperature Type High Temperature Type with Temperature Sensor, Cryogenic Type |
|
| Accuracy | Liquid | ± 1.0 % of reading (depends on Reynolds number) |
| Gas, Steam | ± 1.0 % of reading (depends on the flow velocity) | |
| Process Temperature | -40 °C to 250 °C | |
| Max Process Pressure | ASME Class 300, JIS 20K | |
| Ambient Temperature | -40 ( / -50 ) °C to 85 °C | |
| Connection Size | ||
| Flange | 1 size reduction: 25 to 200 mm 2 size reduction: 40 to 200 mm |
|
| Degree of Protection | IP66 / IP67 | |
Refer to the General Specification sheet located under the Downloads tab for detailed specifications.
고압형
이 제품은 ASME Class 1500 플랜지 압력 등급을 갖춘 1단계 축소 모델입니다. 따라서 가혹한 고압 조건에서도 안정적인 측정을 제공합니다.
일반형 센서와 함께 사용되며, 25~150mm의 플랜지형 연결 크기를 사용합니다.
[[고압형 상세 사양]
| Type of Body | High Pressure Reduced Bore Type ( 1 size reduction) | |
|---|---|---|
| Type of Shedder Bar | General Type | |
| Accuracy | Liquid | ± 1.0 % of reading (depends on Reynolds number) |
| Gas, Steam | ± 1.0 % of reading (depends on the flow velocity) | |
| Process Temperature | -40 °C to 250 °C | |
| Max Process Pressure | ASME Class 1500 | |
| Ambient Temperature | -40 ( / -50 ) °C to 85 °C | |
| Connection Size | ||
| Flange | 25 to 150 mm | |
| Degree of Protection | IP66 / IP67 | |
자세한 사양은 다운로드 탭에 있는 일반 사양서를 참조하십시오.
Dual-Sensor 형
이 유형은 플랜지 압력 등급이 ASME Class 900까지인 이중 센서(용접)형입니다. 직렬로 연결된 두 장치의 구조는 높은 신뢰성이 요구되는 응용 분야에 가장 적합합니다.
크기는 여러 유형의 센서와 조합하여 15mm에서 200mm까지입니다
[Dual-Sensor 형 상세 사양]
| Type of Body | Dual-Sensor (Welded) General Type | |
|---|---|---|
| Type of Shedder Bar* | General Type, Long Neck Type [Combinationable Shedder bar] General Type with temperature sensor, Long Neck Type with temperature sensor, High Temperature Type, High Temperature Type with temperature sensor, Cryogenic Type |
|
| Accuracy | Liquid | ± 0.75 % of reading (depends on Reynolds number) |
| Gas, Steam | ± 1.0 % of reading (depends on the flow velocity) | |
| Process Temperature | -196 °C to 450 °C | |
| Max Process Pressure | ASME Class 900 | |
| Ambient Temperature | -40 ( / -50 ) °C to 85 °C | |
| Connection Size | ||
| Flange | 15 to 200 mm | |
| Degree of Protection | IP66 / IP67 | |
* 셰더 바의 종류는 상류 및 하류와 동일합니다.
* 자세한 사양은 다운로드 탭에 있는 일반 사양서를 참조하십시오.
VY 시리즈 적용
- 증기 배관의 유량 측정
- 공기 및 질소와 같은 유틸리티 가스의 유량 측정
- 온수 및 냉수, LNG 및 기타 극저온 액체 및 화학 물질(무기 물질 포함)의 유량 측정
“Total Insight” - A Product Concept for Supporting Customers Throughout the Entire Product Lifecycle
From Sensing to Sensemaking
“Total Insight” is a shared concept for Yokogawa’s field products that supports customers throughout the entire product lifecycle. By providing new value through superior technology and insight, it is aimed at optimizing costs over the entire lifecycle. The VY series is developed from four perspectives based on the Total Insight concept.
- Simplified Selection : Reduced engineering work hours and procurement costs
- Smart Assist : Reduced start-up time
- Process Guard : Improved operational efficiency and reduced errors
- Expert Solution : Improved efficiency in maintenance operations
Reduced Engineering Work Hours and Procurement Costs / Total Insight - Simplified Selection -
A Comprehensive Lineup to Meet Various Flow Measurement Needs
- Easy Device Selection
A wide range of flow sizes, up to 400 mm, can be accommodated. The reduced bore type allows reductions of up to two sizes. With the same face-to face dimensions as successive generations of the YEWFLO series, they can be used safely and reliably for long periods of time.
- Compliant With a Wide Range of Standards
With high quality and functionality, these products conform to a variety of international standards, including- Functional safety: IEC 61508 compliant, Safety Integrity Level SIL2
- Explosion protection: IECEx, ATEX, FM, FMc, Taiwan, UAE, Korea, Brazil, Japan
- General safety: Various national EMC, PED, EURoHS, CE Mark, CRN, ABS classification, DNV classification
- Industry standards: NAMUR NE21 , NE107, NACE materials
- Extensive Built-in Calculation Functions
Calculates volume, mass, and energy flow rates using temperature, pressure, and density from the built-in temperature sensor or current input. The steam tables built into the device are used to calculate the mass and energy of saturated and superheated steam.
Reduced Start-up Time / Total Insight - Smart Assist -
Provides Stable Flow Measurement Resistant to Vibration
- Ensures Stable Measurement
The unique integrated structure of the vortex shedder bar and sensor allows the entire vortex shedder bar to capture the vortex signal. A short straight pipe length enables stable measurement regardless of the mounting position.
- Accurately Captures the Flow Signal
The unique structure with two sensor elements cancels piping vibration noise. Yokogawa's proprietary digital signal processing technology “SSP＊” removes noise signals, extracting only the vortex signal. Possible false outputs due to piping vibration are indicated by an alarm.＊SSP: Yokogawa's proprietary signal processing that removes noise signals from signals obtained from the two sensor elements to extract the vortex signal.
- Ready to Use as Soon as Installed
Device parameters are set at the factory before shipping. The automatic adjustment function provided by SSP basically eliminates the need for on-site adjustment. This means that the devices are ready for use as soon as they are installed. Verification tools, including waveform monitoring, make it easy to check status after installation.
Improved Operational Efficiency and Reduced Errors / Total Insight - Process Guard -
Advanced Self-Diagnostics and Remote Maintenance
- Self-Diagnosis of the Entire Device Can Be Performed
All functional blocks are self-diagnosing, allowing easy identification of areas requiring equipment maintenance. Since it conforms to the functional safety SIL2 standard requirements, it can be used in loops that require high reliability, such as safety instrumentation.
- The Health of the Device Can Be Checked From a Remote Location, Such as an Instrument Room
The FSA130 Magnetic Flowmeter and Vortex Flowmeter Verification Tool enables remote maintenance. No need for extensive preparations such as bringing in an oscilloscope, etc. The measurement status can be easily checked during operation, and can be tuned as needed.
- Supporting Condition-Based Device Maintenance
Sensor status can be predicted by the FSA130 Magnetic Flowmeter/Vortex Flowmeter Verification Tool. Graphical display of the condition of sensor elements accumulated inside the flowmeter to check for changes over time and estimate when maintenance is required.
Improved Efficiency in Maintenance Operations / Total Insight - Expert Solution -
Various Functions to Support Efficient Maintenance Operations
- Process-Side and Device-Side Anomalies Can Be Easily Identified
The process diagnostic function detects piping vibration and fluid oscillation, while the self-diagnostic function monitors the health of the device. This ability to identify anomalies allows for a quick and precise response.
- Easy Maintenance
The unique structure of Yokogawa’s vortex shedder bar is known for its robustness and long-term stability, but in the event of unforeseen circumstances, they can be removed for cleaning or replacement. The vortex shedder bar can be easily detached from the body, eliminating the need to remove the entire flowmeter from the piping.
- Reduced Downtime
Because transmitter parameters can be backed up in the remote sensor’s memory, the current state can be easily restored in the event of a transmitter replacement. This means that operation can be resumed after a short downtime.
Technical Information - Measurement principle -
Vortex flowmeters use the Von Karman Effect to measure the flow rate of liquids, gases, and steam. This section explains the principle.
The Operating Principle of Vortex Flowmeters
- What Is a Von Karman Vortex?
In the early 20th century, the Hungarian-born mathematician and physicist Theodore von Karman discovered that when a liquid or gas flows perpendicular to an obstacle, it creates alternating vortices on either side of that obstacle. These rows of vortices are called “Von Karman vortex streets.”
Von Karman further found that the number of vortices generated is proportional to the velocity of the fluid that generates them. This number of vortices generated is called the “Von Karman vortex frequency.” The relationship between the frequency and the flow velocity can be mathematically expressed with the following formula (1). Formula (2) further expresses the relationship with the internal structure of a vortex flowmeter. Putting these two formulas together and expressing them in terms of volumetric flow rate yields formula (3).
Formula (1)
Formula (2)
Formula (3)
f: Von Karman vortex frequency, St: Strouhal number, v: flow velocity, d: width of vortex generator, Q: volumetric flow rate, D: inner diameter of vortex flow meter
The Strouhal number (St) is a dimensionless number determined by the shape and dimensions of the vortex shedder bar, and by properly choosing the shedder bar’s shape, it becomes constant over a wide range of Reynolds number values. Figure 1 shows the relationship between the Reynolds number and the Strouhal number.
Relationship between Reynolds number and Strouhal number (St)
Therefore, if the Strouhal number is known in advance, the flow rate can be determined by measuring the vortex frequency. It has also been found that the volumetric flow rate can be measured irrespective of the pressure, temperature, density, viscosity, etc. of the fluid. However, when measuring volumetric flow or mass flow under standard (reference) conditions, temperature and pressure corrections are required.
- How Is Vortex Frequency Measured?
When vortices form and pass through a vortex shedder bar (obstacle), the pressure in that area is lower than that in the rest of the fluid. This low pressure creates a pressure differential (dp) on each side of the vortex shedder bar, and stress is applied to the vortex shedder bar from the high-pressure side toward the low-pressure side. The position where the vortices are generated switches regularly, causing the position of the low-pressure area to change and the direction of the stress to shift, causing the vortex shedder bar to oscillate. The frequency of this oscillation is the Von Karman vortex frequency.
The vortices generated create low-pressure and high-pressure areas on both sides of the vortex shedder bar, and force is exerted toward the low-pressure area. As the position of the vortices change from one side to the other, the direction of this force is switched, causing the vortex shedder bar to oscillate.
Several methods are available as means of measuring this oscillation. The most suitable for this application is the piezoelectric crystal sensor. When compressed, the piezoelectric crystal sensor produces an electrical signal that is processed by the flowmeter’s electronics. By measuring the Von Karman vortex frequency (the Strouhal number and the diameter of the cylinder are known), a simple calculation by the flowmeter’s electronics can determine the rate of volumetric flow through the pipe.
Technical Information - Our Proprietary Signal Processing Technology -
Vortex flowmeters using Von Karman vortices are vibration sensors that count vortex frequencies, and as such, they are susceptible to external vibration noise. However, the VY series uses Yokogawa’s proprietary signal processing technology to ensure stable measurements at all times. Here is how it works.
Noise Reduction
As with previous models, the VY series of vortex flowmeters incorporates Yokogawa’s proprietary signal processing technology, SSP. SSP performs frequency analysis of the signal detected from the vortex shedder bar, divides it into separate bands, and automatically selects the optimal bandpass filter to transmit only the correct vortex signal with the noise removed. Even if the vortex signal contains vibration noise, only the vortex signal is output, thus ensuring stable measurement.
Noise from strong piping vibration can affect the accuracy of vortex frequency detection, but the two piezoelectric elements in the VY series have reversed polarity, and therefore do not detect vibrations in the flow direction or the perpendicular direction. Noise in the direction of lift is reduced, allowing only the vortex signal to be detected. With superior vibration resistance and diagnostic functions based on our proprietary technology, the VY series provides stable measurements at all times.
Technical Information - Required Straight Pipe Lengths for Different Installation Conditions -
In general, unbalanced velocity distribution in a pipe affects the accuracy of flow measurement in vortex flowmeters. Shown below are the required straight pipe lengths and key points to consider, along with typical installation examples.
Straight Pipe
Ensure at least 10D upstream and 5D downstream.
Reducer Pipe
Ensure at least 5D upstream and 5D downstream.
Expander Pipe
Ensure at least 10D upstream and 5D downstream.
Ben Pipes
(1) Single bend pipe
Ensure at least 10D upstream and 5D downstream.
(2) Pipe with double bend in the same plane
Ensure at least 10D upstream and 5D downstream.
(3) Pipe with double bend not in the same plane
Ensure at least 20D upstream and 5D downstream.
Valve Position and Straight Pipe Length
The valve should be installed downstream of the vortex flowmeter. Ensure an upstream straight pipe length of at least 5 to 10D (see above) and a downstream straight pipe length of at least 5D. If installing the valve upstream of the vortex flowmeter cannot be avoided, ensure a straight pipe length of at least 20D upstream and 5D downstream.
Technical Information - Mounting Orientation -
The mounting can be horizontal, vertical, or inclined, as long as the pipe is always filled with fluid. However, when installing on horizontal or inclined piping, be sure to mount above the pipe to avoid flooding of the terminal box of separated detectors or the transmitter of integrated models. This is illustrated in the diagrams below.
Horizontal Piping
Vertical Piping
Inclined Piping
자료실
The key to achieving stable and safe plant operation and overall optimization is to improve the efficiency and labor saving of device maintenance. Vortex Flowmeters VY Series can support these by the digitalization technology to improve the efficiency of maintenance work and the unique sensing structure with excellent maintainability.
This article concisely explains measurement principles of vortex flowmeters and the objects they measure.
Unbalanced velocity distribution and fluid turbulence in a pipe disturb Karman Vortices and affect the accuracy of flow measurement. Therefore, straight pipe lengths are needed. This article shows the reasons why straight pipe lengths are necessary, using flow simulation and VY Series Vortex Flowmeters as examples.
Downloads
Brochures
- Vortex Flowmeter VY Series (9.2 MB)
- Application for the Marine industry (6.0 MB)
Instruction Manuals
- Vortex Flowmeter VY Series Read Me First (1.1 MB)
- Vortex Flowmeter VY Series Installation Manual (5.4 MB)
- Vortex Flowmeter VY Series Safety Manual (345 KB)
- Vortex Flowmeter VY Series Maintenance Manual (2.6 MB)
- Vortex Flowmeter VY Series HART Communication Type (2.6 MB)
- Vortex Flowmeter VY Series FOUNDATION Fieldbus Communication Type (3.9 MB)
- Vortex Flowmeter VY Series Korean Explosion Protection Type [Korean Version] (1.2 MB)
- Vortex Flowmeter VY Series Modbus Communication Type (3.1 MB)
- Vortex Flowmeter VY Series FM (USA) Explosion Protection Type (581 KB)
- Vortex Flowmeter VY Series FM (Canada) Explosion Protection Type (580 KB)
- Vortex Flowmeter VY Series ATEX Explosion Protection Type (916 KB)
- Vortex Flowmeter VY Series IECEx Explosion Protection Type (965 KB)
- Vortex Flowmeter VY Series INMETRO Explosion Protection Type (995 KB)
General Specifications
Technical Information
- Vortex Flowmeter VY Series (1.5 MB)
- FMEDA YEWFLO TI YEC 21-01-069 R002 V2R1 (626.3 KB)
- FMEDA YEWFLO TI YEC 20-04-072 R001 V2R2 (0.9 MB)
Certificates
Drawings
- Vortex Flowmeter VY Series, VY4A, Remote Transmitter (1.1 MB)
- Vortex Flowmeter VY Series, VY015, VY025, VY040, General Type Process, Connection: ASME Wafer (1.2 MB)
- Vortex Flowmeter VY Series, VY050, VY080, VY100, General Type, Process Connection: ASME Wafer (1.2 MB)
- Vortex Flowmeter VY Series, VY015, VY025, VY040, General Type, Process Connection: EN Wafer (1.2 MB)
- Vortex Flowmeter VY Series, VY050, VY080, VY100, General Type, Process Connection: EN Wafer (1.2 MB)
- Vortex Flowmeter VY Series, VY015, VY025, VY040, General Type, Process Connection: JIS Wafer (1.2 MB)
- Vortex Flowmeter VY Series, VY050, VY080, VY100, General Type, Process Connection: JIS Wafer (1.2 MB)
- Vortex Flowmeter VY Series, VY015, VY025, VY040, General Type, Process Connection: ASME Flange (1.2 MB)
- Vortex Flowmeter VY Series, VY050, VY080, VY100, General Type, Process Connection: ASME Flange (1.2 MB)
- Vortex Flowmeter VY Series, VY150, VY200, General Type, Process Connection: ASME Flange (1.2 MB)
- Vortex Flowmeter VY Series, VY250, VY300, VY400, General Type, Process Connection: ASME Flange (1.2 MB)
- Vortex Flowmeter VY Series, VY015, VY025, VY040, General Type, Process Connection: EN Flange (880 KB)
- Vortex Flowmeter VY Series, VY050, VY080, VY100, General Type, Process Connection: EN Flange (881 KB)
- Vortex Flowmeter VY Series, VY150, VY200, General Type, Process Connection: EN Flange (849 KB)
- Vortex Flowmeter VY Series, VY015, VY025, VY040, General Type, Process Connection: JIS Flange (1.2 MB)
- Vortex Flowmeter VY Series, VY150, VY200, General Type, Process Connection: JIS Flange (1.2 MB)
- Vortex Flowmeter VY Series, VY050, VY080, VY100, General Type, Process Connection: JIS Flange (1.2 MB)
- Vortex Flowmeter VY Series, VY250, VY300, VY400, General Type, Process Connection: JIS Flange (1.2 MB)
- Vortex Flowmeter VY Series, VY025, VY040, VY050, Reduced Bore Type (1 Size Reduction), Process Connection: ASME Flange (998 KB)
- Vortex Flowmeter VY Series, VY080, VY100, VY150, Reduced Bore Type (1 Size Reduction), Process Connection: ASME Flange (1.2 MB)
- Vortex Flowmeter VY Series, VY200, Reduced Bore Type (1 Size Reduction), Process Connection: ASME Flange (1.2 MB)
- Vortex Flowmeter VY Series VY025, VY040, VY050 Reduced Bore Type (1 Size Reduction) Process Connection: EN Flange (1021 KB)
- Vortex Flowmeter VY Series VY080, VY100, VY150 Reduced Bore Type (1 Size Reduction) Process Connection: EN Flange (874 KB)
- Vortex Flowmeter VY Series VY200 Reduced Bore Type (1 Size Reduction) Process Connection: EN Flange (839 KB)
- Vortex Flowmeter VY Series, VY025, VY040, VY050, Reduced Bore Type (1 Size Reduction), Process Connection: JIS Flange (998 KB)
- Vortex Flowmeter VY Series, VY080, VY100, VY150, Reduced Bore Type (1 Size Reduction), Process Connection: JIS Flange (1.2 MB)
- Vortex Flowmeter VY Series, VY200, Reduced Bore Type (1 Size Reduction), Process Connection: JIS Flange (1.2 MB)
- Vortex Flowmeter VY Series, VY040, VY050, VY080, Reduced Bore Type (2 Size Reduction), Process Connection: ASME Flange (993 KB)
- Vortex Flowmeter VY Series, VY100, VY150, VY200, Reduced Bore Type (2 Size Reduction), Process Connection: ASME Flange (1.2 MB)
- Vortex Flowmeter VY Series, VY040, VY050, VY080, Reduced Bore Type (2 Size Reduction), Process Connection: JIS Flange (993 KB)
- Vortex Flowmeter VY Series, VY100, VY150, VY200, Reduced Bore Type (2 Size Reduction), Process Connection: JIS Flange (1.2 MB)
- Vortex Flowmeter VY Series, VY025, VY040, VY050, High Pressure Reduced Bore Type (1 Size Reduction), Process Connection: ASME Fl (959 KB)
- Vortex Flowmeter VY Series, VY080, VY100, VY150, High Pressure Reduced Bore Type (1 Size), Process Connection: ASME Flange (959 KB)
- Vortex Flowmeter VY Series VY015 Dual-Sensor (Welded) General Type Process Connection: ASME Flange (1023 KB)
- Vortex Flowmeter VY Series VY025, VY040, VY050 Dual-Sensor (Welded) General Type Process Connection: ASME Flange (1.0 MB)
- Vortex Flowmeter VY Series VY080, VY100 Dual-Sensor (Welded) General Type Process Connection: ASME Flange (1022 KB)
- Vortex Flowmeter VY Series VY150, VY200 Dual-Sensor (Welded) General Type Process Connection: ASME Flange (995 KB)
- Vortex Flowmeter VY Series VY015 Dual-Sensor (Welded) General Type Process Connection: EN Flange (1022 KB)
- Vortex Flowmeter VY Series VY025, VY040, VY050 Dual-Sensor (Welded) General Type Process Connection: EN Flange (1022 KB)
- Vortex Flowmeter VY Series VY080, VY100 Dual-Sensor (Welded) General Type Process Connection: EN Flange (1021 KB)
- Vortex Flowmeter VY Series VY150, VY200 Dual-Sensor (Welded) General Type Process Connection: EN Flange (994 KB)
동영상
The self-diagnostic and remote maintenance functions support Condition Based Maintenance, which performs efficient and planned maintenance. Inherited YEWFLO's sensing structure brings robustness and long term stability.
2D/3D Configurator
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