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Home /Products/Pneumatic Control Valves/Fluid Control Supplier LN81 Series China Single Seat Pneumatic Control Valve Masoneilan SVI2 SVI3 Digital Valve Positioner

Fluid Control Supplier LN81 Series China Single Seat Pneumatic Control Valve Masoneilan SVI2 SVI3 Digital Valve Positioner

1
MOQ
US $2000.00 - 2500.00/ Set
Price
Fluid Control Supplier LN81 Series China Single Seat Pneumatic Control Valve Masoneilan SVI2 SVI3 Digital Valve Positioner
Features Gallery Product Description Request A Quote
Features
Specifications
Customized Support: OEM
Nominal Diameter: DN15 ~ DN400
Nominal Pressure: PN16/25/40/63/100
Operating Temperature: -196°C To 593°C
Flow Characteristics: Equal Percentage, Linear, Quick-opening
Adjustable Ratio: 30:1, 50:1, 100:1
Basic Infomation
Place of Origin: China
Brand Name: China
Model Number: customized
Payment & Shipping Terms
Delivery Time: 90 work days
Payment Terms: T/T
Product Description

China LN81 Series Single Seat Control Valve and Masoneilan SVI3 Valve Positioner​

Product Introduction​

The SUPCON LN81 series single - seat control valve, as a key terminal actuator in the industrial process control system, mainly consists of an actuator and a regulating mechanism. There is only one valve core and one valve seat in its valve body. The valve stem drives the valve core to move linearly to accurately change the flow area, thereby precisely regulating parameters such as fluid pressure, temperature, flow rate, and liquid level. This control valve has excellent sealing performance, with an extremely low standard leakage rate, ≤0.01% of the rated flow coefficient, which can effectively meet the requirements of strict shut - off scenarios.​
The Masoneilan SVI3 valve positioner is an important accessory for the control valve. It is based on advanced microprocessor technology and can accurately convert the standard current or voltage signal output by the controller (such as a 4 - 20mA current signal or a 1 - 5V voltage signal) into a pneumatic signal to drive the control valve. At the same time, it uses its non - contact position sensing technology to monitor the valve stem displacement in real - time and feedback it to the control system, ensuring that the opening of the control valve accurately corresponds to the control signal.​
When the SUPCON LN81 series single - seat control valve and the Masoneilan SVI3 valve positioner are used in combination, they complement each other. The SVI3 valve positioner can increase the output power of the control valve, reduce the transmission lag of the adjustment signal, accelerate the movement speed of the valve stem, overcome the friction of the valve stem and the unbalanced force generated by the pressure fluctuation of the medium, making the positioning of the LN81 series single - seat control valve more accurate and its regulation performance more excellent, providing an efficient and reliable solution for fluid control in the industrial production process.​

Features​

Features of the LN81 Series Single - Seat Control Valve​
  1. High Sealing Performance: The structure with only one valve core and one valve seat is easy to achieve strict sealing. It can adopt metal - to - metal hard sealing or metal - to - PTFE and other composite material soft sealing, effectively reducing the leakage rate and being suitable for working conditions with strict leakage requirements.​
  1. High Adjustment Accuracy: The precise control of the valve core position through the linear movement of the valve stem can accurately adjust the fluid flow rate to meet the high - precision flow control requirements in industrial production processes.​
  1. Simple Structure: The overall structure is relatively simple, reducing the number of parts, lowering the probability of failures, and facilitating installation, maintenance, and overhaul.​
Features of the Masoneilan SVI3 Valve Positioner​
  1. Intelligent Diagnostic Function: It has a newly integrated advanced online valve diagnostic function, which can monitor the operating status of the valve in real - time, evaluate its performance and reliability. It can detect potential problems in advance, such as valve stroke deviation, over - limit, and cumulative over - limit, and send out alarm information, facilitating maintenance personnel to take timely measures and reducing equipment failure downtime.​
  1. Automatic Calibration: It has an automatic one - key calibration (SMART CAL) function, which simplifies the debugging process, reduces the complexity and time cost of manual debugging, and improves work efficiency.​
  1. Multiple Communication Integrations: It fully supports the HART 7 version communication protocol, can be seamlessly integrated with all mainstream DCSs, and also has integrated I/O, eliminating the need for additional bolt - on accessories. It is convenient to connect with various control systems for remote monitoring and control.​
  1. Adapt to Various Environments: The design of XP and IS - intrinsically safe and explosion - proof integration makes it suitable for various dangerous and ordinary industrial environments, ensuring stable operation in different scenarios.​
Features of the Combination​
  1. Precise Control: The combination of the two enables the positioner to accurately control the opening of the control valve, resulting in higher flow control accuracy, effectively ensuring the stability of the production process and product quality, with a control accuracy of up to ±0.5%.​
  1. Rapid Response: The SVI3 positioner reduces signal transmission lag and accelerates the movement speed of the valve stem, allowing the control valve to quickly respond to control signals and meet the demand for rapid flow adjustment in industrial production.​
  1. Overcome Complex Working Conditions: The positioner can overcome the influence of valve stem friction, medium unbalanced force, and complex working conditions such as high temperature, high pressure, and high viscosity on the control valve, ensuring the normal operation of the LN81 series single - seat control valve under various harsh conditions.​

Applications​

  1. Chemical Industry: In the chemical production process, the transportation of many corrosive and dangerous chemicals is involved. This combination can reliably regulate the flow of various chemicals in chemical pipelines, prevent safety accidents such as leaks, and ensure the safe and efficient transportation of chemicals. It is widely used in sub - fields of the chemical industry such as petrochemicals, fine chemicals, and chemical pharmaceuticals.​
  1. Oil and Gas Industry: Due to the sensitivity of oil and gas products, this industry has extremely high requirements for the accuracy and efficiency of fluid control. This combination can ensure the safe and efficient transmission of oil and gas in all links of extraction, transportation, and processing, which is of great significance for ensuring the economic benefits of oil and gas production and reducing the negative environmental impact.​
  1. Power Industry: In the power generation process, it is necessary to accurately control the flow of media such as steam, water, and fuel. The combination of the SUPCON LN81 series single - seat control valve and the Masoneilan SVI3 valve positioner can achieve precise control of related valves, ensure the stable operation of power generation equipment, and improve energy conversion efficiency. It is suitable for various power generation scenarios such as thermal power, hydropower, and nuclear power.​
  1. Water Supply and Sewage Treatment Systems: In systems such as urban water supply and sewage treatment, it is necessary to accurately control the flow and pressure of water. This combination can achieve precise control of water pumps, valves, and other equipment, ensure stable water supply and normal water pressure. At the same time, it helps to optimize the sewage treatment process and improve water resource utilization efficiency.​
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