FIELDVUE Fisher DVC6200 Series Valve Positioners are FISHER's next-generation high-performance valve controllers in response to market demand and as an alternative to the DVC6000 Series, combining the technical expertise of the existing series, using 50,000 units of DVC2000 Series proven non-contact valve position feedback measurement and DVC6000 Series flameproof/intrinsically safe housings and pneumatic architecture, with electronic components that continue the existing on-board microprocessor, application software and functional modules. In addition, it can adapt to all installation connection modes, support mainstream fieldbus communication and use of embedded AMS ValveLink predictive maintenance, which is easy to integrate into the system, and has high applicability and high reliability, which can provide users with additional benefits.
EMERSON-Fisher, a leader in the development of digital intelligent valve positioners, introduced the FIELDVUE DVC (Digital Valve Controllers, abbreviated for DVC) 20 years ago in 1992.
When the control valve is put into use, it is usually connected by flange or welded to different locations in the process pipeline. During the normal operation of the process system, it is difficult to obtain effective operating status information by observing the operating status of the control valve on site. As a result, it is difficult to predict possible problems with the control valve. When the control effect of the control valve is abnormal, it is difficult to obtain effective diagnostic information if the valve cannot be disassembled online or offline.
Through the monitoring of valve operating status parameters, combined with the valve information preset in the positioner at the factory, the performance diagnostic test and its functions mainly include:
(1) Diagnosis of air supply pressure
Through the diagnostic analysis of the air supply pressure, it is possible to know whether the air supply pressure of the actuator meets the requirements of use, and at the same time, it can monitor and quantitatively analyze the degree of instantaneous air supply pressure drop of the actuator when the valve is moving in large displacement, so as to help determine whether the flow rate of the air supply pipeline is sufficient.
(2) Relay adjustment diagnosis (for cylinder actuators)
This function can monitor the cross pressure of the upper and lower cylinders of the double-acting actuator in real time. At the same time, it also helps to reasonably set the cross-pressure of the large-volume actuator. Too small cross pressure will cause the stiffness of the actuator to deteriorate, and the valve stem and spool assembly are prone to abnormal vibration under the action of fluid force, resulting in the difficulty of stabilizing the spool position. Excessive cross pressure will cause the pressure in the upper and lower cylinders to be close to the supply pressure, so that the piston will be very close to the upper and lower forces, the spring force will play a dominant role, and the actuator will move towards the spring failure position.
(3) Electrical converter I/P and relay integrity diagnosis
This diagnostic function can detect problems with the internal components of electrical converters and amplifiers in a timely manner. For example, if the nozzle of the electrical converter is clogged, if the sealing diaphragm is failing, if the O-ring is failing, and if the I/P calibration drifts. This diagnosis helps to detect problems caused by contamination of the supplied air and excessive temperatures.
(4) Diagnosis of stroke deviation
This diagnostic function is primarily used to monitor actuator pressure as well as differences in stroke feedback and set points. Diagnostics can help identify control trim sticking or wear that is causing the valve to not close properly, or to have internal leaks, or drift in stroke calibration.
(5) Air flow diagnosis
This diagnostic function measures the flow of air through the control valve assembly. With the help of multiple sensors in the positioner, it is possible to detect both positive (supply) and negative (exhaust) pressure from the DVC. This diagnostic not only detects leaks in the actuator and associated air supply lines, but also in the case of cylinder-piston actuators, air flow diagnostics can effectively detect leaks in piston seals or damage to O-rings.
(6) One-click scanning
This feature automates all advanced performance diagnostic tests and provides analysis results that can help identify health issues with the base stations themselves and recommend maintenance.
(7) Valve friction analysis
This diagnostic function analyzes the friction and dead zone of the valve online to help detect changes in packing friction. Severe packing wear can lead to less friction and therefore a risk of leakage. Wear or sticking of the spool sealing rings can also cause friction to change. A change in the dead band can severely affect the overall control performance of the valve, and the response speed may be slower.
By running the advanced diagnostic functions of the smart locator described above, its diagnostic results can provide users with a comprehensive and reliable comprehensive solution from the following five aspects:
(1) Identification of problem valves
Combined with the diagnostic results, the user can locate in advance valves in the process system that are not functioning properly, or that are starting to degrade/deteriorate in performance.
(2) Analysis of problem valve trims
Based on the diagnostic results, the user can identify the health status of the valve trim and whether it needs to be repaired or replaced.
3) The person in charge of the maintenance of the problem valve
Based on the diagnostic results, the user can identify the complexity of the problem.
(4) Problematic valve maintenance time
The user determines the appropriate maintenance time based on the severity of the diagnosis results and the availability of spare parts in the factory, the parking schedule or the maintenance personnel arrangement. Under the premise of not affecting the operation and cost of the process system, each problem valve has the best maintenance time.
As one of the key components affecting the control accuracy of the process system, the health status of the control valve has a decisive impact on the stable operation of the process system. The intelligent positioner can perform online performance diagnosis and evaluate the health status of the control valve, helping users to achieve the goal of further reducing the maintenance cost of the control valve and making the process system more efficient and safe.
|
More on that
|
Fisher Fisher - Electric Actuator Selection
Electric actuator, also known as valve electric device, it is a name in different industries, called valve electric device in the industrial pipeline valve industry, and called electric actuator in the instrument industry, but now there is no clear distinction in the industry.
|
|
Fisher - Control and classification of Fisher controllers
When the Fisher controller is in use, we need to understand the classification of the controller and the control method of the controller. Through an in-depth understanding of the controller, we will be more proficient and convenient in use. Then the editor below will introduce these two aspects for us.
Fisher Controller's ...
|
|
Emerson Fisher Positioners - Emerson introduces smart valve positioners for a wide range of environmental conditions
Emerson's TopWorxTM PD series uses Hall effect technology to reliably detect and control valve position.
Emerson's TopWorxTM PD series is designed for demanding applications.
Hall effect technology is used to reliably detect and control valve position.
High resolution imag ...
|
|
Fisher - Valve installation, maintenance, and operation
To extend the life of a Fisher valve, most of us pay attention to installation and maintenance, but operation is also important. For valves, it is necessary to be able not only to install and maintain, but also to operate. Dongguang valve pointed out: valve installation, maintenance, operation, no one is missing...
|
|
Fisher Fisher - Butterfly Valve Test & Installation & Troubleshooting
1. Testing and adjustment
1. Whether it is manual, pneumatic, hydraulic or electric, all parts of this product have been seriously debugged before leaving the factory, and the user should uniformly fix both ends of the import and export when re-checking the sealing function
Fixed, close the disc valve, apply pressure to the inlet side, and check whether there is any leakage on the outlet side, ...
|
|
Fisher – Fisher – Valve positioner hardware system design
The system hardware design of the valve positioner needs to reduce the interference between the analog ground and the digital ground, and at the same time make full use of the internal space of the positioner housing to divide the hardware system into two parts: the main control board and the interface board.
Among them, the main control board of the valve positioner includes a single-chip microcomputer Z small system and a human-computer interaction model.
|
|
Fisher introduces a digital valve controller
Emerson Fisher Fisher introduces the Fisher FIELDVUE DVC6200 Digital Valve Controller with Stainless Steel Housing for Corrosive Environmental Conditions The stainless steel housing and sealing structure protect components from corrosion damage
By equipping not ...
|
|
Debugging steps for the Fisher Locator (DVC6200).
The Fisher Positioner DVC6200 is Emerson's valve-mounted, digital valve controller that intelligentizes the entire control valve assembly. Take control of your process with important, real-time information that can be accessed from anywhere in the loop. Also able to get a problem before it becomes ...
|
|
Fisher Flow Amplifier ASCO 614 Series Solutions
The Fisher/fisher ASCO Series 614 SentronicPlus is a digitally operated, three-way proportional regulator. Adjustable pressure, flow, force, speed, and linear or angular position. Air and inert gas media can be controlled. According to the ATEX Directive 2014/34/EU, its structure ...
|
|
Fisher - Fisher's FAQs
In the use of Fisher Valve Positioner Control Valve, we may encounter some different situations, such as: positioner signal conditioner force instability, pneumatic valve source regulator force instability, positioner without pneumatic valve, etc., the following editors will introduce these situations.
Fisher Fisher ...
|
|
Common faults and troubleshooting methods of valves--fisher valves
The valve may leak during use or installation, due to frequent opening and closing during use, or not installed as required and other reasons, resulting in the valve can not work normally, the following small valve will explain the cause of valve leakage and treatment methods for you
During the construction period, the valve leaked ...
|
|
Fisher Fisher-1098EGR and 1098H-EGR Decompression Regulators
The Fisher Model 1098-EGR and 1098H-EGR regulators provide economical and accurate pressure control in a variety of applications; natural gas distribution systems; gas supply for industrial boilers, furnaces, ovens and mixers; and large commercial/industrial establishments such as shopping malls and schools. They are also used in industrial ...
|
|
Fisher Series 67 Direct Acting Regulator Features:
Fisher Series 67 Direct Acting Regulator Features:
Compact structure - 67C series regulators have outstanding performance in redesign, compact structure and light weight;
Panel Mount - The panel mount structure consists of a handwheel adjustment screw equipped with another 1/4NPT vent, spring box and mounting ...
|
|
Fisher Fisher - Introduction to commonly used valve sealing face materials
1. Soft sealing material
(1) Butadiene rubber (NBR). Butadiene rubber has excellent oil resistance; The heat resistance is better than that of natural rubber and styrene-butadiene rubber; Good air tightness and water resistance. Dingjing rubber can be divided into Dingjing-18, Dingjing-26 and Dingjing-40. Xiangjing rubber is suitable for temperatures from -60 to +120 degrees ...
|
|
Fisher Fisher - Intelligent pressure regulation and metering solutions for gas companies
In the past operation of natural gas pressure regulating system, terminal equipment such as pressure regulating cabinets, pressure regulating boxes, and pipelines in the distribution network have always been a relatively weak part of the monitoring means. As a result, problems such as non-troubleshooting and emergency gas shutdown accidents also make consumers and operators feel painful. Meanwhile...
|
|
Fisher pneumatic control valve working principle, mode of action, installation principle
How Fisher Pneumatic Control Valves Work:
Pneumatic control valve is usually composed of pneumatic actuator and control valve connection, installation and commissioning, pneumatic actuator can be divided into single-acting and double-acting two-acting, single-acting actuator has a return spring, and double-acting actuator has no return spring. ...
|
|
Fisher Fisher - Causes and Treatments for Internal Leakage in Electric Control Valves
Electric control valves have been more and more widely used in various industrial control systems due to their high control accuracy, convenient installation and commissioning. However, in the process of use, there are also some problems that plague field instrument personnel, that is, the problem of valve leakage. Here we will explore the electric ...
|
|
Emerson has appointed Peter Zornio as Chief Technology Officer
Zornio, a veteran automation and software leader, drives Emerson's innovation and technology strategy
ST. LOUIS (November 29, 2022) – Emerson (NYSE: EMR), a global leader in automation technology and software, has appointed Peter Zornio as a ...
|
|
Applications and prospects of Fisher DVC6200 valve positioner in the chemical industry
Fisher DVC6200 valve positioner has been fully verified in the global market and the quality of trustworthy and reliable products, has made a great contribution to industrial automation fluid control, visible industries are petroleum, chemical, electric power, paper, pharmaceutical, steel, water conservancy, ...
|
|
Fisher Fisher – What are the causes and ways to eliminate leaks in valve disc and seat seals?
There are two types of leakage between the valve core and the valve seat: 1. Damaged leakage; 2. Valve position leakage.
For metal-sealed valves, breakage leakage refers to the default sealing line between the valve core and the valve seat, which makes the sealing line disconnected.
|
|
Contact
working hours
