# Valves **URL:** https://forumautomation.com/c/field-instrumentation/valves/42.md [Latest](https://forumautomation.com/latest.md) · [Categories](https://forumautomation.com/categories.md) · [Tags](https://forumautomation.com/tags.md) --- ## [Types of Control Valves - Application, Advantages and Disadvantages](https://forumautomation.com/t/types-of-control-valves-application-advantages-and-disadvantages/955)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 5\ **Last updated:** [February 27, 2024, 11:42am UTC](https://forumautomation.com/t/types-of-control-valves-application-advantages-and-disadvantages/955 "2024-02-27T11:42:05Z")
Control Valve The control valve commonly named the final control element of control contains a pneumatic device that convert the control signal from the controller in action regulating the process fluid flow. Valves m… --- ## [What are the usual problems of control valves?](https://forumautomation.com/t/what-are-the-usual-problems-of-control-valves/4702)
**Author:** [@rajeena](https://forumautomation.com/u/rajeena)\ **Replies:** 2\ **Last updated:** [April 22, 2023, 6:30am UTC](https://forumautomation.com/t/what-are-the-usual-problems-of-control-valves/4702 "2023-04-22T06:30:41Z")
What are the usual problems of control valves? The problems of control valves usually manifest themselves as stiction, deadband and hysteresis. Deadband Dead band is also called neutral zone or dead zone. Deadband is … --- ## [List of Important Valve installation standards](https://forumautomation.com/t/list-of-important-valve-installation-standards/6794)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [July 20, 2019, 6:49pm UTC](https://forumautomation.com/t/list-of-important-valve-installation-standards/6794 "2019-07-20T18:49:32Z")
Valve installations are subject to numerous standards and specifications issued by many supporting organizations. Valve standards are vibrant documents representing engineering practices, variations in market requirem… --- ## [Types of control valve positioner](https://forumautomation.com/t/types-of-control-valve-positioner/2912)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [January 2, 2018, 7:03pm UTC](https://forumautomation.com/t/types-of-control-valve-positioner/2912 "2018-01-02T19:03:39Z")
What are valve positioners? Valve Positioners are devices used to put the valve in the correct position by increasing or decreasing the air load pressure on the actuator. Valve positioners are used for controlling valv… --- ## [Types of Directional Control Valve (DCV) based on the fluid path control](https://forumautomation.com/t/types-of-directional-control-valve-dcv-based-on-the-fluid-path-control/2645)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 1\ **Last updated:** [May 15, 2020, 4:27pm UTC](https://forumautomation.com/t/types-of-directional-control-valve-dcv-based-on-the-fluid-path-control/2645 "2020-05-15T16:27:45Z")
Directional Control Valves: A Directional Control Valve controls the direction of a fluid in the hydraulic system pass through. The device redirects or stops the fluid flow with the help of internal mechanism in the valv… --- ## [What are Deluge valves?, introduction, operation and What is deluge system,](https://forumautomation.com/t/what-are-deluge-valves-introduction-operation-and-what-is-deluge-system/5077)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [November 1, 2018, 2:39pm UTC](https://forumautomation.com/t/what-are-deluge-valves-introduction-operation-and-what-is-deluge-system/5077 "2018-11-01T14:39:36Z")
What are deluge valves? Deluge valve is used in deluge systems and used for fast application of water in a spray system. Deluge valves are used under conditions that require the rapid application of large volumes of wate… --- ## [What is the difference between Valve positioner and Position transmitter?](https://forumautomation.com/t/what-is-the-difference-between-valve-positioner-and-position-transmitter/643)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [December 4, 2015, 2:14am UTC](https://forumautomation.com/t/what-is-the-difference-between-valve-positioner-and-position-transmitter/643 "2015-12-04T02:14:21Z")
Valve Positioner Valve positioner is responsible for actual accurate positioning of the valve based on PID loop output of 4-20mA DC/0-10 V DC from standalone PID controller or PLC/DCS/BMS loop. It can be electric valve … --- ## [Instrumentation :How to do Valve Sizing](https://forumautomation.com/t/instrumentation-how-to-do-valve-sizing/370)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [March 29, 2015, 7:43am UTC](https://forumautomation.com/t/instrumentation-how-to-do-valve-sizing/370 "2015-03-29T07:43:44Z")
Step 1 - Define System For Example : The system is pumping water from one tank to another through a piping system with a total pressure drop of 150 psi. The fluid is water at 70 0F. Design (maximum) flowrate of 150 g… --- ## [Valve Sequencing in Fieldbus System](https://forumautomation.com/t/valve-sequencing-in-fieldbus-system/2996)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 1\ **Last updated:** [August 8, 2024, 2:05pm UTC](https://forumautomation.com/t/valve-sequencing-in-fieldbus-system/2996 "2024-08-08T14:05:09Z")
\##What is valve sequencing? Sequencing of two valves at different bench set, making each one respond differently to the same air pressure signal. Either the electrical signal or pneumatic signals will be common, cont… --- ## [Control Valve maintenance checklist](https://forumautomation.com/t/control-valve-maintenance-checklist/6083)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [March 14, 2019, 6:47pm UTC](https://forumautomation.com/t/control-valve-maintenance-checklist/6083 "2019-03-14T18:47:20Z")
Control valve in the process industry regulates the flow of fluid passing through pipelines automatically or manually. This control the process speed, reaction, safety etc., So, it is important to maintain the control va… --- ## [What are the types of valve actuators?](https://forumautomation.com/t/what-are-the-types-of-valve-actuators/2470)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [October 17, 2017, 7:59pm UTC](https://forumautomation.com/t/what-are-the-types-of-valve-actuators/2470 "2017-10-17T19:59:25Z")
Actuators are the devices which drive the valve stem. There are different types of valve actuators used in valves according to different purposes and based on actuating principle. There are actuators such as: Pneumat… --- ## [Control valve accessories](https://forumautomation.com/t/control-valve-accessories/2989)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [January 16, 2018, 9:15pm UTC](https://forumautomation.com/t/control-valve-accessories/2989 "2018-01-16T21:15:03Z")
Control valves are used to control or restrict the flow of fluids stream in a closed or open channel. Control valves are an essential part of the most flow process in industrial to increase the productivity, product qual… --- ## [Control valve preventive maintenance](https://forumautomation.com/t/control-valve-preventive-maintenance/4010)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [July 3, 2018, 5:10pm UTC](https://forumautomation.com/t/control-valve-preventive-maintenance/4010 "2018-07-03T17:10:26Z")
There is no doubt that preventive maintenance can improve the performance and safety of control valve function. The control valve maintenance includes inspection of all valve parts, check the condition of auxiliary pi… --- ## [How to Install a pressure reducing valve?](https://forumautomation.com/t/how-to-install-a-pressure-reducing-valve/2432)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [October 11, 2017, 7:00pm UTC](https://forumautomation.com/t/how-to-install-a-pressure-reducing-valve/2432 "2017-10-11T19:00:08Z")
Pressure reducing valve installation setup: Pressure reducing valve reduces the higher inlet pressure to a steady lower pressure at the downstream. Pressure reducing valve is installed in between two isolating valves… --- ## [The Versatility and Reliability of Ball Valves in Various Applications](https://forumautomation.com/t/the-versatility-and-reliability-of-ball-valves-in-various-applications/11252)
**Author:** [@yunus](https://forumautomation.com/u/yunus)\ **Replies:** 0\ **Last updated:** [June 19, 2023, 10:53pm UTC](https://forumautomation.com/t/the-versatility-and-reliability-of-ball-valves-in-various-applications/11252 "2023-06-19T22:53:37Z")
As technology advances and industries evolve, the need for efficient and reliable valve systems becomes increasingly important. One type of valve that has proven its worth time and again is the ball valve. With its simpl… --- ## [Control Valve What is Valve Rangeability?](https://forumautomation.com/t/control-valve-what-is-valve-rangeability/408)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [April 23, 2015, 10:41pm UTC](https://forumautomation.com/t/control-valve-what-is-valve-rangeability/408 "2015-04-23T22:41:02Z")
Control Valve What is Valve Rangeability ? Rangeability is the ratio of maximum controllable flow to minimum controllable flow For the control valve selection rangeability is one of the important selection factor. Min… --- ## [Control Valve Types](https://forumautomation.com/t/control-valve-types/372)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [March 29, 2015, 8:26am UTC](https://forumautomation.com/t/control-valve-types/372 "2015-03-29T08:26:54Z")
Gate Valves Best Suited Control: Quick Opening Recommended Uses: Fully open/closed, non-throttling Infrequent operation Minimal fluid trapping in line Applications: Oil, gas, air, slurries, heavy liquids, steam, n… --- ## [Parts of a Needle valve](https://forumautomation.com/t/parts-of-a-needle-valve/10555)
**Author:** [@Ajmal\_ismail](https://forumautomation.com/u/Ajmal_ismail)\ **Replies:** 0\ **Last updated:** [July 28, 2022, 4:05am UTC](https://forumautomation.com/t/parts-of-a-needle-valve/10555 "2022-07-28T04:05:55Z")
What is a needle valve? A needle valve is used to precisely control the flow of clean gases or fluids. For managing the flow rate, the modifications are progressive and smooth. They can also function as a dependable shu… --- ## [Control valve specifications and selection requirements](https://forumautomation.com/t/control-valve-specifications-and-selection-requirements/7505)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [December 3, 2019, 6:49pm UTC](https://forumautomation.com/t/control-valve-specifications-and-selection-requirements/7505 "2019-12-03T18:49:58Z")
Control valves are the most widely used control element in every kind of process industry. Control valve selected for an application should be the perfect combination of specifications including valve body, material, … --- ## [Basics of Industrial Globe valves](https://forumautomation.com/t/basics-of-industrial-globe-valves/2553)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [November 2, 2017, 6:54pm UTC](https://forumautomation.com/t/basics-of-industrial-globe-valves/2553 "2017-11-02T18:54:58Z")
Globe valves are control valves used to regulate the flow in a stream of water. The disk shown in the figure controls the flow through it. The disk which is suit to the seat moves up and down to control the flow. The… --- ## [Emergency shutdown valve](https://forumautomation.com/t/emergency-shutdown-valve/4517)
**Author:** [@rajeena](https://forumautomation.com/u/rajeena)\ **Replies:** 3\ **Last updated:** [December 7, 2023, 4:21am UTC](https://forumautomation.com/t/emergency-shutdown-valve/4517 "2023-12-07T04:21:38Z")
What is Emergency shutdown valve? The function of the shutdown valve is to shut-off the fluid flow inside the fluid flow line or pipe when an emergency that leads to a hazardous situation comes. It is an actuator operate… --- ## [What is cavitation and Flashing? What cause cavitation?](https://forumautomation.com/t/what-is-cavitation-and-flashing-what-cause-cavitation/6977)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [August 16, 2019, 6:05pm UTC](https://forumautomation.com/t/what-is-cavitation-and-flashing-what-cause-cavitation/6977 "2019-08-16T18:05:31Z")
Cavitation and flashing occur where there is an orifice in the pipeline because of any kind of obstructions such as valves & flowmeters. Thus such phenomenons can appear in any types of flow arrangements, here we try to … --- ## [Basics of Control Valves and Parts of Control Valve](https://forumautomation.com/t/basics-of-control-valves-and-parts-of-control-valve/392)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [April 12, 2015, 2:27am UTC](https://forumautomation.com/t/basics-of-control-valves-and-parts-of-control-valve/392 "2015-04-12T02:27:28Z")
Control valve is a Final control element .Final control elements are necessary to control the Process variable. Valves are used to control the flow of fluid in process system. Main parts of Control valve are Valve Body … --- ## [What is three valve manifold? | how a 3 valve manifold works?](https://forumautomation.com/t/what-is-three-valve-manifold-how-a-3-valve-manifold-works/2482)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 2\ **Last updated:** [October 21, 2017, 8:09am UTC](https://forumautomation.com/t/what-is-three-valve-manifold-how-a-3-valve-manifold-works/2482 "2017-10-21T08:09:41Z")
Differential pressure transmitters are used in level measurement and flow measurement. For ensuring the protection of pressure transmitter or for isolating the transmitter from the process loop, manifolds are used. Th… --- ## [Working of Self-operated valve](https://forumautomation.com/t/working-of-self-operated-valve/2721)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [November 25, 2017, 8:18pm UTC](https://forumautomation.com/t/working-of-self-operated-valve/2721 "2017-11-25T20:18:39Z")
A “control valve” works to restrict the flow of fluid through a pipe at the command of a remotely sourced signal, such as the signal from a loop controller or logic device. A self-operated valve regulates the flow by its… --- ## [What are the different types of valves?](https://forumautomation.com/t/what-are-the-different-types-of-valves/2478)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [October 19, 2017, 8:20pm UTC](https://forumautomation.com/t/what-are-the-different-types-of-valves/2478 "2017-10-19T20:20:42Z")
Valves are devices used to control the flow of a fluid stream. There are different kinds of valves used in plants based on the needs. Basically, Valves can be grouped into two main types: Shut off valves: They are ON… --- ## [How to decide control valve body material ? (WCC or WBB)](https://forumautomation.com/t/how-to-decide-control-valve-body-material-wcc-or-wbb/1324)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [September 4, 2016, 6:52am UTC](https://forumautomation.com/t/how-to-decide-control-valve-body-material-wcc-or-wbb/1324 "2016-09-04T06:52:46Z")
The different of WCA,WCB and WCC is made of different steel grade. C is better than B, B better than A. all there had different temperature and strength rating. As for valve body selection (according to ISA) “Control va… --- ## [What is valve lapping? Procedure for lapping](https://forumautomation.com/t/what-is-valve-lapping-procedure-for-lapping/5752)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [January 18, 2019, 12:09pm UTC](https://forumautomation.com/t/what-is-valve-lapping-procedure-for-lapping/5752 "2019-01-18T12:09:13Z")
Lapping is the process of cleaning the control valve for maintenance purposes. The lapping is done with compounds that has roughness, and used to clean valve disc and nozzle seats etc., Every seat and disc from a rel… --- ## [Control valve symbols in P&id](https://forumautomation.com/t/control-valve-symbols-in-p-id/10897)
**Author:** [@Instrument\_Engineer](https://forumautomation.com/u/Instrument_Engineer)\ **Replies:** 0\ **Last updated:** [February 22, 2023, 6:02am UTC](https://forumautomation.com/t/control-valve-symbols-in-p-id/10897 "2023-02-22T06:02:44Z")
Control valves are used in process control systems to regulate the flow of fluid, gas or steam. These symbols are used in process flow diagrams, P&IDs (piping and instrumentation diagrams), and other engineering draw… --- ## [What is Blowdown Valve?](https://forumautomation.com/t/what-is-blowdown-valve/4521)
**Author:** [@rajeena](https://forumautomation.com/u/rajeena)\ **Replies:** 0\ **Last updated:** [September 1, 2018, 11:23am UTC](https://forumautomation.com/t/what-is-blowdown-valve/4521 "2018-09-01T11:23:49Z")
Blowdown Valve Blowdown valves are commonly used in boilers in order to drain dissolved solids from the boiler water. These valves are fitted on the drain lines of the boilers. One or multiple blowdown valves are used in… --- ## [What is Valve manifold? Explain about 3 way and 5 way valve manifold](https://forumautomation.com/t/what-is-valve-manifold-explain-about-3-way-and-5-way-valve-manifold/2718)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [November 24, 2017, 9:19pm UTC](https://forumautomation.com/t/what-is-valve-manifold-explain-about-3-way-and-5-way-valve-manifold/2718 "2017-11-24T21:19:48Z")
The valves manifolds are devices that are associated with the DP transmitter, The device isolates the DP transmitter from the process, for maintenance and calibration process. There are 3 valve manifold and 5 valve mani… --- ## [Application of Digital Valve controller](https://forumautomation.com/t/application-of-digital-valve-controller/6006)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [March 1, 2019, 6:04pm UTC](https://forumautomation.com/t/application-of-digital-valve-controller/6006 "2019-03-01T18:04:29Z")
What is the digital valve controller? The Digital Valve Controller is smart controller and attached to the valve actuator that controls and monitors the operation of the valve. The DVC can operate in protocol 4 - 20mA, H… --- ## [How to protect control valve in case of fire?](https://forumautomation.com/t/how-to-protect-control-valve-in-case-of-fire/6471)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [May 30, 2019, 6:03pm UTC](https://forumautomation.com/t/how-to-protect-control-valve-in-case-of-fire/6471 "2019-05-30T18:03:16Z")
What happens when the valve caught fire? When a fire breaks out, the pneumatic actuator’s fail-safe position will be adversely affected. The high temperatures result in the springs losing their strength. As the tem… --- ## [What are the difference between PSV and PRV?](https://forumautomation.com/t/what-are-the-difference-between-psv-and-prv/4539)
**Author:** [@rajeena](https://forumautomation.com/u/rajeena)\ **Replies:** 0\ **Last updated:** [September 3, 2018, 5:35pm UTC](https://forumautomation.com/t/what-are-the-difference-between-psv-and-prv/4539 "2018-09-03T17:35:47Z")
What are PSV and PRV? PSV is a pressure safety valve and PRV is a pressure relief valve. Both are used for process safety. So it is important that an engineer must know about PSV and PRV. They make the decision about whi… --- ## [Control valve positioner and its working](https://forumautomation.com/t/control-valve-positioner-and-its-working/2822)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [December 15, 2017, 7:49pm UTC](https://forumautomation.com/t/control-valve-positioner-and-its-working/2822 "2017-12-15T19:49:33Z")
Valve Positioners are devices used to put the valve in the correct position by increasing or decreasing the air load pressure on the actuator. Valve positioners are used for controlling valve where accurate and rapid co… --- ## [Control Valve Symbols](https://forumautomation.com/t/control-valve-symbols/10495)
**Author:** [@Ajmal\_ismail](https://forumautomation.com/u/Ajmal_ismail)\ **Replies:** 0\ **Last updated:** [June 23, 2022, 4:26am UTC](https://forumautomation.com/t/control-valve-symbols/10495 "2022-06-23T04:26:02Z")
What are the common symbols used in Piping and Instrumentation Diagram (P&ID)? Piping and Instrumentation Diagram are also known as P&ID, it shows the diagram of the piping and related components of a physical flow. It … --- ## [Symbols of different types of Pressure Relief Valves](https://forumautomation.com/t/symbols-of-different-types-of-pressure-relief-valves/1289)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [August 28, 2016, 4:26pm UTC](https://forumautomation.com/t/symbols-of-different-types-of-pressure-relief-valves/1289 "2016-08-28T16:26:38Z")
Symbols of Pressure Relief valve used in different Instrumentation diagram. 1.Pilot operated, balanced piston relief valve \ **Author:** [@instrumentationtechi](https://forumautomation.com/u/instrumentationtechi)\ **Replies:** 1\ **Last updated:** [June 30, 2021, 10:24am UTC](https://forumautomation.com/t/what-is-an-air-to-open-and-air-to-close-control-valve/9551 "2021-06-30T10:24:17Z") Explain the air to open and air to close control valve --- ## [Safety valve - Construction](https://forumautomation.com/t/safety-valve-construction/4509)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [August 30, 2018, 4:36pm UTC](https://forumautomation.com/t/safety-valve-construction/4509 "2018-08-30T16:36:53Z")
The pressure safety valves are used to protect the equipment such as motors, pumps and compressors. The safety valve releases the excess pressure out that can affect the equipment harmfully. Construction safety valve: … --- ## [What is Temperature Control Valve (TCV)?](https://forumautomation.com/t/what-is-temperature-control-valve-tcv/7022)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [August 23, 2019, 7:34pm UTC](https://forumautomation.com/t/what-is-temperature-control-valve-tcv/7022 "2019-08-23T19:34:44Z")
A temperature control valve is kind of control valve that maintain the temperature of a desired process at a specific level. The TCV measures the reaction temperature and either raises or reduces the cooling liquid flow … --- ## [What is Control valve stem?](https://forumautomation.com/t/what-is-control-valve-stem/10491)
**Author:** [@Ajmal\_ismail](https://forumautomation.com/u/Ajmal_ismail)\ **Replies:** 0\ **Last updated:** [June 20, 2022, 4:46am UTC](https://forumautomation.com/t/what-is-control-valve-stem/10491 "2022-06-20T04:46:26Z")
What is a Control Valve? A control valve is an electrical device that manages or modifies the flow of fluids such as gas, oil, water, and steam. It is an example of a final control element and a critical component of a … --- ## [What is the difference between monostable and bistable valve](https://forumautomation.com/t/what-is-the-difference-between-monostable-and-bistable-valve/9596)
**Author:** [@instrumentationtechi](https://forumautomation.com/u/instrumentationtechi)\ **Replies:** 1\ **Last updated:** [July 14, 2021, 10:52am UTC](https://forumautomation.com/t/what-is-the-difference-between-monostable-and-bistable-valve/9596 "2021-07-14T10:52:28Z")
Explain how a monostable valve is different from a bistable valve --- ## [What are Digital Valve Controller (DVC)?](https://forumautomation.com/t/what-are-digital-valve-controller-dvc/5746)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [January 17, 2019, 5:55pm UTC](https://forumautomation.com/t/what-are-digital-valve-controller-dvc/5746 "2019-01-17T17:55:21Z")
The Digital Valve Controller is smart and it is attached to the valve actuator, which controls and monitor the valve operation. The DVC is capable of operating in 4-20mA, HART, Fieldbus or Profibus protocol. Functio… --- ## [What is Valve Trim?](https://forumautomation.com/t/what-is-valve-trim/10534)
**Author:** [@Ajmal\_ismail](https://forumautomation.com/u/Ajmal_ismail)\ **Replies:** 0\ **Last updated:** [July 19, 2022, 4:18am UTC](https://forumautomation.com/t/what-is-valve-trim/10534 "2022-07-19T04:18:18Z")
What is Valve? Valve is a device that is designed to control the flow of fluid, liquid, gas, or air through a duct or pipe, etc. The main parts of the valve are Body Bonnet Stem Disk/Wedge Seat, Packings York Bolt … --- ## [Valve maintenance - Gate valve maintenance details](https://forumautomation.com/t/valve-maintenance-gate-valve-maintenance-details/5924)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [February 14, 2019, 2:50pm UTC](https://forumautomation.com/t/valve-maintenance-gate-valve-maintenance-details/5924 "2019-02-14T14:50:34Z")
Gate valves are used for quick opening and shut off. These are the most common types of valve used in process industry suitable to use in large size flow channels. Maintenance of Gate valves: To keep the valve can be us… --- ## [Types of Valves](https://forumautomation.com/t/types-of-valves/10894)
**Author:** [@Sudha\_m](https://forumautomation.com/u/Sudha_m)\ **Replies:** 0\ **Last updated:** [February 20, 2023, 6:08pm UTC](https://forumautomation.com/t/types-of-valves/10894 "2023-02-20T18:08:20Z")
Different types of Valves Valves are mechanical devices that open, close, or partially obstruct various paths in order to regulate, control, or direct the flow of fluids (liquids, gases, or slurries). There different… --- ## [Control valve characteristics/trim](https://forumautomation.com/t/control-valve-characteristics-trim/3062)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [January 31, 2018, 7:11pm UTC](https://forumautomation.com/t/control-valve-characteristics-trim/3062 "2018-01-31T19:11:36Z")
The flow characteristics of a control valve show the rate of flow for the range of valve operation. There are two types of flow characteristics for control valves: Inherent Installed The inherent characteristic is det… --- ## [What are the advantages & disadvantages between a V-port ball valve and a globe valve for controlling the flow, pressure & temperature?](https://forumautomation.com/t/what-are-the-advantages-disadvantages-between-a-v-port-ball-valve-and-a-globe-valve-for-controlling-the-flow-pressure-temperature/11198)
**Author:** [@Sudha\_m](https://forumautomation.com/u/Sudha_m)\ **Replies:** 0\ **Last updated:** [May 29, 2023, 5:22pm UTC](https://forumautomation.com/t/what-are-the-advantages-disadvantages-between-a-v-port-ball-valve-and-a-globe-valve-for-controlling-the-flow-pressure-temperature/11198 "2023-05-29T17:22:20Z")
Consider their benefits and drawbacks in each area when contrasting globe valves versus V-port ball valves for regulating flow, pressure, and temperature: \*\*Flow control\*\* V-Port Ball Valve Advantages of V-Po… --- ## [Basics of Foot valves, Types of foot valves](https://forumautomation.com/t/basics-of-foot-valves-types-of-foot-valves/3245)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [March 7, 2018, 10:45am UTC](https://forumautomation.com/t/basics-of-foot-valves-types-of-foot-valves/3245 "2018-03-07T10:45:53Z")
Functions of foot valves: A foot valve is basically a check valve fitted to the end of a suction pipe leading to a pump. Its purpose is to keep fluid trapped in the suction pipe when the pump stops. thus maintaining… --- ## [Construction and working details of Butterfly valve](https://forumautomation.com/t/construction-and-working-details-of-butterfly-valve/2618)
**Author:** [@sivaranjith](https://forumautomation.com/u/sivaranjith)\ **Replies:** 0\ **Last updated:** [November 10, 2017, 3:09pm UTC](https://forumautomation.com/t/construction-and-working-details-of-butterfly-valve/2618 "2017-11-10T15:09:48Z")
Butterfly valves are used in both heavy and light uses. Butterfly valves are flow regulating, pivoted disc valves. The circular disc or plate, having the same radial dimensions as the pipe is pivoted exactly in the centr… [Next page](https://forumautomation.com/c/field-instrumentation/valves/42.md?page=1&per_page=50)