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Custom Valve Training: Lessons Learned at the LACSD

Custom Valve Training: Lessons Learned at the LACSD

Fifty engineers from the Los Angeles Cou...

Intelligent Servicing of Valves During Aging Plant Shutdowns

Intelligent Servicing of Valves During Aging Plant Shutdowns

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When Valves Get Wet

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Industry Headlines

Philly Fed Manufacturing Shows Continued Expansion

Wednesday, 21 March 2018  |  Chris Guy

Results from the Philadelphia Fed’s March Manufacturing Business Outlook Survey suggest continued growth for the region’s manufacturing se...



Industry Headlines

Metso's Valves Service Center in Turkey Relocates


Metso's valves service center in Turkey has relocated to Söke in the Aegean region to be close to important customer hubs. The new location and larger facilities strengthen Metso's presence and ensure better service availability for customers in an area that has lacked a service center of this vo...


Emerson Supplying Software to Pin Oak Terminals


Pin Oak Terminals, a new hydrocarbon liquids storage and logistics terminal in Mount Airy, LA, has selected Emerson to provide its Synthesis order-to-cash software. Emerson will provide a configured software solution that includes interfaces for operational information, order management, inventory man...


Electricity Generation from Fossil Fuels Declined in 2017


According to U.S. Energy Information Administration’s Electric Power Monthly , total U.S. net electricity generation fell slightly (down 1.5%) in 2017, reflecting lower electricity demand. Natural gas and coal generation fell by 7.7% and 2.5% from 2016, respectively, as generation from several ren...


U.S. Petroleum Demand Near Highest Level in 11 Years


Led by gasoline and seasonal demand for heating fuels, U.S. petroleum demand hit 20.3 million barrels per day in February. According to the American Petroleum Institute, demand was up by more than a million barrels per day from February of last year, nearing record highs not seen for more than a decad...


Philly Fed Manufacturing Shows Continued Expansion


Results from the Philadelphia Fed’s March Manufacturing Business Outlook Survey suggest continued growth for the region’s manufacturing sector. Although the survey’s index for general activity moderated, the indexes for new orders and shipments improved. The survey’s future i...


U.S. Industrial Production Rose 1.1% in February


Industrial production rose 1.1% in February following a decline of 0.3% in January. Manufacturing production increased 1.2% in February, its largest gain since October. Mining output jumped 4.3%, mostly reflecting strong gains in oil and gas extraction.

In February, manufacturing output increased 1.2%....



When Accessories Become Necessities

vmspr10 beyond valves 1This automated valve assembly is made up of a process ball valve, pneumatically operated actuator, solenoid valve and inductive non-contact valve position sensor and target.Specification sheets for selecting automated valves list requirements for the valve and actuator but often lump all other devices together as related instrumentation or accessories.

Since the definition of an automated valve is a flow control device that can be remotely operated, a typical selection hierarchy is:

  1. Select the best valve for the service conditions
  2. Select a suitable actuator to operate that valve
  3. Provide enough information on accessories so the valve supplier or end user can just add them as needed.

A comprehensive valve data sheet may enumerate 40 to 50 line items of information that define the scope of the valve assembly. Since performance and safety of that assembly are greatly impacted if any component in the assembly fails, the more forethought put into the specification, the more likely the final assembly will perform as intended. The purpose of a specification is not to exclude any manufacturer but rather to include only those products the specifier perceives as most closely meeting the equipment application requirements.


If we look at all system devices as necessities instead of accessories, we can divide the specification sheet into three sections.

  1. Under Process Components all devices that are in contact with the media would be listed. That would include the valve and instrumentation such as flow meters and other process variable transmitters.
  2. Under Force all devices that supply the motive power to operate the valve would be listed. This would include the actuator—pneumatic, electric or hydraulic; hand-wheel overrides; linkage kits/mounting brackets; solenoid valves; filter regulators; pressure gauges, etc.
  3. The third column would be headed Intelligence. This category would include valve position sensors. Intelligent devices interface the operator’s commands and the valve’s response. Without supervision/control, the automated valve will not function; therefore, the process will not function.

vmspr10 beyond valves 2The automated valve assembly shown here is for use in a hazardous location. It consists of a process ball valve with pneumatically operated actuator, solenoid valve and inductive NAMUR non-incendive valve position sensor and target. Note that the solenoid valve is driven from the valve position sensor, which simplifies wiring.Valve position sensors indicate to the plant operator that an automated or control valve is open, closed, or between open and closed. A valve position sensor or switch can take numerous forms: inductive proximity sensor, reed switch or mechanical switch. Sensors can be directly mounted to a rotary pneumatic actuator, bracket-mounted to a linear valve, enclosed inside a switch box or an electrically operated actuator, or inside a valve positioner.

An inductive proximity sensor is a non-contact device, which means the sensor is free from wear. A common metal target is mechanically attached to the actuator stem of a linear or rotary travel valve. When the target comes into range of detecting the sensor, an electronic switch changes state, which confirms the position of the valve. Actuation speed or frequency has no effect on inductive proximity sensors. They are typically used in pairs, one for the valve’s open position and another for the closed position, although sensing other positions can be easily accomplished. Dual sensors directly mounted onto a pneumatic actuator provide valve open and valve closed switching in one compact package. Proximity sensors are available in a variety of configurations and voltages and can be an integral part of a valve assembly, especially when the sensor’s full capabilities are utilized.

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