Thursday, December 8, 2016

General Purpose Valve for Targeted Applications

industrial butterfly valve with actuator handwheel
Industrial Butterfly Valve
Courtesy Adams Valves, Inc.
This is the Adams Valve WEK series industrial butterfly valve. It is a general purpose valve for many applications involving fresh water, seawater, sewage, hydrocarbon and wet gas.

The WEK valves feature low operating torque, compact design, low weight, and good control characteristics. The sealing system is completely integrated within the body of the valve, utilizing a laminated metal and graphite material. Available sizes range from 3" to 24".

Streamlining promotes smooth movement of the disc through its full travel range, without flutter induced by the flow moving around the disc. Sealing is accomplished when the disc rotates to the closed position and seals tightly against the seat which is incorporated into the body. Tight shut off results from the disc pushing into the seal. Valve operation can be manual, via a handwheel, or automated with a range of electric, hydraulic, or pneumatic actuators.

Share your fluid control, valve, and automation challenges with the engineers at CTI Controltech, combining your process and facility knowledge with their product and application expertise to develop the most effective solutions.

Friday, December 2, 2016

Electro-hydraulic Valve Actuators Applied at Tank Farm

electro-hydraulic valve actuator rotork skilmatic
Electro-hydraulic valve actuators
Rotork Skilmatic
Rotork is a global leader in the design and manufacture of valve and damper actuators for industrial applications. The company's Skilmatic line of electro-hydraulic actuators is designed to provide a solution for modulating control and electric failsafe operation in rotary and linear designs. The company has created an animated video illustrating how the actuators can be deployed on control valves in a tank storage application. The presentation provides good detail of the inner workings of the actuator, along with the actuator control unit display. The video is short, but very informative.

Share your valve and automation requirements and challenges with application experts. A combination of your process and facility knowledge and their product application expertise will produce effective solutions.

Thursday, November 17, 2016

Manufacturer Applies Combustion and Boiler Technology to High Temperature Fluid Generator

High temperature fluid generator skid mounted outdoor location
Genesis Series - High Temperature Fluid Generator
Courtesy Victory Energy
Victory Energy, an innovator in high efficiency boiler design, recently announced their new Genesis High Temperature Fluid Generator line. Victory states that the Genesis
"...heats any suitable thermal oil, glycol-water mixture or even water, with output capabilities ranging from 5 MMbtu/hr. to 200 MMbtu/hr. A complete membraned wall furnace provides gas tight construction that offers greater structural integrity while also minimizing refractory."
The company has incorporated its extensive combustion and boiler technology into the new Genesis product, which is intended for diverse applications in the petroleum, institutional, utility/power, pulp and paper, and chemical processing industries. Essentially, the unit is designed to deliver any high temperature thermal medium at the specified pressure to accommodate and enhance process operations.

Each unit is configured and engineered for the specific intended application to assure that maximum efficiency is attained. Victory's unique design provides
"...the ability to easily accommodate high differential temperatures while eliminating hot spots in the generator by controlling fluid flow evenly through the tubes."
Reach out to a combustion and boiler expert for more information on the Genesis line of high temperature fluid generators from Victory Energy.

Tuesday, November 8, 2016

Valtek Mark One Valve Build - Piece by Piece

Here is a video produced by Flowserve that gives an inside look at the Valtek Mark One globe control valve. The Mark One is suitable for gaseous and liquid service, and the animation illustrates the ease with which the valve can be disassembled in place for easy maintenance.

Contact a product specialist for more information and share your fluid process control challenges with them. Combining your process knowledge with their product application expertise will yield an effective solution.

Tuesday, November 1, 2016

LED Illuminator for Flat Panel Water Gauges

Water Level Gage Illuminator
LED Water Level Gage Illuminator
Courtesy Clark Reliance
Illuminators improve the visibility of flat panel water gages used for boiler water level monitoring. They serve as a backlight source that accentuates the display of the water-vapor line in the gage.

The DuraStar, from Clark-Reliance, can be fitted to
their flat glass panel level gages. The heatless LED illuminator is available in configurations for ordinary or hazardous classified locations. It provides high contrast visibility in all ambient lighting conditions, can be retrofitted to most existing gages, and is maintenance free.

Share your boiler trim instrumentation and control requirements and challenges with application specialists. Combine your process and facility knowledge with their application expertise to develop effective solutions.

Wednesday, October 26, 2016

Digital Valve Positioner Delivers Extended Functionality

digital valve positioner HART
Digital Valve Positioner
A valve positioner works in concert with an actuator to regulate the movement of an industrial process control valve in a predictable manner. Evolving from mechanical based designs, current state of the art positioners no longer employ mechanical means, such as cams, to establish positioner output. The latest models are software based and provide additional information and functionality to the user.
  • Loop powered device
  • Accommodates 4-20 mA input, as well as HART protocol for two way remote communications
  • Suitable for use with single or double acting actuators, linear or rotary motion
  • Certificates of approval for use in wide range of hazardous industrial environments internationally
Either of the input signal paths, analog or digital, can be utilized as the command source. When analog is selected as the input source, the 4-20 mA signal is considered the command signal. Selecting the digital source causes the level of the 4-20 mA input to be ignored and the signal sent via HART serves as the input command signal.

The software based units deliver enhanced functionality for in-field setup and calibration, as well remote monitoring and setup via HART. Multiple operating modes are accessible to the user to properly characterize valve position to desired curves, one of which can be customized. An analog feedback signal of the stem position is provided as an output.

There is more to learn. The document below goes into more depth about the features, specifications and options, with a good illustration of the user interface and screen shots taken from the SoftTools software suite that works with the digital positioner. Reach out to a valve control specialist with your requirements and challenges. The combination of your process knowledge and their product application expertise will produce effective solutions.

Monday, October 17, 2016

Type K Vane Actuator Provides Long Term Solution for Tough Power Plant Application

Rotork K-TORK vane type valve actuators on bottom ash spray valve control.
bottom ash spray valve control.
Rotork K-TORK vane type valve actuator has solved a difficult flow control application found in many coal-fired power plants – high-pressure bottom ash spray valve control.

High-pressure spray water is used to sluice bottom ash and pyrites from the boiler hopper bottoms and to carry the ash out of the plant. The valves used are typically ANSI Class 300 double-offset high-performance butterfly designs ranging in size from 3” to 12”, automated with double-acting actuators. They cycle from four to ten times per day and discharge to atmospheric pressure, creating a very high pressure drop. The flow media is re-circulated ash water that is abrasive and flows at pressures between 400 and 500 psi.

In many power plants around the world, K-TORK actuators have provided over 10 years of maintenance-free service whilst preserving the life of the valves and valve seats in this arduous duty.

Among the challenges, it is imperative that the valves close fully and with zero leakage in a high pressure drop state. If the valve disc moves even slightly from the seat, the abrasive, high-pressure water will “wire-draw” or cut the butterfly valve seat. Traditionally, rack-and-pinion or scotch-yoke actuators have been used in this application, but “slop” or hysteresis in the rotary-to-linear conversion allows for the pressure in the pipe to move the disc from the seat, often causing premature failure of the valve after a period of only three to twelve months.

The problem becomes more acute when multiple valves are leaking, lowering the available back-pressure at the header, which makes it difficult or impossible to move the ash from the boiler.

When assembled to the valve with a ‘No-Play’ coupling, the K-TORK actuator has zero lost motion, “slop” or hysteresis. The one-piece vane and drive shaft cannot be back-driven and will hold the disc of the valve firmly in place.

Additional challenges include the location of the valves on a manifold at the bottom of the boiler where space is critical and plant air can be poor quality. K-TORK provides a high torque-to-size ratio and the double-opposed lip seal design is forgiving to dirty or contaminated air.

Also, the low-friction performance of K-TORK provides a speed-controlled, smooth valve operation, eliminating the risk of water hammer created by the high pressure drop.

Finally, longer run time between shutdowns demands increased reliability from the equipment in these critical applications. In particular, as the number of plant maintenance personnel has decreased, actuators that reduce maintenance (seal replacement) time and work orders have a direct payback to the owner, especially when valve life can be significantly increased through improved actuator performance.

Share your fluid control and valve actuation challenges with a specialist, combining your process knowledge and experience with their product application expertise to develop effective solutions.