Happy Holidays from Automatic Controls of Virginia

Happy Holidays from Automatic Controls of Virginia

Electric Valve Actuators in Municipal Water Facilities and Industrial Process Plants

Electric Valve Actuators in Municipal Water Facilities and Industrial Process Plants

Electric valve actuators are devices that are used to open and close valves in water treatment plants and industrial process plants. These actuators are typically powered by electricity and can be controlled manually or automatically using electrical signals.

In municipal water treatment plants, valve actuators are used to control the flow of water through various stages of treatment. For example, they may be used to open and close valves that control the flow of raw water into the treatment plant, the flow of treated water out of the plant, and the flow of water between different stages of treatment.

In industrial process plants, valve actuators are used to control the flow of fluids and gases in a variety of process applications. For example, they may be used to control the flow of steam in a power plant, the flow of oil in a refinery, or the flow of chemicals in a chemical processing plant.

There are several types of electric valve actuators, including linear actuators and rotary actuators. Linear actuators operate by moving a rod or a piston in a linear direction to open or close a valve. Rotary actuators operate by rotating a shaft or a cam to open or close a valve.

The importance of electric valve actuators in municipal water facilities and industrial process plants lies in their ability to control the flow of fluids and gases accurately and efficiently. By using electric valve actuators, these facilities are able to automate their processes, reduce the risk of human error, and maintain a high level of control over the flow of fluids and gases. This is important for the safe and efficient operation of these facilities, as well as for the quality of the products and services they provide.

For more information, contact:
Automatic Controls of Virginia
(804) 752-1000

Automatic Turbine Water Induction Prevention from Questtec Solutions

Automatic Turbine Water Induction Prevention

All normally operating steam turbines carry the inherent risk of water ingress. Small amounts of condensate can enter from any connection to the turbine, sometimes arising rapidly from the condensation of steam. This almost always results in catastrophic damage to the turbine, even in low pressure situations. Human operators are rarely able to recognize and prevent these problems as quickly as they occur. 

The cost of turbine water induction problem is not just about the money spent on repairs or replacements. It also includes the time and effort that goes into correcting the issue.  The cost of turbine water induction problem can be defined as the total cost of repairing or replacing a turbine. This includes the costs for labor, materials and equipment, and other expenses. 

Therefore, automatic turbine water induction prevention (TWIP) systems must be used to safeguard turbines from this danger. They save significant costs through quick detection and prevention of water ingress into the steam turbine.

Automatic turbine water induction prevention systems are a critical component of the operation of power plants. These devices are used to detect and prevent condenser tubes from being flooded with water in the event of a turbine trip. The TWIP system can detect if there is water in the condenser tubes before it enters the turbine. This will allow operators to take corrective action before it causes damage to the equipment.


Questtec offers a range of products to safeguard your system with TWIP. Safe  plant operation begins with a 12 Probe Level-Trac LT-220 system installed on the boiler drum with high alarms and high trips set and continues with the LT-310 on Heater Drains, Superheat and Reheat Main Drains, and on Drip Pots downstream of Attemperators. This will monitor all potential areas for turbine water induction and automatically detect it. Our products fulfill ASME recommendations for safe steam turbine operation made in the TDP-1-2006 Standard. 

The LT-310 Series’ works on the same principles as the high integrity LT- 210 Series Resistivity and is selected where 1–6 probe channels are required. A single probe can be utilized to provide a control signal or several can be paired and validated against each other where greater reliability is demanded. It offers a sensitivity that is reliably able to detect condensate down to 0.5 mS/cm2 instantly.The circuits are in a continual state of test, with any faults reported through relay contacts and a visual indicator mounted on the front panel. The system can be set up such that no failed individual probe or component can cause a false signal, thereby always maintaining the critical functionality of the probes.

STANDARD FEATURES

Questtec includes a number of standard features in all TWIP products to ensure easy operation and maintenance. Standard features include: Alarms & Validated Tripping Relays, Normally Energized or Deenergized Relays, Time Delays, Sensitivities Settings, LED flash. All are easily set with solder pads in the field or by Questtec before delivery. Products also include an electronics integrity test button that tests the entire system’s operation.

For more information, contact:
Automatic Controls of Virginia
(804) 752-1000

Why You Should Choose Double Offset Butterfly Valves Over Single Offset


Isolation valves are a critical part of any piping system, but they're not given much thought until it's time to operate them.

They can remain open for weeks or even years, but they must provide a reliable seal when you close them.

Single offset butterfly valves seal with 360 degrees of contact between the resilient seat and the seating surface. However, when open, the seat and mating surface remain in contact at two points. Over time this continuous contact can cause the seat to become compressed and distorted, resulting in two potential points of leakage when the valve is closed, wasting water and compromising your piping system.

Thankfully, Val-Matic has the double offset butterfly valve, a version of our time-tested American butterfly valve that provides reliable isolation service without needing maintenance.

Here's how it works.

In addition to the offset from the body, the center line of the valve shaft has a slight second offset from the pipe center line. This allows the resilient rubber seat to completely lift off the metal mating surface when the valve is fully opened, eliminating rubber seat compression and two potential leakage points.

Add a precision nickel welded seat, and you have the peace of mind of a valve that seals reliably every time.

Contact Automatic Controls of Virginia for more information about the Val-Matic double offset butterfly valve. Call 804-752-1000 or visit https://www.acva.com.

Your Valve Automation Experts

Valve Automation Experts

Automatic Controls of Virginia (ACVA) is a provider of valve automation that offers a complete range of services and has facilities that can automate practically any size quarter-turn or linear actuated valve. ACVA can meet even the most complex automated valve requirements, whether you need small ball valves with pneumatic actuators or massive valves, such as those used on municipal pipelines. 

ACVA has a significant competitive advantage over other valve companies in the design, fabrication, assembly, and installation of any valve actuation or automation project. This competitive advantage combines the industry's best pneumatic, electric, and hydraulic valve actuators with its on-premise machine shop and fabrication division. This advantage, along with Automatic Controls' fifty years of expertise, makes them the superior choice as your partner in valve automation.

The technicians at ACVA who work on valve automation are highly knowledgeable in pneumatic rack and pinion and scotch-yoke systems, electric quarter-turn and linear systems, and valve communications. ACVA can handle even the most challenging actuation need, including bus communications, limit switches, fail-safe devices, and solenoid valves.

Automatic Controls of Virginia
(804) 752-1000