A-T Controls Industrial Valve, Actuator and Controls Product Overview
A-T Controls is a global leader in the design, manufacturing, and sale of manual & automated process valves for all types of industries. A-T Controls is known for its extensive inventory and highly experienced staff that enable them to provide the customer solutions needed to fulfill most valve and actuator requirements while offering both a competitive price and the fastest turnaround in the industry.
A-T Controls products provide high-performance operation in virtually every industry, including Oil & Gas, Refining, Petrochemical, Chemical Processing, Pulp & Paper, Mining, Transportation, Food and Beverage, Pharmaceuticals, Marine, HVAC, Power, and more.
A-T Controls Products Include:
High Performance Butterfly Valves; Resilient Seated Butterfly Valves; Trunnion Mounted Ball Valves; Pig Valve Dual Valve; Isolation Valve Assemblies; Cryogenic Ball Valves; Lined Ball Valves; Tank Bottom Valves; Electric Actuators; Spring Return Electric Actuators; Fail Safe Electric Actuators; Heavy Duty Actuators; Pneumatic Scotch Yoke Actuators; Pneumatic Rack & Pinion Actuators; 180ยบ Pneumatic Actuators; Stainless Steel Pneumatic Actuators; Declutchable Gear Operators; Gear Operators; Limit Switches; Solenoids; Positioners.
DOWNLOAD THE A-T CONTROLS PRODUCT GUIDE
For more information, contact Piping Specialties, Inc / PSI Controls. Call them at 800-223-1468 of visit their website at https://psi-team.com.
Cost-effective, Non-contact Ultrasonic Level Measurement from Drexelbrook
Affordable, 2-Wire Level Transmitter with the performance and features of premium, line-powered systems.
DOWNLOAD THE USONIC DATA SHEET HERE
USonics ultrasonic technology level products from the Drexelbrook family offers a cost-effective two-wire and line powered versions for the non-contact measurement of liquids and slurries for level, distance, volume, and open channel flow. Level, size, volume, and open-channel flow measurements are easily configured via a menu-driven display. The USonic level transmitter has a 4-20 mA two-wire HART output signal and is suitable for all Class I Div. 1, Zone, I.S., or explosion-proof locations.
For more information contact PSI Controls / Piping Specialties by calling 800-223-1468 or visit https://psi-team.com.
The Flow Safe F9000 "SurgeFlow" Liquid Surge Relief Valve
Liquid product pipelines must be protected from liquid surges. Surges are caused by pump failure, rapid block valve closing, non-return check valve hard-shutting, emergency shutdown of a tank or loading system, or even a pump coming on or tripping. The magnitude of surge pressures varies, some virtually undetectable to those severe enough to cause significant damage. These propagating waves, either increasing or decreasing rapidly, are commonly known as a transient hydraulic surge of water hammer that can cause severe damage to liquid product pipelines, vessels, flanges, valving, and associated equipment.
The Flow Safe SurgeFlow series has been developed exclusively for liquid surge protection. These valves are extremely simple and 100% reliable. The dome cavity volume on top of the main valve piston is filled with nitrogen gas to affect the valve's proper set pressure. Dome gas pressure is set according to the characteristic piston seat-to-seal area ratio for the given valve size. This dome load forces the main valve into a closed position using a soft elastomer seat, providing a 100% tight shut-off. When surge pressure is sensed, the SurgeFlow valve piston opens immediately as the liquid fluid force acting under the piston overcomes the force from the dome gas working on the top. The piston continues to lift in proportion to the pressure surge, slightly compressing the dome gas. The closing cycle responds directly to pressure decay in the piping upstream of the SurgeFlow surge relief valve.
SurgeFlow series valves are designed for accurate and repeatable performance. They will handle both minimum and maximum surge cases when called upon to relieve. Flow Safe suggests all surge relief valves be located nearest the point where maximum pressure can occur in the main pipeline for optimal safety purposes.
For more information about Flow Safe products in New England, contact Piping Specialties. Call them at 800-223-1468, or visit their website at https://psi-team.com.
Thermal Flowmeters for Wastewater Applications
Wastewater treatment plants ( WWTPs) or publicly owned treatment plants (POTWs) must operate 24/7 to satisfy domestic, industrial, and storm drain sources. Sewage treatment includes eliminating pollutants from wastewater and sewage (human waste, animal waste, soaps, and detergents) to create a safe fluid waste stream that can be reintroduced safely into the ecosystem and a solid waste appropriate for reuse (usually as fertilizer). The primary applications for flow meters in wastewater treatment settings measure blower air to each pool in the aeration basin and measure digester gas flow.
Digester sewage is called "sludge." When bacteria is added to the digester, the sludge breaks down and releases gas. This digester gas is collected, compressed, it's excess moisture gets removed, and is then cleaned in a scrubber. The cleaned gas is sent to engines or fuel cells for power generation, boiler water heating (for steam or hot water), and excess gas burns off at the flare. Many extensive sewage treatment facilities use digester biogas to operate the plant, minimizing their grid power consumption.
Developing accurate flow rate data allows wastewater treatment facilities to more precisely manage digester production levels, enabling tighter controls on methane levels and flaring. Kurz Instruments provides a handy overview of where thermal flowmeters are applied and provide optimal performance.
DOWNLOAD THE TECHNICAL PAPER HERE
For more information about applying flowmeters to wastewater applications in New England contact Piping Specialties. Call them at 800-223-1468 or visit their site at http://psi-team.com.
Thermal Flow Meters for Pulp & Paper Applications
Creating paper pulp relies on a careful balance of low-velocity air flows among the various processes. For example, the recovery boiler following the digester modulates to follow the digester load changes. Additionally, a recovery boiler uses the black liquor's chemical reaction to generate heat for the boiler. It has three airflow systems requiring tight control to create stable air flows.
Kurz Instruments provides a good application note explaining the areas where thermal flow meter uses appear in the pulp and paper production process. You can download the application note below.
DOWNLOAD THE THERMAL FLOW METERS FOR PULP & PAPER APPLICATION NOTE HERE
For more information on instrumentation for pulp and paper mills in New England, contact PSI Controls (Piping Specialties, Inc.). Call them at 800-223-1468 or visit their website at https://psi-team.com.
Ball Valves Used for Black Liquor in Pulping Kraft Process
Many toxic, corrosive, and reactive chemicals are used in pulp and paper mills in chemical pulping. This incredibly hostile environment requires well-engineered automatic valve systems and durable valve actuators, spring units, and positioners.
Suppose you understand how paper is made and what chemicals are usually used in the atmosphere. In that case, you can instantly understand why special consideration is required for valve and actuator selection.
In the early stage of paper production, digesters combine high heat and a heavy alkaline liquid called "white liquor" to convert wood chips into a pulp during separation from wood chips. White liquor (mainly sodium hydroxide and sodium sulfide), process water, heat, and pressure are used to separate wood chips into lignin and cellulose fibers. The white liquor breaks down the lignin (the substance that binds the wood fiber together) in wood chips. The resulting combination of water and spent white liquor produces "black liquor." This liquid pulp residue mixture made up of lignin and hemicellulose, and inorganic compounds such as sodium hydroxide and sodium sulfide is toxic. Another by-product of this process is Hydrogen Sulfide, a toxic, corrosive, and flammable gas.
Effects on Ball Valves
In piping and ball valves, managing these process chemicals and by-products is difficult. Pipe diameters range from 2"-10", but the most common sizes are 4", 6" and 8." Usually, these processes are ANSI / ASME Class 150 and ANSI / ASME Class 300, the most common end connection being 150 # and 300 #. Process temperatures are usually high, between 250 ° F and 350 ° F. The valve body and end connection materials are generally 316 stainless steel, but you'll also find carbon steel requested. Applications can include manual lever, gear operators, pneumatic actuators, and electrical actuators in valve assemblies.
The most concerning issue is the sticky molasses-like liquor builds upon the ball valve face and contaminates the back seat spaces, inducing strong internal clearance forces, resulting in valve lock-up over long static periods. A superior ball valve seat design from A-T Controls addresses the viscous material problem.
A-T Controls developed a solution for this extreme pulp and paper service and black liquor service with notable improvements to their FMS series. This valve incorporates a "scraper seat" feature that eliminates the molasses-like residue baked on the ball's face and eliminates valve lock-up. The addition of Aflas ® o-rings seal the seat cavity from media build-up, and a Venturi hole in the ball is also provided.
Typical black liquor ball valve from A-T Controls:
- Series: A-T Controls FMS
- Sizes: ½" -8"
- Rating: ANSI/ASME Class 150/Class 300 with 150# and 300# flanges, API 607.
- Ball and Seats: Tungsten Carbide coated metal scraper seats (Aflas® o-rings and Venturi Ball for black liquor service.)
Please consult a Piping Specialties Applications Engineer for material selection for your black liquor application. This information is a guideline, and customers are solely responsible for construction materials, preparation of the valves for service, and lubricants being compatible with their black liquor application.
For a free consultation, call Piping Specialties at 800-223-1468 or visit their website at https://psi-team.com.
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