Category Archive: DFT® Valves

Vacuum Breakers in the Textile Industry

textiles Textiles is a global industry comprised of a wide array of manufacturing and processing stages. Starting as natural and synthetic fibers and threads, materials like cotton and yarn go through spinning and dyeing processes before their export as finished cloth goods. The textiles industry continues to grow, using diverse materials with different colors, properties, and specialized applications.

To facilitate this production, manufacturers increasingly turn to specialized machinery that can meet the demands of consumer, military, and industrial standards. Regardless of the machine or textile itself, however, most of these machines require the same underlying equipment: boiler and compressor systems that use vacuum breakers, chemical lines, and condensate lines.

Applications of Vacuum Breakers in the Textile Industry

A vacuum breaker is a specialized valve that protects pressure vessels, as well as pressurized tanks and piping. The textile industry has uses for vacuum breaker check valves and control valves throughout numerous stages of production. Some of the most common applications of these components include:

  • Regulating heat from steam boilers. This heat has uses in fabric dyeing and drying processes.
  • Creating pressure relief points. Valves allow pressure release for air compressor systems that need to run continually without downtime.
  • Controlling the flow rate and volume of fluids. Accomplished along with the help of metering pumps, valves ensure a steady, sufficient flow of liquids such as chemicals and water. They also discharge substances from boilers, compressors, and pumps.

Vacuum Breaker Benefits in the Textile Industry

vacuum breaker valve Vacuum breakers provide effective protection against the collapse of pressure vessels by preventing back-up material from entering the systems. For example, vacuum breakers can prevent condensate from backing up into previous parts of a system when it goes down or there’s decreased inlet steam.

Vacuum breakers help create safer systems, with some of the tasks they can handle including:

  • Stopping pipe collapses if the transient pressure drops 
  • Breaking siphons
  • Stopping water hammer by allowing more air into the downstream portion of the piping after the check valve
  • Preventing the formation of dangerous vacuums

Why You Need Vacuum Breakers

Vacuum breakers can protect your pressurized system from impairment in the event of pressure loss or over pressurized systems. They prevent dry can, slasher collapse, and pressure vessel collapse. In steam heated drying cylinders, which often dry ink on printed fabric, internal steam can condense into water during system downtime, creating a vacuum in the cylinder. Guarding against this, vacuum breakers can help keep your textile systems running efficiently and on time.

Vacuum breakers provide a tight shutoff to stop steam from leakage when a system is in use and then allow steam to escape during cooling cycles. Without vacuum breakers, the pressure shifts between highly pressurized “on” periods and depressurizing “off” periods can jeopardize the integrity of your equipment and lead to costly damage and downtime.

Vacuum Breakers From DFT® Inc.

The right vacuum breakers have strong seals to prevent leakage but are responsive enough to allow for the release of steam as needed to keep your textile operations running smoothly across each stage of production. Whether your facility specializes in synthetic fabrics, organic and natural fabrics, or dyed and treated textiles, the right equipment makes all the difference in completing orders on schedule and creating consistent products.

At DFT®, we serve our customers with a wide range of check valves and control valves. Our durable stainless steel DFT® Vacuum Breakers (model BSSV) are available in 1-inch to 4-inch diameters with a lapped disc and seat for tight shutoff. Contact us today or download our flyer to learn more about our Vacuum Breakers. You can also request a quote if you are ready to start your order.

Download Vacuum Breaker Flyer

Reverse Osmosis and Purified Water

Clean water is important for industrial processes, but the water a facility receives may not be clean enough. Using a reverse osmosis (RO) purification system can provide the level of purity companies need for product specifications and quality standards. Reverse osmosis water purification is a common technique for removing impurities from water for use in processing everything from pharmaceuticals to food and beverages. Systems using reverse osmosis rely on durable check valves to dependably manage reverse flow and water hammer to purify contaminated water.

Why Check Valves for the Reverse Osmosis Industry?

reverse osmosis system at a plant Reverse osmosis processes use pressure and a semipermeable membrane to purify water. In the first stage, unpurified water, or feedwater, enters a system. The system applies pressure so that the feedwater flows from the intake point to downstream operations, passing through a membrane. At this stage, the membrane collects any impurities and allows only purified water through, which is also called permeate water. Valves manage that flow to ensure a steady stream of water that will not overwhelm the system. 

Different check valves provide different benefits, functionalities, and levels of control at various stages. For example, a check valve located after water exits the membrane housing stops backflow and ensures that permeate water continues out the outlet port. Check valves are also required components for reverse osmosis systems that have automatic shut-off valves and pressurized tanks. When a tank is full, it creates enough back-pressure that it could send water surging backward through the system, causing breakage or recontamination. A spring-assisted valve can stop purified water from exiting back through the membrane. Flow only begins again after the back-pressure is below the feed pressure.

While check valves can protect the reverse osmosis setup, they do experience harsh conditions. Corrosive seawater and chemical contaminants can degrade these valves. Over time, dissolved salts (ions), chloride, and other chemicals will break down the seal and housing, which can lead to contaminated water. However, facilities can reduce the risk of deterioration by choosing the right seals and housings for the expected contaminants and environmental conditions. Nickel-aluminum-bronze and duplex stainless steel valves, for example, can withstand constant exposure to seawater. These materials are commonly used in check valves for reverse osmosis/desalination plants throughout Saudi Arabia, Israel, and the coast of California.

Reverse Osmosis Applications and Industries

Water purity is especially essential for the production of consumable goods, and reverse osmosis systems used along with other water treatment systems meet this challenge. Two of the most common industries with applications for reverse osmosis valves are:

  • Food and beverage. Reverse osmosis can purify water to guarantee safety, consistency, quality, and controllable tastes and odors in the final products.
  • Pharmaceuticals. Pharmaceutical manufacturers cannot create safe products without pure water. Even trace amounts of bacteria, organic material, chemicals, or minerals can jeopardize a product. In fact, some of the strictest water purity mandates call for water that has 10,000 times lower impurity levels than safely rated drinking water.

No matter the industry or water source, DFT® Inc. manufactures and distributes check valves that can keep reverse osmosis equipment running smoothly. Four of our highly recommended RO valves are:

  • GLC® NAB (Nickel-Aluminum-Bronze) Silent Check Valves
  • GLC® (Duplex Stainless Steel) Silent Check Valves
  • Excalibur® NAB (Nickel-Aluminum-Bronze) Silent Check Valves
  • Excalibur® (Duplex Stainless Steel) Silent Check Valves

GLC NAB check valve Excalibur NAB check valve

These check valves have a spring-assisted and non-slam design with applications in pressurized systems for preventing water hammer and in systems with exposure to extremely harsh conditions. With their use in brine, brackish water, and more, check valves are rated to withstand corrosion and deter marine life. They also feature a nozzle style for easy operation and require little maintenance.

Choose Reverse Osmosis Check Valves From DFT®

Reverse osmosis systems can purify water to make it safe for drinking, industrial processes, and pharmaceutical and food production. In those systems, check valves allow for safe and efficient water processing. For over 75 years, DFT® has innovated to provide its customers with in-line check valves and severe service control valves to fit their specific needs. Contact us today to learn more about our capabilities, or request a quote to start your order.

LSV-100® (General Service Globe Style Control Valve)

lsvThe LSV-100® control valve is a cost-effective valve used to control the flow of liquid, gas, and steam in a variety of systems. Designed for use on flanged pipes and fixtures, the LSV-100® control valve is a globe-style valve that can be used for both on/off applications and flow modulation. The trims can be replaced through the bonnet right in the field for minimal downtime and optimal operational efficiency. 

Features of LSV-100®

The LSV-100® control valve is valued for its low cost and exceptional durability. Standard designs are composed of carbon steel or stainless steel, with internal components of stainless steel. Standard component features include:

  • Sizes from 3/4″ to 6″ in inside diameter
  • Carbon steel and stainless steel
  • ANSI 150 and 300
  • ANSI RF ends
  • Characterized trim, including linear, equal percentage, and quick opening
  • Pneumatic actuation
  • Top entry
  • Globe design

Application specifications are used to determine the proper trim options and valve configuration for optimal performance. Valve trim is interchangeable, offering full port, standard port, and reduced port options in the same valve body.

Benefits, Applications, and Industries

The versatility and cost-effective design of LSV-100® valves make them a favorite choice for a wide range of industries and applications. 


DFT’s LSV-100® control valve is a highly economical globe-style modulating control valve with trim that is easy to change in the field. LSV-100® valves are designed to provide optimal control of fluid flow in a variety of flanged applications. Available in a wide range of sizes and configurations, our LSV-100® valves can be engineered with materials and designs that meet the particular needs of your application.


The LSV-100® can be used for both flow modulation and on/off applications for flanged components in highly demanding liquid, gas, and steam applications. The durable design, interchangeable trim, and corrosion-resistant materials help to ensure reliable valve operation in even the most extreme conditions. 


LSV-100® valves are highly versatile, low-cost, and durable. This makes them the valve of choice for liquid, gas, and steam control applications in virtually every industry, including:

  • Power Plants
  • Refining
  • Gas Processing
  • Food and Beverage
  • Pharmaceutical Manufacturing
  • Chemical and Petrochemical
  • Pulp and Paper Processing
  • Commercial Heating and Cooling

Quality LSV-100® Control Valves by DFT

For more than 20 years, DFT has been a leading supplier of highly engineered Severe Service Control Valves for customers in nearly every industry. We have the knowledge and experience necessary to ensure that you have the perfect valve for your operation. To learn more about our LSV-100® valve and other valve solutions, contact us today or request a quote

DSV® Sanitary Check Valves in the Pharmaceutical Industry: Explore Our eBook

In sanitary manufacturing applications that employ the use of fluid systems, such as in the pharmaceutical industry, regulating fluid flow and pressure is essential to maintaining high product and production quality. Common issues—such as backflow, water hammer, and cleanliness – significantly affect the overall effectiveness and efficiency of the system. For these situations, DSV® sanitary check valves serve as an ideal solution.

Why Are DSV® Sanitary Check Valves Important?

Unlike other check valves available on the market, DSV® sanitary valves meet 3A sanitary standard and are designed for use in applications with high sanitation requirements. As such, they are ideal for the manufacturing operations of products intended for consumption or direct contact with consumers, where unsanitary conditions can result in illness or injury. 316L stainless steel offers the corrosion resistance needed to prevent the contamination of process fluids.

By eliminating crevices and cavities from the valve design and achieving smooth, polished finishes on internal and external surfaces, we minimize the risk of material and bacteria buildup in our valves. We test 100% of our check valves before shipping them out to customers.

Get Your Free Copy:

A Guide to DSV® Sanitary Check Valves in the Pharmaceutical Industry


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Additional Information on DSV® Valves


The valve consists of seven main components: body, seat, disc, spring, guide, clamp, and body gasket. Both the disc and seat are lapped to ensure tight shutoff capabilities.

For full valve construction, check out our eBook.


  • Horizontal Valves. The horizontal valve models are suitable for use in horizontal piping lines that require a self-draining valve.
  • Vertical Valves. The vertical valve models are designed for use in vertical piping lines or horizontal piping lines that do not require a self-draining valve.

Key Features

  • Meets 3A Standard 58-02
  • 32 Ra or 15 Ra finish
  • Clean-in-Place Design
  • And more…

Download Now: All key features found in our eBook!


  • Condensate lines
  • Evaporators
  • Vacuum breakers
  • Purified Water
  • And more…

Download Now: All applications listed in our eBook!

A DFT® DSV® Sanitary Check Valve Success

A major engineering firm contacted us on behalf of several pharmaceutical companies. The firm needed to find a check valve solution for their noncorrosive medical waste drain system. The check valve needed to operate at 20 psig or less with a flow of 3 GPM, have sanitary end connections, provide tight shutoff, have a low cracking pressure to open and be able to be steam cleaned in place.

The check valve had to withstand high temperatures, as the firm used 330°F steam to clean the entire medical waste process system 3 times a day. The valve also needed an extremely smooth finish to maintain sanitary conditions.

Responding to the challenge, a DFT® 2 inch DSV® vertical check valve was specified. Designed to prevent flow reversal, this non-slam, full-body valve came equipped with a 0.1-psi cracking pressure spring. We also designed it with tri-clamp connections for ease of disassembly. The product was so successful that… Get the full story in our eBook!

For additional information about our DSV® valves and how they suit the needs of the pharmaceutical industry, download our eBook today.

Upcoming Webinar: Severe Service Control Valves – Problems & Solutions

Maintaining the performance of your facility’s control valves will ensure continued successful operations for your organization. At DFT®, we know a thing or two about valves, and we’re excited to share our knowledge at our upcoming webinar about control valves on May 15, 2019 at 2:00 PM Eastern Standard Time.

During the webinar, we will discuss some of the common problems and solutions that develop in severe service valve equipment, and we’ll also explore a few issues that can lead to critical failure in your service control valves.

severe service control valve webinar

Talking Points and Topics

Some of the questions that we’ll answer in our webinar include:

  • What is severe service?
  • What are the different types of control valves?
  • What types of service do they control?
  • What is cavitation control?

We’ll also talk about our valves’ design features and how they handle the effects of cavitation and other wear and tear issues. We will provide an overview of the Bernoulli Principle, which states that decreases in pressure and potential energy lead to increases in the speed of a fluid—one of the basic principles by which valves operate today.

Finally, we’ll go in depth on how causes and effects of:

  • Flashing and cavitation
  • Providing required flow
  • Actuation selection
  • Achieving tight shutoff
  • Slurries and erosion
  • High-pressure applications
  • High-temperature applications

After we finish our presentation, there will be a chance to discuss the topics covered as well as answer any questions you may have.

Sign-up for the Webinar Today!

What You Need to Know About Severe Service Control Valves –Problems & Solutions

We at DFT® are excited to share our years of comprehensive experience in valve design, performance, and functionality relative to fluid control systems. Be sure to register in advance to be included in the latest information within valve technology.

If you would like to learn more about our products, services, and other resources, don’t hesitate to view our catalog or contact our sales representatives today.