butterfly safety valve factory

​​Since 1978 Everest Valve Company has been dedicated to providing quality engineered and fabricated products to meet the rapidly increasing demands of the industry today. We have a specially trained team of engineers and a manufacturing personnel well experienced in producing high quality, custom designed valves and strainers.  All of our materials are 100% made in the USA. Our engineering staff combines both chemical and mechanical engineering expertise in recommending, designing and manufacturing valves and strainers to meet the customers specific needs. The manufacturing facility is well equipped to accurately fabricate, machine and then carefully assemble each component for a precise fit. Each valve or strainer is inspected and tested to make sure it meets or exceeds rated pressure, temperature, leakage and first class workmanship requirements before leaving the facility.

Butterfly valves are a popular choice because these are easy to install, very inexpensive and are available in almost all sizes. These are usually used in regulation services and for on-off purposes.

Butterfly valves are important to processes and operations in many different industries. This is because of their range in size and their ability to control the flow of liquids, gases, and slurries. Not only can butterfly valves stop or start flow, but when partially opened, they can also limit or reduce flow as desired.

Customers from many industries purchase butterfly valves, including those in food processing (liquid), waterworks, irrigation, pipe fabrication, industrial manufacturing, heating systems, and chemical transport.

While there are many different possible applications for butterfly valves, some specific uses include vacuuming, petroleum recovering, compressed air services, air and water cooling, HVAC, slurry services, high pressure water services, high temperature water services, steam services, and fire protection.

Butterfly valves have vast usages because of the variety of designs and materials available. From plain water to abrasive liquids or slurries, these can be fitted in any of the pipelines. These are usually employed inSlurries or sludges applications

One of the first people to use the butterfly valve was Scottish engineer and chemist James Watt. Watt used them as an important hardware element in his steam engine designs in the late 1700s. People did not really begin using butterfly valves in earnest, though, until the 1870s, when engineers used them as a part of a device with which they controlled air and steam flow to fans and turbines.

As time went on, manufacturers were able to make butterfly valves that were smaller, lighter, more powerful, and more heat resistant. One of the most important changes for butterfly valves came after World War II, when engineers started manufacturing them with seal accessories. These seals were made from synthetic rubbers. With them, butterfly valves became suitable for a much wider range of applications.

Then, in 1969, an American named James E. Hemphill received a patent for an updated butterfly valve design. His design allowed operators to reduce the amount of hydrodynamic torque they used to shift the valve output.

Then, in 1969, an American named James E. Hemphill received a patent for an updated butterfly valve design. His design allowed operators to reduce the amount of hydrodynamic torque they used to shift the valve output.

Butterfly valves offer many advantages to their users. First, they feature a compact design. Because of this compact design, they require less space to work than many other valves. Second, butterfly valves are fairly low maintenance. Next, they provide high quality flow blocking. Likewise, they do not leak, yet they are easy to open when you need to. Another advantage of butterfly valves is the fact that they are inexpensive.

Butterfly valves need less material, are easier to design and manufacture, and are often the more cost-effective option when compared to other valve types.

It is true that the disadvantages of butterfly valves outweigh its pros. But still there are a few things to keep in mind before using these valves.Even when completely opened, a small area of the disc is always in the way of the flowing material. This could both affect the movement of placement of the disc and the pressure switch in the pipeline.

Manufacturers generally use plastic, stainless steel, or cast iron when creating butterfly valves. They occasionally also use aluminum. Different materials and standards of performance are expected for different applications.

Of the three main materials used to create butterfly valves, plastic is the least common. While it is cost-effective, it can’t withstand harsh chemicals or high pressures.

Stainless steel is more durable than other metals (including untreated steel) and it can easily be cleaned in applications where sanitation is a concern. For the most heavy duty uses, cast iron is the material of choice. It’s strong and able to hold back high pressure for as long as necessary when the valve is shut.

Butterfly valves have a few main features. These include the body, the disk, the stem, and the seat. They also feature an actuator, such as a lever. Operators can turn the valve actuator in order to change the disc position.

The disc works like a gate in the gate valve, the plug in the plug valve, the ball in the ball valve, etc. When it rotates 90° to be parallel to the fluid flow, the disc is in an open position. In this position, the disc will permit all fluids to pass. When it rotates again, the disc enters a closed position and blocks fluid flow. Based on disc orientation and design, manufacturers can manipulate operating torque, sealing, and/or flow.

The seat is connected to the body via pressing, bonding, or a locking mechanism. Manufacturers usually make the seat from a polymer or elastomer. The goal of the seat is to provide the valve with shut-off. That is why the value of turning force that a butterfly valve requires to close is called "seating torque," and the turning force that a butterfly valve requires to rotate its closure element is called "unseating torque."

The actuators can either be mechanical or automatic to regulate the flow through the pipeline by dislocating the disc. While closed, the disc covers the valve perforation and the fluid is always touching it. It creates a drop in pressure. To switch the disc’s position so that it gives way to the fluid to flow, one needs to turn the rod by a quarter turn.

There are several types and series of butterfly valves, each with a unique purpose. These include high performance butterfly valves, pneumatic butterfly valves, butterfly valves with multiple shut-off points, triple offset butterfly valves, flanged butterfly valves, wafer style butterfly valves, lug butterfly valves, traditional butterfly valves, electric butterfly valves, AWWA certified butterfly valves, plastic butterfly valves, stainless steel butterfly valves, and aluminum butterfly valves.

Triple offset butterfly valves provide a tighter seal because they are mounted in three positions. At each position, they seal the pipe so that it will not leak.

AWWA certified butterfly valves meet all of the safety and efficiency standards of the American Water Works Association. They are made from cast iron or ductile iron, with a rubber or stainless-steel seat. Most often, people use this valve type to move potable water, which is why they must meet standards for human consumption.

Plastic valves are simply discs composed of thermoplastic materials molded into one piece. Plastic valves offer the advantages of high flexibility and low cost. They are not, however, as thermally stable or pressure resistant as metal valves.

Stainless steel butterfly valves are used in applications where resistance to corrosion and oxidation is important for consistent performance. Stainless steel is not only corrosion resistant and oxidation resistant, but also easy to clean and sanitize. Unlike many butterfly valve types, stainless steel butterfly valves can be used in food and medical applications.

Aluminum butterfly valves are a less common type of butterfly valve. Customers value aluminum butterfly valves because they are strong and exceptionally lightweight. They have a big disadvantage, though, which is that they are not corrosion resistant.

High performance butterfly valves are used to control the flow in systems with extremely high pressure or high stakes. Examples of such systems include those that carry chemicals, slurries, and hazardous gases. Usually, high performance butterfly valves manifest as double offset valves.

Wafer end butterfly valves usually have four holes. These holes are supposed to line up with the connected pipe. This type of valve is usually placed between two flanges in the pipe to clamp. These are installed effortlessly but are not ideal to use at the pipeline ends.

Wafer style butterfly valves are installed in between two flanges with nuts and bolts. They are held in place by the pressure put on them by the nuts on the backside of the flanges. Wafer butterfly valves are one of the most common types of butterfly valve products.

The lug body has projecting lugs around the perimeter that allow a passage to bolt holes, same as through flanges. End-of-line service is possible with lug-style butterfly valves, although a blind flange is always suggested.

Lug butterfly valves are butterfly valves that feature threaded metal inserts located inside bolt holes. With these inserts, users can install bolts without nuts. The main application of lug style butterfly valves is connecting and disconnecting piping systems from one side without distributing the other side of the system.

The body of this type of valve consists of flanges that are compatible with the pipe flanges. These are easier to install or remove because they are simply bolted with the pipe flanges.

Flanged valves are a version of the butterfly valve that uses a different method of pipe connection. Flanged butterfly valves have raised, or winged, edges in the enclosure so that they can be bolted in between two pipes.

The angled ends of the pipe and the straight end of the valve are welded together to form a butt-weld connection. These are appropriate to use in high pressure environments as direct welding secures the connection.

Manually actuated butterfly valves involve human input to operate. That is why they are very cheap. Manually actuated butterfly valves are further divided into two types depending on the manual actuator used:

These types of butterfly valves are actuated automatically and can be managed from afar. Since these do not require human interaction for normal working these can manage the efficient working of larger valves in less time. These usually come with a fail-safe option and can be managed manually in such cases. Three types of automatic actuators include

In this type of disc design, the stem goes through the center of the disc. Some sections of the disc are always in contact with or scraping the seat when it opens or closes. As a result of this configuration, the seat will be subjected to friction each time the valve is used. Concentric butterfly valves are the most basic type design and are used for low pressure environments.

In eccentric valves, the shaft of the valve passes behind the disc instead of going through its centerline. Which means the shaft is located opposite to the flow. This configuration of shaft to disc is the basis of three different types of eccentric butterfly valves.Single offset valves are the ones in which the shaft is offset from just the body centerline. This helps reduce the wear and tear of the seal as it minimizes the contact of the disc with the seal prior to closure.

Double offset valves have the shaft offset not only from the body center line but also from pipe centerline. This additional offset ensures that the disc will only rub against the seal slightly i.e. to about one to three degrees.

Triple offset butterfly valves have another offset when compared to double offset valves. It is a conical offset right where the disc is connected to the seal. A butterfly valve with three offsets is more efficient and wear-resistant. Metal seats are commonly used in triple offset valves to generate a bubble-tight shut-off.

Before installation, make sure to always test and carefully inspect your valves to ensure that no weak points are present. Then, proceed with installation per the instructions of your valve and flange manufacturer.

Because butterfly valves are popular in such a wide range of industries, a large number of regulatory organizations put out any number of standard series related to them.

American organizations that put out butterfly valve quality and safety standards include ASTM International, American Petroleum Institute, American National Standards Institute (ANSI), Manufacturers Standardization Society, and American Society of Mechanical Engineers.

International organizations that put out butterfly valve quality and safety standards include EEMUA (United Kingdom), BSI (United Kingdom), DIN (Germany), ISO (International Organization for Standardization), CSA (Canada), European Committee for Standardization, and JSA (Japan).

If you are interested in purchasing butterfly valves for your application, we recommend you connect with a high-quality butterfly valve manufacturer. To help you find the right one, we have put together a list of some of the best butterfly valve suppliers in the business. You’ll find the profiles and contact info of these companies by scrolling towards the middle of this page.

Before you start looking at our list of butterfly valve manufacturers, though, we suggest you take some time to write down your specifications. This will help you focus your search and focus your later conversations with potential suppliers. Make sure your specifications list includes information like your delivery deadline, your budget, your standard requirements, and your customer support preferences. Once you have written all of those down, take a look at our list of suppliers. Based on your specifications, pick three or four in which you are most interested. Then, reach out to each of those manufacturers to discuss your application. After you have spoken with each of them, compare and contrast your conversations and the services that each company offers. Finally, decide which manufacturer is right for you.

When designing a butterfly valve, it is critical that manufacturers consider the properties of the liquid or gas that the valve will be expected to control after being installed.

Based on application specifications, manufacturers can create butterfly valves that come in a diverse series of standard sizes and custom sizes, and a wide range of hardware choices. For example, in some cases, manufacturers might design the shaft as two pins rather than one solid rod. To learn more about your custom options, talk to a butterfly valve supplier.

BVC offers a wide range of products, superior support, and service to distributors, resellers, and OEM’S. Our high-performance butterfly valves are designed to perform with excellence in several applications and industries.

As a US distribution leader and longstanding supplier of the highest quality butterfly valves, we offer many solutions to choose from. Our top products are highlighted below.

This low maintenance industrial valve is mainly used for shipbuilding, but also for HVAC, petrochemical, fire control, seawater, flue gas, and desulphurization. The Resilient Seated Butterfly Valve seat comes in various forms: EPDM, White EPDM, Buna N, Viton, Viton for Steam, Silicone, and Neoprene. Sizes range from 1.5” -72.0”. Depending on the model, the RSBV can withstand temperatures from -4°F-400°F and a pressure range of 87 psig-250 psig.

Teflon Seated Butterfly Valve design is accurately machined to offer a long service life and low operating torque. It features a cartridge type seat (PTFO over rubber) thus suitable for high cycles. The Teflon Butterfly Seated Valve comes in two versions with a size range of 1.5” -24.0”. Respectively, each can handle pressures of 150 psig or 230 psig, and temperatures of -4°F-400°F. Its applications are OEM, HVAC, fire control, seawater, food service, petrochemical, flue gas, chemical, and many more.

The AWWA (American Water Works Association) Valve is a high-performance class water control valve used extensively in industrial and power plant operations. It improves upon other AWWA valves as it’s easily replaced. The seating is a one-piece steel ring encapsulated in rubber. The sizes range is 14”–104”.  It’s built for temperatures between -20℃–120℃ and qualifies for AWWA Pressure Classes 25B, 75B & 150B.

A Pneumatic Valve Actuator performs in harsh environments with its many attributes: waterproof, weatherproof, extreme temperature tolerance, and corrosion resistance. Pneumatic Valve Actuators are well suited for general oil and gas operations such as offshore drilling and oil rigs but they also work for food and drug production. The sizing range 214 in/lbs-81,000 in/lbs. They withstand pressure between 40-150 psig and a wide temperature tolerance range of -30℉~300℉.

High-Performance Butterfly Valves are designed for continuous exposure to extreme conditions. Our Double Offset Butterfly Valve is specially-designed with a reinforced shaft strength and blowout protection. It features a bi-directional shut-off and a seat made of Stellite or reinforced Teflon for resilience to pressure and high temperatures. Such applications for this valve are oil and gas (chemical, petrochemical, and offshore), pulp and paper, HVAC, shipbuilding, power generation, and more. Sizes range from 2”-48”. It has a broad heat tolerance range of -21℉-932℉ and an ANSI pressure rating of either 150 or 300.

The Triple Offset Butterfly Valve is also a bi-directional high-Performance Butterfly Valve. It features a laminated multilayer seat made with Stellite and graphite. The most notable attributes are seat-in-the-body, fire-safe rating, and bubble-tightness. These are manufactured for the most extreme application environments and are found in high-pressure steam operations as well as oil, gas, and chemical operations. The heat tolerance is extensive ranging from -320℉-1022℉. ANSI pressure ratings are 150, 300, 600, or 900.

Butterfly Valves are used for controlling the flow process in a variety of applications. What type of valve is most appropriate depends on the conditions of the application.

Butterfly Valves are a general-purpose shut off valve. They are lighter in weight than other kinds of valves with a tighter seal than a globe valve. This is needed for such applications as water theme parks, food processing, wastewater, or water treatment.

Butterfly Valves are often used in ships and shipbuilding because of their ability to withstand saltwater, fit in tight spaces, and operate underwater pneumatically. They are involved with mechanics such as “jacking up” rigs. Some ship operations require a Triple Offset Butterfly Valve qualifies as a Fire Safe approved valve which is needed for some ship applications.

Refineries have a complex operational structure. Butterfly Valves integrate well into these various operations. HPBFV and TOV Butterfly Valves have the requisite temperature and pressure tolerances at a fraction of the cost of a ball and gate valve. Examples of refinery applications are offshore rigs, chemical processing, etc.

Butterfly Valves are designed for an accurate fit, so we offer custom assemblies. Customized assemblies are offered in sizes up 48″ in pneumatic, electric (single or 3-phase), and electro-hydraulic variations. Off-the-shelf assemblies are ready in one day. Contact us today about your custom Butterfly Valve assembly needs.

The Kennedy Valve Butterfly Valves’ robust and rugged design can be relied upon for years of trouble free service. Kennedy Valves’ Butterfly Valves have a 100% bubble tight seal via a 316 stainless steel ring located in the body and the rubber seat located on the vane. This superior design provides ease of adjustment along with ensured dependability expected in any distribution system or plant installation.Available in class 150 and 250

"We are committed to consistently exceeding customer expectations by providing products, services, and information of the highest quality in terms of safety, reliability, accuracy, and timeliness. Our success is based on continuously improving the effectiveness of our products, processes, and Quality Management System."

With Farris, a trustworthy valve is only part of our promise. Farris provides customers with total pressure relief management solutions that support a facility’s entire lifecycle, transforming the way you ensure plant safety:

Our proven control valve packages are engineered for precise control and rigorously tested to deliver consistent results in any process conditions. Bray Control Valve solutions are trusted worldwide to enhance productivity, increase profitability, and reduce total cost of ownership.

Butterfly Valves are available in Manual, Air Actuated, or Air Actuated with two Micro switches and a Solenoid Valve. Clamp or Weld ends are standard. Other connections are available upon request. Available seat materials include Silicone, Viton®, and EPDM. Size range from 1˝ through 6˝. All products contact surfaces are available in either T304 or T316 stainless steel.

Butterfly Valves are available in Manual, Air Actuated, or Air Actuated with proximity switches and 24V Solenoid Valve. Clamp or Weld ends are standard. Other connections are available upon request.

Check Valves are widely used for both sanitary and industrial applications to prevent backflow of product. Ball Check Valves are designed to allow full product flow during processing. Once the product flow stops the ball rolls back to the seat at inlet preventing back flow. Ball Check Valves are commonly used with liquid products and installed horizontally. Sizes range 1 1/2¨ - 3¨.

Check Valves are widely used for both sanitary and industrial applications to prevent backflow of product. Spring Check Valves are designed to prevent fluid from flowing back and to create a positive shutoff. They are commonly used with liquid products and installed in the vertical position.

Check Valves are widely used for both sanitary and industrial applications to prevent backflow of product. Air Blow Check Valves are designed to evacuate lines of product or CIP solutions. Air Blow Check Valves are made of T316L Stainless Steel

Ball Valves are used in a wide variety of high pressure applications. Two factors make them popular. First, a full unrestricted flow that allows no product restrictions through the valve. Second, the three piece design and the removal of a minimal number of bolts allows service to be performed without removing the complete valve from the line.

Ball Valves are used in a wide variety of high pressure applications. A full unrestricted flow allows no product restrictions through the valve. Thus, allowing easy diversion.

Ball Valves are used in a wide variety of high pressure applications. A full unrestricted flow allows no product restrictions through the valve. Thus, allowing easy diversion. Ball Valves are available in Manual, Pneumatically Actuated, and Electrically Actuated versions. We also offer a full line of control options. Limit switches, Solenoids, and Positioners can be included with your automated valve assembly.

PVE Valves are available in three operating modules: Air Actuated; Air Actuated with an electronic control head; and manually operated. PVE valves popular applications are the following: Shut-off Valve, Divert Valve, Tank Outlet and Pressure Relief Valve. Connections consist of Clamp, Weld, Bevel Seat, and E-Line. EGMO’s PVE Valves are made of AISI 316L Stainless steel which meet all 3A requirements and are offered in 1˝ through 4˝ sizes. Unique patent pending sealing system.

The EGMO Sampling Valves are uniquely designed for process quality control, which often demands a stringent sampling process for the finished product and throughout the various production stages. Sampling plays a critical role in product verification. Sampling directly from the process can be risky for the operator as well as for the environment (contamination, pollution). Wherever product safety is a top priority, use ESVs to ensure stringent product quality control at every processing stage while elimination risks in the sampling procedure. With ESV, bacteriological samples can be taken directly from the pipeline.

Distributor of hydraulic press safety, quick opening safety, rotary and safety valves. Amerigear®, Boston Gear®, Carlisle®, DeMag®, Desch® and IMI Norgren®, pneumatic, double action, quick release and flow control valves also provided. Repair and preventative maintenance services are offered. Value added services such as custom barcoding, CAD capabilities, OEM assembly, plant surveys and third party logistics are also available. Serves the metal processing, metal service center, paper mill and paper converting, canning, grinding, commercial laundry, marine, oil and gas and material handling industries. Vendor managed inventory (VMI) programs available. Kanban delivery.