Butterfly valves - Butterfly valves manufacturer - SIO

Butterfly Valves

SIO makes top-quality butterfly valves using different materials and configurations. Butterfly valves are a 90 degree-turn rotational valve that is useful in stopping, regulating, and starting flow. They’re easy and quick to open as the quarter rotation allows the entire closing and opening of the valves.

They are a popular choice because of their thin feature between the flanges, which makes them lightweight and affordable. Most large butterfly valves will come with a “gearbox,” which makes the application of the valve easy to operate. However, this will affect the speed of the operation.

AT SIO, you can be confident that we will see to it that you only get the best butterfly valves for your projects.

    Butterfly Valve Manufacturer

    Butterfly valves function as regulatory or shut-off valves. They are operated in a quarter-turn rotational motion to regulate, start, and stop the fluid flow. They limit the flow by being partially open, or they can entirely shut off the flow. Butterfly valves are best suitable for shutting off and throttling processes.

    As a butterfly valve supplier, butterfly valves are maunfactured to control the flow rate of a fluid. The type of fluid varies on what materials butterfly valves are made of. They can be chemically neutral fluids, pharmaceutical fluids, or even corrosive fluids. These valves are the best choice in cooling water, gases, air, and fire protection systems, and vacuum and steam services.

    Butterfly valves have a good sealing system which is suitable for heating circuits. Some butterfly valves are equipped with flanges, they are essential in pressure drop.

    SIO High performance butterfly valve

    Metal Seated Ball Valves Features

    Temperature range

    The SIO valves have a wide temperature range. They can resist temperatures from -4 degrees Fahrenheit to 260 degrees Fahrenheit.

    Body Material

    The SIO valves can be made with different body materials, including stainless steel, carbon steel, nickel alloy steel, nickel aluminum bronze, titanium and titanium alloys, cast iron, and ductile iron.


    When it comes to the diameter of SIO valves, it varies from one model to another model. Depending on the application, you can choose from valves with 2″ to 24″

    Fluid regulation

    The SIO valves can regulate the flow of slurry as well as compressed gas. The corrosion resistance is different for a  pfa lined butterfly valve and others.

    Benefits of using Butterfly Valves

    Manufactured by a reliable and experienced butterfly valve supplier, the quality and price of butterfly valve could be guaranteed for our customers. 


    If you compare butterfly valves to other types of valves for fluid flow regulation, they are comparatively easy to manufacture without being expensive.

    Easy Maintenance

    Along with being compact in design, butterfly valves are very easy to handle and manage. The maintenance costs with teflon lined butterfly valves are significantly reduced due to the reliable construction of a butterfly valve. The abrasion free nature of these metal seated butterfly valves helps any plant owner to save costs.

    Less Structural Support

    Butterfly valves are comparatively light and require less structural support than any other kind of valve vene if the diameter is the same. This makes it one of the most preferable valve types on the market.

    Standard and Specification of Butterfly Valves

    Pressure Range

    As for the pressure range of SIO valves, it ranges from 225 PSIG (2″ to 12″) to 160 PSIG (14″ to 24″).

    Wide Temperature Standard

    The SIO valves retain a broad temperature range. In general, they can withstand temperatures up to 2500 degrees Fahrenheit.

    End Connections

    The SIO valves feature different connection ends. In general, they range from 2″ to 24″.

    Low maintenance

    SIO’s high performance butterfly valves are applicable in different industries like wastewater treatment , fire protection, slurry services, water and gas supply, reducing costs of repairs and maintenance.

    Common Metal Seated Ball Valve Applications

    Steam service

    For steam service , the fluid needs to maintain its form without causing a leak and pertaining to a strict temperature regulation as per manufacturing and healthcare industry requirements. The disc in the butterfly valve helps regulate the flow and maintain a steady stream when required. They only promote unidirectional flow.

    Gas service

    When it comes to gas service, the butterfly valve throttling function comes in handy. In any system where the flow of gas needs to be controlled rapidly, butterfly valves are the first choice. They often find use in the oil and gas industry along with commercial scenarios because they can handle the flow of compressed gas.

    High temperature service

    While the temperature resistance of different types of valves depends on the types of materials being used, stainless steel butterfly valves can easily withstand high temperature manufacturing conditions. Across HVAC/R, Heating, and Mechanical industries, wafer and lug type valves can easily hold for up to 400°C.

    Vacuum service

    Given that some butterfly valves have to work in a vacuum, there are certain different regulations and conditions in manufacturing. If a butterfly valve is applied to vacuum service, it can easily withstand both low pressure and even vacuum conditions, as seen often in large-scale cleaning.

    High pressure service

    A high pressure butterfly valve is often in demand because most of the chemical, food and oil and gas industrial applications correspond to the need for maintenance of the process. A butterfly valve can stand the pressure going up to 300 psi from the vacuum.

    Butterfly Valve from China

    The primary consideration with butterfly valves is how they are manufactured. SIO’s factory and facilities are capable of manufacturing butterfly valves that can withstand high pressure and temperature conditions. 

    If you want a wholesale manufacturer from China for quality butterfly valves, our facilities ensure that the production is on time every time. The high precision equipment used in the manufacturing of butterfly valves helps in the making of cost effective products, even in bulk. 

    What Are the Components of a Butterfly Valve?


    The body of butterfly valves fits between two flanges, and the common designs are lug and wafer. The lug body provides bolts to match those in the pipe flange using protruding legs, while the wafer body is positioned between two flanges using nuts and studs or bolts. Unlike the lug body, the wafer body does not have protruding legs and are more economical in initial and installation costs.


    Most butterfly valves utilize an elastomeric seat and the disc seals against it. The seat provides shutoff using an interference fit connected to the disc edge. When the disc is sealed against a seat inside the valve body, the flow of fluid stops. The seat can either be locked in or pressed inside the body.

    These designs increase the pressure in the pipeline, adding more interference between the disc edge and seat. The seat has different temperature and compatibility variations depending on the material used for the construction.


    The stem of a butterfly valve varies in design. It can come in a split-design, a one-piece or two-piece shaft. The stem gives the strength required to unseat or seat the disc, so the position the stem should be accurate. Since it has a close contact with the media, the stem should be compatible with the fluid.


    The disc is designed to close the valve and stop the flow of liquid, playing a role similar to the ball in a ball valve, the plug in a plug valve, and the gate in a gate valve. Besides, the disc regulates the fluids like water and chemicals.

    The disc is aligned with the stem, which improves the flow of fluid, sealing and operating torque. The disc closes or opens the valve through a 90-degree rotation.

    What Are the Different Types of Butterfly Valves?

    Butterfly Valves by Valve Body Material

    Carbon Steel butterfly valves
    Stainless Steel butterfly valves

    Carbon Steel butterfly valves

    Carbon steel butterfly valves are characterized by their strength and durability. Because they are primarily used for low pressure systems they can work well in the chemical, food and Pharmaceutical industries.

    Stainless Steel butterfly valves

    Stainless steel butterfly valves are composed of iron, nickel and 10.5% chromium. The use of chromium in the manufacturing process adds an additional layer of oxide to prevent rusting and corrosion from exposure to toxic media.

    Nickel Alloy Steel

    A nickel alloy steel butterfly valve is made for all the industries where fluid will be highly corrosive. The facilities will offer challenges in terms of high pressure and temperature conditions.

    Titanium and Titanium Alloy Butterfly Valves

    Titanium boys and titanium alloy material is the most preferable when it comes to strength-to-weight ratio. The oxide layer in these valves prevents any rusting which can be seen in valves made of other base materials.

    Ductile Iron valve

    Nickel Aluminum Bronze

    The nickel aluminum bronze alloy features 5% nickel, 5% iron, and 10% aluminum which helps improve the resistance and strength of the material. They prevent biofilm which is the primary cause of corrosion in valves.

    Ductile Iron ​

    The most notable benefit of ductile iron butterfly valves is that they are extremely well equipped to handle harsh conditions and have a high tensile strength. They are resistant to high pressure and corrosive media which makes them well equipped for different industries.

    Cast Iron

    A cast iron butterfly valve has added strength because it is actually in an alloy of silicon, iron and carbon. They are perfect for industrial systems with high pressure and temperature conditions. They also have impressive shock absorbance.

    Butterfly Valves by Design / Disc Alignment

    The design of the valve will vary based on the type of disk used as well as the number of stems. Both two piece and one piece shaft designs are used for industrial applications and account for different types of butterfly valves.

    Double Eccentric butterfly valves

    Concentric / Zero Offset

    In a concentric or zero offset butterfly valve, the center of rotation is focused and the middle of the desk and every process is streamlined at the center. They're more popularly used in soft seated valves with low pressure systems. 

    Double Eccentric / Double Offset

    Also known as high-performance butterfly valves, double eccentric or double offset walls are commonly used in high-pressure and temperature situations and systems across different industries. Double eccentric valves are used in power generation, oil and gas industries to prevent jamming.

    Triple Eccentric / Triple Offset

    Used mainly in power generation operations and pharmaceutical industries. , triple eccentric butterfly valves have uniform sealing a 90-degree rotation to prevent leakage and facilitate easy regulation of media.

    Butterfly Valves by Sealing Material

    Lined Butterfly Valves
    Metal Lined Butterfly Valve

    Rubber Lined Butterfly Valves

    Rubber Lined Butterfly valves are constructed to be utilized for separating or controlling flow with rubber as the primary sealing substance. The valves are light in weight and their discs relatively induce a pressure drop.

    Plastic Lined Butterfly Valves

    The rubber lined butterfly valves are also light in weight and free of maintenance, and act as heavy-duty solutions to applications that handle high pressure. For example, they are suitable for petrochemical processing, paper industry, and fuel handling systems.

    Metal Lined Butterfly Valves

    These valves retain a metal to metal sealing, which provides the power to resist elevated pressure and weather circumstances. Because of their wear resistance and durability, they are suitable to be used in fuel, petroleum, and food industries.

    Butterfly Valves by End Connection Type

    Different types of butterfly valves can be classified based on their end connections which help classify them as per their industrial applications. Butterfly valves have flanged ends, lug type ends, wafer type ends, and butt-welded type ends.

    Wafer Type End Butterfly Valve
    Flanged Type Butterfly Valve

    Wafer Type

    Wafer type butterfly valves are the best option for use across different industries. The tight sealing feature helps create a strong blocking point which does not allow any block backflow even in case on bi-directional media flow.

    Lug Type

    Lug type butterfly valves are characterized by using different sets of bolts to attach different flanges. In an industry where downstream piping service is to be removed when relying on using lug type valves.

    Flanged Type

    Iceland guide butterfly valve has a flange face on both the sides and is often used for heavy-duty applications. Irish temperature in pressure conditions will not impact the performance of this particular butterfly valve.

    Butt Welded Type

    This type of butterfly valve is known to prevent scratching in the internet parts and tolerate high pressure and temperature fluids. They are used mainly in the petrochemical and power generation industry.

    Butterfly Valves by Seat Type

    The walls may have a locked, pressed, or bonded seat. A metal seat butterfly valve will have different features than a soft seated one.

    Metal Seated Butterfly Valve
    Soft or Resilient Seated Butterfly Valve

    Metal Seated Butterfly Valve

    Between the body and the flavor of metal seated butterfly valves use a sealing surface made of metal. They have a wide range of applications across different industries as they can tolerate harsh conditions related to temperature and pressure.

    Soft or Resilient Seated Butterfly Valve

    For all industries with less critical applications and low pressure systems resilient seated butterfly valves come in handy. Used in the pharmaceutical industry and food production valves come with a quarter turn rotation.

    Butterfly Valves by Valve Operation

    The valve operation of butterfly valves makes it easy for the controller to manually or remotely access and control the media in a large facility. Different types of butterfly valves are operated differently, but mostly they operate like quarter-turn valves. 

    Manual Butterfly Valve

    Manual Butterfly Valve

    Manual butterfly valves are of two types: lever handle and gear butterfly valves but the basic process of usage remains the same. Manual operating valves are used in smaller spaces and with smaller systems to effectively regulate media flow.

    Automatic Butterfly Valve

    Automatic butterfly balls are characterized by a remote control of media flow. Almost all automatic involves manual levers as a failsafe method. Automatic butterfly balls out of 3 types: electric, pneumatic and hydraulic.

    Three Types of Actuated Buttefly Valve

    Pneumatic Actuated Butterfly Valve

    Pneumatic actuated butterfly valves convert an air signal into valve stem motion through the air pressure in a diaphragm or piston which is connected to the stem. Pneumatic butterfly valves are suitable for open-close positioning and throttling operations since they are considered fast-acting valves.

    Electric Actuated Butterfly Valve

    Electric actuated butterfly valves may have an automatic, semi-automatic, or manual operation. Electric actuators are one of the most common types of actuators in butterfly valves because they are maintenance-free and reliable. These actuators allow electric actuated butterfly valves to be operated remotely.

    Hydraulic Actuated Butterfly Valve

    Hydraulic actuated butterfly valves are designed to regulate the flow of hydraulic fluid in a hydraulic circuit. Hydraulic actuators are often used to open a valve which requires a large force. They are utilized to redirect pressurized fluid or completely close a line.

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