Resilient Seated Butterfly Valve
Features
- Economy & high performance
- One-piece body construction and self-centering disc.
- Seat facing acts as flange gasket.
- 3 shaft bushings support actuation.
- Shaft sealing against external leakage
- Meets MSS SP-67 and API-609 specs.
- Complete line of accessories
- Option: silicone free lined EPDM
Materials:
Body: Epoxy Coated Ductile Iron
Disc: 316 Stainless Steel (standard) NI Plated D.I. or Bronze available
Seats – BUNA-N or EPDM
End Connections:
Wafer: 2″ to 12″
Lugged: 2″ to 24″
Temperature Range:
BUNA-N: -4 to 194°F
EPDM: -22 to 230°F
Pressure Range:
225 PSIG (2″ to 12″)
160 PSIG (14″ to 24″)
Pressure Testing:
Body Hydro: 343 PSIG
Seat Hydro:243 PSIG
Dead End Service: (lug type only)
150 PSIG (2″ to 12″)
100 PSIG (14″ to 24″)
Available Actuators:
Electric
Pneumatic (spring return)
Pneumatic (double acting)
Manual Handle Lever
Manual Geared Hand Wheel
What is Resilient Seated Butterfly valve?
SIO’s Resilient Seated Butterfly Valves are made for effective regulation and isolation of media. Resilient seated butterfly valve is a type of butterfly valve that has a rubber (or resilient) seat between the external diameter of the disc and the internal wall of the valve.
SIO will ensure that all resilient seat butterfly valves when customised according to industrial needs will be maintenance-free and cost-effective. SIO ensures silicon-free production for a reliable operational value. They are lightweight and often used for high-pressure conditions.
Resilient Seated Butterfly Valve Features
Often the design of a resilient seated butterfly valve comes with a one piece disc/stem design. This is highly advantageous in any environment for hygiene maintenance and promoting durability.
SIO’s stem materials ensure compatibility with the type of resilient seated butterfly valve you are buying: stainless steel or BUNA-N/EDM Molded over Stainless Steel.
With durable construction and long service life, SIO’s resilient seated butterfly valves can be used in Sanitary Service with Mildly Corrosive and Toxic Media.
SIO ensures that all of their resilient seated butterfly valves come with an Integral ISO 5211 Actuator Mounting Flange for easy actuation
Why use Resilient Seated Butterfly Valve
Cost-effective
With a resilient seated butterfly valve from SIO, you can get effective solutions that are highly cost efficient especially when compared to other types of valves. The wafer type butterfly valve is the most affordable option you will get in butterfly valves.
Less Maintenance
SIO’s butterfly valves are made with careful consideration into maintenance free function with a longer life. Butterfly valves have reduced operating costs and longer life without rearing maintenance.
Emission Free Stem Sealing Service
For added protection and complete isolation, and effective media entrapment, two types of seals (primary and secondary) are applied during production. Based on the type of seal, you can choose a teflon lined butterfly valve.
Standard and specification of Resilient Seated Butterfly Valve
Common Metal Seated Ball Valve Applications
Resilient Seated Butterfly valve Factory
With a butterfly valve, you want the manufacturing to be done with high-precision equipment. The valves have to be connected to an external system which makes it essential for the manufacturing to be precise to prevent any leakage.
Butterfly valves are compact in size and we clean them through ultrasonic cleaning facilities. . SIO specializes in manufacturing and debug inspection of resilient and high performance butterfly valve, we could supply bulks of the valve without any compromise of quality.
Different Types of Resilient Seated Butterfly Valves Options
Epoxy-Coated Ductile Iron Body
TThe valve body of our concentric butterfly valve is made from ductile iron that guarantees durability, reliability, and long service life. It features more mechanical strength than cast iron so there are minimum chances of breakage.
Integral ISO 5211 Actuator Mounting Flange
Electric and pneumatic valve actuators of our resilient seated butterfly valves are provided with ISO 5211 valve mounting flanges, which are directly mounted for actuation of butterfly valves in system operations.
Emission-free Stem Sealing Device
SIO’s concentric butterfly valve is made with a rubber O-ring that effectively prevents external leakage. The O-ring maintains a tight contact between the spherical design of the rubber seat and the top and bottom ends of the disc. With its positive sealing, all operations are guaranteed emission-free.
Seat Materials
As a leading industrial valve manufacturer in China, we provide seats of our resilient seated in two durable materials:
- BUNA-N: This material is used for resistance to a number of different media. One can find it applied in chemical and food industries.
- EPDM: Ethylene-propylene Diene Monomer or EPDM is resistant to wear and tear over continuous use in chemical and pharmaceuticals.
Manual Operators
- Manual Lever Handle: Used for easy on/off of media flow.The operator can easily handle the flow through quick turning of the handle.
- Manual Geared Hand Wheel: Helps in precise regulation without compromising isolation. This type of manual operator goes a step further than the handle by giving better control.
Automatic Actuators
- Electric Actuators: Cost-effective options for automation actuation. Electric actuators will require vontant electrical connection to function properly.
- Pneumatic Actuators (Spring Return and Double-acting): They are safe for use across multiple industries due to their non-flammable properties.
Resilient Seated Butterfly Valve by Bonnet / Body Connection
Wafer Type End Butterfly Valve
The wafer-type end connection helps with tight sealing to prevent internal and external leakage. They stop backflow, especially in relation to the bidirectional flow of the media. SIO’s wafer type butterfly valves are easy to install and maintain.
Lug Type End Butterfly Valve
SIO manufactures a lug type butterfly valve for ease of use during system maintenance. Lug type ends are efficient in maintenance and replacement of different parts of the pipeline.
What is Resilient Seated Butterfly Valve?
SIO offers resilient seated butterfly valves for effective flow regulation or isolation. Resilient seated butterfly valve is a type of butterfly valve that has a rubber (or resilient) seat between the external diameter of the disc and the internal wall of the valve. The seat is mechanically attached to the body and it has an interference fit with the disc in the closed position. A resilient butterfly valve is a lightweight, maintenance-free, cost-effective, and reliable solution to high-pressure applications.
SIO resilient seated butterfly valves are carefully made with high-quality materials to ensure excellent performance and enhanced strength. The valve body is made from epoxy-coated ductile iron and the seat with BUNA-N (nitrile rubber) or EPDM rubber. The standard material for the disc is stainless steel, but we have nickel-plated and bronze available in our factory.
Also known as concentric butterfly valves, our resilient seated butterfly valves are supplied with several features to ensure cost-effective and reliable operations. They are silicone-free and are equipped with shaft sealing to prevent external leakage, seat facing that functions as a flange gasket, and three-shaft bushings to effectively support actuation. We also guarantee the safety of our butterfly valves as they meet MSS SP-67 and API-609 specifications.
Resilient Seated Butterfly Valve Design Features and Options
Epoxy-Coated Ductile Iron Body
The valve body of our concentric butterfly valve is made from ductile iron that guarantees durability, reliability, and long service life. It features more mechanical strength than cast iron so there are minimum chances of breakage.
Integral ISO 5211 Actuator Mounting Flange
Electric and pneumatic valve actuators of our resilient seated butterfly valves are provided with ISO 5211 valve mounting flanges, which are directly mounted for actuation of butterfly valves in system operations.
Emission-free Stem Sealing Device
SIO’s concentric butterfly valve is made with a rubber O-ring that effectively prevents external leakage. The O-ring maintains a tight contact between the spherical design of the rubber seat and the top and bottom ends of the disc. With its positive sealing, all operations are guaranteed emission-free.
Valve Operators
Depending on the application, our concentric butterfly valve can be operated in two different ways:
Manual Operators
- Manual Lever Handle
A lever handle allows easy indication whether the concentric butterfly valve is open or closed. When the handle lever is aligned with the pipe, the valve is in an open position. Meanwhile, when the handle lever is perpendicular to the pipe, the valve is in a closed position. This mechanism ensures safety and proper control of the butterfly valve.
- Manual Geared Hand Wheel
A gear-operated butterfly valve allows easy turning of the valve that promotes precise regulation or isolation of process media. Controlling the valve is easily achieved by turning the gear or wheel. Because of its design, a gear-operated butterfly valve is ideal for stressful environments, such as high-pressure applications and services that deal with corrosive media.
Automatic Actuators
Automatic actuators provide a safe and secure working environment for operators as they allow butterfly valves to be controlled remotely. They are mounted directly on the valves through an ISO 5211 mounting pad. SIO offers two types of automatic actuators for concentric butterfly valves:
- Electric Actuators
Electric actuators are economic solutions when valve actuation is necessary. They are quiet, non-toxic, and operates slowly reducing the risks of water hammer.
• Pneumatic Actuators (Spring Return and Double-acting)
Pneumatic actuators are a sustainable way when butterfly valves need to be actuated. These actuators use compressed air to control process media, making them non-flammable and safe to use.
A spring-return pneumatic actuator only has air supplied to one side of the piston, and the energy used to move the mechanism is from the spring on the opposite side.
A double-acting pneumatic actuator has air supplied to both sides of the piston, with one side having more pressure which allows movement needed to actuate the butterfly valve.
Seat Materials
As a leading industrial valve manufacturer in China, we provide seats of our resilient seated in two durable materials:
BUNA-N
This material is a general-purpose polymer that has excellent resistance to water, oil, hydraulic fluid, and solvents. It performs well in food and beverage and chemical industries as it is non-reactive to fatty acids, chlorinated carbons, nitro hydrocarbons, and high-polar solvents (ketones and acetones).
EPDM
Ethylene-propylene Diene Monomer or EPDM is a type of terpolymer elastomer that has high resistance to abrasion and tear. It is well-suited for a variety of applications, including pharmaceutical and chemical industries due to its excellent chemical resistance to various alkalis and acids.
End Connections
Our resilient seated butterfly valve may be supplied with either of these end connections:
Wafer Type End
The wafer body is designed to maintain a tight seal for protection against bi-directional pressure to prevent risks of backflow. It is easy to install and is assembled between pipe flanges while the flange bolts enclose the valve body.
Lug Type End
The lug body is made with lugs extending out on the edges of the valve body to provide paths for bolt holes that match with the flanges. It is designed to prevent the entire shutdown of the system during maintenance and repair of the butterfly valve. It has a similar structure with a three-piece ball valve wherein one process line can be removed without affecting the opposite side.
How Does a Resilient Seated Butterfly Valve Work?
A resilient seated butterfly valve is a quarter-turn valve that rotates 90 degrees to open or close the media flow. It has a circular disc, also known as the butterfly, found at the center of the body that functions as the closing mechanism of the valve. The disc is connected to an actuator or handle through the shaft, which goes through from the disc to the top of the valve body.
Essentially, the movement of the disc will determine the position of the butterfly valve. If the disc does not rotate to a full quarter-turn, it means the valve is partially open and cannot provide unrestricted flow. If the disc rotates a full 90-degree turn, the valve is completely opened and there is full passage for larger media. Similar conditions apply when closing the butterfly valve. If it does not rotate a full 90 degrees, the valve is not completely shut allowing small amounts of gases or liquids to pass through.
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Applications for Resilient Seated Butterfly Valve
1. Chemical Industries
Chemical industries typically handle applications that involve hazardous media. A concentric butterfly valve is made with a rubber seat, made from BUNA-N or EPDM, that has excellent chemical resistance and works well with different properties of media. The valve disc is made from stainless steel, a sturdy material that can endure abrasive and corrosive flow that guarantees positive sealing.
2. Food and Beverage Industries
A resilient seated butterfly valve is also well-suited for food and beverage industries. Valve seats made from EPDM can endure CIP (Cleaning in Place) and SIP (Sterilization in Place) acids and processes and aqueous media that are typically found in these applications. The valve design does not have any dead space, which promotes hygienic applications without any risk of contamination.
3. Oil and Gas Industries
Oil and gas industries, such as Liquefied Natural Gas (LNG) and petroleum industries, require safe and smooth operations with no risks of leaking. SIO builds resilient seated butterfly valves made from epoxy-coated ductile iron to withstand demanding applications, like high pressures and corrosive media. Ductile iron is a strong material that requires minimal maintenance even when excessively used. It can also withstand corrosion and unstable conditions of system operations.
4. Water and Wastewater Services
Resilient seated butterfly valves are designed to withstand the different conditions of water and wastewater applications. They are made with a one-piece body that promotes easy and compact installation and zero chances of leakage. The materials of the valve seats allow these butterfly valves to deal with media flow that possesses different characteristics. These will include slurries, solvents, oil, water, and more.
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