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Butterfly valves

Versatile flow control solutions

Butterfly valves are versatile valves used for opening, closing, and flow regulation. Economical and compact, they offer excellent sealing in both directions, adapt easily and cost-effectively to automation, and operate with low pressure losses.

Types: With plate and with lug

Materials: 304/316 stainless steel, GGG40, GG25

Controls: Manual, pneumatic, electric, geared

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Main characteristics of butterfly valves

Compact and economical design for a small footprint
Quick opening and closing for efficient flow control
Control options: manual, pneumatic, electric, or geared
Available materials: 304/316 stainless steel, GGG40 cast iron, GG25
Sealing gaskets: EPDM, NBR, Teflon, Viton depending on the application
Maximum operating pressure: 16 bar
Operating temperature up to 180°C depending on the model

Types of butterfly valves

We offer two types of butterfly valves: wafer and lug. The main difference between these two types lies in their method of connection to the pipeline. Wedge butterfly valves are attached to the flange with individual bolts, allowing for cleaning, inspection, and repair without completely interrupting production. In contrast, wafer butterfly valves are attached to the flange with studs. Consequently, cleaning, inspection, and repair of these valves require a complete system shutdown.

Our range of butterfly valves

Connection type: Pad-type, lug-type

Our types of seals: EPDM, NBR, TEFLON, VITON

Valve types: Nickel, AISI304, AISI316; Teflon shaft: AISI 420

Valve control types: Pneumatic actuator, Electric actuator, Gearbox, Lever

Maximum operating pressure: 16 bar

Design and operating principle

Butterfly valves are a versatile type of valve used to regulate flow in pipelines. They get their name from the shape of their flap, which resembles a butterfly's wing. Thanks to their quick opening and closing and compact design, these valves are frequently used in low-pressure systems and large-diameter pipes.

The basic components of a butterfly valve include a disc, a stem, and a body. The disc is a rotating shaft that passes through the center of the valve. By rotating the stem, the user adjusts the position of the disc within the cross-section of the pipe, thus increasing or decreasing the fluid flow area.

Industrial application areas

Agrifood

Hygiene, safety, and process efficiency are paramount in the food and beverage industry. Our easy-to-clean and hygienic stainless steel solutions ensure safe operation across a wide range of production lines, from dairy and beverages to fruit juice and beer production.

Automobile

In the automotive industry, temperature control and fluid management are essential in processes such as production lines, testing systems, and paint applications. Our compact and robust equipment ensures energy efficiency and operational continuity in these processes.

Marine

Marine applications demand equipment that can withstand extreme environmental conditions and has a long service life. Our saltwater-resistant, low-maintenance solutions reliably provide cooling, heating, and fluid control in ship systems.

HVAC

Efficiency and longevity are essential for air conditioning and domestic hot water systems. Our heating, cooling, ventilation, and domestic hot water solutions optimize energy savings and system performance in the building sector.

Petrochemical and Pharmaceutical

These industries require equipment capable of withstanding high temperatures and pressures. They also require system solutions that can handle corrosive and aggressive gases and liquids. We offer robust structures that meet these requirements, thus ensuring process safety and continuity.

Metallurgical industry

Systems subjected to high temperatures and pressures during metalworking processes require durable and long-lasting solutions. Our products, which guarantee reliability and process stability on industrial production lines, optimize productivity.

Energy

Efficiency is crucial for power generation, cogeneration, and heat recovery systems. Our high-performance solutions help reduce energy costs while ensuring the sustainable operation of these systems.

Textile

Temperature control and energy efficiency are essential in processes such as printing, dyeing, finishing, and drying. Our solutions, specifically designed for textile production processes, improve operational efficiency and optimize energy consumption.

Technical advantages of butterfly valves

• Fast operation: quick opening and closing

• Compact size: small footprint

• Low cost: economical option

• Low pressure losses

• Excellent two-way sealing

• Easy adaptation to automation

• Various ordering options

• Materials suitable for different applications

• Easy to install and maintain

• Compatible with large diameter pipes

Frequently Asked Questions

Frequently asked questions about butterfly valves

Wafer-type installations involve securing the valve between two flanges using studs, allowing for quick and cost-effective installation. However, dismantling and maintenance require a complete pipeline shutdown. Lug-type installations use separate bolts for each flange, enabling maintenance by disabling one side of the pipeline and removing the valve. Lug-type installations are suitable for applications requiring frequent maintenance and critical pipeline isolation, while wafer-type installations are better suited for routine applications where space and cost are primary considerations.

EPDM excels in general applications with water and mild chemicals, NBR in contact with oils and hydrocarbons, Viton in aggressive fluids at high temperatures, and PTFE in applications requiring broad chemical resistance. Truevalve valves operate reliably up to 16 bar and 120°C for the standard series, and up to 180°C for models with PTFE seals. Selecting the correct seal, based on the chemical compatibility chart and the actual process temperature, is crucial for valve sealing and service life.

Butterfly valves are frequently used for partial modulation and on/off operation; the flow rate varies almost linearly with the disc angle, and pressure losses are low. If fine adjustment and precise control over a wide range are required, a motorized version with a gearbox and positioner or an actuator-driven version is preferable. To avoid the risk of cavitation and disc vibration, it is recommended to limit the throttling ratio for high pressure differentials and to maintain sufficient straight pipe length upstream and downstream of the valve.

Pneumatic actuators excel in lines requiring process reliability thanks to their rapid response and spring return (integrated safety); electric actuators (220 V AC or 24 V DC) offer simplified installation in facilities without a compressed air network. Both types integrate easily with SCADA and DDC systems via limit switches, solenoid valves, air preparation units, or modulation boards/positioners.

The GGG40/GG25 valve bodies offer a good balance between durability and cost-effectiveness for standard industrial lines; the AISI 304/316 stainless steel used for the valve body meets corrosion resistance and hygiene requirements. The AISI 420 stainless steel stem ensures high mechanical strength. The selection of a suitable combination of stainless steel and PTFE/EPDM fluid contact parts for seawater, chemical, and food and beverage applications ensures perfect sealing and a long service life.