Butterfly Valves
Butterfly valves in various nominal sizes and materials. We look forward to your inquiry.
Manually operated butterfly valves
Housing materials: stainless steel, GG-25, GGG-40, aluminum
Versions: Wafer or LUG connection
Operation: hand lever or gear with handwheel
Valve discs: GGG, stainless steel, PTFE-coated
Cuffs: FKM, NBR, EPDM, PTFE
Sizes: DN25 to DN600
Approvals: DVGW-GAS, DVGW-Wasser, TA-Luft
Pneumatically operated butterfly valves
Housing: stainless steel, GG-25, GGG-40, aluminum (1-piece, 2-piece)
Connection: Wafer, LUG
Actuation: Pneumatic (single or double acting)
Valve discs: GGG, steel/GGG-galvanized, stainless steel
Cuffs: FKM, NBR, EPDM, PTFE
Sizes: DN40 to DN300
Approvals: DVGW-GAS, DVGW-Wasser
Electrically operated butterfly valves
Butterfly valve with mounted electric, single-phase motor drive. Incl. manual
operation, optical position indicator and
two additional limit switches.
• Flange connection
• DN50-100
• Flow medium: Liquid, viscous
and gaseous media
• Medium pressure: 0 - 16 bar
Spare parts
Series: WA/WM, TA/TM
Sizes: DN40 to DN400
Function of a butterfly valve
Butterfly valves control the flow of a medium through a pipeline, with a rotating disc in the flow path regulating the flow. When the disc is parallel to the flow, the valve is fully open.
Variants and differences
Butterfly valves are versatile, designed to be flow efficient and easy to automate. They are characterized by robustness, a long service life and a high number of switching cycles.
Manually operated butterfly valves
Manual butterfly valves can be operated using a worm gear or a hand lever. The hand lever has up to 10 locking positions and uses a ratchet disc to indicate the current position of the valve disc.
Butterfly valves with pneumatic drive
Pneumatically operated butterfly valves are often used in potentially explosive areas because they are safer than electrical versions. There are two types of pneumatic actuators:
Double-acting: The flap is operated with compressed air both for opening and closing.
Single-acting: The flap is operated in one direction by compressed air, while springs ensure return.
Since 1958
"Precise butterfly valves for maximum safety in industrial applications
– ideal for liquids and gases."
Butterfly valves with electric drive
Electric butterfly valves are particularly ideal for applications where frequent or remote operation is required.
In explosive environments, pneumatic solutions are preferred for safety reasons.
Automation of butterfly valves
Butterfly valves can be operated both manually and automatically. The following questions must be clarified when selecting the appropriate actuator:
What is the required torque of the valve disc?
Is it a lubrication-free medium?
Is electrical, hydraulic or pneumatic operation required?
Should the drive run in normal or control mode?
Spare parts for butterfly valves
Depending on the type of medium and the operating conditions, the sleeve of a butterfly valve can wear out, especially with aggressive media. Replacement sleeves in various designs and sizes are available. Some sleeves have additional reinforcement rings for increased resistance.
Areas of application
Butterfly valves are used in various industries and applications, including:
Wastewater treatment
Fuel production
Process engineering
Mining
Steel industry
Food industry
Automotive industry
Energy industry
Medical technology
Chemical and pharmaceutical industry
irrigation
Swimming pool construction
Suitable media
Butterfly valves are suitable for a wide range of media in systems and machines, such as:
Water
Wastewater
Seawater
Gases
Air
Plastics
Bulk goods
Oils
Fats
Groceries
Fuels
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