The Pneumatic Lug style Butterfly Valve represents a modern versatile valve system which controls and regulates liquid or gaseous media flow in multiple applications. The valve system uses pneumatic actuators with central line butterfly valves to deliver dependable full open and full close operational efficiency. The valve exists in two versions: metal seal and soft seal which fulfill different sealing needs to serve multiple industrial applications.
Technical Specifications
Materials: The valve consists of high-quality materials which provide both durability and reliability. The body of the valve is made from ASTM A536 65-45-12, WCB, or CF8M, while the disc is available in ASTM A536 65-45-12 Nylon coated, CF8, CF8M, 2507, and 1.4462. The valve seat is made from EPDM, NBR, FRM, or PTFE, and the stem is made from SS420 or SS431.
Size and Design: The valve operates within a nominal diameter range of 2″ – 80″ (DN50mm – DN2000mm) to accommodate diverse applications. The LUG body style of this valve combines a strong construction with an ISO5211 top flange design.
Temperature Range: The valve operates between -20 °C and + 120 °C and can be used in a wide range of temperature conditions based on pressure, medium, and material factors.
Operating Pressure: The valve operates at 16bar pressure for DN50-DN300 sizes and 10bar pressure for DN350-DN2000 sizes.
Valve Structure: The Pneumatic Lug Butterfly Valve supports multiple flange accommodations including EN 1092 PN 6/PN10/PN16, ASME Class 150, AS 4087 PN10/ PN16, and JIS 5K/10K which expands its usage possibilities.
Pneumatic Actuator: The valve provides three operational modes which include double-acting (failure to maintain), single-acting normally closed (failure to close) and single-acting normally open (failure to open) actions. The pneumatic actuation system of this valve offers adjustable functionality to match different operational needs.
Optional Accessories
The Pneumatic Lugged Butterfly Valve comes with optional accessories which include a solenoid valve, limit switch box, air filter relief pressure valve, E/P positioner, and manual device for improved performance and control.
Installation and Operation
The Pneumatic Lug Valve requires simple installation through the process of aligning its valve body with the mounting flange holes in your system. The valve stem connects to the pneumatic actuator after mounting which enables the valve to function through a 90-degree rotation of the valve disc. The valve operates through a complete open or close motion which provides exact and dependable control of fluid flow.
The lug butterfly valve represents a superior flow control device which demonstrates strong construction and wide-ranging use in petrochemical processing and water and wastewater management and HVAC operations. The valve design includes threaded inserts that run along the perimeter of the valve body to enable direct bolting to flanges which creates a secure and stable connection in piping systems.
How does a lug butterfly valve work?
The lug butterfly valve functions through rotational motion to control fluid dynamics in industrial systems. The device features a disc as its main flow control element which rests on a strong shaft that runs through the valve diameter. The disc moves through the pipeline by an actuator system which includes manual or pneumatic or electric operation to achieve smooth transitions between open and closed positions and all positions in between.
Pneumatic actuator working principle:
Double acting
(Counterclockwise)
Compressed air to Port 2 forces the pistons outwards, causing the output shaft to turn counterclockwise, while the air is being exhausted from Port 4.(Clockwise) Air to Port 4 forces the pistons inwards, causing the pinion to turn clockwise while the air is being exhausted from Port 2.
Single acting
(Clockwise)
Loss of air pressure, the stored energy in the springs forces the pistons inwards,the pinion turns clockwise, while air is being exhausted from Port 4.
(Counterclockwise)
Compressed air to Port 2 forces the pistons outwards, causing the output shaft to turn counterclockwise, while the air is being exhausted from Port 4.(Clockwise) Air to Port 4 forces the pistons inwards, causing the pinion to turn clockwise while the air is being exhausted from Port 2.
Single acting
(Clockwise)
Loss of air pressure, the stored energy in the springs forces the pistons inwards,the pinion turns clockwise, while air is being exhausted from Port 4.
