SLV
Pneumatic Center-Line Butterfly Valve
The SLV Pneumatic Center-Line Butterfly Valve pairs a concentric butterfly valve with a pneumatic actuator, so flow can be opened, closed or modulated automatically instead of by hand. It is a straightforward, economical way to automate water, air and other low-pressure services across a plant.
Product Benefits
- Quarter-turn action: A quarter-turn butterfly design gives fast, repeatable operation every time the valve is called.
- Compact, light body: The body is compact and lightweight, so it is easy to fit into existing pipework.
- Driven by plant air: The actuator removes the manual effort and inconsistency of hand-operated valves. That matters when a line has many valves or is cycled frequently.
- Two actuator types: Double-acting and single-acting versions are available, so you can choose between air-to-open/air-to-close operation or a spring-return arrangement that moves the valve to a defined position if air supply is lost.
- Tight shutoff: The soft PTFE seat seals tightly on clean, low-pressure media.
Where It's Used
- Automated isolation: Typical duties are automated on/off isolation and basic modulating control of water, air and similar low-pressure process media.
- Utility and water circuits: It suits utility lines, cooling and process water circuits, and general plant services.
- Operated from the control room: The valve is intended for lines worked from a control system rather than locally at the pipe.
- Three body styles: Wafer, lug and flanged bodies let the same valve concept fit different piping layouts, from tight pump skids to standard flanged lines.
Good to Know
- Body material choice: Bodies are offered in cast iron, carbon steel and several stainless steel grades, so the valve can be matched to the medium and the environment rather than over-specified.
- The seat does the sealing: The resilient PTFE seat is what gives the tight seal, so seat condition and compatibility with the medium are the main points to check at selection and during maintenance.
- Best on clean media: Being a concentric (center-line) design, it is best applied on relatively clean, non-abrasive media at moderate pressures.
- Aggressive chemicals: For aggressive chemicals a lined version is the more suitable choice, and SLV offers one in the same family.
