Belimo releases a grooved 2-way and 3-way butterfly valve series ranging in size from 2" to 12" (50-300 mm) with spring, non-spring or electronic fail-safe actuators. The unique design of the offset disc and two-piece stem offers increased flow and reduces operating torque up to 35% providing a 360º bubble-tight seal (at fully rated pressure, 300 PSI, in either direction). The 
Grooved Butterfly Valve has a longer life expectancy than most conventional valves. The valve offers:
- Easy to fit, maintenance free and energy savings.
- Requires 45% less man-hours on average over welding offer you installation savings.
- Eliminates costly fire watch and hazardous fumes and flames.
- Offering reduce material handling by 30-70%.
- Rated for 300 PSI for water, oil and gas.
- Pressure enhanced rubber seat within the valve body seals equally on both sides of the valve. This patent-pending feature minimizes long-term wear, resulting in higher cycle life.
- Patented cartridge design with redundant and replaceable stem seals increases reliability and ease of service.
- Combination of stem bearings and a pressure-enhanced rubber seat keeps torque consistent over the life of the valve.
- Unique, square, integral neck design with standard ISO top flange allows for direct mounting of Belimo spring return, non-spring return and electronic fail-safe actuators.
- Rugged design delivers bi-directional shut-off and dead-end capabilities to the full rated working pressure (300 PSI) and Cv from 115 to 9000.
- Valves can be used for system isolation in either a flow direction, simplifying installation and permitting use as an end-of-line isolation valve without the need for cap/flange installation.