Compared to metal valves of the same dimension, the butterfly valves type 578 save up to 50 percent weight. This is due to the use of glass fiber reinforced polypropylene as housing material. Stainless steel (1.4408) threaded lug inserts ensure that the valve can be centered perfectly between the flanges. The combination of materials provides maximum strength and optimized weight. This is particularly noticable during transportation as well as in installation and maintenance. Furthermore the butterfly valves type 578 are corrosion and UV resistant.
Consistently thinking innovation ahead – Butterfly valve type 578Mar 31, 2015 10:00 AM
GF Piping Systems presents its new series of butterfly valves type 578 in the dimensions DN50 to DN300. They are specially suited to the worldwide use in chemical and water treatment applications. The newly developed glass fiber reinforced plastic lug housing convinces with highest stability, low weight and good corrosion resistance.
Rely on proven principles
For the new butterfly valve GF Piping Systems relies on the double eccentric operating principle, which is proven since the launch of the butterfly valve type 567 in 2005. The double eccentricity combined with the pressure support of the profile seal leads to a 50 percent lower actuation torque compared to centric valves. The disc does not touch the seal in the open position. This principle reduces the contact surfaces between medium and elastomers significally. This has two important positive effects: a steady operation torque ensuring save opening and closing and less wear and tear for a longer service life. This is particularly important for applications in critical areas such as in the chemical process industry. The higher operating and process safety and good chemical resistance lead to better profitability. Thus, the valves type 578 are also suitable for applications in water treatment, including drinking water treatment, swimming pools and water parks as well as wastewater systems in industrial systems like chemical plants and power plants.
The butterfly valves type 578 are available in PVC-U, PVC-C, ABS,
PP-H and PVDF in the dimensions DN50 / 2’’ up to DN300 / 12’’. Seals
seals are available in EPDM, FPM or PTFE. The design of the valves is
made for the installation in metric (ISO-DIN connection dimensions)
and ANSI systems. In Addition, the standard interface for easy
installation of actuators ist optimally designed for plastic-metal
Ex factory, the butterfly valve type 578 is supplied with a lever, manual gear operator, pneumatic or electric actuator. For the use as process or control valve a variety of accessoires like position feedback unit or ASI control heads are available.