Centric butterfly valve with loose liner
AVK range of loose liner butterfly valves comprises wafer, lug and U-section butterfly valves in DN25-1600 with a variant selection of disc and liner materials. Actuations available are lever, gearbox with hand wheel, electrical or pneumatic actuators.
Replaceable liner has a very robust construction. Its convex form and integrated lip sealings in the shaft passage ensure a tight connection with the shaft.Furthermore, the special shape ensures a unique grip to the body preventing any relative liner displacement during operation. The integrated gasket faces enable easy installation between flanges.
Feature summary
- Stainless steel shaft with anti-blowout design and position indication
- Square driven disc mechanism with effective power transmission
- Disc of acid-resistant stainless steel with streamlined shape for optimum flow characteristics and polished edges for minimum wear of the liner
- Replaceable EPDM liner with a unique design
- Ductile iron body with extended neck for insulation and 200my fusion bonded epoxy coating
Standard range
- Wafer DN25-1000, lug DN25-600, U-section DN150-1600
- EPDM rubber liner for drinking water (max. 70°C) and wastewater/HVAC (max. 110°C)
- Lever, gearbox, pneumatic or electric actuator
Variants for frequent operation
- Wafer DN25-400, lug DN50-400
- EPDM rubber liner for wastewater aeration/HVAC (max. 130°C), self-lubricating PTFE coated steel bearings and 200 μm polyurethane coating
Applications
The centric butterfly valve with loose liner can be used for a wide range of applications within water and wastewater treatment as well as for industrial water applications.
Water: water treatment, water distribution, pumping installation, water transmission and HVAC
Wastewater treatment: aeration systems, clean sewage water, filter installations, pumping installations and membrane installations
Industrial water: cooling water and process water
