AVK control valves: The safe choice for network stability
AVK's diaphragm-operated control valves represent safety and reliability. These valves are meticulously designed in accordance with EN 1074-5, ensuring network stability, precise regulation, effortless maintenance, and long durability.
The uniqueness of AVK control valves
AVK control valves stand out as the ultimate choice, promising precision in regulation, ease of maintenance, and exceptional longevity, thanks to their exclusive features:
- Standard stainless steel AISI 316 for all non-coated metal parts
- Fusion bonded GSK approved epoxy coating (300 micron)
- AVK's own rubber compounds approved for drinking water
- A modular pilot system, enabling seamless adaptation to various applications without valve replacement
- Adjustment of regulating speed for full control
- Parabolic plug design provides precise regulation and stability at low flow
- Large diaphragm secures fast reaction to minor changes in pressure
- Lifted seat prevents damage inside the valve body due to cavitation
- AVK design and manufacture with 100% pressure test and 10-year warranty
Innovative control valve with patented modular pilot system
The modular design with interchangeable parts offers great flexibility as the pilot system is easily altered to fit other or multiple applications without replacing the valve. The pilot system consists of three main components:
- The distribution block (1) connects the pilot system to the main valve. As a unique feature, it offers adjustment of regulating speed for full control, easily adjusted using standard tooling, and giving full control e.g. in situations, where water hammer may occur.
- The filter (2) features high capacity and easy maintenance. When using the optional flush valve it also offers easy access to cleaning, while the valve is in operation.
- The hydraulic control block (3) can be set up for different applications. It features easy hand adjustment of the balanced pilot valve which is capable of very precise settings.
Superior external pipework and high-quality materials
The external pipework not only conserves space but also minimizes vulnerability during installation compared to many other control valves. It is designed with components featuring standard threads for easy sourcing of replacements and easy fitting using standard tools. All metal parts are of stainless steel AISI 316.
The valve's body and bonnet are constructed from ductile iron and coated with GSK approved epoxy, while the diaphragm, manufactured by AVK GUMMI, is made of EPDM rubber approved for drinking water with polyamide reinforcement. All non-coated internals are of stainless steel AISI 316 and all materials are WRAS approved.
Large diaphragm design (1) secures fast reaction to changes in pressure. Support below the diaphragm gives less stress near closed position.
Lifted seat design (2) prevents damage inside the valve body caused by cavitation.
Parabolic plug design (3) provides precise regulation and stability at low flow. Furthermore, it reduces noise and vibration. See characteristics, illustrating the performance compared to a standard flat plug design.
Control valves with reduced and full bore
AVK control valves are available in DN50-600, with options for reduced and full bore versions. Reduced bore control valves are suitable for most applications, as the smaller bore often offers more accurate regulation. Control valves with full bore are recommended, if high Kv values are needed, e.g. in front of hydrants, or if very low head loss is required.