The valve faces being double as far apart as those seen in a concentric valve.
The valve having a double function sealing system.
The valve shaft being offset from the centre along 2 axis.
The lifetime of the AVK valve being double that of most competitors.
50 - 2000
200 - 1200
200 - 2200
100 - 1800
The valve can be installed in any position: vertical, horizontal or tilting.
The valve can function as a modulating valve.
When the valve is fully closed the disc is a few degrees off from being parallel to the valve face.
The disc face is rounded.
Rubber components from AVK Gummi.
Reduced wear on the rubber sealing.
All of the above.
It eliminates the possibility of disc flutter.
It makes tampering with the disc impossible.
It has a lower manufacturing cost than other solutions.
There are no real-world advantages of a fixated disc.
The larger valves have a higher quality of EPDM rubber.
You can replace the seal on the smaller valves. This is not possible on larger valves
The shape of the rubber seal and the retaining ring.
There are no differences.
It makes tampering with the valve impossible.
It locks the disc in place when it is fully opened or fully closed.
It allows the gearbox to be locked so the valve cannot be operated by unauthorized persons.
It allows the disc to be locked in place temporarily for carrying out repairs or maintenance, such as the replacement of a gearbox.
Blast cleaning to ISO 12944-4.
Epoxy coating to DIN 30677-2 and GSK.
Quality control procedures and audits.
All of the above.
It is more economical than an integral seat.
It is lower in weight than an integral seat.
It offers more assurance against leaks.
It is replaceable and is ideal for high wear and tear systems.
It is ideal for modulation purposes.
It has a substantially reduced weight.
It is less sensitive to cavitation and offers lower headloss.
There are no inherent advantages of flow-through disc: some markets merely require this specification.
IP67 is clockwise to open, IP68 is clockwise to close.
IP67 has a 5 year warranty, IP68 has a 10 year warranty.
IP67 is made to EN standard, IP68 is made to AWWA standard.
IP67 is for above ground use, IP68 is for below ground (submerged) use.
EPDM is much easier to manufacture than almost all other types of rubber.
Resistance to common elements found in drinking water, such as ozone and chlorine.
EPDM rubber offers an excellent compression set.
EPDM is approved for drinking water purposes.