4 310 Acvatix™ 2-port seat valves PN6 with flanged connection • • • • VVF21.. Grey cast iron valve body DN 25...100 kvs 1.9...160 m3/h Can be equipped with SAX.. electromotoric or SKD..-, SKB..- and SKC..electrohydraulic actuators Use For use in heating, ventilating, and air conditioning systems as a control or safety shutoff valve. For closed circuits only (mind "Cavitation", refer to page 6).
Type summary Product number 3 DN kvs [m / h] VVF21.22 1,9 VVF21.25-2.5 2,5 VVF21.23 Sv 3 VVF21.25-4 4 25 VVF21.24 5 VVF21.25-6.3 6,3 VVF21.25 7,5 VVF21.25-10 10 VVF21.39 12 VVF21.40-16 16 40 VVF21.40 > 50 19 VVF21.40-25 25 VVF21.50 31 50 VVF21.50-40 VVF21.65 40 49 65 VVF21.65-63 VVF21.80 63 78 80 VVF21.80-100 VVF21.90 100 124 100 VVF21.
Equipment combinations Valves Actuators SAX.. H100 Δpmax 2) Δps SKD.. Δpmax [mm] 1) SKB.. Δps Δpmax SKC.. Δps Δpmax Δps 200 300 [kPa] VVF21.22 VVF21.25-2.5 VVF21.23 VVF21.25-4 600 VVF21.24 VVF21.25-6.3 600 VVF21.25 300 VVF21.25-10 VVF21.39 VVF21.40-16 300 600 20 300 500 VVF21.40 VVF21.40-25 VVF21.50 300 VVF21.50-40 VVF21.65 VVF21.65-63 VVF21.80 VVF21.80-100 VVF21.90 VVF21.
Actuator overview Product Actuator Operating Positioning Spring number type voltage signal return SAX31.00 motoric SAX81.03 - AC/DC 24 V SAX61.03 DC 0…10 V AC 230 V SKD32.51 Yes 3- position Electro- SKD82.50 - hydraulic SKD82.51 DC 0…10 V SKD62.. SKB32.50 1) SKB82.50 Electro- SKB82.51 hydraulic SKB60 Yes AC 24 V 1) SKC82.60 Electro- SKC82.61 hydraulic SKC60 120 s 2800 N N4564 120 s 2800 N N4566 120 s 30 s - Yes 3- position Yes AC 24 V DC 0…10 V SKC62..
Sizing Flow diagram -k DN Δpmax = Δpv100 = Maximum permissible differential pressure across the valve’s control path, valid for the entire actuating range of the motorized valve Differential pressure across the fully open valve by a volume flow V100 V = = = Volumetric flow through the fully open valve (H100) 1 bar ≈ 10 mWC 0.278 l/s water at 20 °C 100 100 kPa 1 m3/h Valve flow characteristic 0…30 % → linear 30…100 % → equal percentage ngl = 3 as per VDI / VDE 2173 Flow kv / kvs 1 0.8 0.
Cavitation accelerates wear on the valve plug and seat, and also results in undesirable noise. Cavitation can be avoided by not exceeding the differential pressure shown in the "Flow diagram" on page 5, and by adhering to the static pressures shown below. Note on chilled water To avoid cavitation in chilled water circuits ensure sufficient counter pressure at valve outlet, e.g. by a throttling valve after the heat exchanger.
4310D03 Working pressure [bar] Working pressure and medium temperature 6 5.5 5 4.5 4 1 0 -60 -40 -10 0 20 80 100 120 140 150 160 Medium temperature [°C] Working pressure and medium temperature staged as per ISO 7005 Current local legislation must be observed. Notes Engineering We recommend installation in the return pipe, as the temperatures in this pipe are lower for applications in heating systems, which in turn, extends the stem sealing gland's life.
Stem sealing gland The glands can be exchanged without removing the valve, provided the pipes are depressurized and cooled off and the stem surface is unharmed. If the stem is damaged in the gland range, replace the entire stem-plug-unit. Contact your local office or branch. Disposal Before disposal the valve must be dismantled and separated into its various constituent materials. Legislation may demand special handling of certain components, or it may be sensible from an ecological point of view.
Dimensions Dimensions in mm L3 K D D4 H1 D2 H2 H B 4310M01 L2 L1 Product number DN B D D2 D4 K L1 L2 L3 Ø Ø Ø 100 11 (4x) 58 75 150 75 96 78 100 180 90 112 H1 H2 H kg SAX.. SKD.. SKB.. SKC.. [kg] VVF21.22 VVF21.25-2.5 VVF21.23 VVF21.25-4 VVF21.24 25 14 34 130,5 > 476 > 534 > 609 39 135,5 > 481 > 539 > 614 4,5 VVF21.25-6.3 VVF21.25 VVF21.25-10 VVF21.39 VVF21.40-16 VVF21.40 40 VVF21.40-25 VVF21.50 VVF21.50-40 VVF21.65 VVF21.65-63 VVF21.80 VVF21.
Spare parts Order number for spare parts Set 4310Z02 Sealing gland Plug with stem, circlip, sealing Product number VVF21.22 VVF21.25-2.5 VVF21.23 VVF21.25-4 VVF21.24 VVF21.25-6.3 VVF21.25 VVF21.25-10 VVF21.39 VVF21.40-16 VVF21.40 VVF21.40-25 VVF21.50 VVF21.50-40 VVF21.65 VVF21.65-63 VVF21.80 VVF21.80-100 VVF21.90 VVF21.
