ACVATIX™ Butterfly valves PN 16 VFF41.. ● ● ● ● ● ● ● ● A6V12045425_en--_b 2020-08-12 Concentric, double flanged type Nodular cast iron valve body DN 40...900 kvs 55...74,020 m3/h For fitting with PN 16 counter-flanges to ISO 7005 Tight-closing in accordance with ISO 5208, leakage rate A No maintenance required Can be equipped with SQL321B.., SQL361B..
Use This device is used as motorized or shut-off valves in heating, ventilation and air conditioning systems applications. ● In open and closed circuits ● For 2-position (SPDT) (by SQL321B…) ● For DC 0…10 V control signals (by SQL361B.. actuator) and 4..20 mA control signals (by SQL351B..
Equipment combinations Electromotoric Actuators Butterfly Valve SQL321B25 SQL361B25 SQL351B25 SQL321B50 SQL361B50 SQL351B50 SQL321B150 SQL361B150 SQL351B150 SQL321B270 SQL361B270 SQL351B270 SQL321B570 SQL361B570 SQL351B570 SQL321B1400 SQL361B1400 SQL351B1400 SQL321B2650 SQL361B2650 SQL351B2650 SQL321B6000 SQL361B6000 SQL351B6000 ∆ps[kPa] VFF41.40 1000 - - - - - - - VFF41.50 1000 - - - - - - - VFF41.65 1000 - - - - - - - VFF41.80 1000 - - - - - - - VFF41.
Actuator overview Product No. Position Operating Voltage Positioning Signal Feedback Signal Positioning Time for 90° at 50 Hz [s] Nominal Torque [Nm] Flange Connection EN ISO 5211 SQL321B25 2-position (SPDT) - 11 25 F07 SQL361B25 DC 0…10 V DC 0…10 V 11 25 F07 SQL351B25 4..20mA 4..20mA 11 25 F07 SQL321B50 2-position (SPDT) - 19 50 F07 SQL361B50 DC 0…10 V DC 0…10 V 19 50 F07 SQL351B50 4..20mA 4..
Mechanical design Ring format, nodular cast iron valve body with EPDM-HT seat and multiple shaft bushing. The seat is also used to seal the flange. There is thus no contact between the me-dium and the valve body. Sizing Flow diagram Flow characteristic pv100 = V100 = 100 kPa 3 1 m /h Siemens Smart Infrastructure Differential pressure across the fully open butterfly valve by a volume flow V100 Volume flow through the fully open butterfly valve = 1 bar 10 mWC = 0.
Flow kv / kvs Angle of rotation [°] Engineerging Notes Single flange mounting is possible: 1000 kPa The VFF41.. butterfly valves can accommodate flow in either direction. Warning To avoid pressure shocks on the butterfly valve, the VFF41.. must be driven to its fully open position either manually or via control signal Y14 prior to activat-ing the pump(s). Mounting notes The mounting instruction A6V12045430 is enclosed in the product pack-aging.
Maintenance notes Caution The VFF41.. butterfly valves require no maintenance. Before performing any service works on the valve, actuator or mounting kit: • Switch off the pump and power supply • Close the main shut-off valves in the pipe work • Release pressure in the pipes and allow them to cool down completely If necessary, disconnect electrical connections from terminals. The valve must be commissioned only with the actuator correctly assembled.
Technical data Functional data PN class Permissible operating pressure Flow characteristic Leakage rate Permissible medium Medium temperature Flow Velocity Flange connection for pipes 1) Face to face dimension Top flange (flange for actuator) Angle of rotation PN16 to EN1333 1600 kPa (16 bar) According to the diagram on page A to ISO 5208 (tight-closing) Chilled water, low temperature hot water, cooling water, brine, demineralized water (softened), water with antifreeze Recommendation: Water treatment t
Dimensions Dimensions in mm: Product model DN L1 L2 H H1 H22) H3 ØD3 E PN 16* EN ISO Connecting 5211 n-ØD4 ØD6 □A a° Net weight （kg） ØD1 ØD2 N-ØD5 VFF41.40 40 106 0 577 202 113 14 90 9 150 110 4-19 45 6 VFF41.50 50 108 0 582 211.5 115 14 90 9 165 125 4-19 45 8 VFF41.65 65 112 0 590 228.5 122 14 90 9 185 145 4-19 45 10 VFF41.80 80 114 0 597 242 128 14 90 9 200 160 8-19 45 11 45 13 45 20 45 23 45 31 11 F07 4-10 70 VFF41.
Application restriction Operation parameter Parameter Value Comment 1 Environmental conditions Class 3k5 EN 60721-3-3 2 Temperature -10...+55 °C EN 60721-3-3 3 Humidity 5...95 % RH EN 60721-3-3 Parameter Value Comment 1 Environmental conditions Class 2K3 EN 60721-3-2 2 Temperature -30...+65 °C EN 60721-3-2 3 Humidity <95 % RH EN 60721-3-2 Parameter Value Comment 1 Environmental conditions Class 1K3 EN 60721-3-1 2 Temperature -15...+50 °C EN 60721-3-1 3 Humidity 5..
