Butterfly valves PN16 VFF41

Butterfly valves PN16 VFF41
● Concentric, double flanged type

● Nodular cast iron valve body

● DN 40...900

● k vs 55...74,020 m 3 /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.., and SQL351… electromotoric actuators

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.. actuator)

● For chiller and cooling tower sequencing circuits

● To open or close the flow to a heat exchanger or to complete plant sections

Equipment combinations
Butterfly valves	SQL321B25	SQL321B50	SQL321B150	SQL321B270	SQL321B570	SQL321B1400	SQL321B2650
	SQL361B25	SQL361B50	SQL361B150	SQL361B270	SQL361B570	SQL361B1400	SQL361B2650
	SQL351B25	SQL351B50	SQL351B150	SQL351B270	SQL351B570	SQL351B1400	SQL351B2650
	∆ps[kPa]
VFF41.40	1000	-	-	-	-	-	-
VFF41.50	1000	-	-	-	-	-	-
VFF41.65	1000	-	-	-	-	-	-
VFF41.80	1000	-	-	-	-	-	-
VFF41.100	-	1000	-	-	-	-	-
VFF41.125	-	1000	-	-	-	-	-
VFF41.150	-	1000	-	-	-	-	-
VFF41.200	-	-	1000	-	-	-	-
VFF41.250	-	-	-	1000	-	-	-
VFF41.300	-	-	-	1000	-	-	-
VFF41.350	-	-	-	-	1000	-	-
VFF41.400	-	-	-	-	1000	-	-
VFF41.450	-	-	-	-	-	1000	-
VFF41.500	-	-	-	-	-	1000	-
VFF41.600	-	-	-	-	-	-	1000
VFF41.700	-	-	-	-	-	-	1000
∆ps = Maximum permissible differential pressure at which the motorized butterfly valve will close securely against the pressure (close off pressure)