VFG 21, PN 16, DN 250, 400.00 m³/h, Flange | Pressure Relief Controllers | Pressure and Flow Controllers | Climate Solutions for heating

Product details

Gross weight	340.5 Kilogram
Net weight	340.5 Kilogram

Volume	244.688 Liter
EAN	5702421804315

Application	District Heating
Cavitation factor	0.2
Cavitation factor 100%	0.15
Cavitation factor 25%	0.31
Cavitation factor 50%	0.25
Cavitation factor 75%	0.2
China RoHS compliance	Out of scope
Connection types	Flange
Description	VFG21 PN16 250/400 2-way flange flow/ret
Diameter [mm]	250 mm
Differential pressure range [bar] [Max]	10 bar
EU RoHS compliance	Out of scope
Flow characteristic	Linear optimized
Function	Pressure relief
In scope of WEEE and contain batteries	No
Kvs values [m³/h]	400 m³/h
Leakage through port max. [% Kvs]	0.01
Media pH [Max]	10
Media pH [Min]	7

Media temperature [°C] [Max]	150 °C
Media temperature [°C] [Min]	2 °C
Medium alternative	Glycolic water up to 30%
Mounting version	Free
Number of ports	2
Permissible media	District heating/cooling circulation water
Pressure class	PN 16
Pressure nominal [bar]	16 bar
Product group	Pressure flow controllers
Sealing material	EPDM
Spindle position	Normally open
Stroke [mm]	24 mm
Type	VFG 21
UK RoHS compliance	Out of scope
Valve body material	Grey cast iron EN-GJL-250 (GG-25)
Valve cone material	Stainless steel, mat. No. 1.4021
Valve seat material	Stainless steel, mat. No. 1.4313
Valve size	DN 250

Application	District Heating
Cavitation factor	0.2
Cavitation factor 100%	0.15
Cavitation factor 25%	0.31
Cavitation factor 50%	0.25
Cavitation factor 75%	0.2
China RoHS compliance	Out of scope
Connection types	Flange
Description	VFG21 PN16 250/400 2-way flange flow/ret
Diameter [mm]	250 mm
Differential pressure range [bar] [Max]	10 bar
EU RoHS compliance	Out of scope
Flow characteristic	Linear optimized
Function	Pressure relief
In scope of WEEE and contain batteries	No
Kvs values [m³/h]	400 m³/h
Leakage through port max. [% Kvs]	0.01
Media pH [Max]	10
Media pH [Min]	7
Media temperature [°C] [Max]	150 °C
Media temperature [°C] [Min]	2 °C
Medium alternative	Glycolic water up to 30%
Mounting version	Free
Number of ports	2
Permissible media	District heating/cooling circulation water
Pressure class	PN 16
Pressure nominal [bar]	16 bar
Product group	Pressure flow controllers
Sealing material	EPDM
Spindle position	Normally open
Stroke [mm]	24 mm
Type	VFG 21
UK RoHS compliance	Out of scope
Valve body material	Grey cast iron EN-GJL-250 (GG-25)
Valve cone material	Stainless steel, mat. No. 1.4021
Valve seat material	Stainless steel, mat. No. 1.4313
Valve size	DN 250