![AFQM 2, PN 16, DN 250, Flow rate [m³/h]: 100.00 - 500.00, Flange, Mounting version: Free](https://assets.danfoss.com/drawings/preview/186631/ID384036911163-0101_preview.jpg?w=96&h=96 "AFQM 2, PN 16, DN 250, Flow rate [m³/h]: 100.00 - 500.00, Flange, Mounting version: Free")
Pressure independent control valve
| Gross weight | 428.5 Kilogram |
| Net weight | 401 Kilogram |
| Volume | 796.8 Liter |
| EAN | 5714279065176 |
| Gross weight | 428.5 Kilogram |
| Net weight | 401 Kilogram |
| Volume | 796.8 Liter |
| EAN | 5714279065176 |
| Actuator diaphragm material | EPDM (Rolling, fibre enforced) |
| Actuator size [cm²] | 320 cm² |
| Application | District heating and cooling |
| Cavitation factor | 0.3 |
| Cavitation factor 100% | 0.22 |
| Cavitation factor 25% | 0.36 |
| Cavitation factor 50% | 0.36 |
| Cavitation factor 75% | 0.27 |
| China RoHS compliance | Out of scope |
| Connection size | DN 250 |
| Connection types | Flange |
| Description | Pressure independent control valve |
| Diameter [mm] | 250 mm |
| Differential pressure range [bar] [Max] | 10 bar |
| EU RoHS compliance | Out of scope |
| Flow control | Yes |
| Flow limitation | Yes |
| Flow rate [m³/h] | 500 m³/h |
| Flow rate [m³/h] [Max] | 500 m³/h |
| Flow rate [m³/h] [Min] | 100 m³/h |
| Flow restrictor diff.pressure - dpb [bar] | 0.5 bar |
| Function | Flow controller with int. control valve |
| Function VSP - P | No |
| Function VSP - Q | No |
| Function VSP - T | No |
| In scope of WEEE and contain batteries | No |
| Kvs values [m³/h] | 800 m³/h |
| Leakage rate [% Kvs] | 0.01 |
| 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 |
| Operating pressure [bar] [Max] | 16 bar |
| Permissible media | District heating/cooling circulation water |
| PN alternative VSP | 25 |
| Pressure class | PN 16 |
| Pressure controller | No |
| Pressure nominal [bar] | 16 bar |
| Pressure relieve system control valve insert | Chamber |
| Product group | Pressure flow controllers |
| Sealing CV material | EPDM |
| Sealing DP material | EPDM |
| Select if the Shock valve should be with a Fixed pressure or Adjustablepressure | Fixed |
| Stem position | Normally open |
| Stroke [mm] | 32 mm |
| Type | AFQM 2 |
| UK RoHS compliance | Out of scope |
| Valve body material | Grey cast iron EN-GJL-250 (GG-25) |
| Valve cone CV material | Stainless steel mat. No. 1.4021 |
| Valve cone DP material | Stainless steel mat. No. 1.4021 |
| Valve seat DP material | Stainless steel, mat. No. 1.4021 |
| Valve seat material | Stainless steel, mat. No. 1.4021 |
| Valve size | DN 250 |
| Actuator diaphragm material | EPDM (Rolling, fibre enforced) |
| Actuator size [cm²] | 320 cm² |
| Application | District heating and cooling |
| Cavitation factor | 0.3 |
| Cavitation factor 100% | 0.22 |
| Cavitation factor 25% | 0.36 |
| Cavitation factor 50% | 0.36 |
| Cavitation factor 75% | 0.27 |
| China RoHS compliance | Out of scope |
| Connection size | DN 250 |
| Connection types | Flange |
| Description | Pressure independent control valve |
| Diameter [mm] | 250 mm |
| Differential pressure range [bar] [Max] | 10 bar |
| EU RoHS compliance | Out of scope |
| Flow control | Yes |
| Flow limitation | Yes |
| Flow rate [m³/h] | 500 m³/h |
| Flow rate [m³/h] [Max] | 500 m³/h |
| Flow rate [m³/h] [Min] | 100 m³/h |
| Flow restrictor diff.pressure - dpb [bar] | 0.5 bar |
| Function | Flow controller with int. control valve |
| Function VSP - P | No |
| Function VSP - Q | No |
| Function VSP - T | No |
| In scope of WEEE and contain batteries | No |
| Kvs values [m³/h] | 800 m³/h |
| Leakage rate [% Kvs] | 0.01 |
| 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 |
| Operating pressure [bar] [Max] | 16 bar |
| Permissible media | District heating/cooling circulation water |
| PN alternative VSP | 25 |
| Pressure class | PN 16 |
| Pressure controller | No |
| Pressure nominal [bar] | 16 bar |
| Pressure relieve system control valve insert | Chamber |
| Product group | Pressure flow controllers |
| Sealing CV material | EPDM |
| Sealing DP material | EPDM |
| Select if the Shock valve should be with a Fixed pressure or Adjustablepressure | Fixed |
| Stem position | Normally open |
| Stroke [mm] | 32 mm |
| Type | AFQM 2 |
| UK RoHS compliance | Out of scope |
| Valve body material | Grey cast iron EN-GJL-250 (GG-25) |
| Valve cone CV material | Stainless steel mat. No. 1.4021 |
| Valve cone DP material | Stainless steel mat. No. 1.4021 |
| Valve seat DP material | Stainless steel, mat. No. 1.4021 |
| Valve seat material | Stainless steel, mat. No. 1.4021 |
| Valve size | DN 250 |