Series F-004A, F-004B

Bellows Valves with Pressure Compensation

  • Flow up to approx. 1000 ln/min
  • For low (differential) pressure applications
  • Kv: 0.03...1.0
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Series F-004A, F-004B

Control Valves for Low Pressure Drop Applications

These are direct acting control valves simular to the F-001 series. They are also closed by spring force. A bellows compensates the closing force acting on the plunger to such a degree that only a very small magnetic force is required and in this way large orifices can be opened, which is impossible in the F-001 design as it would cause oscillation. The bellows pressure compensated design, however, enables us to smoothly control large flows at extremely low pressures.

Technical specifications

Measurement / control system
Operating temperature-10... 70 °C
Max. Kv-valueF-004AC / F-004AI: 0,03...0,3
F-004BI: 0,1...1
Mechanical parts
Material (wetted parts)stainless steel 316L or comparable
Pressure rating (PN)10 bar(g)
Max. ΔPfor gases: 5 bar(d)
for liquids: 2 bar(d)
Process connectionscompression type or face seal (VCR/VCO) couplings
Sealsstandard: FKM/Viton®;
options: EPDM, FFKM/Kalrez®
WeightF-004AC / F-004AI: 1,2 kg
F-004BI: 3,4 kg
Protection classF-004AC: IP40
F-004AI / F-004BI: IP65
Electrical properties
Power supply+15...24 Vdc +/-10%
Max. power consumptionmax. 3,5 W (at 15 Vdc)
Electrical connection
Control valve options
External actuator options to be connected to the controller
Certification for hazardous areas
Approvals / certificates

Technical specifications subject to change without notice.

Technical specifications

Max. Kv-value F-004AC/F-004AI: 0,03...0,3
F-004BI: 0,1...1
Operating temperature -10…70°C
Mechanical /Electrical specifications
Material (wetted parts) stainless steel 316L or comparable
Pressure rating 10 bar(g)
Max. ΔP for gases: 5 bar (d)
for liquids: 2 bar (d)
Process connections compression type or face seal couplings
Seals Standard: Viton®;
Optional: EPDM, Kalrez®
Weight F-004AC/F-004AI: 1,2 kg
F-004BI: 3,4 kg
Protection class F-004AC: IP40
F-004AI/F-004BI: IP65
Power supply +15...24 Vdc +/-10%
Power consumption (at 15 Vdc) max. 3,5 W

Technical specifications subject to change without notice.


Dimensional drawings
Dimensional Drawing F-004AC
Dimensional Drawing F-004AI
Dimensional Drawing F-004BI
For dimensional drawings and hook-up diagrams please visit the product page on our website


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