Series F-033, F-042

Vary-P Control Valves

  • Flow up to approx. 100 ln/min
  • Pressure up to 350/650 bar
  • For high (differential) pressures applications
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Series F-033, F-042

High Pressure Control Valves for Gases

F-033 / F-042 are 2-phase control valves for applications with high differential pressures, up to 350 bar and a maximum operating pressure of 350 resp. 650 bar! These unique valves feature a pressure compensation mechanism, maintaining a constant pressure difference of 4 bar across the flow control section. By doing so both the inlet pressure and the outlet pressure may change without having any impact on the Vary-P valve function.

Technical specifications

Measurement / control system
Operating temperatureF-033C: -10...70°C
F-033CI / F-042CI: -10...70°C
F-033CX: -10...65°C
Mechanical parts
Material (wetted parts)stainless steel 316L or comparable
Pressure rating (PN)F-033 series: 350 bar(a)
F-042 series: 650 bar(a)
Min. ΔP6 bar(d)
Max. ΔPup to 350 bar(d)
Process connectionsF-033 series: compression type or face seal (VCR/VCO) couplings;
F-042 series: none (female thread); special high pressure connections on request
Sealsstandard: Viton®;
on request (F-033 series only): EPDM, Kalrez®
Protection classF-033C: IP40
F-033CI / F-042CI: IP65
F-033CX-XBB: II 1 G/D Ex ia IIC T6
F-033CX-XCB: II 2 G/D Ex e mb II T4
Electrical properties
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.


Dimensional drawings
Dimensional Drawing F-033C nc
Dimensional Drawing F-033CI
Dimensional Drawing F-033CX-XBB
Dimensional Drawing F-033CX-XCB
Dimensional Drawing F-042CI
Hook-up diagrams
For dimensional drawings and hook-up diagrams please visit the product page on our website