Control Trim Set

The ideal trim set for any application


The control trim set forms the heart of the control valve and consists of the plug head with its characteristic curve and the defined seat. We manufacture this trim set from the same materials as used in the body or from special materials such as Hastelloy C4 or titanium. To seal off components subject to static load O-rings made of EPDM or FPM, or Teflon-coated rings are used. The most important seal to the stem is the maintenance-free bellows made of PTFE.

Exner turned part

The trim set is made of the same material as the valve body


  • PVC (Polyvenyl chloride)
  • PP (Polypropylene) 
  • PVDF (Polyvenylidenfluoride)
  • PTFE (Polytetrafluoroethylene)
  • FKM (Viton® fluororubber)
  • FEP-FKM (FEP-covered
  • Viton®-ring)
  • Kalrez®
  • other materials on request
Exner plug

Flow characteristics and cv-values

With the latest software flow gradients can be realistically simulated. EXNER valves provide the possibility to choose different regulating characteristics and selectable Cv – values; this enables selection of an ideal control valve for any application.


® 2019 FRANK GmbH | Imprint | GTC | print

Since 1965