Small enough to be flexible, big enough to solve your problem

+31 (0) 180 46 34 71
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Valve industry

One of our largest customers is the valve industry. With over 25 years of knowledge and experience and several major players in this industry as a customer, we may call ourselves specialist in the production of valve parts.

Specialist in parts for valves

We have an extensive machinery, equipped with all the right tools for every solution. This enables us to not only machine plastics, like PCTFE for cryogenic applications, PEEK and Polyimides, but also:

  • carbon graphite, which we lathe into seats, bearing bushes or sealing rings and
  • metals like stainless steel, titanium, nickel aluminium bronze, Hastelloy and Duplex, which we machine to manufacture retainers* and rings.

*We can fit metal retainers with fluoroplastics, moulded graphite and/or hard graphite seals to form seat assemblies.

Parts according to your specifications

We produce parts for different types of valves such as: ball, butterfly, check, gate, globe and needle valves. Our valve parts are used in the marine, offshore and chemical industries, as well as in transport and transhipment (specifically for liquid transport and LNG transport) and other sectors. We produce the parts according to your specifications. We produce amongst others:

  • Seat cage
  • Seat gasket
  • Seat/front seal/seat insert
  • Seat retainer/seat holder
  • Spiral wound gasket
  • Stem bearing/bushing
  • Stem packing/seal
  • Stem thrust bearing
  • Stem tip
  • Trunnion bearing
  • Thrust washer

Are you interested in our custom-made parts for the valve industry? Please contact our sales department, call +31 (0) 180 46 34 71 or send an e-mail to

More valve industry products

  • Ball valve parts

    Ball valve parts

    Ridderflex supplies a.o. chevron sets, seat assemblies, spiral wound gaskets, back-up rings and o-rings to the ball valve industry.

  • Ball valve seat assy: the summit of custom-made

    Ball valve seat assy: the summit of custom-made

    25-10-2018 The summit of a custom-made product is our ball valve seat assembly. We compile this seat assy of multiple parts of different materials. Often metals are combined with graphite (hard or soft) and plastics.

  • PCTFE products

    PCTFE products

    Semi-finished and custom-made products such as sheet, rod, tube, cylinder, seat, wear ring and c-ring.


ISO including co-engineering

Ridderflex complies with international quality management requirements. We are now also certified for co-engineering – our strength – . Read more


Any questions about products or make an enquiry? Simply call us or send us an e-mail. +31 (0) 180 46 34 71