Frequently asked Questions

  • Date of incorporation: 1907
  • Who are the shareholders: The Ruhfus family and private investors
  • Where do we manufacture: The main production site is in Neuss. There is a further plant in China (Ningbo)
  • What markets do we supply: Hydraulic cylinders are used primarily where heavy loads have to be moved for example in the mining/ construction industries and port/shipbuilding (see Industries and References)
  • Do we have representatives in other countries: We are represented in China, India and Brazil, among others (see Distribution Partners). We would be happy to receive applications for further agencies at
  • Do we have stocks of our products: No. All products are designed and manufactured to customer requirements
  • What is the maximum size of the cylinders we produce: piston diameter up to max. 1,200, stroke up to approx. 17,000 mm
  • What is the maximum oil pressure: Max. 350 bar working pressure and 600 test pressure
  • What materials do we use:

    Material for rods:   

    1.4057 X17CrNi16-2

    1.7225 42CrMo4+QT

    1.6582 34CrNiMo6

    1.5217 20MnV6

    1.1191/ 1201 C45 E/R

    1.0577 S355J2


    Material for tubes:

    1.0580 E355+AR

    1.0576 S355J2H

    1.5217 20MnV6/MW450

  • What do we buy in: Among other things, bearings, hydraulic valves, measuring equipment, seamless tubes, hydraulic tubes and cast parts
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Industries and References