VZFH / Spring force – Hydraulical

Storm brake / rail clamp type VZFH, Spring force – hydraulically

Application areas:

  • Crane systems
  • Offshore / Ship
  • Steel industry
  • Railbound hall roofs / gates

Product type:

  • VZFH / Spring force – hydraulically

Product description

Storm brake / rail clamp to protect crane systems or railbound machines against unwanted movements e.g. storm.

  • Closing by spring force with toggle lever system – adjustable by throttle
  • Opening by hydraulic-cylinder
  • Restraining / holding forces up to 640 kN per clamp
  • Guidance on rail system with guide rollers
  • Limit switches monitoring for clamp position
  • Vertical movement compensation of ± 20 mm
  • Lateral compensation for rail misalignment of ± 25 mm
  • Flange mounting according to customers request
  • Cabinet stiffeners for buffer attachments
  • Bolts made of stainless steel material
  • Resleeved bearings
  • Clamping jaws will be adjusted to rail clamp type
  • Cover with side flap
  • Self-acting in case of power failure
  • MADE IN GERMANY, own production

NEW: With lifting and positioning function / type VZFH-HVZ
NO contact to the rail during crane travel (especially for fast speed cranes)
NO wear during crane travel due to rail contact!

Functional principle

  • Closing by spring force with toggle lever system – adjustable by throttle
  • Opening by hydraulic-cylinder
  • Automatically closing function in case of power failure
  • A vertical and horizontal guiding system avoids tilting of the clamp carriage when clamp levers are opened
  • Hand pump for emergency operation (manual) is supplied as standard

Technical benefits

  • No loss of restraining / holding force due to toggle lever transmission (resulting e.g. wear of clamping jaws)
  • Technical flexibility
  • High quality and safety level (Reduction of follow-up costs)

{{ Reparatur }}

Additional to own brand production, RFT is specialized in repairing storm brakes / rail clamps of other brands due to in-house production flexibility.

Rail clamps show wear due to the fact that they are in use over many years, which means they no longer have the neccessary safety levels required.

  • Functional analysis oft he rail clamp / storm brake
  • Renewal of the clamping jaws
  • Renewal of the bushes
  • Renewal of the axis
  • Renewal of the wheels
  • New painting
  • In case of extreme steel wear the construction will be overhauled and restored into the original condition
  • High-grade 2-component paint

In specific situations, the RFT can provide a storm brake as a ring exchange.Therefore the Intralogistics and safety operates smoothly and is undisturbed.

Please indicate your existing rail clamp type.


  • Special flange mounting
  • Special painting (Please specify RAL color)
  • Special construction
Spaans babcock