Portable machines for high-speed grinding of hard sealing surfaces (≥ 35HRC) in high-pressure gate valves and wedges and check valves and disks of various design.

High-speed, gear-driven planetary wheels enable the HSL to produce the highest removal rates in the industry.

Fitted with SLA series planetary gears for use with driven GSS grinding spindles, this machine is ideal for repair work on wider seats of parallel slide gate valves and wedges as well as check valves and disks.

  • Grinding speed up to 826.8“/s (21 m/s)
  • Material removal rates of up to 0.08“/h (2mm/h) for Stellite 6 (dia. 13.8″, 350mm) and Stellite 21 (dia. 11.8“, 300mm)
  • 90% faster
  • Patented

Drive: electric 230/120 V, 50/60Hz or pneumatic 6-7 bar


Working Range DN7″ – 16″
175 – 400mm
9″ – 24″
225 – 600mm