Portable machine for grinding and lapping of stop valves (plug valves)


  • portable device is designed for grinding and lapping the sealing surfaces of the plug valve trim without their dismantling from the pipeline.

Dn of valve

  • 32...200 mm (1 1/4...8″).

Complete set

  • portable unit (А); 
  • professional pneumatic (Atlas Copco) (B1) and/or electric (Bosch) (B2) drives;* 
  • stand for spool machining (С); 
  • multi-function installation device (D); 
  • replaceable grinding and lapping discs; 
  • a set of self-adhesive grinding rings; 
  • air preparation unit with a sleeve for compressed air supply; 
  • plastic case; 
  • a set of spare parts, tools and accessories. 

* Upon customer request. 

Machined-surface types

  • sealing surfaces of the PSV and plug valve trim and spools.



Usable range, DN, mm (″)

32…200 (1 1/4...8)

Electric drive:

- power consumption, kW;


- supply voltage, V.

220 (110*)

Pneumatic drive:


- power, kW;


- air flow rate, m³/min (gl/min);

1,6 (423)

- compressed-air working pressure, bar (psi).

6,3 (91)

Maximum immersion depth into the valve housing, mm (″)

200 (8)

Weight, kg:

- the heaviest mounted assembly;


- set (with pneumatic and electric drive).



  • Grinding and lapping of the sealing surfaces of the trim directly in the pipeline without cutting out the valves from the pipeline. 
  • The quality is achieved due to design of the working head and the mandrel, which generate complex plane parallel motion of the tool across the processed surface. 
  • Small weight of the unit makes it convenient for use at hard-to-reach locations. 
  • The set includes the wedge processing unit, replaceable discs for grinding and lapping, and a tool storage box.