Valve seat inspection

REVO valve seat measurement

REVO™ valve seat and guide measurement and analysis

The measurement of valve seats and guides has traditionally been very challenging,
involving time-consuming methods that are often a compromise and not capable for
the task.

REVO technology changes this situation dramatically, making it possible to collect
large amounts of data very quickly, from which the analysis parameters for both the
valve seat and the valve guide features can be calculated. The method performs
exceptionally well in repeatability and reproducibility tests.

Data evaluation

The valve seat and guide analysis utility that is embedded in Renishaw's MODUS metrology software is utilised to evaluate the scan data and return data regarding the attributes listed below:-

  • Form error of the valve seat
  • Circularity profile of the seat at any specified height
  • Valve seat width
  • Runout of the seat to the guide bore axis
  • Diameter of the guide
  • Straightness of the guide cylinder
  • Cylindricity of the guide
  • Circularity profile of the guide cylinder at any specified height
  • Form errors of the cones, above and below the valve seat cone

The two types of scanning used to inspect valve seats and guides are...

Helical scans

The measurement process involves two helical scans, one on the valve guide bore and the second over the valve seat area.

On the guide a single helical scan is used with a typical pitch of 0.5 mm, at a scanning speed of 150 mm/s.

Adaptive scanning

This valve seat scan utilises REVO's adaptive scanning capability, which allows a single scan command to cover the areas above and below the critical valve seat surfaces.

On the valve seat a single helical scan is also used, with a typical pitch of 0.1 mm, at a scanning speed of 500 mm/s.



REVO valve seat and stem scanning 

 Part number
MODUS online 
MODUS - touch-trigger (IGES input, STEP input, collision detection, MODUS organiser)A-5639-0001
MODUS - 3-axis scanning (IGES input, STEP input, collision detection, MODUS organiser)A-5639-0003
MODUS - 5-axis scanning (IGES input, STEP input, collision detection, MODUS organiser)A-5639-0005
MODUS offline 
MODUS - touch-trigger offlineA-5639-0101
MODUS - 3-axis scanning offlineA-5639-0103
MODUS - 5-axis scanning offlineA-5639-0105
MODUS options 
MODUS airfoilM-5639-0008
MODUS point cloud sectioning (MPCS)M-5639-0225
MODUS surface textureM-5639-0226
MODUS surface texture advancedM-5639-0227
MODUS gearM-5639-0215
MODUS splineM-5639-0216
MeasureMax clientM-5639-3500
MODUS upgrades 
MODUS touch-trigger to 3-axis scanning upgradeA-5639-5001
MODUS touch-trigger to 5-axis scanning upgradeA-5639-5002
MODUS 3-axis scanning to 5-axis scanning upgradeA-5639-5003
MODUS CAD options 
VDA-FS import / exportM-5639-0010
CATIA V4 importM-5639-0020
CATIA V4 import / exportM-5639-0021
CATIA V5 importM-5639-0022
CATIA V5 import / exportM-5639-0023
CATIA V5 manufacturing option (includes CATIA V5 import)M-5639-0024
Unigraphics importM-5639-0030
Unigraphics manufacturing option (includes Unigraphics import)M-5639-0031
Parasolid import / exportM-5639-0032
Pro/E importM-5639-0040
Pro/E manufacturing option (includes Pro/E import)M-5639-0041
SolidWorks importM-5639-0050
MODUS educational 
Education bundle 1 (5 seats, maintenance contract required)A-5639-0251
Education bundle 2 (10 seats, maintenance contract required)A-5639-0252
Education bundle 3 (20 seats, maintenance contract required)A-5639-0253
MODUS maintenance 
MODUS - touch-triggerM-5639-0501
MODUS - 3-axis scanningM-5639-0503
MODUS - 5-axis scanningM-5639-0505
MODUS - touch-trigger offlineM-5639-0601
MODUS - 3-axis scanning offlineM-5639-0603
MODUS - 5-axis scanning offlineM-5639-0605
MODUS airfoilM-5639-0508
MODUS point cloud sectioning (MPCS)M-5639-0725
MODUS surface textureM-5639-0726
MODUS surface texure advancedM-5639-0727
MODUS gearM-5639-0715
MODUS splineM-5639-0716
VDA-FS import / exportM-5639-0510
CATIA V4 importM-5639-0520
CATIA V4 import / exportM-5639-0521
CATIA V5 importM-5639-0522
CATIA V5 import / exportM-5639-0523
CATIA V5 manufacturing option (includes CATIA V5 import)M-5639-0524
Unigraphics importM-5639-0530
Pro/E manufacturing option (includes Pro/E import)M-5639-0531
Parasolid import / exportM-5639-0532
Pro/E importM-5639-0540
Pro/E manufacturing option (includes Pro/E import)M-5639-0541
SolidWorks importM-5639-0550
Educational bundle 1 annual maintenanceM-5639-0751
Educational bundle 2 annual maintenanceM-5639-0752
Educational bundle 3 annual maintenanceM-5639-0753
APEXBlade (stand-alone licence)A-5639-0220
APEXBlade (add-on to existing MODUS licence)M-5639-0220
APEXBlade maintenanceM-5639-0720
SurfitBlade (stand-alone licence)A-5639-0221
SurfitBlade (add-on to existing MODUS licence)M-5639-0221
SurfitBlade maintenanceM-5639-0721