Valve Refacing
 
 

Comec RV 516 - Precision Valve Refacer

GREATEST PRECISION
On this machine, valves are not centerlined by any collet, but by means driving rollers; the same system used on centeriess grinding. One rest supports the stem of the valve maintaining it exactly in position.

GREATEST WORKING SPEED
Through an automatic device it is possible to insert and to remove the valve form the rest and driving rollers with no need to switch off the machine, so reducing the machining time.

SPECIAL DEVICE
By a setting micrometric device can be obtained the dressing of the wheel, and the grinding of the head of the valve.

Variable valve speed device (VGV516) to adjust surface speed for different diameter valves for best surface finish for a wide range of valve head diameter.
Technical Characteristics  
Diameter of valve stem 5-16 mm
Grinding wheel diameter 215 mm
Grinding wheel speed 2800 RPM
Installed horsepower 1 HP
Height 700 mm
Width 600 mm
Length 700 mm
Weight 150 kg


RV5500 - PEG Valve Refacer for Very Large Valves

Technical Characteristics  
Max Valve stem diameter 40 mm
Minimum valve head diameter at 45° with steady rest 15 mm
Minimum valve head diameter at 45° 200 mm
Minimum valve head diameter at 30° 200 mm
Grinding wheel motor stroke 95 mm
Graduated quadrant stroke 150 mm
Minimum length with steady rest 45° 180 mm
Minimum length without steady rest 45° 95mm (Valve head diameter 30mm)
Minimum length with steady rest 30° 230 mm
Minimum length without steady rest 30° 120mm (Valve head diameter 45mm)
Grinding angle 20°÷ 60°