Flat lapping (polishing) machine

Purpose

• machine is designed for lapping (polishing) of the flat sealing surfaces of the gate valve wedges, valve spools, and сhristmas-tree wedges; 
• special-configuration SP-600 is used for lapping the end-seal rings.

Dn of valve

• SP-1200: Ø 1250 mm (40″). 
Approximately, DN 50…600 mm (2...24″) for the wedges of the gate valves, and DN 40…200 mm (2...8″) for the spools of the valves. 
• SP-600: Ø 620 mm (24″). For the wedges of the gate valves DN 50…150 mm (2...6″).

Complete set

• wedges of the gate and christmas-tree valves; 
• valve (global valve) spools; 
• end-seal rings of the pumps; 
• other flat-surface parts.

Parameter

SP-1200

SP-600

Nominal diameter of the valve, DN, mm (″)

50…600 (2...24)

15...150**/50...150** (½...6**/2...6)

Lapping-plate diameter, mm (″)

1250 (49)

620 (24)

Number of cartridges

3/1

3

Internal diameter of the cartridges, mm (″)

550/830 (22/33)

266 (10)

Machined-surface roughness, μm

0,08...0,1

0,08...0,1

Machined-surface nonflatness (accuracy), mm (″)

0,0006 (0,00024)

0,0006 (0,00024)

Lapping-plate speed, rpm

10…40

10...50

Installed power, kW

8

4

Electric power supply, V/Hz

400/50 (480/60)

Working pressure of network air, bar (psi)

6,3 (91)

-

Overall dimensions (LхWхH), mm (″)

1976х1645х1325 (78x65x52)

1160х916х990 (46x38x41)

Weight, kg

1410

625

     
 * Upon customer request.
** Valve spools.
   

Advantages

  • Each point of the lapped surface of the parts makes complex plane-parallel motion on the lapping-plate surface. 
  • The machine is equipped with the polishing-compound supply device. 
  • The spent compound is collected in a special tank. 
  • The lapping time is automatically controlled by the timer.
  • The machine is equipped with the smooth start device with the lapping-plate speed adjustment. 
  • The machine is designed so that the lapping disc can be adjusted during its operation.

Video