Purpose
- machine is designed for lapping (polishing) of the flat sealing surfaces of the gate valve wedges, valve spools, and сhristmas-tree wedges.
Types of machined parts
- wedges of the gate and christmas-tree valves;
- valve (global valve) spools;
- end-seal rings of the pumps;
- other flat-surface parts.
Lapping-plate diameter
- Ø 1250 mm (49″). 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.
|
Parameter |
SP-1200 |
|
Nominal diameter of the valve, DN, mm (″) |
50…600 (2...24) |
|
Lapping-plate diameter, mm (″) |
1250 (49) |
|
Number of cartridges |
3/1 |
|
Internal diameter of the cartridges, mm (″) |
550/830 (22/33) |
|
Machined-surface roughness, μm |
0,08…0,1 |
|
Machined-surface nonflatness (accuracy), mkm |
0,6 |
|
Lapping-plate speed, rpm |
5…40 |
|
Installed power, kW |
8 |
|
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) |
|
Weight, kg |
2100 |
Advantages
- Each point of the lapped surface of the parts makes complex plane-parallel motion on the lapping-plate surface.
- The machines are 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 machines are equipped with the smooth start device with the lapping-plate speed adjustment.
- The machines are designed so that the lapping disc can be adjusted during its operation.
