Model M-100 Portable Valve Grinder

2.M-100 Valve Grinder Technical Parameter
Grinding scope:
Cone valve: Φ10~65,angle 60°,75°,90°
Flat cone-valve: Φ20-165
Gate valve: Φ30-100(not on line)
Motor power: 622W
Rated Voltages: 220V
Allowed adjustable length: L≤250mm
Operating weight: 3kg

3.M-100 Valve Grinder Part list and installation pictures
The said grinder is composed of motors,hand-lift set,driving shafts,fixed set, lapping head, papei-pressure, gasket, nut and so on. 
The following pictures separately expressed installation for various valves.

4.M-100 Valve Grinder Getting started and safety instructions
4.1 Switch in 220V, single phase AC power, whose socket should be in compliance with the plug of the motors.
4.2 The motors shall be used in the following way:
The rev speed shall be increasingly fast when the button is pressed more and more heavily.
The motor shall turn clockwise or counter-clockwise following the relevant switch, the rev speed could also be adjusted by the turn knob, which shall be idle when perpendicular with the motor spindle line.
The rev speeds up when the speed handwheel, beside the switch, is turned clockwise per the arrow direction imprinted on the wheel, vice versa. 
In general, the motor is recommended to start up after the handwheel is turned to the lowest position, then, on pressing the control button (viz. lock button,  is located on the rear hand grip of the motor)the motor shall continue to run by itself, the expected rev can be attained finally by the use of the handwheel. When switching off, the lock button will be released automatically on pressing the switch after the rev is on the lower side, the motor shall stop after the switch is released.
4.3Cut the grinding paper ( cloth) in conformity with the diameter of grinding films or the length of conical surface.
4.4Prior to grinding, check the surface to be grinded to remove the highlights, in order that neither grinding head shall be bumped nor the grinding angle will be altered.
4.5Disconnect the plug from the power source after the grinder switches off in order to avoid the accidental starting and personal or grinder injury.

 
5.M-100 Valve Grinder Installation& Operation Method
5.1 lapping head Selection
Choose the Corresponding lapping head According to the sizes of valve core .
Survey the angle of lapping head with the angle ruler, Guaranteeing that the angle match to the cone valve.
5.2 Installation    
Installing the equipment according to the size of the valve(picture1 to picture 10).
5.3 Operation Method
Set the fixed set on the valve pipeline,stick the lapping head onto the lapped surface,one hand holding the motor handle and switch,the other holding the hand-lift set,press the switch gently,then it is grinding.

 6.M-100 Valve Grinder Grinding Process
6.1 Rough Grinding
Grind with grinding paper (cloth) 80# .
6.2 Precision Grinding
Grind with grinding paper(cloth) 240# .
6.3 Polish Grinding
Grind with grinding paper(cloth) above 400#,or grind with fine lapping plaster on lapping head.

7.M-100 Valve Grinder Maintenance  
When the grinding is over, carefully clean all parts, remove the grinding paper (cloth) and applied with oil .
store it in the tool box according to the angle and size. 

M-100 Portable valve grinder User's Manual