Valve seat grinder is a specialized precision repair equipment used for repairing the sealing performance of valve sealing pairs on site or in the workshop. It drives a specific shaped grinding head (or tool) to perform precise cutting and grinding on the sealing surface of the valve seat, eliminating scratches, pits, and unevenness caused by erosion, wear, and corrosion, restoring a tight fit with the valve disc (or spool), thereby achieving zero leakage sealing of the valve. This equipment is a key tool for preventive maintenance and repair of valves in industries such as power, petrochemicals, water treatment, and ships.

Core working principle

The core of a valve seat grinder is centering and precision grinding. The equipment ensures that the rotation center of the grinding head is completely aligned with the centerline of the valve seat through a guide shaft or centering fixture. Then, the motor drives the grinding head (whose working surface is in contact with the conical surface of the valve seat) to rotate at high speed, and at the same time, with the assistance of grinding agents (such as diamond grinding paste, sandpaper, or specialized grinding wheels), performs micro cutting on the sealing surface of the valve seat. By gradually replacing grinding tools with different particle sizes (from coarse to fine), the sealing surface of the valve seat is ultimately achieved with the required mirror finish and geometric accuracy

The valve seat grinder is a professional “surgical knife” for maintaining the “heart health” of industrial fluid systems. It has transformed the traditional “replacement” maintenance mode into an advanced “repair” mode with its professionalism, economy, and efficiency, bringing significant economic benefits and production guarantees to users. For any industrial field that relies on reliable valve operation, having a valve seat grinder is a wise investment to ensure continuous production and reduce maintenance costs.

Technical performance and feature

◆It is suitable to lap seating surface for various valves;

◆It adopts claw hold flange to press mounting, work table mounting surface can adjust inclination angle(0~6°);The speed of lapping table is steplessly controlled. A eccentric mechanism is used to make lapping table eccentricrotation;

◆Seating surface roughness reaches Ra 0.8μm and tightness> 80 %;

◆Up & down of an arm, inclination of work table as well as loosening & tightening and tightening force all aresteplessly hydraulic driven;

◆Equipped automatic oil pressure discharge system, when being ready state, system discharge automatically, whenworking, system return to normal status to effectively reduce oil temperature, elongate life of the test bench andsave energy;

◆Lapping time can be pre-set, when timer is over, lapping stop automatically with sound & light;

◆Easy, simple and reliable operation. A person can operate several lapping machines with high efficiency.

Main technical parameters and sizes