Gear pump wear repair method

Stainless steel gear pump can transport corrosive lubricating medium, regardless of the medium viscosity can be used in different industries, give full play to the role and value of the industry, but there will be some wear and tear in use, The wear parts of the gear are mainly the meshing of the teeth, the involute face and the two ends of the gear. Slight wear, the tooth surface can be whetstone grinding, both ends of the flat grinding on the flat light. Serious wear gear teeth should be replaced with new gear, if only the ends of the gear wear, grinding grinding in the surface grinder . Stainless steel gear pump wear mainly in the following main aspects.
Stainless steel gear pump shaft wear is mainly due to friction between the ends of the shaft and the support needle roller wear, so that smaller shaft diameter. If it is slightly worn, the shaft can be enlarged by plating a hard chrome to make the shaft repaired. If the shaft wear serious, 45 steel or 40Cr steel should be re-manufactured, shaft rough rough, fine car, the bearing parts to be heat treated, the hardness of HRC60-65, and then grinding, the bearing surface roughness Ra with parts Greater than 0.32μm; shaft roundness and cylindrical tolerance of 0.005mm; with the gear with the H7 / h6, the surface roughness Ra should not exceed 0.63μm.
Stainless steel gear pump body surface wear is mainly suction section arc-shaped face. If there is slight wear, use whetstone grinding to deburring use. The pump body is made of cast iron casting blank, severe wear and tear should be replaced when the new pieces. Stainless steel gear pump end caps made of cast iron, wear phenomenon, the slight flat grinding on the flattening, wear more serious grind on a flat grinder. Grinding the end cap and the pump body with the connection plane contact should not be less than 85% flatness tolerance, the end face of the hole centerline vertical tolerance, the two ends of the parallelism allowance and the two axis hole centerline The parallel tolerance are O.Olmm. After grinding the surface roughness Ra should not exceed 1.25μm. If both ends of the gear in the pump are repaired by grinding, the width of the pump body should also be changed to the same size as the sharpened ends of the gear. Both sides of the re-machined pump body should meet the standard technical requirements.
Stainless steel gear pump parts repair, the needle roller bearings should be replaced. Needle on the needle is: the size of the needle roller diameter error should not exceed 0.003mm, the length tolerance of 0.1mm, and the shaft with the gap should be around O.Olmm; needle roller assembly according to the number of requirements filled bearing shell, Needle roller to be arranged parallel to each other.
Stainless steel gear pump after a certain wear and tear to conduct a good inspection and maintenance, in accordance with certain methods and principles of maintenance and repair, timely layout and settings.

Butterfly Valve is from a family of quarter-turn valves. Butterfly valve is typically used to regulate a fluid flowing through a section of pipe. A flat circular plate is positioned in the center of the pipe. The plate has a shaft through it connected to an actuator on the outside of the valve. Rotating the actuator turns the plate either parallel or perpendicular to the flow. Unlike a Ball Valve, the plate is always present within the flow, therefore a pressure drop is always induced in the flow regardless of valve position.

Wafer Butterfly Valve	High Performance Butterfly Valve	Pneumatic Butterfly Valve

There are different kinds of butterfly valves, each adapted for different pressures and different usage.

The resilient butterfly valve, which uses the flexibility of rubber, has the lowest pressure rating.

The high performance butterfly valve, used in slightly higher-pressure systems, features a slight offset in the way the disc is positioned, which increases the valve's sealing ability and decreases its tendency to wear.

The valve best suited for high-pressure systems is the Triple Eccentric Butterfly Valve, which makes use of a metal seat, and is therefore able to withstand a greater amount of pressure.

Butterfly valves are relatively easy to maintain. The resilient seat is held in place by mechanical means, and neither bonding nor cementing is necessary, Because the seat is replaceable, the valve seat does not require lapping, grinding, or machine work.

Butterfly valve is also a type of flow control device, used to make regulating fluid flowing through a section of pipe.

Butterfly Valve

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