Industrial Ceramic Elements Of Shutoff And Control Valves, high-strength,resistant to corrosion and wear

The process equipment involved in the pumping and transport systems for liquid and gaseous media contains a significant number of shut-off and control valves. Elements of valves and fittings directly overlapping the flow are subject to a destructive effect of the flow, in the case of abrasive particles, corrosive media, high temperatures and cavitation leads to a drastic reduction in the resource and the need for frequent replacement of reinforcing units. The use of high-strength ceramic materials, resistant to corrosion and wear, allows increasing the life of equipment many times.

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The scope of ceramic elements is quite wide:

• ball valves;
• throttle pairs;
• disc valve;
• fitting;
• gate valves;
• valve pairs (ball-saddle).

Experience in the use of ceramic elements shows a significant reduction in the effect of “grasping” the elements of construction, reducing the opening/closing forces of the reinforcement, increasing the temperature range of operation and the overall increase in reliability and longevity of the unit. Silicon carbide, aluminum oxide, cemented carbide, zirconium dioxide, silicon nitride are used for the production of shut-off and control valves.

At present, wear-resistant parts made of ceramic materials, cemented and graphite are an integral part of pumps, compressors, turbines and pipeline fittings.

Main applications:

• installations of the electric centrifugal pumps;
• pipeline accessories;
• rod deep pum;
• pumps to maintain pattern pressur;
• rotary-plate vacuum pumps;
• sealed pum;
• plunger pumps;
• slurry and mud pumps;
• main line and supporting pum;
• power and feed pumps;
• various compressors and turbines.

Advantage of ceramic materials:

• excellent wear resistance;
• excellent corrosion resistance;
• excellent coefficient of friction;
• high thermal conductivity (heat removal from the friction zone, reduction of the temperature gradient and, accordingly, temperature stresses and deformations);
• high modulus of elasticity (resistance to force deformations);
• low temperature coefficient of linear expansion;
• manufacturability (the possibility of providing a high quality surface treatment).

Materials:

• aluminum oxide (corundum, alundum);
• silicon carbide;
• zirconia;
• cemented carbide;
• graphite and impregnated graphite.