RiTech
Robotically Integrated Technology for High-Performance Valves
HVOF RiTech® , or Robotically Integrated Technology, is a proprietary compressive spray technique developed by ValvTechnologies to improve product performance. This proprietary process allows for exceptional quality control and higher bond strengths.
ValvTechnologies’ HVOF RiTech® is a high velocity oxygen fuel coating process, with properties of high density and negligible porosity. A hot, high velocity gas jet sprays a coating of molten particles onto the ball and seat surfaces. An oxygen fuel mixture is forced through a spray gun nozzle and ignited. A mixture of powered materials (tungsten, carbide, nickel, chromium, etc.) are also forced through the spray gun nozzle. The ignited gas forms a circular flame surrounding the powder as it flows from the nozzle for uniform heating, melting and acceleration (5000-6000°F at >7000 fps).
- Improved quality
- Abrasion/corrosion protection
- Improved wear resistance
- Improved performance
- Ability for components to operate in higher and/or lower temperatures
- Ability to operate in the most severe service applications
- Improve efficiency
| Grade designation | Composition (% by weight) | Hardness HV300 | Porosity (Max Vol %) | Comparative Attributes |
| RiTech® 21 | WC, Co, Cr | 1050 min | 1 | Outstanding for abrasive wear. Superior acidic corrosion resistance. |
| RiTech® 25 | WC, Ni, Cr | 950-1150 | 1 | Excellent corrosion & oxidation resistance. Superior wear resistance. |
| RiTech® 28 | WC, HAST C | 1050 – 1250 | 1 | Outstanding corrosion resistance. Excellent sliding wear resistance. |
| RiTech® 31 | WC, Ni, Cr | 850 min | 1 | Outstanding corrosion resistance. Excellent sliding wear resistance. |
| RiTech® 49 | WC, Cr, C, Ni | 1000 min | 1 | Outstanding abrasive and superior corrosion resistance up to 900F. |
| RiTech® 50 | WC, Ni, B, C | 1000 min | 1 | Outstanding abrasive resistance up to 900F. |
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