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 | 86 WC, 10 Co/4 Cr | 1050 min | 1.0 | Outstanding for abrasive wear. Superior acidic corrosion resistance. |
| RiTech® 25 | 73 WC, 20 Ni/7 Cr | 950-1150 | 1.0 | Excellent corrosion & oxidation resistance. Superior wear resistance. |
| RiTech® 28 | 88 WC + 12 HAST C | 1050 – 1250 | 1.0 | Outstanding corrosion resistance. Excellent sliding wear resistance. |
| RiTech® 31 | 75 Cr3C2, 25 Ni-Cr | 850 min | 1.0 | Outstanding corrosion resistance. Excellent sliding wear resistance. |
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