Carilo has recently signed the contract with its Venezuelan end user for 8 sets of metal seated ball valves (36 inches 150 pounds), which will be applied for special service. The engineering solution is achieved together according to the working conditions provided by customer. The body material is A216 WCB with epoxy coated both on outside and inside. The ball material is A182 F316 spray coated with TCC. The media of this pipe is industrial production stream line containing solid particle. If soft seated ball valve is applied, its life span will only last for 3 days or even several hours. The engineers in Carilo proposed that spray coated metal seated ball valves whose life span can last 100 thousand times open and shut should be applied. After several discussions and technical communicattions, as well as providing sample valves to practice in the pipeline, the exciting moment has finally come— Carilo is awarded this job! Carilo has recently signed the contract with its Venezuelan end user for 8 sets of metal seated ball valves (36 inches 150 pounds), which will be applied for special service. The engineering solution is achieved together according to the working conditions provided by customer. The body material is A216 WCB with epoxy coated both on outside and inside. The ball material is A182 F316 spray coated with TCC. The media of this pipe is industrial production stream line containing solid particle. If soft seated ball valve is applied, its life span will only last for 3 days or even several hours. The engineers in Carilo proposed that spray coated metal seated ball valves whose life span can last 100 thousand times open and shut should be applied. After several discussions and technical communications, as well as providing sample valves to practice in the pipeline, the exciting moment has finally come— Carilo is awarded this job!
1. Coating process shall be HVOF
2. The thickness of coating after final grinding and polishing shall be minimum 200~ 400 micron.
3. The two seats shall be lapped with corresponding ball surface to assure full tightness.
4. 100% of sealing area to be dye penetrates examined.
5. Acceptable criteria: No visible defects
6. Typical composition: 86%Wc – 10%Co – 4%Cr (tungsten carbide e – cobalt- chromium)
7. Typical hardness 1050 HV
8. Tensile bound strength>10.000 Psi
9. For more detail see APENDIX D

10. Operating temperature is +200°C-350°C and sealing shall be flexible graphite.