| 代号 | API 代号 |
| C14-15(XX) | C14-15 |
| C14-20-125(XX) | C14-20-125 |
| C14-20(XX) | C14-20 |
| C14-25(XX) | C14-25 |
| C14-30(XX) | C14-30 |
| C14-40(XX) | — |
注:①XX为材料标识代号;
②球腔导向,减少阀球飘忽量,使阀球快速回落;
③可适用于斜度井。
| 代号 | API 代号 |
| C14-15(XX) | C14-15 |
| C14-20-125(XX) | C14-20-125 |
| C14-20(XX) | C14-20 |
| C14-25(XX) | C14-25 |
| C14-30(XX) | C14-30 |
| C14-40(XX) | — |
注:①XX为材料标识代号;
②球腔导向,减少阀球飘忽量,使阀球快速回落;
③可适用于斜度井。