What does the seal form C2A1A mean?
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What does the sealing form C2A1A in the table mean?
C2 stands for Class 2 seal, API610 pump； A1 represents the arrangement (single end seal), A represents the spring push type
Type 1 seals are ANSI pumps, and Type 3 seals are also API610 pumps, but the requirements are very strict.
Arrangement A1 single end face is 1CW-FX, 1CW-FL
Arrangement A2 double-end seal, the pressure inside the seal is lower than the seal chamber pressure, like the 11+52 scheme, 2CW-CW, 2CW-CS, 2NC-CS
Arrangement A3 double-end seal, the pressure inside the seal is higher than the seal chamber pressure, like the 11+53A scheme, 3CW-FB, 3CW-BB, 3CW-FF, 3NC-BB, 3NC-FF, 3NC-FB
Sealing form and spring position, A spring push type, B metal bellows seal with O-ring, C metal bellows seal with flexible graphite
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