Design Feature 1，standard：API 16A 2，Bore Dia.: 7 1/16”(180mm)—21 1/4”(540mm) 3，Pressure: 3000 Psi (500mpa)—5000psi (35mpa). SPECIFICATIONS-MODEL FH ANNULAR BOP Model FH28-21 FH35-21 FH18-35 FH28-35 FH35-35 ...Read More