... 6A. Gate valves manufactured by our company are available in pressure ratings from 2000psi, 3000psi, 5000psi, 10000psi and 15000psi, material ... seat still keep a positive metal to metal sealing under low pressure.The hand wheel shall be backed off 1/4 ... are available in 2000psi, 3000psi, 5000psi, 10000psi and 15000psi working pressure, material classes from AA through FF, product specification levels ( ...