... Product specification level PSL1~PSL3 Material level EE,FF Choke manifold Choke manifold is necessary to control well-kick & blowout and ... hydraulic control console for remote control,The manifold is matched with barrel choke valve that is required to be orifice ... choke valve in case of stop function being required. ... &16AMaterial classAA,BB,CC,DD,EE,FF API Choke Manifold