The pilot operated checkvalve provided in simscape fluids is operated by pressure at A or pilot pressure X or both, I wish to open the checkvalve only by pilot pressure . can anyone say is there anything I can do?
The pilot in this case is acting in the opposite direction as in the "Pilot-Operated Check Valve (IL)" block. It's equivalent to having a negative pilot ratio, but it won't allow you to set a negative value in the block.
Anyway, I think your best bet is to use a "Cartridge Valve Actuator (IL)" and a "Orifice (IL)" block.