no its not true more efficiency is good for process and due to more efficiency cycle not became reversible but i think its all depend on all parameters and condition.

i am very thank full to u but plc is costly for this work .i want to complete this work without plc from digital pressure gauge take one connection to...

when compressor suction pressure is goes in vacuum(minus) at that valve operate automatically and suction pressure come in positive for showing the pressure here fitted digit indicator so give me...