Dear heroes, both M4 and M7 are load-sensitive multi-way valves. They must be used in conjunction with a load-sensitive pump (i.e., a constant flow variable pump), that is, the maximum load pressure is fed back to the variable through the LS pipeline. Pump, so that the variable pump provides the flow required for the movement of each actuator. What's the difference between the two? Which one is more energy-saving and cost-effective? .