399 Double Unit

The pneumatic double unit consists of an air regulating valve and a filter. Some brands of solenoid valves and cylinders can run without oil (lubricated by grease), so no lubricator is needed. Combining the air filter and the pressure reducing valve is called a pneumatic double unit; the carbon steel air source double unit serves to reduce the structure, save installation space, and offer convenient installation, maintenance, and centralized management.

The working principle of the triplet nozzle is: compressed air is first sent to the air filter, purified, then sent to the pressure reducing valve, where the pressure is regulated after reduction to meet the required pressure.

The working principle of the air filter combination triplet unit is: compressed air is sent to the air filter, regulated by pressure reduction, and then discharged through the exhaust port. It is generally used in unlubricated pneumatic systems.

Apart from differences in composition, their functions, operating environments, and service lives also differ greatly. In some occasions oil mist is not allowed, but the triplet oil can lubricate parts that are inconvenient to oil, thereby greatly improving the engine's service life.