Compared with P series, L series has two advantages:

1. With the help of the big vacuum condenser with a surface for heat losing high to 4 m2, the new type improve the cooling speed by 15-25%. And 80 degree centigrade high temperature demoulding cut down the steam consumption. Vacuum condenser low the steam temperature, make the vacuum pump running in common temperature, and lengthen its life.

2. The new cooling system has quantity fixed pressurized water tank. When use water cooling, the system can use compressed air to heighten the cooling water pressure. It solves the problem that low cooling water pressure makes the cooling speed too low, and make sure the machine has a steady cooling time. So the uses will have more choice to pump, and the advantage will be more obviously in the case of many machinery run at the same time or the water pressure is too low.