There are countless Olympic medals and countless national champions won through sailing competitions. When vacuum is obtained for resin injection of GRP components for ships, all ships have a shell and inner shell made of glass fiber reinforced plastic, mainly vinyl ester or epoxy resin. In the process of resin injection, H unipolar slide valve vacuum pump can be used to separate the mold because of its strong reliability of vacuum pump. 2H slide valve vacuum pump is widely used in industrial field. In the process of resin infusion, it is important not only that they reach a vacuum level of 0.1 mbar on a continuous basis, which is equivalent to 99.99% of vacuum degree, but also that they can generate enough high pumping speed in vacuum. Even if the synthetic core is sealed with aluminum foil very precisely, the leakage may cause a small amount of air to penetrate, and then it needs to be pumped again immediately with a vacuum pump.

High vacuum performance ensures fast, bubble free and complete resin infusion. The performance of H single pole slide valve vacuum pump can be controlled by throttle valve, for example, if it is necessary to prevent resin flow too fast into the mold. This ensures high quality products and means that the cost of rework is no longer applicable. Their oil sealing function means that the 2H slide valve vacuum pump is not sensitive to the gas generated during the drying process. These are delivered through a vacuum pump without being compressed. A resin trap is connected upstream of each 2H slide valve vacuum pump to prevent resin from entering the vacuum pump.

The slide valve vacuum pump is quite stable in the resin filling industry. In the motor industry, the slide valve vacuum pump can work stably and continuously for three years without installing the front section resin trap.