Pistons

By using piston core which is produced via 40Cr forging, the piston rubber which has good resistance to heat,oil and water via specific nitrile rubber and the cloth-insulated rubber at the root, the piston can have hightensile strength, good wear resistance and long service life. The assembled type rubber piston has singleacting and double-acting types, uses high-quality synthetic rubber in piston rubber and reaches the same levelof service life of similar product in foreign countries; its appearance size conforms to API stan- dard and can betotally exchanged with the original parts.

活塞芯采用40Cr锻造加工而成，活塞胶皮采用特制的丁腈橡胶，耐热、耐油、耐水，根部采用夹布橡胶加强，具有很高的抗拉强度、抗磨损性能，使用寿命长。组装式胶活塞有单作用和双作用两种类型。活塞胶皮采用优质合成橡胶，使用寿命达到国外同类产品水平。外形尺寸符合API标准，与原厂配件可完全互换。