Valve ball and seat is one of key parts of subsurface sucker rod pump. Its performance directly affects the use effect and service life of sucker rod pump. Good quality will increase the oil production and reduce maintain times of pump to improve the oil well’s economic benefit.The ball and seat are

The company's Central American customers ordered a batch of valve ball seats, of which the valve ball is made of silicon nitride (C2), which has the characteristics of high hardness, good wear resistance and corrosion resistance, and has been purchased by the company's customers for many times. The