ABSTRACT
While selecting an injection pump, one must consider the parts that will be in direct contact with the chemical substances. These parts must be of stainless steel or of a material that is corrosion resistant. The injection method consists of basic components such as pump, pressure regulator, gate valve, pressure gauge, connecting tubes, check valve, and chemigation tank. The injection pump should be precise, easy to adjust for different degrees of injection, corrosion resistant, durable, and rechargeable, with the availability of spare parts. The recommended materials are stainless steel, resistant plastic, rubber, and aluminum. Bronze, iron, and copper are nonacceptable materials. The injection pump must provide a pressure on the dis-
charge line greater than the irrigation pump. Therefore, the operating pressure of the irrigation system exerts a minimum effect in the endurance of the injection pump.
