CheckPoint's Series HDA chemical injection pump features a "sandwich" diaphragm set consisting of three stainless steel disks constrained between the pump's chemical head and hydraulic body. The disks can flex quite easily due to their thickness, ensuring a minimal chance of failure. In the event that one of the diaphragms does fail, the pump will continue to operate without cross-contamination between the hydraulic oil and the chemical. The pump's hydraulic plunger and bushing are constructed of strong ceramic materials, guaranteeing long life, low wear, and repeatable, consistent chemical injection throughout the lifetime of the pump. The Series HDA pump head has several safety and indication features, and its diaphragm rupture detection system provides multiple options for indicating, including a popup tattletale, gauge, or electrical signal. It also incorporates a pressure-limiting internal relief valve with a tattletale indicator, which allows the user to see if an event has occurred.
