Stroke Adjuster locks in place with a simple thumbscrew
Stroke Adjuster scale easier to read and set than previous diaphragm pump models
Check Valves for 316SS models have TFE soft seats with 316SS balls. (LD200 & 400)
Check Valves for TFE models have TFE soft seats with Zirconium balls. (LD200 & 400)
Check Valves on LD100 models are Kynar with Kynar soft seats and Zirconium or Ruby Sapphire balls
LD Low Pressure Diaphragm
Operation
POWER STROKE As the air or gas enters the MOTOR CHAMBER from the controller, the DIAPHRAGM is driven into the fluid cavity of the FACEPLATE, displacing the fluid in the FACEPLATE and extending the RETURN SPRING. As the fluid is displaced, the rise in pressure closes the SUCTION CHECK VALVE and opens the DISCHARGE CHECK VALVE. A precise amount of fluid corresponding to the stroke of the DIAPHRAGM is discharged.
SUCTION STROKE When the air or gas pressure is exhausted from the MOTOR CHAMBER, the RETURN SPRING assists the DIAPHRAGM in returning to its static position.The retraction of the DIAPHRAGM reduces the pressure in the fluid cavity, thus closing the DISCHARGE CHECK VALVE and opening the SUCTION CHECK VALVE. The fluid cavity is again filled, preparing the pump for another power stroke.
