Membrane pump device

A paint application system comprising:

• a frame element;
• a housing having an outer perimeter defining a housing inner portion, wherein the housing inner portion comprises:
• a first chamber and a second chamber, wherein the first chamber is separated from the second chamber by a movable membrane, while a liquid being pumped can be introduced in the first chamber, and a drive liquid can be introduced into the second chamber, wherein the second chamber has an outlet opening configured to extend through the outer perimeter;
• a piston configured to introduce the drive liquid into the second chamber;
• a drive component configured to drive the piston;
• and
• a collection chamber configured to collect the drive liquid, wherein the collection chamber has an inlet opening;
• an overpressure valve arranged at the outlet opening and configured to close off the second chamber from outside the outer perimeter of the housing, wherein the overpressure valve is configured to release the drive liquid when a pressure within the second chamber exceeds a pressure threshold;
• a pressure hose located outside the outer perimeter of the housing, the pressure hose having a first end and a second end, wherein the first end is connected to the outlet opening;
• a throttle valve located outside the outer perimeter of the housing and downstream of the overpressure valve, the throttle valve configured to reduce a flow rate of the liquid;
• a settling chamber located downstream the throttle valve, the settling chamber configured to receive fluid from the throttle valve and stabilize a pressure the fluid;
• a pressure adjustment valve located outside the outer perimeter of the housing and downstream the settling chamber, the pressure adjustment valve configured to regulate the pressure of the fluid;
• and
• a return hose that connects the pressure adjustment valve to the inlet opening of the collection chamber, wherein the pressure adjustment valve is configured to control a return flow of drive liquid to the collection chamber through the return hose to set a pressure of the drive liquid.