Pneumatic valve and regulator

A paintball marker assembly comprising:

• a paintball marker;
• a pressurized fluid source;
• a pneumatic regulator assembly comprising:
• a body having a threaded portion including an inlet orifice and forming a connection to the pressurized fluid source, an outlet orifice for connecting to the marker, and a cavity formed therein having a first chamber proximate the outlet orifice, a second chamber proximate the inlet orifice and providing a fluid pathway between the inlet and outlet orifices;
• a poppet valve having one end functionally positioned to extend through the outlet orifice;
• a pneumatic valve actuator positioned within the cavity of the body and supportively coupled to the poppet valve, the pneumatic valve actuator comprising:
• an adjustable air delivery shaft for regulating airflow from the fluid source through the inlet orifice and into the cavity, the shaft comprising a passageway there through having a volume and a nozzle fluidly coupled to the passageway, the nozzle being shaped in a manner which increases the volume of the passageway;
• and
• at least two replaceable assemblies, each having a different predefined pressure threshold, each assembly comprising:
• a reciprocating piston having a polymeric seat at one end configured for blocking the nozzle, the polymeric seat and the nozzle defining a gap there between, the size of which can be altered by moving the adjustable air delivery shaft, and a recess at another end into which a biased end of the poppet valve is positioned, the piston being configured to open and close a passage between the first chamber and the second chamber of the cavity;
• and
• a spring pack comprising a plurality of Belleville springs properly oriented to create a predefined pressure threshold, the spring pack being positioned about the piston and secured thereon to bias the piston to close the passage;
• wherein the at least two replaceable assemblies can be alternately placed in the pneumatic valve actuator to change an output pressure of the regulator, the nozzle and the reciprocating piston are positioned within the cavity outside of the connection to the pressurized fluid source, and a positive pressure differential in the first chamber of the cavity moves the piston to open the passage and block the nozzle.