Integrated dot pressure protection valve

A method of assembling a pressure protection valve comprising the steps of:

• forming a valve body defining a central bore and having a plurality of integrated fluid connections, the valve body being made of a first material;
• inserting a spring into the central bore through a first one of the plurality of integrated fluid connections;
• inserting a valve stem into the central bore through the first one of the plurality of integrated fluid connections;
• forming a valve base made of a second material different from the first material;
• and
• after inserting the valve stem into the central bore through the first one of the plurality of integrated fluid connections, connecting the valve base to the valve body at the first one of the plurality of integrated fluid connections, the spring biasing the valve stem toward the valve base;
• wherein during valve operation the valve stem is moveable within the central bore of the valve body between an open position that permits fluid flow from the valve base through at least one additional fluid connection of the plurality of integrated fluid connections and a closed position that blocks fluid flow from the valve base through the at least one additional fluid connection of the plurality of integrated fluid connections, the valve base having a valve seat that receives a sealing end of the valve stem when the valve stem is in the closed position;
• wherein during a pressure drop below a threshold pressure, the spring bias moves the valve stem to the closed position to maintain pressure at the first one of the plurality of integrated fluid connections;
• wherein a diameter of the central bore is equal to a diameter of an internal side surface of the valve seat;
• and
• capping the valve body with a retaining sleeve opposite from the valve base;
• wherein the step of inserting a valve stem into the central bore and the step of capping the valve body with the retaining sleeve provides for spring compression to define the threshold pressure.