Fluid transfer system having transfer device and dry break coupler

A fluid transfer system comprising:

• a coupler including a coupler housing defining a coupler inlet and a coupler outlet, a coupler valve disposed in said coupler housing being moveable between an open-coupler valve position and a closed-coupler valve position, and a coupler spring continuously biasing said coupler valve in said closed-coupler valve position;
• a transfer device including a housing defining an inlet and an outlet, an actuator having a grasping portion moveable fore and aft, said actuator moveable between a first position and a second position relative to said housing, and a valve assembly disposed in said housing and operatively coupled to said actuator, said valve assembly including a main valve moveable between a closed-main valve position and an open-main valve position in response to movement of said actuator and a pilot valve moveable between a closed-pilot valve position and an open-pilot valve position in response to movement of said actuator wherein said main valve is in said closed-main valve position and said pilot valve is in said closed-pilot valve position when said actuator is in said first position;
• and
• wherein a configuration of said coupler and said transfer device being coupled together, said coupler valve being in said closed-coupler valve position and said main valve being in said closed-main valve position, a space between a face of said main valve and a coupler valve face of said coupler valve is an axial distance less than an axial thickness of said coupler valve face due to a proximity of said main valve to said outlet and a proximity of said coupler valve to said coupler inlet to reduce fluid emissions upon uncoupling said transfer device from said coupler.

A fluid transfer system comprising:

• a coupler defining a coupler bore, a coupler inlet, and a coupler outlet, a coupler valve disposed in said coupler bore being moveable between an open-coupler valve position and a closed-coupler valve position, a coupler seal disposed on said coupler valve to prevent fluid from leaking out of said coupler when said coupler valve is in said closed-coupler valve position, a coupler spring continuously biasing said coupler valve in said closed-coupler valve position, and a threaded portion adjacent said coupler inlet;
• a transfer device including a housing defining an inlet and an outlet, an actuator having a grasping portion moveable fore and aft, said actuator moveable between a first position and a second position relative to said housing, and a valve assembly disposed in said housing and operatively coupled to said actuator, said valve assembly including a main valve moveable between a closed-main valve position and an open-main valve position in response to movement of said actuator and a pilot valve moveable between a closed-pilot valve position and an open-pilot valve position in response to movement of said actuator wherein said main valve is in said closed-main valve position and said pilot valve is in said closed-pilot valve position when said actuator is in said first position, and a collar being coupled to said housing and rotatable relative to said housing, said collar including threads;
• and
• wherein said threads of said collar threadably engages said threaded portion of said coupler in a configuration of said coupler and said transfer device being coupled together and said coupler valve being in said closed-coupler valve position and said main valve being in said closed-main valve position, wherein said coupler valve extends through said coupler outlet an axial distance to form a space between a face of said main valve and a face of said coupler valve that is less than the axial distance due to a proximity of said main valve to said outlet and a proximity of said coupler valve to said coupler inlet to reduce fluid emissions upon uncoupling said transfer device from said coupler.