Ball valve and ball valve module having the same

A ball valve comprising:

• an actuator;
• a housing comprising an inner space and a plurality of through holes to expose the inner space, the through holes comprising an inflow hole through which a refrigerant is configured to flow in, an outflow hole through which the refrigerant is configured to flow out, and a connection hole to which the actuator is connected, wherein the outflow hole comprises a first outflow hole and a second outflow hole different in size from the first outflow hole;
• a ball comprising a channel through which the refrigerant is configured to flow in connection with the inflow hole and the outflow hole, and configured to rotate in the inner space by a rotary shaft of the actuator;
• a seat comprising a flow hole to communicate with the outflow hole and allow the refrigerant to pass therethrough, and placed between the housing and the ball to be in contact with the ball and support the ball;
• a cap detachably mounted to the housing in the second outflow hole;
• and
• a pair of sealing members, wherein one of the pair of sealing members is placed between the seat and the housing in the first outflow hole, and the other of the pair of sealing members is placed between the seat and the cap in the second outflow hole,
• wherein the cap comprises an accommodating hole in a center thereof to expose the flow hole of the seat, and
• wherein the sealing member placed between the seat and the cap in the second outflow hole is configured to protrude outward further than an outer surface of the cap through the accommodating hole.