Refrigeration valve block

A service valve assembly for a refrigeration system that includes a condenser unit and an evaporation unit, comprising:

• a housing having a passageway, a condenser side port in communication with the passageway for connection to the condenser unit, an evaporation side port in communication with the passageway for connection to the evaporation unit, and a service port in communication with the passageway;
• a valve unit disposed within the passageway of the housing, the valve unit including a shut-off ball valve and a control valve,
• the shut-off ball valve controls flow through the housing and is rotatable into a first position that permits flow communication between the condenser side port and the service port through the shut-off ball valve, a second position that prevents flow communication between the condenser side port and the evaporation side port and the service port but permits flow communication between the evaporation side port and the service port through the shut-off ball valve, and a third position that permits flow communication between the condenser side port and the evaporation side port through the shut-off ball valve, and
• the control valve controls flow through the service port and has a first position preventing flow past the control valve and thereby preventing flow through the service port, and a second position that permits flow past the control valve and thereby permits flow through the service port.

A service valve assembly for a refrigeration system that includes a condenser unit and an evaporation unit, comprising:

• a housing having a passageway, a condenser side tube in communication with the passageway for connection to the condenser unit, an evaporation side tube in communication with the passageway for connection to the evaporation unit, and a service port in communication with the passageway;
• the evaporation side tube has a first end that is fixed to the housing and a second end opposite the first end, the second end being closed, and the evaporation side tube is formed with at least one step;
• a valve unit disposed within the passageway of the housing, the valve unit including a shut-off ball valve and a control valve;
• the shut-off ball valve is rotatably disposed within the housing, the shut-off ball valve includes at least two separate flow paths that are not in fluid communication with one another, and the shut-off ball valve is rotatable into first, second and third positions to selectively control flow through the housing between the condenser side tube, the evaporation side tube, and the service port through the at least two separate flow paths;
• a sleeve rotatably disposed within the housing and fixed to the shut-off ball valve for rotating the ball valve when the sleeve is rotated, the sleeve including an end that extends out of the housing through the service port;
• and
• the control valve is rotatably disposed within the sleeve and projects beyond the end of the sleeve, the control valve includes an internal flow path that is in communication with atmosphere through the service port and that can be selectively placed in communication with the condenser side tube and the evaporation side tube through the at least two separate flow paths of the shut-off ball valve, the control valve is movable relative to the sleeve into a first position preventing flow through internal flow path and through the service port, and a second position that permits flow through the internal flow path and through the service port.