Device having a throttle for reducing the flushing stream from a sanitary flush box, drain valve and sanitary flush box comprising a device of this type

A drain valve for a sanitary flush box, comprising;

• a valve mounting;
• a valve member that has a sealing surface or seal and is movably mounted in the valve mounting;
• a drain connection;
• a valve seat formed on the drain connection, the sealing surface or seal resting on the valve seat in the closed state of the drain valve and, in the open state of the drain valve, freeing an outlet opening delimited by the drain connection, and;
• a throttle, which defines at least one free flow cross section, wherein the throttle is arranged on the opposite side of the valve seat as the valve member in an annular groove of the drain connection of the drain valve, the annular groove axially fixing the throttle in the drain connection;
• wherein the throttle comprises at least two throttle elements, a second of the throttle elements configured to be rotated relative to a first of the throttle elements such that, the size of the at least one free flow cross section can be changed,
• wherein each of the at least two throttle elements comprises one or more latching elements, the one more latching elements of the first of the throttle elements arranged on an end edge facing the one or more latching elements of the second of the throttle elements, the one or more latching elements of the first of the throttle elements configured to engage the one or more latching elements of the second of the throttle elements to allow rotation of the second of the throttle elements in latching steps to change the size of the at least one free flow cross section, and
• wherein the one or more latching elements of the first and second of the throttle elements are configured to secure the position of the second of the throttle elements relative to the position of the first of the throttle elements to prevent unintended rotation of the second of the throttle elements in a mounted state of the throttle.

A sanitary flush box, comprising:

• a connection piece, into which a drain connection of a drain valve can be inserted;
• wherein the drain valve comprises a valve mounting, a valve member that has a sealing surface or seal and is movably mounted in the valve mounting, and a valve seat formed on the drain connection, the sealing surface or seal resting on the valve seat in the closed state of the drain valve and, in the open state of the drain valve, freeing an outlet opening delimited by the drain connection;
• wherein the flush box comprises a throttle, which defines at least one free flow cross section, wherein the throttle is arranged on the opposite side of the valve seat as the valve member in an annular groove of the connection piece of the flush box receiving the drain connection, the annular groove axially fixing the throttle in the connecting piece;
• wherein the throttle comprises at least two throttle elements, a second of the throttle elements configured to be rotated relative to a first of the throttle elements such that the size of the at least one free flow cross section can be changed;
• wherein each of the at least two throttle elements comprises one or more latching elements, the one more latching elements of the first of the throttle elements arranged on an end edge facing the one or more latching elements of the second of the throttle elements, the one or more latching elements of the first of the throttle elements configured to engage the one or more latching elements of the second of the throttle elements to allow rotation of the second of the throttle elements in latching steps to change the size of the at least one free flow cross section;
• and
• wherein the one or more latching elements of the first and second of the throttle elements are configured to secure the position of the second of the throttle elements relative to the position of the first of the throttle elements to prevent unintended rotation of the second of the throttle elements in a mounted state of the throttle.