Disc assembly with branch hole for fluid flow control device

A disc assembly for a fluid flow control device, the disc assembly comprising:

• an annular disc member;
• a cylindrical disc holder having a fist side and a second side;
• a relief bore formed in the first side of the disc holder along a central axis of the disc holder;
• an annular recess formed in the first side of the cylindrical disc holder, the annular recess disposed coaxially with the relief bore and accommodating at least a portion of the annular disc member;
• and
• at least one branch passage formed in the disc holder and providing fluid communication between the relief bore and the annular recess, such that during use pressurized fluid that accumulates in the annular recess between the annular disc member and the disc holder can be relieved through the relief bore via the branch passage.

A disc assembly for a fluid flow control device, the disc assembly comprising:

• a disc member;
• a disc holder having a fist side and a second side;
• a recess formed in the first side of the disc holder and accommodating at least a portion of the disc member;
• and
• at least one fluid passageway formed in the disc holder and extending between the recess and an outer surface of the disc holder such that during use pressurized fluid that accumulates in the recess between the disc member and the disc holder can be relieved through the fluid passageway.