Rocker Valve With Rocker Valve Mechanism

A rocker valve comprising:

• a valve body comprising first and second fluid ports;
• a rocker valve mechanism located at least partially in the valve body, comprising:
• a single pivot arm pivotally mounted relative to the valve body;
• a first plunger pivotally fixed to the single pivot arm by a first fixed pivot;
• and
• a second plunger pivotally fixed to the pivot arm by a second fixed pivot, the second plunger acting in opposition to and moving substantially in parallel with the first plunger when the single pivot arm is pivoted relative to the valve body;
• and
• the rocker valve further comprising a flexible seal member extending in a lateral direction across the first and second fluid ports, wherein the flexible seal member comprises a first sealing region attached to the first plunger and a second sealing region attached to the second plunger, wherein the flexible seal member is movable by the first plunger to a first position in which the first fluid port is closed by the first sealing region and is movable by the second plunger to a second position in which the second fluid port is closed by the second sealing region, and
• wherein the rocker valve mechanism is configured such that when the single pivot arm is pivoted relative to the valve body, a rotation of at least one of the first and second plungers about its respective fixed pivot is constrained solely by the flexible seal member.