Fluid valve

A valve cartridge for a live insertion valve for a pipe, the valve cartridge comprising a valve member, wherein the valve cartridge is configured such that, in use, the valve member is moveable between an inactive state in which the valve member permits a flow of fluid through a pipe, and an active state in which the valve member blocks a flow of fluid through said pipe;

• wherein the valve member comprises a first seal and a second seal, wherein the valve cartridge is configured such that, in use, the first seal is arranged to block a flow of fluid along said pipe and the second seal is arranged to block a flow of fluid in a direction transverse to said pipe when the valve member is in the active state;
• wherein the first seal comprises first and second seat portions on opposing sides of the valve member, and the second seal is seated on the first and second seat portions, and wherein:
• the second seal comprises a curved cross-sectional profile and each of the first and second seat portions defines a curve or arc in cross-section which conforms to a cross-sectional profile of the second seal, and/or
• the second seal comprises an annular seal and each of the first and second seat portions is curved in a circumferential direction of the second seal to conform to a circumference of the second seal.