Fluid dispenser

A dispenser (10) for a dispensable fluid, such as hydrocarbon fuel, of a type comprising an outer canister (12) containing a pressurized propellant, an inner bag (14) containing the dispensable fluid, and a normally closed valve (20). The inner bag (14) has a flexible wall with an orifice (70) having a margin. Two clamping members (40,80,120,130), which may be snap-fitted to each other, clamp the valve (20) to the inner bag (14) at the margin of the orifice (70). A resilient washer (90) is disposed outside the inner bag (14), in intimate contact between one of the clamping members (40) and the margin of the orifice (70), so as to form a fluid-tight seal around the orifice (70).