Which non return valve type is best suited for high viscosity liquids?

In a reciprocating pump design I am trying to place 2 non return valves. Normally these would be a simple ball on a seat which lifts to allow the liquid to pass in one direction when the direction is reversed the ball falls and blocks reverse flow. Now the question is when using very viscous materials (like a syrup) which type of basic non return valve is best. to employ. The challenge is to have a design of valve which closes very quickly to prevent back flow. Yes it is appreciated that the reverse closing action can be speeded up using a spring. The stronger the spring the quicker it closes but on the intake port to my pump the fluid is under atmospheric pressure (open reservoir) and if a spring of too great strength is used then it is impeded to open if a spring of too great a force is used and the pump may Cavity. Any suggestions please?. For reference the inlet is at least 25mm diameter and I wish to draw into the pump on the UP stoke at least 200cc in 2 seconds