As you can see from the graph above, as viscosities of the fluid increases, the discharge capacity of the pump decreases. Points to remember when pumping high viscous fluids: Position the pump close to or below the level of the fluid source. Suction lines should be increased in size – up to 3 times the size of the pump manifold inlet. Dual manifolds may be used when available. Start the pump slowly using a control valve on the air line. If greater capacity is required, select a larger pump. | | | | | | | | | | | | | | | | |