Model 2500-DA is for two-part viscose compounds containing abrasive filler. Is a positive displacement machine capable of reducing wear because of its double-acting design and abrasion-resistant metering cylinders and seals. The double-acting inline design reportedly reduces stress caused by high viscosity fluids and delivers on-demand dispensing without interruption for reloading the metering cylinders. The 2500-DA is said to double the life expectancy of seals by reducing the recharge cycles necessary during dispensing. Uses 4-way flow directional valves for maintaining accurate flow ratios.