The company will exhibit at stand F44 where it will highlight how its market-leading three-plate gear pump solutions are being used to improve accuracy, boost process efficiency and reduce waste in the chemicals and process engineering industries.
Highlighting Gear Pump Solutions for Chemical Applications
It will spotlight its EP range of gear pumps which offer simple and cost-effective high-precision solutions for metering, mixing and application of medium viscosity fluids including resins, polymers, inks, paints, sealants, adhesives and coatings, alongside its Pulseless Flow range of pumps which deliver extremely accurate flow control of low viscosity fluids including water. Visitors will also discover the company’s bespoke gear pumps which can be customised to handle the most challenging chemicals, from very low viscosity fluids processed under high pressure to fast-cure resins that require in-line mixing, and corrosive mediums such as hydrochloric and sulfuric acids.
Three-Plate Gear Pumps: Designed for Efficiency and Accuracy
Slack & Parr’s Industrial Director Neil Anderton explains why the company’s benchmark three-plate designs are pivotal to their success:
“We’re keen to show the industry the operational impact of a three-plate gear pump on process efficiency, accuracy and repeatability, and highlight the advantages they offer compared to simple two-plate designs.
“Each of our pumps is made up of at least three precision engineered plates, which create a watertight metal-to-metal seal when working with all but the very lowest viscosity liquids under high pressure.
“This exceptional sealing performance means we don’t need to apply alternative mechanisms such as ‘O’ rings for the vast majority of applications. O rings are common in the industry but can cause very slight sponginess in the plate stack which can result in small but significant variations in flow rate and accuracy.”
Optimising Pump Design for Performance and Repeatability
Anderton goes on to explain how the company’s designs also support optimum performance of the gear mechanism:
“The three-plate configuration creates an internal cavity in which the gear sits and ensures the exact internal clearances can be controlled very accurately. In alternative two-plate pumps, a similar effect is achieved by machining a blind pocket into one of the plates with a radius at the bottom and subsequently chamfering the corresponding tips of the gear. In engineering terms, this is a compromised solution which increases the internal leakage or slip and significantly reduces the pump’s accuracy and repeatability.”
Slack & Parr’s Legacy in Precision Pumping at CHEMUK 2025
Slack & Parr has been delivering high-precision gear metering pumps into the global chemicals market for more than 80 years. Its pumps are built around hardened steel involute gears which are machined to precise tolerances of one to two microns. This results in very small, controlled clearances between the gear and mating components, ensuring almost no internal slip even at high pressures and resulting in extreme accuracy and repeatability of flow.
