What Slack & Parr does

Slack & Parr is a UK-headquartered precision engineering company, founded in 1917 in Kegworth, Derbyshire, that designs and manufactures high-precision gear metering pumps, industrial dosing pumps, and rotary hydraulic flow dividers. Its core technology centres on hardened steel involute gears machined to 1–2 micron tolerances, with flow capacities ranging from 0.014 cc/rev in spin-finish pumps up to 2,000 cc/rev in large-capacity acrylic/carbon-fibre metering pumps, and specialised material combinations to handle corrosive solvents such as DMF and Sodium Thiocyanate as well as high-viscosity polymers at temperatures up to 450°C. The company serves a diversified industrial customer base across man-made fibre spinning (acrylic, polyester, nylon, spandex, aramid, PAN precursor), composites (carbon fibre for aerospace, defence, infrastructure), general industrial manufacturing (oils, paints, chemicals, food), hydraulic systems, and racing/automotive applications, with named customers including Toyota Derby, ORYX GTL, MAN Hydraulics, University of Nottingham, and the AxFlow distribution network across Germany, Italy, and Ireland.

The business operates a hardware-led revenue model combining new equipment sales, spare parts (including 35+ Zenith-replacement series), and repair/refurbishment services executed across direct sales/service offices in the UK, USA (Charlotte, NC) and China (Shanghai), with regional service centres in Taiwan and Mexico and an agent network spanning 25+ countries. Asia-Pacific accounts for 60% of global revenues. Pricing is bespoke and quote-based against customer specifications, typically delivered under multi-year contracts. Disclosed annual sales were approximately £12m at the time of the July 2023 administration, after which the business and its overseas subsidiaries were acquired in August 2023 by Hayward Tyler Fluid Handling Limited, a subsidiary of Avingtrans plc, preserving the brand, the 100-strong workforce, and the management team including Managing Director Edward Barrington. The company holds ISO 9001:2015 certification and is a member of Composites UK.

Name

Slack & Parr

Legal name

Slack & Parr Group Limited

Website

https://slackandparr.com

Company type

Private

Founded year

1917

Operating status

Operating

Headcount range

51–100 employees

Ownership category

akta.pro rank

Product category

Precision Gear Metering Pumps

NAICS

Measuring, Dispensing, and Other Pumping Equipment Manufacturing (333914), Pump and Compressor Manufacturing (33391), Totalizing Fluid Meter and Counting Device Manufacturing (334514)

SIC

Pumps & Pumping Equipment (3561)

akta.pro primary industry

Specialty & Metering Pumps (IMAHANAC)

akta.pro secondary industry

Positive Displacement Pumps (IMAHANAB)

Keywords

• Precision gear metering pumps
• Industrial dosing pumps
• Hydraulic flow dividers
• Man-made fibre pumps
• Pump refurbishment services

Headquarters

HQ city

Derby

HQ country

United Kingdom

HQ region

Europe

Offices6 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Supply Chain, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. Precision Gear Pump Sales: Manufacture and sale of high-precision gear metering pumps, industrial dosing pumps, and hydraulic flow dividers. Pumps are designed to customer specifications and manufactured to order. Revenue from new equipment sales to global OEM and end-user customers.
2. Spare Parts and Components: Supply of replacement parts and interchangeable spare components. Compatible with B9000, C9000, H9000, and various competitor pump ranges including Zenith replacements.
3. Repair and Refurbishment Services: Comprehensive pump refurbishment including decontamination, burn off, CMM inspection, clean room assembly, testing, and machining. Service centers in UK, USA, and China.

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels6 records

Core offering

Slack & Parr designs and manufactures high-precision gear metering pumps, industrial dosing pumps, and rotary hydraulic flow dividers built around hardened steel involute gears machined to 1-2 micron tolerances, with pump capacities ranging from 0.017cc per revolution up to 1000cc per revolution. Products are built-to-order for customer-specific applications across man-made fibre spinning, composites processing, automotive, hydraulics, food, pharmaceutical and chemical industries, supported by global service centres for repair, refurbishment and spare parts.

Product overview

Slack & Parr is a precision engineering company manufacturing high-precision gear metering pumps, industrial dosing pumps, and rotary hydraulic flow dividers. Founded in 1917, the company operates from a 64,000 sq ft facility in Kegworth, Derbyshire, UK, with additional facilities in Charlotte, NC (USA) and Shanghai, China. The product portfolio centers on gear pump technology including the SPA-R, SPH, SPC, SPD, SPT, SPS, SPG, SP2014, SP1658, and SP2164 pump series, complemented by hydraulics products (Flow Divider FDL/FDR, Flow Meters, Pressure Intensifiers), and the PULSELESSFLOW sub-brand for low viscosity applications. The company was acquired by Hayward Tyler Fluid Handling (Avingtrans plc subsidiary) in August 2023.

Differentiator

Problem solved

Functional benefit

Brands

• PULSELESS FLOW: A sub-brand combining SPLV water and low viscosity dosing pumps with SPA-R general-purpose gear pumps for industrial fluid metering applications.

Products and services

• SPA-R Pump A versatile multi-purpose single inlet/outlet gear pump with interchangeable sealing options including lipseal, double lipseal, packed gland, mechanical seal, and magnetic coupling. Output per revolution ranges from 0.15-90cc with viscosity handling from 0.1-5000 Poise for industrial metering and dosing across oils, paints, cosmetics, adhesives, food and chemical applications.
• SPH Pump Traditional single outlet hot polymer pump with multiple material options and coatings. Output per revolution ranges from 0.150 to 2.920cc, with maximum outlet pressure of 5000 psi and operating temperature up to 450 degrees for man-made fibre spinning applications.
• SPC Pump Single outlet large capacity gear pump with outer drive gear, compatible with competitor BLB range. Output per revolution 5-100cc, viscosity 0.1-1000 Poise, maximum operating temperature 175 degrees.
• SPD Pump Single outlet large capacity gear pump with inline drive, compatible with competitor HLB range. Output per revolution 6-50cc, viscosity 100-5000 Poise, maximum outlet pressure 3625 psi.
• SPT Pump Gear pump available with saddle for installation and optional Inlet/Outlet trunnion, compatible with competitor BPB range. Output per revolution 0.146-2.920cc, viscosity 0.01-1000 Poise for industrial oil metering.
• SPS Pump Small capacity gear pump with outlet per revolution from 0.017cc to 0.5cc for low-flow precision metering.
• SPG Pump Mechanical fuel pump for classic racing cars and boats with multiple gear options (6mm, 9mm, 11mm) providing output per revolution of 0.833-1.515cc, designed for 100 octane fuel and interchangeable with Lucas fuel pumps.
• SP2014 Pump Single input/output two-gear pump designed for automotive underbody sealant application, using special materials for exceptional wear resistance with demonstrated efficiency exceeding 99.9% in trials at Toyota Derby.
• SP1658 Pump Precision metering pump for paint applications featuring flushing ports for ease of cleaning and colour change. Output per revolution 1x3cc, viscosity 0.5-20 Poise, maximum outlet pressure 1500 psi.
• SP2164 Pump Precision metering pump for paint applications with output per revolution of 1x2.4cc and maximum operating temperature of 200 degrees.
• SPLV Pump Water and low viscosity dosing pump in the PULSELESSFLOW sub-brand designed for precision gear metering of water and low viscosity fluids at higher pressures using special material combinations.
• SPO Spin Finish Pump Spin finish metering pump engineered for application of finish emulsions onto filaments typically used in hot-melt manufacture of POY and FDY polyester yarns, with capacities down to 0.014cc per revolution and high accuracy including at low speeds.
• Flow Divider FDL High accuracy rotary Flow Divider with ground gears and lapped finishes, standard flow range 9-90 litres per minute per section for total input, designed for synchronized hydraulic operations.
• Flow Divider FDR High accuracy rotary Flow Divider with ground gears and lapped finishes, standard flow range 1.5-27 litres per minute per section for total input.
• Stainless Steel Flow Divider FDR Stainless steel Flow Divider engineered for highly corrosive environments including marine and oil industry applications.
• Flow Meter FML High accuracy rotary Flow Meter for precise flow measurement in hydraulic systems.
• Flow Meter FMR High accuracy rotary Flow Meter for precise flow measurement in hydraulic systems.
• Pressure Intensifiers Pressure intensifiers for hydraulic applications requiring amplified pressure output, including testing applications such as F1 steering component testing using the FDRX flow divider.
• Combined Pump & Drive Dynamically engineered combined pump and drive units providing integrated fluid metering solutions for fibre and industrial applications, with bespoke drive configurations including couplings, gearboxes and electric brakes for major plant installations.
• PULSELESSFLOW Sub-brand Product Range Sub-brand encompassing the SPLV water/low viscosity pumps and SPA-R general-purpose gear pumps for industrial low viscosity fluid metering at higher pressures under the PULSELESSFLOW commercial brand.
• Spare Parts and Compatible Replacement Pumps Supply of replacement parts and interchangeable spare components, including Zenith pump replacements compatible with 35+ pump series such as B9000, C9000, H9000, BLB, BPB, HLB, HMB, HPB and HPD.
• Repair and Refurbishment Services Comprehensive pump refurbishment including decontamination, burn off, CMM inspection, clean room assembly, testing and machining, delivered through service centres in the UK, USA and China.

Quantifiable outcome

• Sealant consumption fell considerably due to pump efficiency exceeding 99.9% in automotive underbody sealant application trial
• +3 more outcomes

Named customers7 records

Segments6 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Scale indicators7 records

Recent moves10 records

Expansion highlights6 records

Broad incumbents

• Flowserve Corporation: Flowserve is one of the world's largest manufacturers of pumps, valves, seals and related fluid handling equipment, serving oil & gas, power, chemical and water industries. While far larger and broader than Slack & Parr, it competes in industrial pumps for chemical, power and process markets served by Slack & Parr.
• Verder Group: Verder is a European-headquartered industrial pumps group (gear, peristaltic, diaphragm, centrifugal) serving chemical, food, pharmaceutical and water treatment markets. It overlaps with Slack & Parr in industrial metering pumps, food & beverage dosing, and chemical applications, particularly in EMEA.
• Graco Inc. Graco is a broad fluid handling equipment manufacturer with product lines including precision metering, dispensing and transfer pumps for industrial, automotive and process applications. It overlaps with Slack & Parr in industrial fluid metering and sealant/adhesive applications such as automotive underbody coating.
• Watson-Marlow (Spirax Group): Watson-Marlow is a global specialist in peristaltic pumps, tubing and fluid path solutions serving pharmaceutical, chemical, food & beverage and industrial process markets. It is a broader-incumbent fluid-handling peer that overlaps with Slack & Parr's industrial and food processing dosing/metering applications, though via a different pump technology.
• Sulzer Ltd: Sulzer is a global industrial engineering company with a major pumps product line serving water, oil & gas, power, and chemical applications. It is a broader incumbent in industrial pumping adjacent to Slack & Parr's chemical and industrial metering pump categories.

Direct peers

• Zenith Pumps: Zenith is the direct competitor in precision gear metering pumps, explicitly named in Slack & Parr's materials as the dominant incumbent whose B9000, BLB, BPB, HLB, HMB, HPB and HPD ranges Slack & Parr offers drop-in replacements for. Headquartered in the USA, Zenith serves polymer, chemical, man-made fibre and paint markets with very similar product positioning.
• Viking Pump (IDEX): Viking Pump, part of IDEX, manufactures internal gear pumps and positive displacement pumps for industrial fluid handling including chemicals, paints, fuels and resins. It is one of Slack & Parr's direct peers in precision gear pumping for chemicals, fuels, paints and adhesives applications.
• Witte Pumps & Technology: Witte is a German precision gear pump manufacturer supplying metering pumps for chemical, polymer, paint, food, cosmetics and pharmaceutical applications — closely overlapping Slack & Parr's industrial metering pump portfolio and target industries across Europe.
• Maag (Dover): Maag is a leading manufacturer of gear pumps, gear pump metering systems and filtration equipment for polymer, chemical, food and man-made fibre processing — essentially the same end markets as Slack & Parr (extrusion, spinning, polymerization). Its product range overlaps directly with Slack & Parr's extrusion melt pumps, polymer metering pumps and acrylic pumps.

Emerging players

• SEEPEX: SEEPEX manufactures progressive cavity pumps and metering systems used in chemical dosing, food, wastewater, and polymer applications. While it uses a different pump principle, it competes head-to-head with Slack & Parr in industrial dosing and metering of viscous and abrasive fluids across the same end-markets.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/sharer/sharer.php?u=https%3A%2F%2Fwww.slackandparr.com
• LinkedInlinkedin.com/company/3844625

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries4 records

Funding overview

Funding rounds1 record

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Slack & Parr