What The Strainrite Companies does

The Strainrite Companies is a family-owned manufacturer of industrial liquid filtration products, founded in 1978 and headquartered in Auburn, Maine. The company designs and produces filter bags (its founding heritage under founder John H. Lapoint Jr., who was integral to the original filter bag technology), Clarity liquid filter cartridges (membrane, depth, and large-diameter pleated), Madd MAXX large-diameter hybrid elements that combine bag-style ease-of-use with cartridge filtration performance, and a full line of filter vessels and housings. Its products are built on proprietary filter media formulations spanning polyethersulfone, polysulfone, nylon, PTFE, polypropylene microfiber, and borosilicate microglass, combined with patented construction methods such as Tri-Seal P-flange welding, AquaRite Five Points of Seal vessel design, Hi-Pro Micro graduated layering (patent pending), and continuous microfiber blowing equipment with online monitoring for fiber diameter control.

Manufacturing is conducted in silicone-free, ISO 9001-accredited facilities, with multiple product lines qualified under FDA CFR 21, USP Biological Reactivity Class VI, NSF/ANSI Standard 53, and GMP frameworks; selected products are recommended by the U.S. EPA for cyst removal. The company sells across eight vertical markets, with food & beverage and pharmaceutical/biotechnology identified as primary segments, alongside water/municipal, microelectronics, inks/paints/coatings, CBD/THC botanical extraction, medical devices, and oil & gas/chemical. Specialty cartridges address application-specific needs such as sterilizing-grade filtration, endotoxin reduction, vent/gas sterilization, ink-jet orifice protection, and potable water cyst reduction.

The business model is sales-led B2B with custom quotation-based pricing and multi-year contract cadence. Customers submit requirements via a 'Request A Quote' form or direct sales contact, indicating project-based or recurring supply engagements rather than self-serve transactional commerce. Customers are served globally across the U.S., Europe, and Asia through experienced field sales professionals, a master distributor network, and strategic supply-chain partnerships with North American needle punch manufacturers. The company has no external institutional shareholders, no parent company, no disclosed M&A or restructuring activity, and retains founder-family ownership since incorporation.

Name

The Strainrite Companies

Legal name

The Strainrite Companies

Website

https://strainrite.com

Company type

Private

Founded year

1978

Operating status

Operating

Headcount range

51–100 employees

Short description

The Strainrite Companies is a family-owned manufacturer of liquid filtration products—filter bags, cartridges, vessels, and Madd MAXX hybrid elements—serving food & beverage, pharmaceutical, and industrial customers across the U.S., Europe, and Asia from its 1978-founded Auburn, Maine headquarters.

Ownership category

akta.pro rank

Product category

Industrial Liquid Filtration Products

SIC

Industrial & Commercial Fans & Blowers & Air Purifing Equip (3564)

akta.pro primary industry

Separation & Filtration Equipment (Filters, Centrifuges, Membranes) (IMAHAEAB)

akta.pro secondary industry

Industrial Filtration Media & Dust Collection Textiles (Air/Liquid Filtration) (IMAOADAC)

Keywords

• Liquid filtration products
• Filter cartridges
• Filter bags
• Filtration vessels
• Industrial filtration

Headquarters

HQ city

Auburn

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Filtration Products Sales: B2B sale of liquid filtration products including filter cartridges, filter bags, vessels/housings, and Madd MAXX hybrid elements. Revenue generated through direct sales force and distributor network. Products are manufactured in silicone-free, ISO9001 accredited facilities with GMP-compliant options.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

The Strainrite Companies designs and manufactures liquid filtration products including proprietary filter cartridges, filter bags, vessels/housings, and Madd MAXX large diameter hybrid elements. Products serve industries such as food & beverage, pharmaceuticals, microelectronics, water/municipal, paints/coatings, oil & gas, and CBD/botanical extraction. Manufacturing is performed in silicone-free, ISO9001 accredited facilities with many products produced in accordance with GMP requirements.

Product overview

The Strainrite Companies offers a comprehensive liquid filtration product portfolio organized around three core product lines: Clarity Cartridges (membrane and depth cartridge filters), Filter Bags (felt, mesh, extended life, high efficiency, and specialty bags), and Madd MAXX Large Diameter Hybrid Elements. Supporting these are Vessels and Housing systems, Specialty Application Cartridges, and Capsules. The Clarity Cartridge line includes Pur-MAXX membrane filters (PES, polysulfone, nylon, charged nylon, PTFE) and Poly-MAXX/Fiber-MAXX depth filters. The Filter Bag portfolio spans Micron-Rated Felt (Classic, Sure-Weld), Micron-Rated Mesh, Extended Life (EVP, AA Added Area, POXL/PEXL), High Efficiency (SPMF, HPM, Accu-Rite, Aqua-Rite Hi-Pro Micro), and Specialty bags (BRB Resinator, Mag-Bag, Absorb-Rite, Oil Log, Wax Removal, Carbon Ready). The Madd MAXX line provides large diameter pleated hybrid elements combining bag and cartridge filtration benefits in multiple configurations for various housing requirements. Specialty cartridges address industry-specific needs in Food & Beverage (Bev-MAXX, Bev-Rite, Vino-MAXX E, Trap-Rite, Guard-Rite), Pharmaceutical (Pur-MAXX SG sterilizing grade, Endo-MAXX CN endotoxin reduction), Vent Air & Gas (Vent-MAXX, Vent-Rite PTFE), Microelectronics (PES-E), and Ink applications (Ink-Jet IKP/IKG/IKS).

Differentiator

Problem solved

Functional benefit

Brands

• Clarity: Product line of liquid filter cartridges including membrane, pleated depth, and large diameter pleated cartridges
• Madd MAXX
• Pur-MAXX
• Poly-MAXX
• Fiber-MAXX
• Vino-MAXX
• Bev-MAXX
• Aqua-MAXX
• Vent-MAXX
• MAXX-Cap
• Resinator
• Endo-MAXX CN
• Aqua-Rite

Products and services

• Clarity Cartridge Filters Proprietary liquid filter cartridges for clear filtration of liquids including sterilization and microorganism separation, available in membrane, pleated depth, and large diameter pleated configurations designed for continuous and repeatable effluent quality.
• Strainrite Filter Bags Liquid filter bags developed from the company's founding innovation, available in micron-rated felt, micron-rated mesh, extended life, high efficiency, and specialty categories for diverse industrial filtration applications.
• Madd MAXX Large Diameter Hybrid Elements Large diameter pleated hybrid filter elements combining bag filtration ease-of-use with cartridge filtration efficiency, featuring inside-out flow design that keeps contaminants inside the element during change-out.
• Vessels and Housing Systems Filter bag and cartridge housings including SRL Low Flow, SRHD Heavy Duty, SRID Industrial Duty, SRMB Multi-Basket, SRCT/SRVT Sanitary Cartridge, and AQ2 Aqua-Rite specialty vessels for various filtration system requirements.
• MAXX-Cap Capsules Single use/multi-use ultrapure polypropylene capsule filters available in sizes from 5 inches to 40 inches, featuring thermal bonding construction with low extractables and internal void space reduction.
• BRB Resinator Filter Bags

Quantifiable outcome

• Inside-out flow design eliminates downstream contamination during filter change-out
• +8 more outcomes

Segments8 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Two partnerships are on record, tiered core.

• North American Needle Punch ManufacturerscoreStrategic or Co-development PartnerLong-term strategic partnerships with North America's largest and most respected needle punch manufacturers. These partnerships provide access to state-of-the-art high speed needling equipment that continuously monitors key specifications in real time, resulting in most uniform and consistent fabric in the industry.
• Master Distributor PartnerscoreChannel Partner/ Reseller/ DistributorCompany works with master distributor partners who provide local sales support, inventory, and customer relationships. Blog mentions 'master distributor partners' along with 'distributor partners' in collaborative customer support model.

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• MANN+HUMMEL: Global filtration specialist with industrial liquid filtration, membrane, and cartridge products across life sciences, food & beverage, and process industries — broad incumbent with overlapping product categories.
• Entegris: Specialty materials and fluid handling provider serving semiconductor and microelectronics with ultrapure filtration and purification — directly comparable in Strainrite's microelectronics and UHP fluid filtration offerings (PES-E overlap).
• Donaldson Company: Industrial filtration manufacturer with liquid filter cartridge and bag offerings serving food & beverage, chemical, and industrial process markets — comparable product breadth and vertical exposure.
• Sartorius AG: Biopharmaceutical-focused filtration and membrane manufacturer with sterilizing-grade cartridges and capsules for pharma and biotech — directly comparable in pharma-grade membrane filtration (Pur-MAXX SG overlap).
• Pall Corporation: Danaher-owned industrial filtration giant with extensive liquid filtration cartridge, bag, and housing portfolio serving pharma, food & beverage, microelectronics, and industrial markets — directly comparable product categories with broader global scale and validation depth.
• 3M Purification: Large diversified manufacturer with a global liquid filtration portfolio spanning cartridges, bags, and housings for food & beverage, industrial, and life sciences applications — broad incumbent competing across Strainrite's verticals.
• Eaton Filtration: Diversified industrial manufacturer whose Filtration division produces liquid filter bags, cartridges, and housings across food & beverage, chemical, and oil & gas applications — comparable core product lines and customer verticals.

Direct peers

• Porvair Filtration Group: UK-based specialty filtration manufacturer producing liquid filtration cartridges, filter media, and housings for pharma, food & beverage, and industrial applications — closely comparable in scale, product mix, and end-market focus.
• Meissner Filtration Products: Specialty manufacturer of membrane filters, capsules, and cartridges for pharmaceutical, bioprocessing, and microelectronics applications — closely comparable in capsule and membrane cartridge product categories.

Emerging players

• Cole-Parmer: Distributor and manufacturer of laboratory and industrial filtration products including cartridges and capsules for pharma and biotech applications — partial overlap in cartridge filtration, with broader distribution into Strainrite's end markets.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

Compliance8 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 The Strainrite Companies