ErtelAlsop

What ErtelAlsop does

ErtelAlsop is a U.S.-based manufacturer of liquid depth filtration equipment and consumable filter media, founded in 1920 and headquartered in Kingston, New York. The company was formed through the merger of Ertel Engineering (founded 1932) and Alsop Engineering (founded 1920), and was acquired by Ahlstrom, a global fiber-based specialty materials company, in December 2024. Its product portfolio spans plate and frame filter presses (Diamond, AccuScale, BevExpress, EFS, EUS, Letre, and Vapor-Master enclosed series), recessed chamber filter presses, lenticular filter housings and Pak cartridges, laboratory filters, and a growing line of single-use MicroCap depth filter capsules for biopharma.

Underlying technology is rooted in proprietary depth filtration media, including Zeta-Potential charged filter sheets (MicroMedia, AlphaMedia, MicroClear activated carbon), the BioClean filter plate design with internal porting, the Diamond Configuration that eliminates liquid hold-up, and the Vapor-Master enclosed system for hazardous vapor applications. Filter media is offered in 19+ grades with 300+ precision die formats, and the company holds a Drug Master File at FDA CDER to support pharmaceutical customer validation.

ErtelAlsop generates revenue primarily through equipment sales, consumable filter media sales, and equipment rentals with rent-to-own options, distributed via an exclusive authorized distributor network covering all U.S. states and over 20 international markets. End markets include pharmaceutical, food and beverage, chemical, flavor and fragrance, cosmetic, electric utility, cannabis extraction, energy/biofuels, metals and mining, and industrial wastewater. Pricing is quote-based and not publicly disclosed, with equipment financing available through a North Star Leasing partnership.

Name

ErtelAlsop

Legal name

ErtelAlsop

Website

https://ertelalsop.com

Company type

Private

Founded year

1920

Operating status

Acquired

Headcount range

51–100 employees

Short description

ErtelAlsop is a U.S. manufacturer of liquid depth filtration equipment and filter media, serving pharmaceutical, food and beverage, chemical, cannabis, and industrial customers through a global distributor network. Acquired by Ahlstrom in December 2024.

Ownership category

akta.pro rank

Product category

Industrial Filtration Equipment and Filter Media

akta.pro industry

PRIMARYIMAHAEAB

Separation & Filtration Equipment (Filters, Centrifuges, Membranes)

Industrials, Manufacturing & Construction/Industrial Machinery & Heavy Equipment/Process & Industrial Plant Equipment

SECONDARYAFAJAIAJ

Filtration & Filter Aids (Diatomaceous Earth, Perlite, Cellulose)

Agriculture & Food Production/Food Ingredients & Additives/Enzymes & Processing Aids (Food Enzymes, Clarifying/Filtering Aids)

Keywords

• Depth filtration equipment
• Plate and frame filters
• Filter media sheets
• Lenticular filter cartridges
• Single-use filter capsules

Headquarters

HQ city

Kingston

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, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Filtration Equipment Sales: Sale of plate and frame filter presses, lenticular filter housings, laboratory filters, and recessed chamber filter presses. Equipment ranges from bench-scale lab filters to large production-scale filter presses handling up to 300 ft³ solids.
2. Filter Media and Consumables: Sale of depth filter sheets, filter pads, lenticular cartridges, filter paper, diatomaceous earth filter aids, and activated carbon filter aids. Consumable products include AlphaMedia, MicroMedia, and MicroClear product lines.
3. Single-Use Filter Capsules: Sale of MicroCap single-use depth filter capsules for biopharma and pharmaceutical applications, eliminating need for stainless steel housings and cleaning validation.
4. Equipment Rentals: Weekly, monthly, and annual rental programs for filtration equipment including laboratory filters, pilot-scale plate and frame filters, and large volume filter presses. Includes rent-to-own option where payments can be applied toward purchase.

Go-to-market motion1 record

Distribution channels4 records

Marketing channels4 records

Core offering

ErtelAlsop manufactures a complete line of liquid depth filtration equipment, including plate and frame filter presses (Diamond, AccuScale, BevExpress, EFS, EUS, Letre, Vapor-Master series), recessed chamber filter presses, laboratory filters, and lenticular filter housings. The company also produces consumable filter media — depth filter sheets (AlphaMedia, MicroMedia, MicroClear), lenticular Pak cartridges, diatomaceous earth (Celpure), activated carbon, filter paper, and filter cloth — plus single-use MicroCap capsules and offers filter rentals with rent-to-own options for pharmaceutical, food and beverage, chemical, cosmetic, cannabis, flavor and fragrance, electric utility, and industrial wastewater applications.

Product overview

ErtelAlsop is a manufacturer of depth filtration equipment and filter media, founded in the 1920s and acquired by Ahlstrom in December 2024. The product portfolio consists of two main categories: filtration equipment and filter media, plus single-use capsules. Filter equipment includes Plate & Frame Filter Presses (Diamond Series, AccuScale Series, BevExpress Series, EFS Series, EUS Series, Letre Series), Laboratory Filters (Cylinder Series), EA Series Recessed Chamber Filter Presses, and Lenticular Filter Housings (Domed, Sanitary, Industrial, Horizontal, Electric Utility). Filter media includes Depth Filter Sheets (AlphaMedia, MicroMedia series, MicroClear), Lenticular Pak Cartridges (Zeta-Pak, ZetaDri-Pak, Disc-Pak, Bio-Pak, AquaKv-Pak), Diatomaceous Earth (Celpure), Activated Carbon, Filter Paper, and Filter Cloth. Single-use offerings include MicroCap, MicroCap Pro, and MicroCap Laboratory Cabinet capsules. Services include filter rentals with rent-to-own options. All products serve pharmaceutical, food & beverage, chemical, cosmetic, flavor & fragrance, and electric utility industries.

Differentiator

Problem solved

Functional benefit

Products and services

• Diamond Series Plate & Frame Filter Press Laboratory-scale plate and frame filter designed for critical applications with low hold-up volumes. Internally ported design eliminates gasket needs, available in 4, 8, or 12 inch designs with Diamond Configuration for complete drainage.
• AccuScale Series Plate & Frame Filter Bench scale plate and frame lab filters providing scalable filtration from lab to production. Available in 4 inch and 8 inch square configurations with easy filter sheet changeover.
• BevExpress Series Externally ported filters designed for small to medium wineries, breweries, distilleries, and food and beverage markets. Available in BW (40x40cm Noryl plates) and ME (20x20cm Noryl plates) lines.
• EFS Series 12" Plate and Frame Filter Press Internally ported, economical 12-inch square plate and frame filter press. Cart mounted with BioClean Filter Plates and hand wheel closure with hydraulic assist. Designed for distilled beverages, cosmetics, pharmaceuticals, and flavors & fragrances.
• EUS Series 16" Plate and Frame Filter Press Versatile plate and frame filter press with filtration area from 2.8 to 142 square feet. Equipped with BioClean Filter Plates as standard, eliminates screws and internal threads for reduced cleaning time.
• Letre Series 24" and 36" Plate and Frame Filters Industry-standard plate and frame filters for critical liquids with internal feed and discharge porting. Available in 24 inch (Letre 604) and 36 inch (Letre 910) configurations with thorough washing capability.
• Vapor Master Enclosed Plate and Frame Filter Press Patented enclosed plate and frame filter press for filtration of harmful fluids in a completely sealed, vapor-tight environment. Eliminates worker exposure to toxic vapors. Available in VM-300, VM-400, and VM-604 models.
• Cylinder Series Laboratory Filters Stainless steel laboratory filters with volumes from 250ml to 8000ml. Available in 4T, 10T, 21T, 43T, and 50P series with optional heating/cooling jacket and dividing flange for multi-stage filtration.
• EA Series Recessed Chamber Filter Press Industry-leading recessed chamber filter presses with fast acting hydraulic systems, uniform fill manifolds, safety lanyards, and reverse core blow capability. Available in sizes from 1 to 300 cubic feet capacity.
• Domed Filter Housing Lenticular filter housing with Double O-Ring Pak System and polished stainless steel housing. Quarter-turn lock with static core structure eliminates misalignment concerns. Holds up to four 12 or 16-inch Pak lenticular filter cartridges.
• Sanitary Pharmaceutical Filter Housing Highly polished sanitary filter housing with sanitary fittings, vent connection, and no internal threads, supplied in 316L stainless steel for pharmaceutical and biotech applications.
• Industrial Filter Housing Standard industrial filter housing for everyday chemical applications. Available in Carbon Steel, 304, 316, or 316L Stainless Steel, Polypropylene, or Fiberglass Reinforced Polypropylene.
• Horizontal Filter Housing Horizontal orientation filter housing allowing single-person operation without overhead hoists. Features Lock and Load system for easy loading and unloading of Pak cartridges.
• Electric Utility Filter Housing 12UF series filter housing for filtration of steam turbine, voltage regulator, and circuit breaker insulating oils. Removes water and eliminates water-induced hazes from insulating oil.
• Cannaskid 4 Stage Lenticular Filtration System Four-stage filtration skid designed for ethanol and hydrocarbon cannabis extractors. C1D1 compliant, handles cryogenic or room temperature extractions. Processes miscella or crude oil through pre-filtration, clarification, decolorization, and final trap filtration stages.
• AlphaMedia Depth Filter Sheets 100% cellulose depth filter sheets with no fillers or resins, used for intermediate to coarse filtration in edible oils, insulating oils, cough syrups, plating solutions, and fruit juices. Includes G-Series with wet strength resin.
• MicroMedia Depth Filter Sheets Cellulose-based depth filter sheets with filter aid and wet strength resin. Exhibits positive charge Zeta-Potential for attracting negatively charged particles. Available in MicroMedia, L, XL, LXL, and PXL series.
• MicroClear Activated Carbon Filter Sheets Activated carbon-impregnated filter media for color and odor removal, with surface areas of 500-2000 m²/gm and sub-micronic filtration and adsorptive treatment capabilities.
• Lenticular Pak Cartridges Depth lenticular filter modules in 12 or 16 inch diameter with 5-18 stacked filter cells. Includes Zeta-Pak, ZetaDri-Pak, Disc-Pak, Bio-Pak, and AquaKv-Pak variants for various filtration applications.
• Celpure Diatomaceous Earth Filter Aid Highly purified diatomaceous earth for filter cake permeability. Ultra pure, acid washed grades S65, S300, and S1000 for pharmaceutical, biotech, food, and chemical applications.
• Activated Carbon Filter Aid Cabot activated carbon products including SX Ultra, D10, and S-51 for decolorization, purification, and taste/odor removal in pharmaceuticals, beverages, and specialty chemicals.
• Filter Paper High quality specialty filter paper in 2000-9000 series with retention from 1-100 microns. Available with smooth or creped surface, bleached or unbleached, with or without wet strength resin.
• Filter Cloth for Filter Press Replacement filter cloth in polyester, nylon, Teflon, or cotton. Available in woven and non-woven materials including monofilament, multifilament, and needle-punched felts.
• MicroCap Single-Use Depth Filter Capsules Disposable depth filter capsules in 6 sizes (1 to 30 inch height) with effective filter area from 23 cm² to 2880 cm². Eliminates cleaning and validation requirements.
• MicroCap Pro Single-Use Depth Filter Capsules Production-scale single-use depth filtration system for biopharma and pharmaceutical industries. Flexible alternative to traditional depth filtration with ready-to-use platform. Launched in October 2020.
• MicroCap Laboratory Cabinet Laboratory cabinet system storing 48 MicroCap capsules in 12 different grades. Contains MC1 capsules with XL Series and Micro-Media grades of depth filter media.
• Filter Rentals Weekly, monthly, and annual filter rental program covering laboratory filters, pilot-scale plate and frame filters, large volume filters, lenticular housings, and recessed chamber filters. Rent-to-own options are available.

Quantifiable outcome

• Plate and frame filters provide the lowest cost of filtration per unit of fluid processed
• +4 more outcomes

Segments10 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

One partnership is on record.

• AhlstromflagshipStrategic or Co-development Partner · 2 December 2024Ahlstrom, a global leader in fiber-based specialty materials, acquired ErtelAlsop to expand its capabilities within specialty materials for life sciences. This acquisition enhances Ahlstrom's market position in filtration for pharmaceuticals, food, and chemical sectors and marks a strategic milestone in its growth and sustainability goals. ErtelAlsop is now branded as 'ErtelAlsop, An Ahlstrom Co.'

Scale indicators4 records

Recent moves7 records

Expansion highlights6 records

Broad incumbents

• GVS: Global filtration manufacturer producing membrane, depth, and capsule filters for life sciences, healthcare, and industrial markets. Comparable in product breadth to ErtelAlsop but with a much larger and more diversified footprint.
• Parker Hannifin (Filtration Division): Diversified industrial conglomerate with a large filtration group (domnick hunter, Whatman) supplying cartridges, capsules, and process filtration. Overlaps ErtelAlsop in pharma and industrial liquid filtration but as one of many product lines.
• Donaldson Company: U.S. industrial filtration leader primarily known for air/gas filtration but with a liquid process filtration portfolio (Donaldson Liquitec) serving chemical, food, and industrial customers. Adjacent overlap to ErtelAlsop's industrial process filtration business.
• Sartorius: Major bioprocess supplier with a single-use filtration capsule portfolio (Sartopore, Sartoclear) competing head-to-head with ErtelAlsop's MicroCap line. Much larger, publicly listed, and focused on upstream/downstream bioprocess.
• 3M Purification: Large incumbent offering depth filter sheets (e.g., Zeta Plus), cartridges, and housings across pharmaceutical, bioprocess, and industrial customers. Direct competitive overlap in depth filtration media, with substantially greater R&D and global reach.
• Eaton: Global power-management company with an industrial filtration business (formerly Hayward) producing bag, cartridge, and depth filtration for process industries. Competes with ErtelAlsop in chemical and industrial liquid filtration at a much larger scale.
• Pall Corporation (Cytiva): Global bioprocess and industrial filtration leader (now part of Cytiva) offering cartridges, capsules, and TFF systems. Overlaps with ErtelAlsop in pharma and bioprocess depth/capsule filtration, but at much larger scale and broader portfolio.

Direct peers

• Meissner Filtration Products: Privately held U.S. manufacturer of single-use filtration capsules, tubing, and bioprocess containers. Closely comparable in size, private ownership, single-use focus, and pharmaceutical customer overlap with ErtelAlsop's MicroCap family.
• Amazon Filters: UK-based manufacturer of depth filter cartridges, lenticular housings, and filter presses serving pharmaceutical, chemical, and food & beverage markets. Similar product mix and mid-market scale to ErtelAlsop, with a European geographic anchor.
• Sparkler Filters: Direct U.S. competitor also manufacturing plate-and-frame filter presses, lenticular housings, and depth filter sheets for pharmaceutical, food & beverage, and chemical markets. Closest product-line overlap to ErtelAlsop in size, geography, and customer base.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/ertelalsop
• Facebookfacebook.com/ErtelAlsop
• LinkedInlinkedin.com/company/ertelalsop

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

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 ErtelAlsop