OTC-Cartridges

Barton Firtop manufacture: Filters, Strainers, Coalescers, Separators, Pressure Vessels & Static Mixers. They developed ‘green technology’ utilizing 3D Modelling, CFD and FEA, with full validation through live flow test rig.   United Kingdom
http://www.bartonfirtop.co.uk

Boll Filter is the U.S. subsidiary of Boll & Kirch Filterbau, worldwide leader for Lube Oil, Fuel Oil & Ballast Water Filtration equipment. They provide all types of filtration equipment to protect engines with new filters, original manufactured spare parts & factory trained services engineers directly out of our U.S. office in Novi, MI.  United States
http://www.bollfilter.com

Donaldson Company, Inc. is worldwide provider of filtration systems that improve people’s lives, enhance equipment performance, & protect the environment. The company is committed to satisfying needs for filtration solutions through innovative research & development, application expertise, & global presence. United States
http://www.donaldsonfilters.com

Dutch Filtration built knowledge of oilfield filtration solutions on many years of experience. They have a state-of-the-art machine facility to manufacture the products and equipment in stainless steel, carbon steel and other exotic materials. Dutch design, innovate, engineer and manufacture filter equipment and consumables in-house.  Netherlands
http://www.dutchfiltration.com

Enviro-Tech Systems specializes in all aspects of oil/water separation, including the manufacturing and design of equipment for a complete produced water separation process, the refurbishment or repair of existing equipment, as well as the service and product improvement of all produced water equipment brands; Wemco, US Filter, Monosep and others.   United States
http://www.envirotechsystems.com

HYDAC Products include: Bladder, Piston Accumulators, Hydraulic and Lubrication Filters, Offline Filters, Filter Elements, Particle Counters, Vacuum Dehydration Systems, Automatic Backflush Water Filters, Coolers, Pressure Transducers and Switches, Ball Valves, and Tube and Hose Clamps, Manifolds and Cartridge Valves. United States
http://www.hydac-na.com

Norman Filter Company has established itself as a premier stainless-steel filter supplier to the oil and gas industry. The products, which can be found worldwide, are supplied to major exploration and production, equipment fabricators, and petrochemical plants. Norman Filters is the trusted name in quality high-pressure filtration assemblies. Norman Filter Company is a certified AS9100 Aerospace filter manufacturer. United States
http://www.normanfilters.com/

SPIFIL® filters/cartridges guarantee protection to industrial machinery, air injection systems, compressors, gas turbines, pipelines, power generation equipment. The experts strive to design, manufacture, and bring technical support to deliver HQ products, in all applications (oil, air, process fluids, gas), under the most diverse operating conditions. United States
http://www.spifil.com

SPX FLOW is a leading global supplier of highly engineered flow components, process equipment and turn-key systems, along with the related after marked parts services, hydraulic equipment, industrial pumps, valves, dehydration and aftermarket services. United States
http://www.spxflow.com

WONIL T&I Co., Ltd has led Gas Industry with its products as Gas Heater, Gas Filter and Gas Treatment System for Governor Station and LNG receiving terminal as well as Power Industry with its products as ASME Ⅲ Pressure Vessel, Debris Filter and related equipment for Korea Hydro & Nuclear Power Co., Ltd.

In addition, they have developed Shell and Tube Heat Exchanger, Pressure Vessel and related equipment for refinery, petrochemical, chemical and environmental fields. and environmental plants.  Korea (South)
http://www.woniltni.co.kr