Nett - Model M-Series - Diesel Oxidation Catalysts
M-Series DOC's utilize a precious metal diesel oxidation catalyst bonded to a monolithic, 'flow-through' catalyst core. The cores are made of corrugated, high-temperature resistant stainless steel foil packaged into rugged stainless steel containers. M-Series catalysts are used on large displacement engines as well as wherever metal substrates are preferred by customers.
Direct-Fit Catalytic Mufflers
Nett Technologies has direct-fit catalytic mufflers available for thousands of models of construction equipment, forklift trucks and other diesel powered equipment. The pre-designed models are in-stock or can be built and shipped within a few days. Catalytic mufflers are available to replace the original muffler for any diesel application. The M-Series emission control catalyst is built into the muffler and is selected based on the size of the engine. Catalytic mufflers are guaranteed to be a exact-fit replacement for the original muffler. The emissions reduction performance of catalytic mufflers is also guaranteed, provided the engine is well maintained without excessive lube oil consuption.
Universal-Fit Catalytic Converters
Nett® Technologies offers two universal-fit configurations for the D-Series catalytic purifiers, as shown in images below. The welded (one-piece) design is more compact and recommended for space-limited applications. The clamped design allows for easy removal of the center-body (catalyst) for inspection and cleaning, if required.
The M-Series line of Nett diesel exhaust catalytic converters utilizes metallic monolith catalyst supports. The supports are made from a corrugated, high temperature stainless steel foil. Packages of several foil layers are fitted in stainless steel housings and secured in place by stainless steel rings. A special herringbone foil corrugation pattern creates a mixed flow cell structure. Exhaust gases are forced into the turbulent flow regime resulting in better contact between gas and catalyst, enhanced mass-transfer conditions, and higher conversion efficiency. Selected physical properties of Nett metallic monoliths are listed in the table below.
The catalyst is deposited onto the foil prior to forming the substrate. A special foil washcoating process provides unequalled control of washcoat uniformity, adhesion, and efficient catalyst use. Thick washcoat concentrations in cell corners, which are inherent for other designs of metallic substrates, completely disappear with the precoated foil technology.