Caterpillar (CAT) 3516 & 3520 Removable Exhaust Insulation Blankets

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Engineered Thermal Protection for Caterpillar 3516 & 3520 Engines

The Caterpillar 3516 (16-cylinder, 69-liter) and CAT 3520 (20-cylinder, 86-liter) engines represent the global benchmark for heavy industrial power generation. However, their high-displacement combustion cycles generate massive exhaust heat loads requiring specialized Caterpillar exhaust insulation and protective shielding:

• Extreme Exhaust Temperatures: CAT 3516B/C/E diesel exhaust gas temperatures range from 850°F to 1,050°F (454°C to 565°C), while CAT G3516 and G3520 lean-burn gas engines produce manifold temperatures up to 1,200°F (649°C).
• Radiant Heat Within Enclosures: Uninsulated or poorly covered exhaust manifolds radiate thousands of BTUs into enclosed generator canopies, elevating intake air temperatures, reducing engine volumetric efficiency, and degrading sensitive alternator wiring, sensors, and ECM controls. Proven Caterpillar genset insulation and CAT generator insulation drastically lower ambient temperatures.
• Personnel Burn Hazard: Bare exhaust piping and turbine casings represent severe burn hazards for operators and technicians. ATC blankets guarantee surface touch temperatures below 140°F (60°C) compliant with OSHA 1910.147.
• Fire Risk Mitigation: In enclosed gensets and marine engine rooms, high-pressure fuel lines, hydraulic hoses, and lube oil circuits operate near hot exhaust manifolds. ATC’s liquid-impermeable silicone and PTFE jacketing prevents flammable hydrocarbon mists from contacting red-hot steel surfaces, meeting SOLAS marine safety standards.

CAT 3516 & 3520 Component Blanket Kit Breakdown

Advanced Thermal Corp. manufactures complete, component-mapped removable insulation blanket kits for both dry-manifold and water-cooled CAT 3500 series engine architectures. Each blanket section is CAD-patterned for an exact mechanical contour fit:

CAT Component	Kit Architecture & Coverage	Engineering & Maintenance Benefit
CAT 3516 Exhaust Insulation & Manifold Covers	Modular multi-piece segmented blankets delivering precision CAT exhaust manifold insulation for cylinder head exhaust ports, exhaust log sections, and transition elbows. Available for standard 8-piece and 16-piece configurations.	Allows selective removal of individual cylinder blankets during valve lash adjustments or injector service without removing the entire manifold insulation system.
CAT Turbocharger Insulation Blankets	Precision two-piece split-shell blankets providing comprehensive Caterpillar turbo insulation and CAT turbocharger insulation blankets wrapping turbine hot housings and wastegate housings for twin-turbo and quad-turbo CAT configurations.	Contains extreme localized turbo heat, optimizes turbo spool-up velocity by preserving exhaust gas thermal energy, and protects adjacent wiring harnesses.
Exhaust Bellows & Expansion Flex Covers	Multi-layer flexible expansion jackets specifically engineered to bridge the thermal growth and high-vibration gap between the manifold and rigid exhaust ducting. High-durability CAT exhaust insulation blankets prevent heat escape at flex joints.	Eliminates blanket tearing caused by cyclic thermal expansion and high engine vibrations while preventing heat leaks at flex joints.
Exhaust Crossovers & Y-Collector Blankets	Custom-contoured blankets insulating center crossover piping, exhaust merge collectors, and downstream discharge elbows leading to the silencer.	Maintains consistent thermal gradient across the exhaust tract and prevents hot spots inside the generator package enclosure.
SCR & Aftertreatment Insulation Blankets	Full-coverage insulation blankets for Selective Catalytic Reduction (SCR), Diesel Oxidation Catalysts (DOC), and Diesel Particulate Filters (DPF).	Retains critical exhaust heat required for catalyst activation and Tier 4 Final / Stage V emissions compliance while protecting enclosure personnel.

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Technical Specifications & Material Construction

Every ATC Caterpillar generator insulation blanket and Caterpillar engine insulation kit is built to withstand high continuous vibration, thermal cycling, and chemical exposure typical of industrial power plants, offshore oil platforms, and data center facilities:

Design Property	Standard Duty (Diesel Standby)	Severe Duty (Gas / Continuous CHP)
Maximum Operating Temperature	1,000°F (538°C) Continuous	1,200°F (649°C) Continuous / 1,800°F Excursion
Inner “Hot Face” Lining	18 oz/yd² silicone-impregnated woven fiberglass or stainless wire-inserted fiberglass	304 / 316 Stainless Steel knitted wire mesh or high-silica cloth
Insulation Core Layer	1.0″ Mechanically needled E-glass felt (9-11 lbs/ft³ density, ASTM C1086)	1.5″ – 2.0″ High-density fiberglass felt or encapsulated aerogel composite
Outer “Cold Face” Jacketing	17 oz/yd² Grey silicone-coated fiberglass (chemical, water, and oil resistant)	PTFE / Teflon®-coated fiberglass or aluminized Kevlar® heat barrier
Fastening Hardware & Closures	304 Stainless steel lacing hooks, quilting pins, and annealed tie-wire	Quick-release stainless spring latches, D-rings, and high-temp Nomex®/SS hook-and-loop flaps
Outer Touch Temperature	< 140°F (60°C) per OSHA 1910.147 guidelines	< 130°F (54°C) / Meets SOLAS < 428°F (220°C) criteria
Environmental & Safety Rating	Non-combustible core, flame retardant per UL 94 V-0, vibration certified	Oil-impermeable, zero smoke generation, ASTM E84 Class A flame spread

Comprehensive Caterpillar Engine Model Coverage Matrix

ATC maintains an extensive library of CAD templates and production patterns across Caterpillar diesel, gas, and dual-fuel engine platforms. We supply exact-fit insulation blankets for the following CAT models:

Caterpillar Engine Series	Target Blanket Solutions & Models	Key Blanket Applications & Hardware
CAT 3516 Series	Complete CAT 3516 insulation, CAT 3516 exhaust insulation, and CAT 3516 insulation blankets for CAT 3516, CAT 3516B insulation, CAT 3516C insulation, and CAT 3516E insulation packages (1,600 ekW – 2,500 ekW).	Full manifold sets, dual/quad turbo covers, exhaust flex bellows, and Tier 4 SCR catalyst blankets.
CAT 3520 Series	Engineered CAT 3520 insulation covers, CAT G3520 insulation, CAT G3520 exhaust insulation, and CAT G3520 insulation blankets for CAT 3520, 3520C, 3520E, G3520, G3520C, and G3520H (2,000 ekW – 3,000 ekW).	High-temp natural gas manifold wraps, large-frame turbo blankets, and high-temp crossover piping covers.
CAT 3512 & 3508 Series	Custom CAT 3512 insulation, CAT 3512 exhaust insulation, and CAT 3512 insulation blankets along with CAT 3508 insulation and CAT 3508 exhaust insulation (1,000 ekW – 1,750 ekW).	8-cylinder and 12-cylinder exhaust manifold kits, turbo wraps, and exhaust silencer transition blankets.
CAT C175 Series	Heavy-duty CAT C175 insulation, CAT C175 exhaust insulation, CAT C175 generator insulation, and CAT C175 insulation blankets for CAT C175-16 and C175-20 (3,000 ekW – 4,000 ekW).	Massive V-16 and V-20 high-output manifold shields, quad-turbo housings, and acoustic/thermal wraps.
CAT C-Series Heavy Duty	Full line including CAT C15 insulation, CAT C15 exhaust insulation, CAT C15 insulation blankets, CAT C18 insulation, CAT C18 exhaust insulation, CAT C18 insulation blankets, CAT C27 insulation, CAT C27 exhaust insulation, CAT C32 insulation, CAT C32 exhaust insulation, and CAT C32 insulation blankets.	Single and dual turbo blankets, integrated manifold shields, and Tier 4 emissions canister insulation.
CAT Gas Engines (G3500 & G3600)	High-temp CAT gas engine insulation, Caterpillar gas engine insulation, CAT gas generator insulation, CAT gas genset insulation, CAT G3500 insulation, CAT G3512 insulation, CAT G3516 insulation, CAT G3600 insulation, CAT G3612 insulation, CAT G3616 insulation, CAT G3616 exhaust insulation, and Caterpillar gas engine exhaust blankets.	Severe-duty 1,200°F continuous insulation jackets for continuous-duty natural gas pipeline compressors and CHP units.

Why Choose ATC Removable Blankets Over Permanent Cladding?

Traditional rigid sheet metal cladding or hard-coat insulation creates severe maintenance bottlenecks on high-hour Caterpillar generator sets. ATC removable blankets solve these operational challenges:

• Tool-Free Removal & Rapid Reinstallation: Our quick-release stainless steel spring latches and lacing systems allow technicians to remove blankets in minutes for routine cylinder head service, valve lash checks, or injector testing, and reinstall them immediately without requiring skilled insulation contractors.
• 100% Reusable Design: Unlike hard lagging that gets crushed or discarded during teardowns, ATC blankets are engineered for 50+ removal/reinstallation cycles with zero loss of thermal insulating integrity.
• Integrated Sensor & Pyrometer Access: Every blanket kit features reinforced, silicone-finished cutouts for thermocouple probes, pyrometers, oxygen sensors, and pressure taps, ensuring critical diagnostic instrumentation remains fully accessible.
• Vibration and Thermal Fatigue Resistance: Reciprocating engines subject exhaust components to intense cyclical vibration. ATC’s flexible quilt-stitched construction absorbs vibration without cracking or crumbling, ensuring multi-year service life.

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Primary Market Applications for CAT 3516 & 3520 Insulation

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