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Jumbo 318-343mm Diesel DOC Catalyst System | Mega-Flow Industrial Oxidation Converter for Mining Rigs & Generator Plants
Name analysis
Ceramic DOC: refers to a diesel oxidation catalyst (DOC) that uses cordierite (2MgO·2Al₂O₃·5SiO₂) as a carrier material.
Cordierite: A ceramic...
Name analysis
Ceramic DOC: refers to a diesel oxidation catalyst (DOC) that uses cordierite (2MgO·2Al₂O₃·5SiO₂) as a carrier material.
Cordierite: A ceramic material with a low expansion coefficient, it has excellent thermal stability and low cost characteristics and is currently the most commonly used carrier material for diesel vehicle DOC.
Characteristics
(1) Material characteristics
High temperature resistance: It can withstand continuous high temperatures of 800~1000°C and withstand 1200°C for a short time (but long-term high temperatures may cause sintering failure).
Low thermal expansion coefficient: The thermal expansion coefficient is low (~1×10⁻⁶/°C), and the thermal shock resistance is good, avoiding cracking due to sudden temperature changes.
Porous structure: The surface is coated with γ-alumina (γ-Al₂O₃) to increase the specific surface area and load precious metal catalysts such as platinum (Pt) and palladium (Pd).
(2) Structural characteristics
Honeycomb carrier: usually adopts a honeycomb structure of 400-600 CPSI (pores per square inch) to balance airflow distribution and back pressure
Lightweight: low density (about 2.0 g/cm³), lighter than metal DOC.
(3) Environmental adaptability
Chemical corrosion resistance: good tolerance to diesel sulfur content (under low sulfur fuel conditions), but long-term exposure to high sulfur environment may cause poisoning.
Moderate mechanical strength: more brittle than metal DOC, need to avoid severe vibration or impact.
Function
(1) Core function (oxidation reaction)
CO oxidation: carbon monoxide (CO) → carbon dioxide (CO₂).
HC oxidation: unburned hydrocarbons (HC) → water (H₂O) + CO₂.
SOF conversion: soluble organic matter (SOF, part of particulate matter PM) → reduction of PM emissions.
NO oxidation: partial nitrogen monoxide (NO) → nitrogen dioxide (NO₂), assisting DPF passive regeneration (NO₂ + soot → CO₂ + N₂).
(2) Auxiliary functions
Reducing exhaust odor: oxidizing sulfur and nitrogen compounds to reduce the pungent odor unique to diesel vehicles.
Protecting downstream systems: reducing the impact of unburned HC on the SCR catalyst.
| Advantage | Description |
|---|---|
| Low cost | Cordierite material and manufacturing process are mature, with prices significantly lower than metal DOC and silicon carbide DOC. |
| Lightweight | Lighter than metal DOC, suitable for passenger cars and light commercial vehicles. |
| Low backpressure | Honeycomb structure optimizes airflow, reducing engine power loss. |
| Fast light-off | Catalyst coating can reach operating temperature quickly during cold start (though not as fast as metal DOC). |
| Wide applicability | Complies with mainstream emission standards like Euro 5/6, suitable for most diesel vehicles. |
We strive to make your shopping experience seamless with clear shipping and return guidelines. Please review our policies below.
Returns Policy
We offer a 14-day return policy from the date of delivery. To be eligible for a return:
- Items must be in original condition - unused, unworn, with tags and packaging
- Proof of purchase (receipt/invoice) is required
- Certain items are exempt from returns (see exceptions below)
To initiate a return, please contact us at svipcatcatalytics@gmail.com. We will provide a return shipping address and instructions. Items returned without prior authorization will not be accepted.
Non-Returnable Items:
- Incorrectly ordered car model sizes
- Products damaged due to illegal modifications or improper installation
- Catalysts with welding defects or installation-caused leaks
- Sale items and gift cards
For damaged, defective, or incorrect items, please contact us immediately upon receipt. Refunds are processed within 10 business days after we receive and inspect your return.
Shipping Policy
We utilize DDP air shipping (Delivered Duty Paid) which includes all customs clearance and import taxes:
- UK Delivery: 8-12 business days
- EU Delivery: 12-15 business days
- US Delivery: 15 business days
Tracking information becomes available once your package is transferred to our local courier partners (UPS/FEDEX/DHL). Please note:
- Initial air freight transit does not provide tracking
- Customs inspections may cause unexpected delays
- DDP means no additional fees will be charged upon delivery
For expedited shipping options or any shipping inquiries, please contact us at svipcatcatalytics@gmail.com.
The catalyst reacts based on exhaust temperature. For best performance, install within 50cm of the engine.
• Performance vehicles: High-flow 200cpsi
• Family cars: 400cpsi
• Always select according to your vehicle's original dimensions
• Family car: Less than 125HP/liter
• Performance vehicle: More than 125HP/liter
⚠ SAFETY OPERATION | ENGINE LINKAGE | BACKPRESSURE WARNING ⚠
I. DPF Handling Specifications
Handle with care
▶ Cordierite material is highly brittle - no impact or dropping!
▶ Always support from bottom, never lift by sensors or pipes.
No hammering
▶ Absolutely no hammering, prying or forced installation!
▶ Deformation/cracks will void warranty.
II. System Compatibility Check (Engine + Exhaust)
Mandatory backpressure inspection
▶ Must check before installation:
• Turbocharger oil leakage ✅
• Exhaust pipe dents/blockages (especially catalytic converter) 🔺
• EGR valve sticking or cooler carbon buildup ✅
▶ Abnormal backpressure causes:
→ DPF regeneration failure 🔺
→ Substrate melting/cracking 🔺
Engine health requirements
• Fix oil burning, injector leaks, cylinder misfires
• Installing DPF with existing issues = immediate clogging!
III. Installation Standards
Sealing & Compatibility
• Ensure gaskets are intact + sealing surfaces oil-free (leaks cause pressure fluctuations) 🔺
• Part number must 100% match vehicle/engine model
Sensor Protection
• Prevent wire strain and connector contamination
• Must calibrate differential pressure sensor with diagnostic tool (critical for backpressure monitoring) 🔺
Yes, we do.
1. Vanadium-based (V₂O₅-WO₃/TiO₂)
Active component: Vanadium pentoxide (V₂O₅) on titanium dioxide (TiO₂) with tungsten (WO₃) for thermal stability.
Temperature range:
300–400°C (medium-high), ideal for coal plants, industrial boilers.
Features:
• High NOₓ conversion (>90%)
• Low sulfur resistance (SO₂ oxidizes to SO₃)
• Toxic components require careful disposal
2. Iron-based (Fe-ZSM-5 etc.)
Active component: Iron oxides/ions on zeolite molecular sieves.
Temperature range:
250–450°C (medium-high), weaker at low temps.
Features:
• Better sulfur tolerance
• Non-toxic, easier disposal
• Requires higher temps for efficiency
3. Copper-based (Cu-SSZ-13, Cu-ZSM-5)
Active component: Copper ions on small-pore zeolites.
Temperature range:
200–500°C (wide), excels at 200–300°C.
Features:
• Excellent low-temperature performance
• High resistance to sulfur/water poisoning
• Stable up to 550°C
g/cft.Pt:
g = grams (mass)
cft = cubic feet (1 cft ≈ 28.3 liters)
Pt = Platinum (active component in DOCs)
Definition: Platinum loading per cubic foot of catalyst substrate.
Examples:
• 10g/cft.Pt = 10 grams platinum per cubic foot
• 20g/cft.Pt = higher platinum loading
10g/cft.Pt:
For lower emissions standards (e.g., Euro V) or cost-sensitive applications.
20g/cft.Pt:
For strict standards (Euro VI), heavy-duty vehicles, or extended lifespan requirements.
SDPF (SCR-coated Diesel Particulate Filter) integrates SCR (Selective Catalytic Reduction) and DPF functions into one unit, primarily used to meet strict emissions standards like Euro 6.
We provide multiple options:
• Express: FEDEX, DHL, UPS, TNT (door-to-door)
• DDP: Includes customs clearance + duties + delivery
• Sea/Air freight: To airport/port (customer pickup)
• Small parcel: Cainiao, YunExpress, USPS etc.
Contact our official support team:
| Name | ||
|---|---|---|
| Alison | +44 7516226270 | svipcatalyst@gmail.com |
| Mia | +44 7511723550 | svipcatmia@gmail.com |
| Alvin | +44 7354196446 | svipcatcatalysts@gmail.com |
Dear Friend,
When you choose our catalytic converter, you're not just upgrading your vehicle - you're making a conscious choice for every breath our planet takes. We understand profoundly that this trust you place in us carries far greater weight than the mere physical combination of metal and ceramic.
| Our Unwavering Promise: | ✓ Each converter undergoes rigorous 27-step quality inspection before leaving our facility |
| Expert Support: | ✓ Lifetime complimentary consultation from our technical specialists |
| Customer Care: | ✓ Guaranteed response to after-sales inquiries within 1 business day |
| Quality Assurance: | ✓ Third-party testing and verification accepted |
Life's journey, much like driving, inevitably encounters rough patches. Should any aspect of our transaction cause you dissatisfaction, we kindly ask you to:
1. Pause and take three deep breaths
2. Reach out to your dedicated customer service manager at any time
3. Or connect directly with our founder at: [+44 716926082]
We firmly believe every challenge presents an opportunity for growth. Your feedback will directly inspire us to:
- Enhance one production process each month
- Upgrade our customer service training system every quarter
- Contribute 1% of annual profits to clean air initiatives
At this moment, regardless of whether you ultimately choose our products, please accept our sincere appreciation: Your every consideration for cleaner skies helps make our world more hopeful.
With deepest respect,
[SVIPCAT]
SVIPCAT CATALYTICS LTD.
"Making Every Acceleration Worth Breathing"
