Fume Hood

At Deiiang™, we believe that true safety cannot be automated; it must be crafted. Our authority doesn’t just come from engineering software, but from decades of hands-on manufacturing intuition.

While other manufacturers rely solely on robotic assembly, Deiiang™ implements a proprietary “Tactile Integrity Protocol.” Our veteran technicians—many with over 15 years of experience—manually inspect and hand-finish every interior weld seam. We know from experience that even a microscopic crevice can become a harboring point for corrosion over time. Furthermore, our electrostatic powder coating isn’t just applied; it is cured using a temperature profile we refined through years of field testing, ensuring the finish resists real-world chemical spills, not just laboratory simulations.

When you choose a Deiiang™ Fume Hood, you aren’t just buying a metal box; you are investing in a safety device built with the foresight that only comes from deep manufacturing experience.

Deiiang™ Fumehood Trusted by world-class institutions like Oak Ridge National Laboratory.

As a specialized manufacturer, Deiiang™ offers a comprehensive range of containment solutions tailored for different laboratory risks. Our core lineup includes:

• General Purpose Ducted Fume Hoods: Ideal for standard chemical applications, featuring a bypass design for stable face velocity.
• Polypropylene (PP) Fume Hoods: Specifically engineered for strong acid digestion (like HF acid) where metal hoods would corrode.
• Stainless Steel Fume Hoods: Designed for sterile environments like pharmaceuticals or radiochemistry, offering easy decontamination.
• Explosion-Proof Fume Hoods: Equipped with spark-proof electrical components for working with volatile or flammable solvents.
• Ductless (Filtered) Fume Hoods: Flexible solutions for labs without external exhaust infrastructure.

The choice depends on your chemicals and facility infrastructure.

• Choose Ducted (General/Steel/PP) if you handle large volumes of volatile chemicals, highly toxic substances, or heated processes. They exhaust fumes completely outside the building, offering the highest safety level.
• Choose Ductless only for light-duty tasks with known chemicals that can be effectively trapped by carbon/HEPA filters. They are energy-efficient and portable but require strict filter management. Deiiang™ engineers can analyze your MSDS (Material Safety Data Sheets) to recommend the safest option.

Standard steel hoods, even with coatings, are vulnerable to acid mists over time. Deiiang™ Polypropylene (PP) Fume Hoods are constructed from solid, high-grade welded polypropylene. This material offers superior chemical resistance to strong acids like Hydrochloric (HCl), Sulfuric (H2SO4), and especially Hydrofluoric (HF) acid. We utilize seamless welding technology to ensure there are no metal parts exposed to the airstream, guaranteeing longevity in harsh environments.

Absolutely. Safety is our non-negotiable priority. Deiiang™ Fume Hoods are designed and tested in accordance with major international standards, including:

• ASHRAE 110: For containment performance testing (Made in USA standard).
• EN 14175: For European fume cupboard safety and performance requirements. We perform rigorous factory acceptance testing (FAT) on face velocity and flow visualization before shipping.

For general chemical work, we recommend a face velocity between 0.4 m/s to 0.6 m/s (80-120 fpm) at the working sash height (typically 18 inches/450mm).

• Below 0.4 m/s: May allow contaminants to escape due to room air turbulence.
• Above 0.6 m/s: Can create turbulence around the operator, potentially pulling fumes back into the room (eddy currents). Deiiang™ hoods feature aerodynamic airfoil sills to smooth airflow and maintain containment even at the lower end of this velocity range for energy savings.

Our General Purpose hoods utilize a Constant Air Volume (CAV) bypass system. When the sash (front window) is closed, air enters through a bypass opening above the sash. This ensures that the face velocity remains relatively stable and doesn’t become dangerously high when the sash is lowered, preventing turbulence that could disturb sensitive experiments or instruments.

For general chemical work, we recommend a face velocity between 0.4 m/s to 0.6 m/s (80-120 fpm) at the working sash height (typically 18 inches/450mm).

• Below 0.4 m/s: May allow contaminants to escape due to room air turbulence.
• Above 0.6 m/s: Can create turbulence around the operator, potentially pulling fumes back into the room (eddy currents). Deiiang™ hoods feature aerodynamic airfoil sills to smooth airflow and maintain containment even at the lower end of this velocity range for energy savings.

1. Daily: Check the airflow monitor (if equipped) and ensure the sash moves smoothly.
2. Yearly: Certification by a qualified technician is mandatory (ASHRAE 110 or EN 14175 tests) to verify face velocity and smoke visualization.
3. Components: Inspect the baffle, sash cables/chains, and interior liner for corrosion or cracks. Deiiang™ provides detailed O&M (Operation & Maintenance) manuals with every unit to guide your facility team.

Our General Purpose hoods utilize a Constant Air Volume (CAV) bypass system. When the sash (front window) is closed, air enters through a bypass opening above the sash. This ensures that the face velocity remains relatively stable and doesn’t become dangerously high when the sash is lowered, preventing turbulence that could disturb sensitive experiments or instruments.