Fresh-air intakes fitted with standard particle filters still admit molecular gases (H₂S, SO₂, Cl₂, NOx), rapidly corroding copper/silver circuitry in mission-critical DCS, PLC, and server racks.
YONGFAN PSA series integrates G4 particulate pre-filtration, dual-bed gas-phase chemisorption (PK12-PCB / PK12-CPB), F8 post-filtration, and 2,000 Pa structural casings with <1% leakage at 1,000 Pa.
Selecting F8/H13 filters expecting corrosive gas removal. Particles are captured, but H₂S and Cl₂ gases pass unhindered into server racks.
Sizing the chemical unit from total room recirculation flow rather than outdoor pressurization make-up oversizes the unit and drains media needlessly.
Using standard activated carbon on acidic SO₂ or NOx without chemical impregnation leads to rapid breakthrough and zero capture of target species.
Poorly sealed AHU panels leak raw outdoor gas around chemical beds under negative pressure, defeating the chemical stage entirely.
Arrestance 90–95% (MERV 7). Initial resistance 37 Pa, final limit 174 Pa. Protects chemical media granules from coarse dust and airborne debris accumulation.
Two sequential gas-phase beds engineered with KOH (PK12-PCB) or KMnO₄ (PK12-CPB) media. Delivers 99.5% single-pass removal for target acidic and oxidizing gases.
Arrestance 99% (MERV 13). Initial resistance 75 Pa, final limit 300 Pa. Ensures zero media dust migrates downstream into precision control rooms.
Tested per ISO 10121-1 gas-phase media standards.
| Model | Airflow (m³/h) | Motor Power (kW) | Available ESP (Pa) | Dimensions (D × H × W mm) | Unit Weight (kg) |
|---|---|---|---|---|---|
| PSA-102 | 850 | 0.75 | 250 | 2500 × 830 × 670 | 365 |
| PSA-202 | 1,700 | 1.5 | 250 | 2500 × 830 × 670 | 371 |
| PSA-302 | 2,550 | 2.2 | 250 | 2800 × 1130 × 670 | 441 |
| PSA-402 | 3,400 | 2.2 | 250 | 2800 × 1430 × 670 | 490 |
| PSA-502 | 4,250 | 3.0 | 250 | 2800 × 1730 × 670 | 591 |
| PSA-304 | 5,100 | 4.0 | 250 | 2800 × 1130 × 1270 | 726 |
| PSA-404 | 6,800 | 5.5 | 250 | 3000 × 1430 × 1270 | 835 |
| PSA-604 | 10,200 | 7.5 | 250 | 3000 × 2030 × 1270 | 1,011 |
| PSA-506 | 12,750 | 7.5 | 250 | 3000 × 1730 × 1870 | 1,580 |
| PSA-606 | 15,300 | 11.0 | 250 | 3000 × 2030 × 1870 | 1,724 |
| PSA-608 | 20,400 | 15.0 | 250 | 3200 × 2030 × 2470 | 2,251 |
| PSA-808 | 27,200 | 15.0 | 250 | 3200 × 2630 × 2470 | 2,580 |
| PSA-810 | 34,000 | 22.0 | 250 | 3200 × 2670 × 3110 | 3,153 |
*Top inlet/outlet adds 600 mm depth. Heating/cooling coils add approx 800 mm. Dual fans add 500 mm. Higher airflow up to 68,000 m³/h is covered by PSA-PG Series.
The PSA cabinet can be configured with functional sections tailored to local environmental challenges:
Specify outdoor ventilation and positive-pressure make-up volume needed for the space.
List normal/peak concentrations of H₂S, SO₂, Cl₂, NOx, NH₃, and VOCs around intake.
Target ISA S71.04 Class G1 mild severity level or client-specific silver/copper reactivity.
Confirm DCS/PLC communication, toxic gas sensor inputs, and motorized damper signals.
Send available airside data. YONGFAN engineers will calculate media loading, contact time, and provide GA drawing submittals.
Housings feature double-skin cold-rolled steel with 30 mm PU insulation, verified for zero bypass around chemical modules.
Each fan and motor assembly is bench-verified for airflow, static pressure, current draw, and vibration limits per GB/T 14294.
Chemical media batches undergo chemical assay for active KOH / KMnO₄ content, moisture, and bulk density before filling.
Designed around petrochemical blast-resistant building ventilation guidelines and international ISO quality standards.
The standard PSA family covers 850 to 34,000 m³/h across 13 primary and 23 total configurations. For higher airflow up to 68,000 m³/h, select PSA-PG.
The PSA-404 is rated at 6,800 m³/h, 5.5 kW, and 250 Pa available external static pressure.
H₂S, SO₂, Cl₂, NOx, and VOCs using potassium hydroxide (PK12-PCB) or potassium permanganate (PK12-CPB) chemisorption media.
Yes. The train includes a G4 pre-filter (MERV 7) and an F8 secondary filter (MERV 13) alongside the two gas-phase beds.
Double-skin insulated casing documented at <1% leakage at 1,000 Pa with a 2,000 Pa structural pressure rating.
Standard service life is documented as 1 year under typical industrial challenge levels; actual life depends on site gas loading.
PSA is for incoming fresh air. For contaminated industrial process exhaust discharge, select WGP Series.
For indoor server room recirculation without outdoor air, review CA or DBS Units.
When high-volume CCRs need 34,000 to 68,000 m³/h per unit, specify PSA-PG High-Airflow.
PSA does not replace blast isolation valves or fire dampers at the blast-wall boundary; it mounts downstream in the treated air path.
Send your required fresh-air airflow, site gas analysis, and plant-room interface constraints. YONGFAN engineers will provide duty-matched schedules and GA drawing submittals.
