No.2.8–6
A drive listed. Confirm selected size, speed, motor, mounting and rotation/outlet orientation.
Read the sourceEQUIPMENT / EQUIPMENT FAMILY
Pengxiang 4-73 centrifugal ventilation fan family
Single-inlet backward-curved fan family with several size/drive options: require a curve at the required airflow and pressure before selecting.
From Zhejiang Pengxiang HVAC Equipment Co., Ltd.
Individual product research · HVACDeck Editorial · Sources checked 2026-10-11
Use a selected fan curve to turn the family envelope into a duty point
Pengxiang’s original 4-73 page describes centrifugal ventilation fans for factories and large buildings. It gives broad impeller, airflow, pressure and temperature limits, then separates available drives by fan size and identifies optional accessories. This is a family overview, not a table matching each size and speed to one operating point.
Both source photographs were inspected. They show the scroll casing and inlet; one also exposes a belt/drive guard and base assembly. The photographs illustrate a configuration without identifying a legible rating plate, dimensions, speed, motor power or measured performance.
A useful selection begins with required airflow, the specified static/total pressure basis and air conditions. Ask for the selected size/speed curve, absorbed-power data and installation drawing. A series maximum cannot tell a buyer which fan will meet those conditions efficiently and within its operating limits.
Published parameters and their scope
This is an equipment family; its range does not identify one orderable configuration.
- Family designation
- 4-73
Swipe the table, or focus it and use arrow keys, to read the conditions and sources.
| Parameter | Published value | Conditions and evidence |
|---|---|---|
| Published configuration | Single inlet; backward-curved centrifugal impeller | Supplier description of the family; exact selected wheel/material remains an order item. Source |
| Impeller range | 280–2000 mm | Series range, not a dimension for every configuration. Source |
| Airflow envelope | 1000–220000 m³/h | No model/speed-specific curve given; extremes do not imply pressure capability at the same point. Source |
| Pressure envelope | Up to 3000 Pa | Family upper statement; selected-duty static/total basis and curve need confirmation. Source |
| Published temperature range | −20°C to 80°C | General family statement; hazardous/corrosive or hot-process duty is not automatically covered. Source |
Selection and application review
Pair airflow and pressure on the same selected curve
The family’s upper airflow and pressure numbers cannot be combined into a promised operating point. Request a curve for the exact fan size, rotation and speed, with the pressure definition and air density/test conditions identified. Include the duty and operating range, rather than sending only a catalogue maximum.
Provide required airflow, duct/filter/process resistance, air temperature and other relevant air properties. Ask the supplier to identify absorbed shaft power, motor input assumptions, efficiency and acceptable operation around the selected point. Its general high-efficiency/low-noise description is not a numerical efficiency or acoustic guarantee.
Drive options follow size and affect the supply scope
The original page assigns drive letters by fan-number ranges. These identify available configurations, not a motor-power or speed table. The buyer should receive a drawing and drive schedule defining what the offered assembly actually includes.
No.8–12
C or D drive listed. Request the actual transmission arrangement, guards, bearings/coupling or belt schedule and service access.
Read the sourceNo.14–20
B, C or D drive listed. Define the complete base/drive assembly and inspection responsibilities in the offer.
Read the sourceOrder accessories explicitly instead of assuming they are included
The source offers flexible inlet/outlet connections and spring-type vibration isolation, with inlet adjustment, bearing temperature/vibration monitoring and impeller-cleaning options also mentioned. Their availability does not establish that every offer includes them.
Agree the accessories and their mechanical/electrical interfaces, control/monitoring points and operating requirements. The supplier’s source photos do not replace the bill of materials. Ask how the selected support, isolation, flexible connections and guard arrangement will be installed and maintained at the actual site.
Hazardous-atmosphere use needs an approved configuration
The page describes an explosion-protected variant using an explosion-protected motor and aluminium-alloy impeller. That wording does not provide a gas/dust category, zone, temperature class or complete-assembly approval. It cannot establish suitability for a particular hazardous atmosphere.
If the process requires that duty, give the applicable site requirements to the responsible designer and supplier and obtain a specifically assessed configuration with the relevant documents. Likewise, smoke-exhaust certificates elsewhere in a corporate gallery do not automatically approve the ordinary 4-73 ventilation family for a fire application. Stay within the selected assembly’s documented intended use.
Separate fan-only efficiency, vibration and complete-system results
The national standards issuer lists Pengxiang as a drafting participant in industrial-fan balance/vibration and fan-only efficiency-classification standards. Participation is a corporate technical record, not an assigned grade for this family. Request the actual selected fan’s test results and acceptance basis.
The official gallery’s displayed test-system recognition has a printed validity ending in 2024; a 2022 laboratory-comparison document is also historical. Neither is a new model report. Ask for current test-method/range evidence where it matters and check the model, speed, configuration and measurement basis in the report.
Duty and power
Match flow/pressure, speed, density and power/efficiency definition to the offered fan and drive.
Balance and vibration
Agree the assembly, operating condition, measurement arrangement and acceptance criteria, with traceable results.
Noise and installation performance
Request a defined acoustic metric and test condition; establish installed-system acceptance separately from catalogue fan-only data.
Prepare an installation and handover brief
No model-specific outline, weight, flange schedule, electrical diagram or warranty duration was established in the reviewed 4-73 page. Request these for the selected assembly before foundations, duct interfaces or electrical work are finalised.
Resolve the selected duty
Approve the size/speed curve, operating range, power and drive, air/process conditions and required special-duty evidence.
Resolve the mechanical interfaces
Approve rotation/outlet orientation, inlet/outlet dimensions, base/support/isolator drawing, access, guards and included accessories.
Resolve acceptance and support
Agree inspection and commissioning records, operating/maintenance instructions, identifying details, spare parts and written warranty/service coverage.
Sources and review scope
Compiled by HVACDeck Editorial. Source review identifies what the publication states; it is not an independent performance test or certification.
- Pengxiang original 4-73 detail and both source photosChecked 2026-10-11 · Full family envelope, drive-by-size and option wording read. Photos do not establish selected model ratings.
- Official qualification galleryChecked 2026-10-11 · Dated test-system/laboratory/management images inspected; no current selected 4-73 report established.
- Original balance/vibration standards recordChecked 2026-10-11 · GB/T41973-2022 issuer record and named corporate drafting role; no model conformity result.
- Original fan-only efficiency standards recordChecked 2026-10-11 · GB/T43080.3-2023 covers fans without drives at maximum operating speed; not installed-system efficiency proof.
Editorial method and corrections · Report a detail with this page URL
Turn the evidence into an enquiry
Send the manufacturer your required duty, installation conditions and the unresolved items identified in this brief.