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عربىTechnical Parameters for Sampling and Dispensing Rooms
The right design depends on the material, the batch size and the risk to product and operator. Your risk assessment and the GMP guideline set the final design. The table gives common references for a typical pharmaceutical powder room.
| Item | Typical reference | Our typical solution |
|---|---|---|
| Room class | ISO 7 or ISO 8, matching the production area for the material | Panels, HEPA Supply Boxes |
| Booth airflow | Unidirectional downflow, often about 0.45 m/s (range ±20 %) at working height | Weighing Booth with HEPA Filter |
| Pressure | Negative to the corridor to contain dust, with airlocks | Airtight envelope, interlocked doors |
| Air handling | Part recirculating booth air, with exhaust or return to capture dust | Booth fan and filter module |
| Surfaces | Smooth, easy to clean, chemical resistant, no ledges | Stainless or HPL faces, coved corners |
| Temperature / humidity | About 18–25 °C / 30–60 % RH, depending on materials | Moisture-stable panels |
| Entry | Personnel airlock, material airlock | Air Shower, Pass Box |
| Cleaning | Dry and wet cleaning with validated methods | Cleanable surfaces and drainage outside the room |
Design points:
- Separate rooms or booths for each material: this prevents cross-contamination between materials.
- Airflow direction: clean air flows down over the operator and the material and then away from the worker's breathing zone.
- Balance placement: weighing balances need stable, vibration-free positions inside the booth.
- Dust control: good capture and a smooth interior make cleaning easier.
- Combustible dust: some powders can form explosive clouds, so explosion protection needs specialist design.
Please also share the density, particle size and hazard of your powders. Fine, light and sticky powders behave differently, and these details help us choose airflow, filters and surfaces that work in practice.
Cross-Border Delivery and Localized Construction Support
Weighing Booths and dispensing rooms combine sheet-metal equipment, fans, filters, electrical controls and cleanroom panels. We therefore deliver them as a coordinated package, with each unit crated and each panel numbered, so your team can install in the right order.
- Process review: we study materials, batch sizes, balance sizes and workflow.
- Drawings: room layout, booth positions, airlocks and wall openings are agreed before production.
- Crating: booths are protected with crates and corner guards, and filters are packed separately.
- Documents: packing list, commercial invoice, certificate of origin and wiring diagrams, with FOB, CFR or CIF terms.
- Installation support: manuals, video guidance or a supervising engineer.
Local construction: a booth needs level floors, adequate power, and clear access for the filters. Wall openings, return air routes and electrical connections should be planned before the walls are closed, and the room should be cleaned before filters are installed.
After installation, a qualified tester normally checks HEPA integrity, airflow velocity, pressure and particle counts, and the plant verifies cleaning methods. Local electrical and safety rules apply, and your engineer remains responsible for approvals.
For larger plants, we suggest a short planning call between your quality lead, the HVAC designer, the contractor and our engineer. Agreeing booth positions, return air routes, airlocks and wall openings on one drawing prevents most site changes. Staged shipments can also be arranged when the building is handed over in phases.
Our staff reply promptly and in plain language, and our designers can adapt standard layouts to your building and your process.
Quality Control and Certification
Sampling and dispensing rooms are inspected for cross-contamination control, dust capture and operator safety. No booth or panel is "GMP certified" on its own, and we do not claim this. We test what we make and provide records.
| Control step | Inspection | Why it matters |
|---|---|---|
| Incoming materials | Stainless sheet, panels, filters, fans, controls | Known quality |
| Booth fabrication | Dimensions, welds or joints, finish | Smooth, cleanable interior |
| Airflow check | Fan, filter, velocity uniformity | Effective protection |
| Electrical check | Controls, alarms, lighting, interlocks | Safe operation |
| Room panels and doors | Flatness, sealing, gasket contact | Tight envelope |
| Packing | Count, labels, crating | Undamaged delivery |
Documents available: material specifications, factory inspection records, filter data, wiring diagrams and, where available, airflow test records for the booth.
Please tell us your target airflow velocity, materials handled and any containment limit. We will confirm what the booth can and cannot do, and we are open about the limits for potent materials. Customer audits and sample approvals are welcome.
Quality teams and auditors often ask how airflow and cleanability are checked. We explain the factory function tests, show typical records, and welcome factory visits or live video tours, where you can watch booths and panels being made. Batch records are kept for each project, so later questions can be traced to production.
We recommend agreeing acceptance tests, such as airflow velocity, pressure and filter integrity, before handover.
Our staff reply promptly and in plain language, and our designers can adapt standard layouts to your building and your process.
We are glad to explain every line of our quotation and to prepare alternative options if you need to adjust the budget.
After-Sales Service and Response Capability
Weighing Booths run all day, and their weak points are filters, fans, seals and controls. Our after-sales service helps you keep airflow stable and surfaces clean, with spare parts that match the original.
- Fast communication: technical questions answered in English by email, phone or messaging.
- Remote diagnosis: photos, videos and readings help us suggest causes.
- Spare parts: HEPA Filters, pre-filters, fans, lights, gaskets, controllers, door parts and panels.
- Modification support: extra booths, new openings or an additional room can be added with updated drawings.
- Engineer visits: by arrangement.
Typical problems:
| Observation | Possible cause | Suggested action |
|---|---|---|
| Low booth airflow | Loaded filter, fan fault | Replace filter, check fan |
| Dust leaks out of booth | Poor airflow balance, damaged seal | Check airflow, replace gasket |
| Cross-contamination found | Cleaning failure, door flow error | Review cleaning, flow and airlocks |
| Light or alarm failure | Electrical fault | Replace part, check wiring |
We suggest daily checks of the airflow display and monthly pre-filter changes, with HEPA filters replaced according to pressure drop and testing.
Booth filters are consumables, so planning is simple: pre-filters change often, and HEPA filters change when pressure drop or testing shows it is needed. Staff should record the airflow reading each day, and a slow fall usually shows a loaded filter. Sending us the readings with the booth name lets our engineers compare them with the project drawings.
Replacement parts are made to the original specification. For urgent cases, we discuss the fastest shipping option and prepare documents in advance.
A spare set of filters, lamps and gaskets at the site helps you act the same day.
Commercial Terms, Warranty and Lifecycle Cost
The room and booth are small compared with the plant, but they protect every batch. One cross-contamination event can cost far more than the whole room, so good design pays back through reduced risk and easier cleaning.
| Item | Our approach |
|---|---|
| Quotation | Itemized by room and booth, with drawings |
| Trade terms | FOB, CFR or CIF, defined in the quotation |
| Payment | Commonly a deposit with balance before shipment or against documents; final terms in the contract |
| Warranty | Defined by component group in the contract |
| Lead time | Given after drawing confirmation |
| Customization | Booth size, materials, finish, airflow options, room layout |
Where cost is decided:
- Number of booths: separate booths for different materials cost more but reduce cross-contamination risk.
- Material: stainless booths resist strong cleaners and last longer.
- Filter replacement: accessible housings and standard sizes lower the running cost.
- Room size: a compact room saves air and energy.
Dust extraction systems, containment isolators, explosion protection, HVAC and permits are outside our supply. Warranty exclusions are stated clearly in the contract.
When comparing quotations, ask each supplier to state booth material, airflow data, filter grade, fan type, controls and packing, not only price. Small differences in these items decide how well the booth performs for years.
We provide itemized quotations and can show alternatives, such as stainless booths for strong cleaning and coated steel for dry products.
We are glad to explain every line of the quotation.
Our staff reply promptly and in plain language, and our designers can adapt standard layouts to your building and your process.
Real Factory Strength for Dispensing Projects
Booths and rooms depend on precise sheet-metal work, filters and panels. Pharma United Co., Ltd., founded in 2006, runs two factories in Kunshan and Qianjiang covering 20,000 m², with more than 60 staff. We are a manufacturer, not a trading company.
| Indicator | Information |
|---|---|
| Experience | 20+ years in cleanroom engineering |
| HPL cleanroom panels | About 250,000 m² per year; China's largest HPL cleanroom panel manufacturer |
| Container shipments | More than 1,000 forty-foot high-cube containers per year |
| Location | Kunshan, about 30 km from Shanghai |
| Product range | Panels, doors and windows, equipment, modular PODs, HEPA products |
| Service | Design, manufacture and installation support |
Why this helps buyers of dispensing rooms: we make Weighing Booths, Laminar Air Flow units, Pass Boxes, Air Showers, doors and panels ourselves, so the booth and the room are designed to fit each other. This reduces site changes and leaks.
Samples, references, factory visits and video tours are available on request. Our engineers answer technical questions directly.
Our designers prepare layouts and detail drawings, our engineers review airflow and interface details, and our production teams run dedicated lines for Weighing Booths, Laminar Air Flow units, doors and panels. Export coordinators prepare packing and documents for shipments to many countries.
Customers in pharmaceutical and nutraceutical fields return for new booths and spare parts, and we can share photos and videos of completed rooms on request. Visitors are welcome at our factory by arrangement.
Our staff reply promptly and in plain language, and our designers can adapt standard layouts to your building and your process.
Sampling & Dispensing Room FAQ
Q1. Why is the dispensing room negative to the corridor?
Powders release dust, and negative pressure keeps that dust inside the room. Airlocks and filtered air protect the neighbors and the material.
Q2. What is a Weighing Booth?
A booth with laminar downflow of HEPA filtered air that protects the material and the operator while powders are weighed or sampled.
Q3. What airflow speed is typical?
About 0.45 m/s, with a tolerance, is commonly used in booths. Your design team sets the value.
Q4. Is a booth enough for potent compounds?
Not always. Highly potent or toxic materials need containment isolators designed to occupational exposure limits.
Q5. Do I need separate booths for each material?
Often yes, or a very strict cleaning and changeover routine. Your risk assessment decides.
Q6. Are your booths GMP certified?
No product is certified alone. Our booths are made with smooth, cleanable surfaces and tested airflow, and we supply records for your qualification.
Q7. How do I get a quotation?
Send your materials, batch sizes, layout and destination country.
Q8. Can existing rooms be fitted with booths?
Often yes, if there is enough height, power and space for filters and return air.
Q9. Do you offer samples?
Yes, samples of panels and booth surfaces can be sent for your own cleaning tests.
Q10. Can you help with layout?
Yes, we prepare layout proposals that your team can adjust.
Our staff reply promptly and in plain language, and our designers can adapt standard layouts to your building and your process.
