Pass Box: Definition, Specifications & Working Principle

What is a Pass Box?

A pass box is a small chamber that helps move materials from one room to another room. It keeps both rooms clean and safe. This box is very important in places like medicine factories and hospitals.

Think of it like a safe window between two rooms. You put something in from one side and take it out from the other side. But it does not let dirt or germs go through.

Instech Pharma makes high quality pass boxes for different industries. We help keep your production areas clean and safe.

Why Do We Need Pass Box?

When you work in clean rooms you cannot just open doors and move things. Opening doors brings in dirty air. A pass box solves this problem.

Here are some reasons why pass boxes are needed:

• Stops Dirt from Entering – The box keeps dust and germs away from clean areas.
• Saves Time – Workers can move things quickly without worry.
• Follows Rules – Medicine and food companies must use pass boxes to follow safety rules.
• Protects Products – Your products stay pure and safe from outside air.

Types of Pass Boxes

There are different types of pass boxes for different needs:

Static Pass Box

This is the basic type. It has two doors that cannot open at the same time. When one door opens the other door stays locked. This type does not have any fan or filter inside.

Dynamic Pass Box

This type has a fan and filters inside. The fan blows clean air down from the top. This air pushes away any dust or germs. It gives better protection than static pass box.

Sampling Pass Box

This type is used when you need to test materials. It has special openings where you can take samples without opening the main doors.

Main Parts of a Pass Box

Every pass box has these important parts:

• Body – The outer box is made from stainless steel. Steel does not rust and is easy to clean.
• Two Doors – One door opens to the clean room. The other door opens to the less clean room. Both doors have rubber seals to stop air from leaking.
• Interlock System – This is a safety lock. When you open one door the other door gets locked. You cannot open both doors together.
• UV Light – Many pass boxes have UV lights on the ceiling. This light kills germs after you transfer materials.
• HEPA Filter – In dynamic pass boxes there is a HEPA filter. This filter catches 99.99% of dust and germs.
• Glass Window – A clear glass window lets you see inside the box.

Pass Box Specifications

Here is a table showing common specifications:

These numbers can change based on what you need. Instech Pharma can make custom sizes for your factory.

How Does a Pass Box Work?

The working of pass box is simple and safe. Let me explain step by step:

Step 1: Put Material Inside

A worker from the less clean room opens the outer door. He puts the material or product inside the pass box. Then he closes the door.

Step 2: Interlocking

When the outer door closes it locks the inner door. This means no one can open the inner door yet. This prevents both rooms from connecting.

Step 3: Cleaning Time

After the outer door closes the UV light turns on. The light stays on for 2 to 5 minutes. This kills any germs on the material surface. In dynamic pass boxes the fan also runs to blow clean air.

Step 4: Take Out Material

After cleaning time a worker from the clean room opens the inner door. He takes out the material. The outer door stays locked during this time.

Step 5: Ready for Next Use

When the inner door closes everything resets. The pass box is ready for the next transfer.

This whole process keeps both rooms separate and safe.

Where Are Pass Boxes Used?

Pass boxes are used in many industries:

• Pharmaceutical Companies – Medicine factories use pass boxes to move raw materials and finished products. This keeps medicines safe from germs.
• Hospitals – Operation rooms and ICU units use pass boxes to transfer tools and medicines.
• Food Industry – Food processing units use them to move ingredients and packed food.
• Research Labs – Science labs use pass boxes to transfer samples and chemicals.
• Electronics Manufacturing – Computer chip factories need very clean rooms. Pass boxes help maintain this cleanliness.
• Instech Pharma provides pass boxes to all these industries with proper certificates.

Benefits of Using Pass Box

• Using a pass box gives many advantages:
• Keeps Areas Clean – The main benefit is keeping clean rooms actually clean.
• Saves Money – By preventing dirt you save money on cleaning and waste.
• Easy to Use – Anyone can learn to use a pass box in minutes.
• Long Life – Stainless steel pass boxes last for many years.
• Meets Standards – Pass boxes help you pass government inspections.
• Worker Safety – It protects workers from harmful chemicals or germs.

Important Things to Remember

• When you use a pass box keep these points in mind:
• Never Force Doors – If a door does not open it means the other door is open. Wait for it to close.
• Clean Regularly – Wipe the inside of pass box with cleaning solution every day.
• Check UV Light – Replace UV bulbs every 6 to 12 months. Old bulbs do not work well.
• Change Filters – HEPA filters should be checked every year and changed when needed.
• Train Workers – Make sure all workers know how to use the pass box correctly.
• Keep Records – Write down when you clean the pass box and when you change parts.

How to Choose the Right Pass Box

• When buying a pass box think about these questions:
• What size materials will you transfer? Get a box big enough for your largest item.
• Do you need static or dynamic type? If you work with very sensitive products choose dynamic.
• What is your room classification? Higher class clean rooms need better pass boxes.
• Do you want manual or automatic doors? Automatic doors are easier but cost more.
• Do you need any special features? Some boxes have alarm systems or special locks.
• Instech Pharma has experts who can help you choose the perfect pass box for your needs.

Installation and Maintenance

Installation

A pass box is installed in the wall between two rooms. The installation team cuts the wall to fit the box. Then they seal all gaps with special material. They connect the power for lights and fans. After installation they test the interlock system and all features.

Maintenance

Good maintenance makes your pass box last longer:

• Clean the inside daily with disinfectant
• Clean the glass window so you can see inside
• Test both doors every week to check interlock
• Monitor UV light hours and replace bulbs on time
• Check door seals for any damage
• Keep a logbook of all maintenance work

Instech Pharma offers maintenance services for all our pass boxes.

Safety Guidelines

Follow these safety rules when using pass boxes:

• Do not put your hands inside when UV light is on
• Do not overload the pass box with heavy items
• Always close doors properly
• Report any problem immediately
• Do not try to open both doors together by force
• Wear proper gloves when handling chemicals through pass box

Conclusion

A pass box is a simple but very important piece of equipment. It helps transfer materials safely between different areas. By using a pass box you can keep your clean rooms actually clean. This protects your products and helps you follow safety rules.

Whether you need a basic static pass box or an advanced dynamic model Instech Pharma has the right solution for you. We make pass boxes with best quality materials and latest technology.

Our pass boxes come with proper testing certificates and warranty. We also provide installation and training support. With years of experience in pharmaceutical equipment Instech Pharma understands what you need.

If you want to know more about pass boxes or need help choosing one please contact Instech Pharma today. We are here to help make your workplace safer and cleaner.