Air Pressure Stabilisers

APS®-100

Select a product information:

- Unique blade release system for superior maintenance.
- SteriTouch® antimicrobial protection as standard.
- Quiet day-to-day operation.
- Low maintenance.
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The patented APS-100 Air Pressure Stabilisers has been purpose-designed for narrow wall installation within clean environments and healthcare facilities.

The VARI-centric® balancing system accurately controls the differential air pressure between adjacent rooms, and the blades close fully as soon as the pressure differential drops below the required level.

This diverts the airflow to pass through an open door forcing back airborne contamination without the need to alter the air extract supply.

Positive pressure of the Operating Theatres to protect them from the ingress of infectious agents passing through the open doors, by providing high air volume rates, is a well-established principle of hygiene and infection control, forming the fundamental principles on which Health Technical Memorandums HTM 03-01 & HTM 2025 are based.

Following the philosophy of HBN 4 Supplement 1: Isolation facilities in acute settings, Bespoke Air Pressure Stabilisers are utilised to control the pressure differential between the Corridor and Isolation room. Within Cleanrooms they are used to facilitate the cascade of air pressures to maintain a sterile environment where facilities are conforming to ISO 14664-1 and BS 5295.

Apreco VARI-centric® Bespoke Air Pressure Stabilisers and associated products are supplied as standard with SteriTouch® paint finish, utilising silver technology – which is already used extensively within the healthcare sector as an excellent anti-microbial protection in conjunction with good hygiene practices. SteriTouch® is extremely effective in helping to protect against harmful bacteria including MRSA, Ecoli, salmonella and C-diff

Our Bespoke APS® Air Pressure Stabilisers can be designed to meet your needs, these include Ceiling and thin wall/door mounted units.
Operating Theatres

The VARI-centric® Bespoke Air Pressure Stabilisers are utilised to maintain the positive pressurisation of operating theatres and isolation rooms, to protect them from the ingress of infectious agents passing through open doors by providing high air volume flow rates is a well-established principle of hygiene and infection control.

Apreco have been acknowledged for their assistance in contributing to Health Technical Memorandum (HTM 03-01) which supersedes HTM 2025. They have also assisted with the validation of Isolation Room design following Health Building Notes (HBN 4 : Supplement 1).

Clean Rooms

Apreco’s leading VARI-centric® range of Bespoke Air Pressure Stabilisers are designed to maintain a sterile environment. Our range is utilised in the cleanrooms of pharmaceutical, healthcare and commercial companies for effective room differential pressure control.

All cleanroom areas should be either classified or non-classified. All classified areas should conform to an applicable standard. This standard is dependant upon geographic location and usage.

Isolation Rooms

When following the guidelines of HBN4 Supplement 1: Isolation facilites in acute settings the VARI-centric Bespoke Air Pressure Stabilisers are utilised to maintain the positive pressurisation lobby ensuring that air from the corridor does not enter the isolation room, and that air from the room does not escape into the corridor. This basic but effective design enables the suite to be used for both source and protective isolation without the need for switchable ventilation or special training for staff. Importantly it also provides safe isolation for those patients whose exact condition is unknown.
Metric Selection

The method below will give you an indication of the size of unit required for a given volume flow-rate at a given pressure.

Use Table A to calculate the total length of blade required, and then divide it into sections of equal length using values from Table B.

Example:
Selecting a Bespoke Air Pressure Stabiliser capable of transferring 220 l/s (0.22 m3/s) @ 5 Pa.

Stage 1:
220 x 9.04 = 1988.8mm of total blade length. Where: 220 = Volume in l/s and 9.04 = Factor from Table A relating to 5 Pa.

Stage 2:
Divide the calculated total blade length into equal lengths using one of the standard blade lengths from Table B.

Consideration should be made regarding any physical restrictions that the building may impose before selecting the blade length for the unit.

Total calculated blade length of 1988.8 divided by 4 blades = 497.2 mm.

Rounded up to the nearest standard blade increment from Table B gives you 4 x 500 blades.

Table A (Factors)

Pa Factor Pa Factor

5 9.04 17 4.90

10 6.40 20 4.52

15 5.22 25 4.04

Table B (Blade Lengths in mm)

200 325 450 575 700

225 350 475 600 725

250 375 500 625 750

275 400 525 650

300 425 550 675
X-Ray Protection Baffle Screen

Apreco provide purpose designed lead-lined screens mounted in front of the stabiliser to protect personnel from harmful X-rays.

Laser Protection Screen

Apreco provide purpose designed screens mounted in front of the stabiliser to protect personnel from harmful laser-rays.

Protective Guard

The guards are designed to offer protection to Bespoke Air Pressure Stabilisers when fitted in areas where they may be classed as vulnerable to accidental damage.

Fumigation Sealing Plate

Designed to seal against one client nominated side of a Bespoke Air Pressure Stabiliser, these plates are typically required when a facility requires one or more of its rooms/areas to undergo a fumigation process, to protect adjacent rooms/areas from the ingress of fumigant.

Baffle Screen

The Baffle Screen has been designed to divert the air from the Bespoke Air Pressure Stabilisers reducing jetting whilst allowing the Bespoke Air Pressure Stabilisers to function correctly.

Light Baffle

The Light Baffle has been designed to block the light from one room entering another. Used in applications where protected rooms must be kept dimly lit.
APS® 100 (Narrow Wall Air Pressure Stabiliser) Data Sheet

Category: Data Sheets • Filetype: pdf

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APS-100 (Narrow Wall Air Pressure Stabiliser) Drawing

Category: Drawings • Filetype: pdf

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APSX (Standard Air Pressure Stabiliser) O&M

Category: O&M Manuals • Filetype: pdf

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