APSX
• Unique blade release system for superior maintenance. 
• SteriTouch® antimicrobial protection as standard.
• Quiet day-to-day operation. 
• Low maintenance.

The patented VARI-centric® range of Pressure Stabilisers is purpose-designed for clean environments, such as Operating Theatres, Isolation Rooms and Cleanrooms to control airborne contamination by controlling room pressure differentials. 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, 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® 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

Operating Theatres

Operating TheatresThe VARI-centric® 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 supercedes HTM 2025. They have also assisted with the validation of Isolation Room design following Health Building Notes (HBN 4 : Supplement 1).

Clean Rooms

Clean RoomsApreco’s leading VARI-centric® range of 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

Isolation RoomsWhen following the guidelines of HBN4 Supplement 1: Isolation facilites in acute settings the VARI-centric 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 the divide it into sections of equal length using values from Table B.

Example:
Selecting a Pressure Stabiliser capable of transferring 310 l/s (0.31 m3/s) @ 5 Pa.

Stage 1:
310 x 7.35 = 2278.5 mm of total blade length.Where: 310 = Volume in l/s and 7.35 = 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 2278.5 divided by 4 blades = 569.25 mm.

Rounded up to the nearest standard blade increment from Table B gives you 4 x 575 blades.

Table A (Factors)

PaFactorPaFactorPaFactor
39.49154.25352.78
57.35203.68
85.81223.51
105.20253.29
114.96303.00
144.39322.91

Table B (Blade Lengths in mm)

2003505006251000
250400550750
300450575675

 

Imperial 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 the divide it into sections of equal length using values from Table B.

Example:
Selecting a Pressure Stabiliser capable of transferring 657cfm @ 0.020 in wc.

Stage 1:
657 x 0.137 = 90 inches of total blade length.Where: 657 = Volume in cfm and 0.137 = Factor from Table A relating to 0.020 in wc.

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 90 divided by 4 blades = 22.5in.

Rounded up to the nearest standard blade increment from Table B gives you 4 x 22.64in blades.

Table A (Factors)

in wcFactorin wcFactorin wcFactor
0.0120.1760.0600.0790.1410.052
0.0200.1370.0800.068
0.0320.1080.0880.065
0.0400.0970.1000.061
0.0440.0920.1200.056
0.0560.0820.1280.054

Table B (Blade Lengths in inches)

7.8713.7819.6926.57
9.8415.7522.6429.53
11.8117.7224.61

X-Ray Protection Baffle Screen

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

Laser Protection Screen

Laser Screen

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

Protective Guard

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

Fumigation Sealing Plate

Fumigation Sealing PlateDesigned to seal against one client nominated side of a 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

Baffle ScreenThe Baffle Screen has been designed to divert the air from the Pressure Stabilisers reducing jetting whilst allowing the Pressure Stabiliser to function correctly.

Light Baffle

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.

Extension Sleeve

APSX Extension

The Extension Sleeve allows the APSX unit to be installed in walls deeper then 150mm. Each sleeve increases the depth of the installation by upto a maximum of 65mm.
The sleeves simply clip onto the back of the backing flange allowing for easy installation.

Tapered Spacer

APSX-Tapered Spacer

The Tapered Spacer allows the APSX unit to be installed in walls less then 100mm. Each spacer decreases the depth of the wall depth requirement by 25mm.
The spacers are attached to the substrate then the backing flange/unit simply screws into the tapered spacer. 

Fire Rated

APSX®-FD Air Pressure Stabilisers

APSX®-FD
  • Operating range: 1 to 50pa
  • Opening accuracy +/- 0.5pa
  • VARI-centric® balancing system
  • Fire rating: 4 hour
  • Finish: SteriTouch® RAL9010
  • Electrical Supply: Not Required

Smoke/Fire Rated

APSX®-FSD Air Pressure Stabilisers

APSX®-FSD
  • Operating range: 1 to 50pa
  • Opening accuracy +/- 0.5pa
  • VARI-centric® balancing system
  • Smoke/Fire Rating: 2 hour
  • Finish: SteriTouch® RAL9010
  • Electrical Supply: 24VDC/240VAC

Bespoke

APS® Air Pressure Stabilisers

APS®
  • Operating range: 1 to 50pa
  • Opening accuracy +/- 0.5pa
  • VARI-centric® balancing system
  • Fire rated options
  • Finish: as required
  • Electrical Supply: as required
Product Information
APSX
• Unique blade release system for superior maintenance. 
• SteriTouch® antimicrobial protection as standard.
• Quiet day-to-day operation. 
• Low maintenance.

The patented VARI-centric® range of Pressure Stabilisers is purpose-designed for clean environments, such as Operating Theatres, Isolation Rooms and Cleanrooms to control airborne contamination by controlling room pressure differentials. 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, 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® 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

”Application”

Operating Theatres

Operating Theatres

The VARI-centric® 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 supercedes HTM 2025. They have also assisted with the validation of Isolation Room design following Health Building Notes (HBN 4 : Supplement 1).

Clean Rooms

Clean Rooms

Apreco’s leading VARI-centric® range of 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

Isolation Rooms
When following the guidelines of HBN4 Supplement 1: Isolation facilites in acute settings the VARI-centric 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.

”Unit
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 the divide it into sections of equal length using values from Table B.

Example:
Selecting a Pressure Stabiliser capable of transferring 310 l/s (0.31 m3/s) @ 5 Pa.

Stage 1:
310 x 7.35 = 2278.5 mm of total blade length.Where: 310 = Volume in l/s and 7.35 = 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 2278.5 divided by 4 blades = 569.25 mm.

Rounded up to the nearest standard blade increment from Table B gives you 4 x 575 blades.

Table A (Factors)

PaFactorPaFactorPaFactor
39.49154.25352.78
57.35203.68
85.81223.51
105.20253.29
114.96303.00
144.39322.91

Table B (Blade Lengths in mm)

200350500675
250400575750
300450625

 

Imperial 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 the divide it into sections of equal length using values from Table B.

Example:
Selecting a Pressure Stabiliser capable of transferring 657cfm @ 0.020 in wc.

Stage 1:
657 x 0.137 = 90 inches of total blade length.Where: 657 = Volume in cfm and 0.137 = Factor from Table A relating to 0.020 in wc.

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 90 divided by 4 blades = 22.5in.

Rounded up to the nearest standard blade increment from Table B gives you 4 x 22.64in blades.

Table A (Factors)

in wcFactorin wcFactorin wcFactor
0.0120.1760.0600.0790.1410.052
0.0200.1370.0800.068
0.0320.1080.0880.065
0.0400.0970.1000.061
0.0440.0920.1200.056
0.0560.0820.1280.054

Table B (Blade Lengths in inches)

7.8713.7819.6926.57
9.8415.7522.6429.53
11.8117.7224.61

 

”Accessories”

X-Ray Protection Baffle Screen

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

Laser Protection Screen

Laser Screen

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

Protective Guard

MeshGuard

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

Fumigation Sealing Plate

Fumigation Sealing Plate
Designed to seal against one client nominated side of an 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

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

Light Baffle

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.

Extension Sleeve

APSX Extension

The extension sleeve allows the APSX unit to be installed in walls deeper then 150mm. Each sleeve increases the depth of the installation by upto a maximum of 65mm.
The sleeves simply clip onto the back of the backing flange allowing for easy installation.

Tapered Spacer

APSX-Tapered Spacer

The Tapered Spacer allows the APSX unit to be installed in walls less then 100mm. Each spacer decreases the depth of the installation by upto a maximum of 25mm.
The spacers are attached to the substrate then the backing flange/unit simply screws into the tapered spacer.