DPM

• Continuous Monitoring.
• Multichannel capacity.
• Alarm auto-reset.
• Wall-mounted touch screen, HMI.
• High quality pressure transmitters.
• Overview screen makes interrogation simple.

Apreco’s DPM system provides an effective means of monitoring the differential pressures held within clean areas.

The operator interface is kept as simple as possible to minimise staff involvement, thus allowing staff to concentrate on their work, whilst the DPM monitoring system looks after the working environment.

Through the touch display screen, each sensor channel can be set to alarm at a specific set point at time of commissioning.
The display screen gives quick visual indication as to which area is in an alarm condition. An optional audible warning siren can be supported by the system.
When an alarm has been registered, it remains latched until the differential pressure has been restored in all areas where there has been an alarm condition. The system then auto-acknowledges and returns to normal operation

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 Air 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, 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® 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

”Application”

Operating Theatres

Operating Theatres

The VARI-centric® 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 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 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

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

”Unit
Metric Selection

To obtain an indicative size of standard APSX 123 use Table A below to calculate the total blade length of blade required and divided it into sections of equal length using values from Table B.

Example:
Selecting a stabiliser capable of transferring 220 l/s (0.22m³/s)@ 14Pa.

220 x 4.39 = 966 mm of total blade length.

Where:  220 (Volume of l/s)
            4.39 (Factor from Table A relating to 14Pa)

Table A (Factors)

PaFactorPaFactorPaFactor
39.49154.25352.78
57.35203.68
85.81223.51
105.20253.29
114.96303.00
144.39322.91

Divide this total into equal lengths using one of the standard blade lengths from Table B.
It is suggested that consideration should be made regarding any physical restrictions the building may impose before calculating the blade lengths of units.

Table B (Blade Lengths)

200350500675
250400575750
300450625

Therefore 966 divided by 2 (blades) = 483mm.
Round up to the nearest  increment gives you 2 x 500 mm blades.

Where:  966 (Total blade length)
            500 (Standard blade length from Table B)

Useful Tip: Using as few blades as possible will result in the most cost-effective solution. 

Imperial Selection

To obtain an indicative size of standard APSX 123 use Table A below to calculate the total blade length of blade required and divided it into sections of equal length using values from Table B.

Example:
Selecting a stabiliser capable of transferring 0.22cfm @ 0.056 in wc.

466.2 x 0.082 = 38.06 inches of total blade length.

Where:  466.2 (Volume of cfm)
            0.082 (Factor from Table A relating to 0.056 in wc)

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

Divide this total into equal lengths using one of the standard blade lengths from Table B.
It is suggested that consideration should be made regarding any physical restrictions the building may impose before calculating the blade lengths of units.

Table B (Blade Lengths in inches)

7.8713.7819.6926.57
9.8415.7522.6429.53
11.8117.7224.61

Therefore 38.06″ divided by 2 (blades) = 19.03″.
Round up to the nearest  increment gives you 2 x 16.69″ blades.

Where:  38.06″ (Total blade length)
            19.69″ (Standard blade length from Table B)

Useful Tip: Using as few blades as possible will result in the most cost-effective solution.

”Dimensions”
Metric Dimensions
Height single rowHeight each additional rowWidth single column
Nominal Size123mm+ 133mm per rowBlade Length
Minimum Aperture Size161mm+ 133mm per rowBlade length + 38mm
Overflange Size203mm+ 133mm per rowBlade length + 80mm
Imperial Dimensions
Height single rowHeight each additional rowWidth single column
Nominal Size4.84″+ 5.24″ per rowBlade Length
Minimum Aperture Size6.34″+ 5.24″ per rowBlade length + 1.50″
Overflange Size7.99″+ 5.24″ per rowBlade length + 3.15″
”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 Air 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 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

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