CENTRAL VACUUM SYSTEMS

Dynavac Engineering has been designing Central vacuum systems since 1973. We have developed a Modular design that enables us to quickly modify any unit to meet your exact specifications.

The necessity to keep all the noise sources away from point of use has urged us to develop a complete range of vacuum units mounted on vessels/Base Frames to satisfy all needs. The pumps work together or with lead-lag controller according to vacuum requirements and ensuring that supply is maintained uninterrupted.

Our sales and engineering team goes to site to critically examine the application and then can specify a system to ideally meet your requirements. This combination of experience, expertise and pre- design means you get what you need – faster.

ADVANTAGES OF CENTRAL VACUUM

Silent Service   - The system is installed away from point of use. Moreover Dynavac systems are quieter and vibration free as compared to many available on the market.

Economy of scale – One central system for each building. Reticulated pipe work is more economical than multiple, individual vacuum pumps.

Reduced Maintenance – One system to check means less labour and less chance of forgotten service avoiding breakdown.

Fail Safe- Dual vacuum pump system offers fail safe operation not possible on individual room units.

Increased service Life- Central vacuum system pumps switch off automatically when there is no demand.

Package systems- Installation requires only connection of power and vacuum line on small package systems and on larger systems all components are supplied so that sub assemblies can be easily put together.

You choose the pump- Rotary vane pumps for general use, high vacuum oil sealed for laboratories, oil free for dry applications, water sealed liquid ring type for wet/dirty applications.

Automatic Operation- vacuum switches monitor vacuum levels and automatically operate pumps to keep vacuum at desired level.

A TYPICAL CENTRAL MEDICAL VACUUM SYSTEM FULLY COMPLIANT TO

AS 2896-1998 COMPRISES OF:

VACUUM PUMPS

A choice of oil sealed rotary vane/ Dry vane or Liquid ring medium vacuum pumps. Generally Oil sealed pumps are supplied to the following specification: —

• Long Life aluminium blades guaranteed for three (3) years
• Fitted with air blast
• Nominal pumping capacity 0.75 m³/hr to 1440 m3/hr
• Ultimate vacuum 10mbar
• Supplied with direct drivesingle/3 phase 415 volt motors
• Fitted with suction filter and discharge oil mist eliminator
• Separate forced air high capacity aluminium pump cooling fan
• Air cooled radiator for low operating temperature
• Steel protection cover
• In built vacuum non return valve
• Low oil level switches

VACUUM RECEIVERS

Choice of Horizontal or vertical vacuum receivers  (100 to 4000 Litres) to the following specification:

• One receiver comprises:
• Vacuum reservoir manufactured to AS1210 pressure vessel code
• Pipeline connection
• Inspection port
• Vacuum gauge
• Isolation valve
• Drain valve.

VACUUM PUMP CONTROL SYSTEM

Custom built vacuum pump control system consisting of the following;

• PLC based system
• Main Switch, neutral link, earth bar and circuit breaker for each motor and control circuit.
• Digital low vacuum switches for each pump
• Digital vacuum switch for low vacuum alarm
• Manual / Off / Auto selector switches for each pump
• Selector switch to enable any pump to be selected as the lead pump
• Vacuum pump hour run meters
• Service due alarms for each pump
• Start / Reset push button
• Emergency stop push button
• Low voltage control circuit
• System reset button
• Lights test push button
• Lights -
• Pump run / fault status
• Supply normal
• Vacuum system low pressure
• Vacuum system failure
• Service due

SYSTEM ASSEMBLY

The vacuum pumps are logically arranged on a base frame assembly / Receiver connected to the reticulated vacuum line via a common branch connection with the following inclusions per pump:

• Isolation valve
• Check valve.
• Flexible pipe section for vibration isolation

OPTIONAL BACTERIAL FILTERS

• Two manual changeover bacterial filters manufactured to National Health Service requirements.
• Differential pressure gauge and vacuum Flask.
• Complete bacterial removal to 0.0001% penetration when tested to BS 3928 efficiency.