Purge system
Our Market leading Purge and Pressurisation safety device ensures the safe operation of electrical machines and enclosures within Zone 1/21 and 2/22 hazardous areas. The unique attributes of this system provide numerous advantages over its competitors.
Concept [Refer to brochure for more details] – LINK TO BROCHURE
PP1214 is designed in accordance with IEC 60079-2:2014 Ed 6/ EN 60079-2:2007, ensuring a pressurised and leakage compensated enclosure. This creates a non-hazardous atmosphere inside the enclosure by keeping a positive differential pressure between the pressurised enclosure and atmospheric pressure to ensure that no potentially explosive gases enter the electrical equipment.
This type of protection consists of two main stages:
Purge Cycle:
Activated when the electrical machine is OFF prior to being switched ON. Clean air/inert gas is blown through the machine and monitored to ensure compliance with IEC 60079-2:2014 Ed 6/ EN 60079-2:2014.
Leakage Compensation and Pressurisation Cycle:
Once purge cycle is satisfactory the machine is considered non-hazardous and ready to be switched ON. A positive differential pressure to atmospheric has to be maintained. This is achieved by compensating for any air/inert gas leakages that the machine might have.
System Advantages
> Less pneumatic connections, reducing installation time.
> One size fits all.
> Minimum supply pressure of 3 barg.
> Fully automatic electronically controlled system, reducing
commissioning time i.e. No need to change outlet valve orifice plate
to achieve correct flow rate.
> Automatic machine leakage compensation display, which is crucial
information for machine maintenance.
> LCD information display.
> Up to 4250 ls/min [standard litres per minute] automatic leakage
compensation i.e. no additional “BOOST” device needed to increase
leakage compensation.
> Local or remote control/monitoring.
> No pneumatic logics used, minimising maintenance and the possibility
of faults, due to leakages.
> Risk of failure minimised due to simplified layout –
fewer components needed.
Models
| Models | Model Control | Leakage Compensation | Certification |
|---|---|---|---|
| PP1214.1.1 | Remote | Manual ball valve | * ATEX |
| PP1214.2.1 | Local | Manual ball valve | * ATEX |
| PP1214.3.1 | Remote | Automatic electrical solenoid valve | * ATEX |
| PP1214.4.1 | Local | Automatic electrical solenoid valve | * ATEX |
| PP1214.1.2 | Remote | Manual ball valve | ** ATEX and IEXEC |
| PP1214.2.2 | Local | Manual ball valve | ** ATEX and IEXEC |
| PP1214.3.2 | Remote | Automatic electrical solenoid valve | ** ATEX and IEXEC |
| PP1214.4.2 | Local | Automatic electrical solenoid valve | ** ATEX and IEXEC |
*Ex d e [ib] [pxb] IIB T4 Gb
Ex tb [pxb] [ib] IIIC T135°C Db
**Ex d e [ib] [pxb] IIC T4 Gb
Ex tb [pxb] [ib] IIIC T135°C Db