ATEX rated desiccant dryers



All electrical components are individually ATEX certified and the finished desiccant dryer is then certified

Overview of ATEX rated desiccant dryers

It is fair to say that ATEX rated desiccant dryers are something of a rarity. The reason for this is twofold - they are costly bits of equipment and secondly they are typically putting air into a ducted system.

The first reason is more or less self explainatory. ATEX rated desiccant dryers are expensive because they are made from components which themselves are ATEX rated and both expensive and hard to source. Then the machine once complete needs to be certified, which adds both time and cost to the finished dryer.

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ATEX rated desiccant dryers have components are generally larger, heavier, and far better insulated against gas and dust ingress than standard components.

Because of their relativly high cost, users are always looking for alternative ways to solve their drying problems, and typically where there is a requirement for a desiccant dryer in a gas or dust 'zone', then where possible, the dryer is located outside the zone and the dried air ducted into the zone to where it is needed. This means that the desiccant dryer, being located outside the zone, does not need to be ATEX certified, thus saving the substantial difference in cost between the a standard desiccant dryer and and equivilant ATEX rated desiccant dryer.

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This is what a standard Desiccant Dryer from the VRF range looks like

ATEX rated desiccant dryer may be rare, but these special machines do exist, although they are mostly built to order because the requirements for them are so occasional. Having supplied ATEX dryers before, Puravent have jumped through the relevent hoops and can supply any of the VRF range of desiccant dryers as a custom-built special ATEX version. The exact specification and of course the pricing, depend on the duty, zone and temperature class that the dryer needs to be designed to.

But if you must have an ATEX certified desiccant dehumidifier and you can't wriggle out of it by using extra ducting and putting the machine outside the ATEX zone, then give us a call.

Were you looking for ATEX heaters? You can browse that range by clicking the link. Alternatively, find out more about ATEX fans.

Heat Load	Watts	BTU
Average The Room Is A Normal Residential Room, Office, Reception Area Or Similar, Where There Is Not Overly Crowded With People, Computer And Office Equipment.
Above Average There Are Factors That Contribute To Additional Heat Being Generated In The Room E.G. Strong Lighting, Overcrowding With People And Office Equipment, Conservatory Type Room, Or Flat Roofed Room.
High There Are Factors That Contribute To A High Heat Load In The Room. E.G. Commercial Cooking, Much Computer And Server Equipment, Switchgear, Temporary Building With Thin Walls And Flat Room, Plain Glass Conservatory.

Variable	Units	Notes/Guidance
System Airflow	M3/Hr	If you have it in cfm then multiply your cfm value by 1.7 to get m3/hr
Average Combined Pressure Drop Of Filters Of Higher Than F6 Efficiency	Pascals	F8 bag filters pressure drop - typical clean clean to dirty, 160 - 250 Pascals F9 compact filters pressure drop - typical clean to dirty, 160 - 350 Pascals H10 HEPA filter pressure drop - typical clean to dirty, 250 - 600 Pascals 9.8 Pascals = 1 mm wg, & 249 Pascals = 1 inch wg
Carbon Filters Pressure Drop	Pascals	For compact type carbons pressure drop between 100 - 150 Pa Bonded carbon panels typically 150 - 170 Pa Loose granular carbon panels typically 130 Pa
Annual Operational Hours	Hrs/Annum	8760 hours in a year If operating for 5 days a week, excluding public holidays, for 12 hrs/day = 3000 hrs
Cost Of Power	Pence Per Kwh	Huge variance in what different companies pay. heck your last bill to be sure, otherwise put in 10p
Fan Efficiency	(As Decimal Value, Eg 100%=1)	Would typically be around 60%, so if you don’t have specific information use 0.6
Fan Motor Efficiency	(As Decimal Value, Eg 100%=1)	Larger motors should be around 90%, so if you don’t have specific information use 0.9

The Total Average Pressure Drop Over Your Higher Efficiency Filters And/Or Carbon Filters Is;		Pascals
This Pressure Drop Is Costing In Energy Alone	£	Per year
It Is Probable That A Sanuvox In-Duct System Could Break Down The Biological, Chemical And Odourous Contaminants On This Air Flow For Between 16 And 25% Of This Running Cost	£	Lower energy cost estimate of an equivalent Sanuvox system (16%)
	£	Higher energy cost estimate of an equivalent Sanuvox system (25%)

Type Of Building	Kw Range		BTU Range
Sports Centres
Retail Premises
Office Premises
Small Industrial Unit
Medium Industrial Units
Larger Industrial Buildings
School/Community Halls
Churches

Room/building volume	m3
Temperature differential (deltaT °C)	°C

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