The Pottery Place
Pottery Kilns Australia
KILN VENTING SYSTEMS
Built to industrial standards so you can expect years of efficient use.
Air and fume flowpaths are aerodynamically designed to obtain maximum efficiency.
We can provide a kiln vent to suit most kilns.
(1) Standard system suitable for single story building.
(2) Through roof or wall terminating at jacks cowl. To be installed in accordance with standard building regulations
(3) Secondary cooling air creates a vacuum at roof or floor vents, then draws by-product out of kiln to atmosphere
(4) Fan is wired to kiln so it automatically operates when kiln is switched on.
(5) Kiln by-product.
The equipment needs to be ducted to atmosphere to meet with current building regulations. The kiln vent is designed for use with standard non-corrosive PVC storm water pipe as ducting plus associated fittings all readily available from your local hardware or plumbing store.
A Jaks cowl will be supplied with equipment. Purchase PVC ducting from your local supplier or installer i.e. Plumber
In the case of a new kiln and kiln vent electrical connection would be carried out during manufacture.
The #2 kiln vent model will create a slight down draft in the kiln.
Air is drawn through the venturi tube thus creating a slight vacuum at the floor vent. Thus drawing all by-products from kiln. By products are diluted with cool air then vented to atmosphere.
It would be envisaged that the Kiln vent 3 would be suitable for all existing front loading kilns or where it would be impractical to install the kiln vent 1 or 2.
We would recommend the kiln vent 1 in most situations as it creates a slight down draft situation in kiln thus helping balance of rising heat effect.
We would also recommend the Kiln-vent 1 and 2 be fitted to all small and large kilns up to K12 during manufacture to keep site installation, cost etc to a minimum.
Part of the efficient operation is based on the expansion of by-products in kiln environment, approximately 1600-1; this expansion creates pressure in the kiln. The expanded by-product is then drawn away, diluted then expelled to atmosphere. Only a minimal amount of air is actually drawn into the kiln for this reason. Kiln firing cycles are only extended marginally. Kiln operating costs are therefore much the same.
Expansion is based on 1 litre of water becoming 1673 litres of steam at atmospheric pressure
Approved by Ministry of Housing and Construction
In cases where a kiln vent system is fitted to kiln
Model (1 & 2)
Underneath system all bungs should remain in their respective positions for the duration of firing.
Overhead system all roof bungs should be removed and door bungs should remain in door for duration of firing.
Vent system when installed correctly will automatically function when power to kiln is switched on, and will continue to operate until power is switched off. Power should not be turned off until the kiln has cooled to a reasonable level.
Care should be taken not to place ware over exhaust hole in floor of kiln. This would make vent system inoperative. Alternatively a shelf could be set on 25mm props thus giving approximately 12mm clearance to exhaust tube.
Replacement Air for Vent System
It is very important to replace the air in the room that is being extracted. If a grill or similar is not provided and make up air cannot enter the room the ventilation system will not work correctly. We recommend for a standard No 1 Vent system a “grill” of not less than 625cm2 (25 cm X 25cm) and for a standard model No 2 and 3 Vent system a “grill” of not less than 1225 cm2 (35cm X 35cm). For a non standard vent system ask us about the size of the ”grill” that is required.
Note: The kiln must be fitted with the supplied non-return Jaks cowl.
If fitted with a Chinaman’s Hat type cowl, back draft will occur and cause a problem.