TL
05/07/2005, 08:53 AM
IMO, this can be considered as a new way to circulate and control flow pattern in a tank The system makes use of air pumped out from ordinary aquarium air pumps to control the on/off of water coming from outlet(s):
The device can be applied to various flow supply and re-circulation system. System components : 1/ pneumatic valve 2/ air pump 3/ Sequence Timer.
The aim of the device is to provide independent on/off control of water output manifolds (controlling both the on/off frequency and duration), thus, creating different flow pattern and flow sequence.
The timer control and air pump(s) can be located at any distance far away from control valves without any electrical connection .
Each valve¡¯s on/off duration and activation intervals between different valves can be independently preset by second and each pneumatic control valve can be fitted at any point in the circulation loop.
It is especially suitable to fit into single pump recirculation system with multiple outlets.
In addition to being used as a flow control device, it can be used as a surge device and wave maker. The bubble and noise problems of common surge devices can be easily resolved and the surge tank can also be used a wet-dry filter when fitted with proper media like bio-balls.
You can click to see how it works on a ¡°twin-surge¡± setup. The surges fire one after another, see how it works for a small 18-inch tank:
http://www.hkaquazone.com/gallery/showphoto.php?photo=5521
The attached is a diagram on general layout.
The device can be applied to various flow supply and re-circulation system. System components : 1/ pneumatic valve 2/ air pump 3/ Sequence Timer.
The aim of the device is to provide independent on/off control of water output manifolds (controlling both the on/off frequency and duration), thus, creating different flow pattern and flow sequence.
The timer control and air pump(s) can be located at any distance far away from control valves without any electrical connection .
Each valve¡¯s on/off duration and activation intervals between different valves can be independently preset by second and each pneumatic control valve can be fitted at any point in the circulation loop.
It is especially suitable to fit into single pump recirculation system with multiple outlets.
In addition to being used as a flow control device, it can be used as a surge device and wave maker. The bubble and noise problems of common surge devices can be easily resolved and the surge tank can also be used a wet-dry filter when fitted with proper media like bio-balls.
You can click to see how it works on a ¡°twin-surge¡± setup. The surges fire one after another, see how it works for a small 18-inch tank:
http://www.hkaquazone.com/gallery/showphoto.php?photo=5521
The attached is a diagram on general layout.