LOT SYSTEM (LIQUID OFF TAKE)
LOT System is an advanced concept in multi-cylinder installations which overcomes lots of demerits of Bulk LPG Systems & conventional Manifold (VOT) systems. This system is widely used in Commercial & Industrial applications only where high pressure is required & not for domestic purposes
The system can be divided into 4 sections:-
- At the cylinder section in a LOT cylinder with adapters and manifold. Once the cylinder valve is turned on, the liquid LPG is sucked in through the adapter and is passed through to the manifold. The pressure here is the same as the cylinder pressure of 5-6 bar (kg/cm2).
- The liquid then enters the vapouriser section. Here is the liquid LPG travels through the vapouriser, it gets heated and starts to evaporate and form a vapour. A solenoid valve is kept on the vapouriser inlet to ensure that the liquid flow is stopped in case the vapouriser does not reach the set temperature.
- Next, the vapour enters the regulating section / Gas train. Here the pressure of the vapour is reduced to a set pressure of 2 bar from 5.5 bar. This can be further regulated to suit customer needs and distributed through a network of pipelines to the burner.
- A gas leak detection system and solenoid cut-off system can be provided for additional safety.
VOT SYSTEM (VAPOUR OFF TAKE)
It is the most common type of installation used mostly where the maximum LPG off-take is less than 60 kg per hour. Because of its design and working principle, this type of installation is advised only to consumers with comparatively low LPG usage.
The system can be divided into 4 sections :-
- In the cylinder section, the LPG in the cylinder vapourises and is carried into the manifold using an adaptor and an LPG hose. There are two manifolds one active and the other standby cylinder banks.
- The vapour is then passed through a regulator which acts as the first stage of regulation. Here the pressure is reduced to 2 bar from 5 bar.
- The vapour then passes through an LPG strainer before entering a second stage regulation which further regulates the pressure of the vapour..
- As the vapour moves along, it enters the distribution section and through a network of pipelines it is distributed to individual outlets.
