The difference between the condenser and the iris diaphragm is easy to understand. The condenser collects the air coming from the condenser when it’s in its air-tight position. When the air is not in the condenser, the diaphragm allows air to get into the condenser, which causes the air pressure to rise. The rise in pressure causes the air in the condenser to be pressurized. In a closed system, the air pressure is pushed from outside the condenser and into the air in the system.
On the other hand, the diaphragm does not have an air-tight condition, so air can be pushed through the diaphragm. The air pressure inside the condenser rises due to the air in the air-tight condition, and this air pressure pushes the trapped air into the air in the diaphragm. So, the air inside the diaphragm is pushed upward. This pressure makes the diaphragm moves up and out of the condenser. You can clearly see that the condenser is a diaphragm and the diaphragm is a condenser. The concept is fairly simple. The difference between a diaphragm and a condenser is that a diaphragm uses compressed air in order to move upward, while a condenser uses a liquid to push the air up.
While the concept behind the condenser and the diaphragm is simple, the exact nature of what happens when they are being used is not. Depending on the type of product you are using, there are two types of systems. There are the diaphragm and the condenser, and there is a hybrid system, which combines the two of them. Since the idea behind the diaphragm is simplicity, I suggest that you stick with that type of system when you have products that require the best performance.