TWIN

The quality of incoming air varies a lot. Temperature and relative humidity fluctuate during the year, but more importantly, during the day! Secondly, during a round of birds (especially in rearing and broilers) oxygen needs increase, therefore also the need for fresh air.

Controlling the microclimate starts with having good inlet valves.

A good valve:

• Gives the incoming air the right direction
• Makes sure incoming air is well mixed.
• Prevents draught.
• Is insulated to prevent condensation on the inside of the valve.

The TWIN valve from Tulderhof has been designed to achieve these needs. Because of the unique hinge, the air always has an optimum direction. At minimum ventilation it takes the air up and this way, because of the Venturi effect, mixes with the inner air (fig 1-a). When opening more, the flap is lifted from the bottom of the frame. The air which comes through the lower opening is steered to the ground because of the special shaped top of the flap. This ensures a very good and complete distribution of fresh air (fig 1-b, 1-c) If, for some reason, the air is not supposed to go downwards and directly on to the animals (for example in pig husbandry) the pivot point can simply be moved to the bottom of the frame. This way one gets an air distribution as shown in figure 2.

The soft insulation material is a few millimeters broader than the flap, providing perfect closure and absolutely no gap between frame and flap. Draught is not a problem when using the TWIN valve!