China high quality factory supply automatic machine for ventilation in greenhouses hot sale

2.Heat activated

3.Fully adjustable to open between -15-25 C

4.Suitable for windows up to 7kg( 15lbs )

5.Easy fitting by clamps or screws provided

6.No batteries or electricity required

based on thermostat in which liquid greatly expands or shrinks depending on the temperature.

In the sun, the temperature increases in a hothouse, thermostat located there in is heated,

the fluid pushes the piston and the piston, in turn, opens the window.

At sunset and a decrease in temperature in the greenhouse in thermostat fluid is compressed,

and the ventilator closes under its own weight.

Thus pane rises to 45 centimeters.

This system enables automatic ventilation greenhouses begin airing a temperature of 16 °,and 25 °.

The maximum length of the stem rises at 30C.

Packing like below:

Our Advantage

FAQ question:

Long xiang manufacture high quality gas springs.

We export more than 40 countries, got very good feedback from our customers.

We have perfectly equipments and our team is very stronger, we have germany engineers, and we also have deisgn,research and development group for meet all your requirments.

No matter how many you want,we will service you nice and quickly

Yes ,sure

Always 5-7 days,depend on the quanlity.

We can produce 500,000 pcs in each month.