Xf rubber slow-closing check valve is a new type of water supply and drainage valve product with a full rubber structure and a "duckbill-shaped" appearance, which has the function of "forward inflow, reverse check". It adopts different design mechanisms and different rubber formulas for different working conditions according to force analysis and force calculation, and is made according to special processes. When working in the forward direction, water flows in from the water inlet, and a small water pressure can open the valve. The greater the water pressure, the greater the valve opening and the greater the water flow. When working in the reverse direction, the valve port is naturally closed, the seal is checked, the greater the back pressure, the tighter the valve port, and the better the sealing effect. It is widely used in various water outlets such as municipal administration, water conservancy, and sewage treatment to prevent backflow and backflow. It is an ideal product to replace flap doors.

- Product Features

Compared with traditional flap doors, the advantages are particularly obvious:

a Automatic opening and closing according to the water pressure difference, safe and reliable, no noise, no need for personnel operation, and no maintenance;

b The forward opening water resistance is small, the starting pressure is small, and the flow rate is naturally adjusted according to the water pressure;

c The reverse check seal is good, there is no leakage, and backflow is prevented. The greater the back pressure, the better the effect;

d Anti-corrosion, aging resistance, no deformation, strong adaptability, and long service life;

e Wide range of sizes, nominal diameter DN50 to DN3000.

- Installation structure

1) Sleeve type XF-T is installed at the outlet of the drain pipe

2) Flange type XF-F is installed at the outlet end of the drain pipe with flange

3) Mounting plate type XF-F is installed on the structure at the end of the outlet

4) Built-in type XF-F is installed at the end of the urban rainwater and sewage and system outlet

5) Mortar or cement pipe type XF-T is installed at the end of the mortar or cement pipe