Accessibility Tools

RFL – Round Flap Gate


Vaycom Engineering RFL round flap gate model is a solution specifically designed for sewer lines in a variety of applications, including dams, sewage lines and wastewater disposal lines.

The flap stays closed preventing water back-flow, and it opens automatically when the unseating water head is higher than the seating water head.

They come in a wide range of sizes, varying from Ø150mm to Ø1200mm and provide a high level of watertightness.

Vaycom offers the possibility to design and manufacture larger models according to the specific needs of each customer.

Válvula de Retención RFL - VAYCOM

Standard design

Designed according to DIN19569-4 Class 5.

Can be bolted to a flange or mounted on a wall.

Flange connection options according to different standards: PN2,5, PN10, PN6, PN16, ANSI150, among others.


Pressure rating up to 5 bar in sizes DN150-DN1200.
(Other pressures on request).


From DN150/6″ to DN1200/48″.


Mechanically welded construction in S275JR, AISI304L or AISI316L.
(Other material on request).




Drainage Lines / Weirs / Sewage Lines / Water Drainage Ducts


Its simple operation keeps the flap closed to prevent backflow and opens automatically when the backflow load is greater than the forward flow load.

Accesories and options

Additional accessories and components such as hydraulic actuators are available for applications requiring quick opening, e.g. storm tanks.

RFL – Round Flap Gate

VAYCOM document with the product data sheet.