Laminar Pte Ltd Singapore

Laminar Pte Ltd


Flap Valves

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Group 1 1


Flap valves are vital in controlling fluid flow and stopping reverse flow in various industries. These valves are usually made of stainless steel, ductile iron, or carbon steel. They have a hinged flap that allows fluid to flow in one direction while preventing it from returning.

Flap valves, also known as flap check valves or non-return valves, are commonly used in water and wastewater systems. They’re placed at the end of pipes or channels to ensure water levels stay right and prevent unwanted return flow.

A flap valve comprises a strong valve body with a hinged flap inside. When fluid flows in the right way, it pushes the valve flap open, letting it flow easily. But if there’s any attempt at reverse flow, the flap’s weight and the pressure drop make it close tight, stopping anything from returning.

One significant advantage of flap valves is their ability to handle different fluid flows. Whether a low-pressure system or high-speed flow, these valves can control fluid movement well while minimising pressure loss.

Compared to other check valves like swing check valves or ball check valves, flap valves have some benefits. They have a simpler design and don’t need as much maintenance because they have fewer moving parts. Plus, they’re great for applications with fluids that have debris in them because they’re self-cleaning.

Flap valves are important for controlling fluid flow and preventing reverse flow in many industries. They’re reliable and efficient and play a big role in industries that need precise control over how liquids move.

Check valves in wastewater and raw water systems must let big solids pass through. Flap valves are a good choice because they don’t have any parts that can catch stringy material. They’re handy in exceptional cases, like sewers with mixed stormwater and wastewater.

Laminar makes different models of flap valves that are strong against corrosion, need less maintenance, and work with different setups. You can get them in stainless steel or ductile iron, depending on what you need for your business.









Wastewater Applications | Water treatment plants | Industrial plants


  • Metal seated and resilient seated
  • Flange end option
  • With tilting disk to reduce pressure loss
  • Discharge preferably underwater
  • Discharge from drainage system at minimal pressure loss
  • Top corrosion resistance by use of non-corrosive materials
  • Low weight For gravity lines


Flap valves are crucial in managing fluid flow and ensuring the smooth operation of various systems. The purpose of a flap valve is to control the direction and rate of fluid flow by utilizing a hinged flap or door mechanism.

One key aspect of flap valves is their valve seat, which helps create a seal when the valve is closed. This prevents any backflow or unwanted leakage, ensuring fluid flows only in the desired direction.

Flap valves are designed to handle a wide range of applications. They are effective when direct pressure from upstream water or other fluids must be managed. These valves allow efficient control over the flow rate by opening and closing based on the fluid’s pressure.

Downstream water, for example, can exert significant pressure on a system. Flap valves help regulate this pressure by allowing water to flow out while preventing any reverse flow from entering back into the system.

Flap valves are used in different industries, such as:

  • wastewater management
  • drainage systems,
  • irrigation networks, and
  • flood prevention measures

They help to manage downstream water and prevent backflow damage or disruptions. Their versatility makes them an essential component in maintaining optimal fluid flow.

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