Laminar Pte Ltd Singapore

Laminar Pte Ltd


Diaphragm Valves

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Group 1 1


Diaphragm valves are indispensable across a broad range of industries, especially in applications like water treatment and fluid flow control in heavy industrial applications. They’re ingeniously designed, featuring a flexible diaphragm as the primary element for managing fluid flow. The valve body is constructed from robust materials like ductile iron, cast iron, bronze, stainless steel, or plastic, ensuring durability and corrosion resistance.

These valves shine in their versatility, handling a broad spectrum of fluids, including viscous and corrosive fluids. The choice of diaphragm material is pivotal, as it determines chemical resistance and operational longevity.

In the closed position, the diaphragm forms a tight seal against the valve body, assuring zero leakage. Applying air pressure on one side causes the diaphragm to flex, creating a precise opening for fluid flow. This unique design offers meticulous control over flow paths and rapid response times.

Diaphragm valves are celebrated for their minimal pressure drop, making them the preferred choice in energy-efficient applications. They are compliant with industry standards and deliver consistent, safe, and reliable performance with excellent flow control characteristics.

Laminar’s diaphragm valves cater to various industries, including marine, shipbuilding, and specialized industrial applications. They’re particularly vital in scenarios where preventing cross-contamination is paramount, ensuring that the fluid remains residue-free in the vessel.

A standout feature of our diaphragm valves is their meticulous design, devoid of dead spots and equipped with glandless, high-sealing mechanisms. Additionally, they come with ABS approval, further underlining their reliability and suitability for diverse applications



Up to 16 Bar (Elastomer Diaphragm)

*Up to 10 Bar (PTFE Diaphragm)*
*Max pressure varies across size ranges




Water | Seawater | Chemicals


Water treatment | Marine | Shipbuilding | Industrial applications


  • Straight type and angle type
  • Sizes from 15 mm to 400 mm
  • Flange connections according to DIN or ANSI or JIS
  • With socket ends
  • With position indicator
  • Body material of gunmetal or bronze
  • Shaft material of brass and stainless steel
  • Diaphragm material of EPDM and NBR
  • Can be manually operated or with an electrical, hydraulic, or pneumatic actuator
  • The flanges can also be drilled according to ANSI, JIS, or EN. The socket design is available with an NPT thread.
  • Main feature is completely cleared of dead spots, glandless and highly sealed
  • Bubble-tight shutoff
  • Available with ABS approval


The diaphragm flow control valve is a type of valve that plays a crucial role in regulating the flow of viscous fluids within a system. This innovative valve utilises a flexible diaphragm, the main control element.

The working principle of a diaphragm flow control valve is relatively simple yet effective. As the pressure within the system changes, it causes the diaphragm to flex and move accordingly. This movement regulates the size of the flow stream, controlling the rate at which the fluid passes through.

One key advantage of using a diaphragm flow control valve is its easy handling of viscous fluids. The flexible diaphragm allows for smooth and precise adjustments even when dealing with thick or sticky substances.

Furthermore, these valves have various pressure ratings to accommodate different system requirements. Whether it’s low-pressure applications or industrial processes, diaphragm valves are available to suit specific needs.

The pressure of a diaphragm valve is determined by the application and the type of fluid it is handling. The valve must withstand the correct pressure to operate safely and efficiently, whether water, oil, or gas.

Diaphragm valves are designed with a flexible membrane that can withstand different pressure levels depending on their construction. The material used for the diaphragm also plays a pivotal role in determining its ability to handle certain pressures.

When choosing a diaphragm valve, it’s important to consider its maximum pressure rating. Many valves have their pressure rating specified on the product label, making it easy to determine whether or not it’s suitable for the application. It’s also important to note that higher-rated valves can handle greater levels of pressure.

The diaphragm valve operates flexibly as a barrier between the flowing medium and the valve body. This diaphragm is typically made of rubber or elastomer material and is controlled by a stem or actuator. When the stem is raised or lowered, it presses against the diaphragm to open or close the flow path. This unique design allows for precise control over flow rates and provides excellent sealing capabilities.

On the other hand, a ball valve utilizes a spherical ball with a hole in it as its main component. The ball has an opening that aligns with the flow path when in an open position and blocks it when rotated 90 degrees to a closed position. This simple yet effective mechanism allows for quick on/off operation and minimal pressure drop across the valve.

One key difference between these valves lies in their applications. Diaphragm valves are commonly used in industries where contamination prevention is crucial, such as pharmaceuticals, food processing, and water treatment plants. Their ability to provide full isolation between media makes them ideal for handling corrosive or hazardous substances.

On the other hand, ball valves find extensive use in various industries, including oil and gas, chemical processing, and HVAC systems. Their durability, high-pressure capabilities, and ease of operation suit applications requiring frequent on/off control or throttling.

Yes, a diaphragm valve can be used as a pressure-reducing valve. Its design and construction allow it to regulate the system’s pressure by flexing its membrane accordingly. This enables these valves to control the flow rate from higher to lower pressures without compromising sealing capabilities or durability. That said, a different setup of accessories must be mounted on the globe valve to become a PRV.

Unlike other pressure-regulating valves, such as gate valves, diaphragm valves do not require frequent maintenance or servicing to maintain their performance. The flexible membrane is protected from wear and tear from media particles to provide reliable performance over long periods.

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