Laminar Pte Ltd Singapore

Laminar Pte Ltd

Valves

Nozzle-type check valve

Group 1 1
Group 1 1

Description

Nozzle check valves are instrumental in maintaining the smooth operation of industrial processes, averting water hammer effects, and guaranteeing unidirectional fluid flow. These precision-designed valves allow fluid to flow in one direction and prevent reverse flow.

Nozzle check valves can minimise pressure drop, ensuring an efficient and unhindered flow. These valves are made from stainless steel and ductile iron, exhibit durability, and excel in demanding environments.

The valve design of nozzle check valves equips them for rapid response and dependable performance. Engineered to adapt to flow changes swiftly, they effectively block backflow, preserving system integrity.
For optimal dynamic performance, these valves incorporate axial movement capabilities, ensuring smooth operation during abrupt alterations in pressure or flow.

Laminar’s nozzle check valves adhere to international standards, underpinning their reliability and compatibility with diverse systems. Their critical velocity attributes render them indispensable across various industrial applications that demand precise fluid control.

Nozzle check valves, known for their non-slam behaviour, accommodate all liquid and gaseous media. Their resilience to heat, thanks to high-quality metal materials and non-corrosive internal components, renders them suitable for various environments.

These valves exhibit low-friction movement, boast a compact design, and offer short disc strokes, all contributing to stable, maintenance-free operation, even in minimal flow conditions.

Their spring torque is designed for optimal flow rates, reducing spring cycling and maintenance needs.

With rapid and shock-free closure capabilities, thanks to their concise closure paths and low moving masses, nozzle check valves find applications across diverse industries. They provide streamlined flow paths in water pumping stations, distribution networks, desalination plants, oil pipelines, chemical facilities, wastewater treatment plants, power generation sites, and gas compressor stations.

Specifications

PN

10, 16, 25, 40, 63

DN

25 to 1000

Medium

Suitable for all liquids and gaseous fluids

Application

Pipelines | Pumping stations | Seawater desalination plants | Power plants | Cooling systems | Ethylene centrifugal compressor trains | LNG

Specifications

  • Non-slam closure
  • Very low-pressure loss
  • Short face-to-face length
  • Compact design and low-weight
  • Metallic sealing & rubber sealing choice
  • Maintenance free
  • Valve design according to ASME B16.34
  • End connection available options: Flanged and Buttweld
  • All valves undergo hydrostatic testing of the shell and seat, rated in accordance with ASME B 16.34 standards, API 594, and API 598 design and application specifications.

FAQ's

A swing check valve operates on a simple principle – the swinging motion of a disc that opens and closes the flow passage. This disc is hinged at the top and swings freely in response to changes in fluid pressure. The disc opens when the flow is in the forward direction, allowing fluid to pass through. However, when there is backflow or reverse flow, the disc swings back into position, effectively blocking any further passage of fluid.

On the other hand, a nozzle check valve type operates using a different mechanism. It consists of a nozzle-shaped constriction within the valve body. When fluid flows in the forward direction, it passes through this constricted opening without any obstruction. However, if there is flow reversal or backflow, pressure builds up against the nozzle area, forcing it to shut. This creates a seal that prevents any further backward movement of fluid.

The main difference between these two types lies in their design characteristics and operation principles. Swing check valves rely on gravity and fluid pressure to open and close. In contrast, nozzle check valves use differential pressure to create sealing action.

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