Laminar Pte Ltd Singapore

Laminar Pte Ltd

Valves

Dual Plate Check Valves

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Group 1 1

Description

Dual plate check valves are vital in industries that demand efficient fluid flow management. These valves prevent reverse flow and curtail pressure drops, ensuring optimal fluid control and energy conservation.

The ingenious design of dual plate check valves incorporates two plates that elegantly swing open, permitting fluid flow in one direction while staunchly stopping backflow. This inventive mechanism curbs pressure losses, making them indispensable for applications where maintaining the right fluid pressure is paramount.

A hallmark of dual plate check valves is their responsive torsion spring action, ensuring swift closure when fluid direction changes. This feature boosts efficiency and averts water hammer and hydraulic disruptions, safeguarding system integrity.

Additionally, these valves feature a central hinge pin that guarantees smooth movement and diminishes wear, thus enhancing their lifespan and making them a cost-effective option across industries.

Unlike other check valve designs, dual plate check valves are favoured in specific sectors due to their minimised slamming effect compared to swing-type check valves, exemplifying their widespread appeal.

Specifications

PN

10, 16, 25, 40, 63

DN

50-1500

ASME/API Pressure rating

150-1000

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

  • Compact design
  • Low critical velocity
  • Low-pressure drop
  • Low cracking pressure
  • Six different body options:
    • Wafer type
    • Double flanged type
    • Solid lug type
    • Hub-end type
    • Buttweld end type
    • Buttweld end with access type
  • Designed and tested in accordance to API 594

FAQ's

The superiority of a dual plate check valve establishes it as a sought-after solution for a spectrum of fluid flow applications. As a non-slam check valve, it embodies an array of merits that collectively amplify its efficiency and reliability.

A pivotal edge lies in its adeptness at managing pressure surges. Crafted with a dual plate design, the valve’s swift closure curbs reverse flow and potential backflow that might imperil equipment or disrupt system functionality. This attribute renders it particularly fitting for systems marked by fluctuating pressures, such as condensate systems.

Another vantage point is its streamlined design. Fueled by the stop-pin and hinge-pin mechanism, the valve operates with fluidic finesse, minimizing resistance to flow and ensuring optimal performance even amid high-pressure environments. This architectural feat simultaneously curbs the risk of water hammer, a notorious menace liable to inflict considerable damage on pipelines and related components.

Moreover, dual plate check valves earn acclaim for their compact stature and lightweight constitution when juxtaposed with conventional swing check valves. This facet simplifies installation and maintenance endeavours, translating into noteworthy savings in time and expenses.

Concisely, the benefits of a dual plate check valve encompass its prowess in navigating pressure surges, its streamlined design that mitigates flow resistance, and its compact form that eases installation and maintenance tasks. This composite suite of attributes designates it as a preeminent choice for a gamut of applications where unfaltering fluid control is paramount.

Regarding controlling the flow of fluids, two commonly used valves are swing check valves and dual plate check valves. While they both serve a similar purpose, they have significant differences.

One key difference lies in their connection type. Swing check valves typically have flanged or threaded connections, making them suitable for various applications. On the other hand, dual plate check valves often feature wafer-style connections, which allow for easy installation between flanges.

Another notable distinction is the hinge mechanism. Swing check valves have a single hinge at the top, allowing the disc to swing freely when fluid flows through. This design offers excellent sealing capabilities and prevents backflow efficiently. In contrast, dual plate check valves utilize two plates that pivot on a central hinge pin. This configuration allows for a shorter stroke and faster response time.

Moreover, service life is essential when choosing between these valve types. Swing check valves have a longer service life due to their simple design and fewer moving parts. Dual plate check valves may require more maintenance as they have multiple plates and hinges that can wear over time.

Lastly, weight can be a factor in certain applications where extreme weight restrictions exist. Swing check valves tend to be heavier due to their larger size and single-disc design. In contrast, dual plate check valves offer a more compact and lightweight alternative without compromising performance.

Assuring a dual check valve’s seamless operation and dependability mandates comprehensive testing. Consistent testing practices unveil potential glitches or malfunctions, preempting critical issues. Here’s a breakdown of pivotal steps for an adequate dual check valve examination:

  1. Visual Assessment: Commence with a visual scan for damages, corrosion, or leaks. Validate secure connections and rule out conspicuous defects.
  2. Pressure Validation: Affix pressure gauges to both inlet and outlet ports. Gradually heighten pressure on one side, vigilantly tracking the gauge on the opposing end. A stable pressure without marked descent or fluctuations is indicative of proper function.
  3. Flow Scrutiny: Gauge valve flow capacity by integrating it into a system with established flow rates. Quantify the flow in both directions. The valve should seamlessly facilitate uninhibited flow in one direction while halting backflow in the other.
  4. Leakage Check: Subject one valve side to a fitting test medium (like air or water) while hermetically sealing the opposite side. Inspect both ports for leakage, deploying techniques like visual inspection or bubble tests.
  5. Operational Simulation: Immerse the dual check valve in real-world scenarios by subjecting it to intended operational conditions. This entails assessing its performance under varying pressures, temperatures, or fluid types aligning it with stipulated specifications.

Acknowledge that testing protocols might deviate in tandem with distinct industry norms and manufacturer directives for dual check valves. Consistently consult pertinent documentation and experts if warranted.

Stringently adhering to these testing protocols fosters unwavering trust in the reliability of dual check valves. In turn, it guarantees optimal functionality within crucial applications where safeguarding against backflow is pivotal for safety and efficiency.

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