At SKS Valves, we understand the pressure challenges that HVAC, plumbing, and fire safety systems face every day. One of the most common issues in these systems arises from the premature failure of pressure reducing valves (PRVs)—especially those with plastic internal components.

While plastic-based PRVs might appear cost-effective initially, they often struggle under high-pressure drops and fail earlier compared to metal-internal options. That’s why SKS follows a different approach—built on strength, durability, and performance.

 

What Happens Under High-Pressure Drop?

When water pressure is reduced from a higher level (say 10 bar) to a much lower one (say 3 bar), the valve experiences:

  • Sudden pressure fluctuations

  • High flow velocity

  • Increased chances of water hammer and cavitation

This intense environment demands robust internal components—something plastic often can’t sustain for long.

Why Plastic Components Fail Sooner

  • Deformation Under Stress
    Plastic pistons or seats can bend or crack over time, leading to leakage or inaccurate pressure control.

  • Heat Sensitivity
    Under high temperatures, plastics tend to soften and lose shape—affecting the long-term efficiency of the valve.

  • Erosion & Wear
    Fast-moving water carrying fine debris can erode plastic parts faster than metal, reducing valve life.

  • Chemical Reactivity
    Chlorinated water and cleaning agents can make plastic components brittle over time.

  • Vibration Damage
    Water hammer or pressure spikes cause internal shocks—metal parts handle this better than plastic.

SKS Valves: Built for Durability, Made for Pressure

At SKS Valves, we design PRVs using brass and stainless steel internal components that are:

  • Suitable for high-pressure drops (up to 10:1)

  • Resistant to heat, corrosion, and erosion

  • Designed for long service life with minimal maintenance

  • Ideal for commercial buildings, process industries, and fire-fighting networks

 Conclusion

Choosing the right PRV isn’t just about cost—it’s about performance, safety, and reliability. PRVs with plastic internals may work in basic applications, but when high pressure and durability matter, SKS Valves offers a proven alternative. We don’t compromise on quality—because your system deserves nothing less.

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