When it comes to pressure reducing valves (PRVs), one size does not fit all—especially in high-pressure applications. Whether you're managing a high-rise plumbing system, industrial plant, or fire-fighting network, your PRV needs to deliver consistent, durable, and safe pressure control.

And that’s where piston-type PRVs outperform diaphragm-type PRVs.

At SKS Valves, we help engineers, contractors, and consultants make better choices for demanding projects. Here's a deep dive into why piston-type PRVs are the smarter pick for high-pressure environments.

Understanding the Difference: Piston vs. Diaphragm PRVs

Diaphragm-type PRVs
Use a flexible rubber diaphragm to adjust and control downstream pressure. These are suitable for low- to medium-pressure systems, often used in domestic water lines or small-scale plumbing.

Piston-type PRVs
Use a solid piston (usually brass or stainless steel) that slides within a cylinder to regulate pressure. These are preferred in high-pressure, high-flow, and rugged industrial setups.

Why Piston-Type PRVs Perform Better in High Pressure

  • Stronger Internal Construction
    The piston mechanism is rigid and robust, allowing it to handle high inlet pressures without deformation.

  • Higher Pressure Reduction Ratios
    Piston-type PRVs can manage a pressure drop ratio of up to 10:1, making them ideal for tall buildings and industrial plants. (Most diaphragm-type PRVs struggle beyond 3:1 or 4:1.)

  • Superior Durability
    Pistons are made from metallic components that resist wear and tear over time, even under aggressive flow and debris-filled water.

  • Less Vibration and Better Stability
    The piston slides in a guided path, reducing water hammer and ensuring smooth flow control—even under sudden load changes.

  • Better for Dirty Water Conditions
    Piston-type PRVs are more tolerant to sediment or hard water—diaphragms are sensitive and prone to tearing or clogging.

 Real-Life Applications Where Piston PRVs Excel

  • High-rise residential & commercial buildings

  • Fire protection systems

  • Industrial steam and water distribution

  • MEP projects with fluctuating or extreme pressures

  • Booster pump systems in municipal supply lines

 Why SKS Valves Recommends Piston-Type PRVs

At SKS Valves, we’ve seen it all—pressure surges, aggressive water conditions, fluctuating loads. That’s why our piston-type PRVs are built with:

  • Corrosion-resistant brass and stainless steel

  • Replaceable strainers for debris protection

  • Fine-tuned pressure control with minimal maintenance

  • Reliable performance even in 24x7 operations

We don’t just sell PRVs—we engineer trust.

Conclusion

When the pressure is high, don’t leave performance to chance. Diaphragm-type PRVs have their place, but for serious, sustained, and demanding systems, piston-type PRVs are the clear winner.

Choose SKS Valves for rugged performance, engineered precision, and peace of mind that flows with every drop.

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