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Why You Should Have a PRV And How It Works

Time: 25-December 2025 | Source: I-FLOW| Share

A Pressure Reducing Valve (PRV) is a critical component in water, gas, and steam systems, designed to automatically regulate downstream pressure to a safe, consistent level. Installing a PRV ensures system safety, efficiency, and equipment longevity.

Why Install a PRV

  1. Protects Equipment
    Excessive pressure can damage pipes, pumps, valves, and appliances. A PRV safeguards your system by maintaining steady, safe operating pressure.

  2. Reduces Maintenance Costs
    By controlling pressure, PRVs prevent leaks, pipe bursts, and premature wear, saving money on repairs and system downtime.

  3. Improves System Efficiency
    Proper pressure reduces energy consumption, prevents water hammer in pipelines, and ensures uniform flow across appliances and fixtures.

  4. Compliance with Standards
    Many plumbing, HVAC, and industrial systems require PRVs to comply with safety and building codes, ensuring regulatory adherence.


How a PRV Works

A PRV works by sensing downstream pressure and adjusting the valve opening to maintain a preset pressure:

  • High downstream pressure → PRV partially closes → reduces flow

  • Low downstream pressure → PRV opens → increases flow

This automatic adjustment keeps system pressure stable regardless of upstream fluctuations, protecting both equipment and users.

Types of PRVs

  • Direct-acting PRV – Simple design for low-flow applications

  • Pilot-operated PRV – Suitable for high-flow, high-pressure systems

  • Steam PRV – Designed specifically for steam systems

  • Water PRV – Common in domestic and industrial water distribution

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