Pietro Fiorentini Dival 500 Regulator

The Pietro Fiorentini Dival 500 regulator is a spring-loaded, diaphragm-controlled gas pressure regulator ideal for low-, medium-, and high-pressure gas distribution systems. Designed for both industrial and civil installations, this regulator is widely used due to its precise pressure control, fail-open operation, and high flow rate capacity.

Its modular design makes it easy to maintain and upgrade—such as retrofitting a slam-shut device without altering existing piping. Internal and external sensing options allow flexibility for a wide range of applications.

Key Features:

  • Balanced Plug Design: Maintains stable outlet pressure regardless of inlet pressure changes.

  • Fail-Open Operation: Ensures flow continues in the event of diaphragm failure or pressure loss.

  • High Accuracy: Maintains consistent pressure even at maximum flow rates.

  • Modular Upgrades: Easily retrofit with slam-shut (OPSO/UPSO) devices without changing pipe layout.

  • No Internal Leakage: Secure shutoff when flow is zero.

  • Quick Maintenance: Serviceable without removing from pipeline.

 

Benefits:

  • Suitable for civil and industrial natural gas systems

  • Accurate performance in fluctuating flow and pressure conditions

  • Reduced response time with a low lock-up pressure zone

  • Simple integration with external or internal sensing lines

  • Low maintenance with long-lasting internal components

 

Applications:

  • Commercial and industrial gas distribution

  • Natural gas gate stations

  • Burner systems with rapid flow changes

  • Installations requiring optional OPSO/UPSO protection

 

Construction & Compliance:

  • Manufactured to UNI 8827 and EN standards

  • Available in multiple pressure and size configurations

  • Compliant with PED (97/23/EC) safety standards