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