Pietro Fiorentini Aperflux 101 Regulator | High-Pressure Pilot-Operated Gas Regulator

The Pietro Fiorentini Aperflux 101 is a boot-style, pilot-operated gas regulator built for medium- and high-pressure natural gas systems. Engineered for industrial reliability, the Aperflux 101 delivers exceptional accuracy, dynamic response, and fail-safe operation even in the most demanding utility applications.

As a fail-open Pietro Fiorentini gas regulator, the Aperflux 101 automatically opens in the event of main diaphragm failure or loss of pilot pressure—ensuring uninterrupted gas flow in safety-critical environments.

Key Benefits

• Maintains safe gas flow even during component failure (fail-open)

• Precision control for high-capacity natural gas networks

• Low maintenance with top-entry design for easy servicing

• Built-in noise-reduction cage for quiet operation

• Compatible with in-line monitoring and override setups
   

Features

• Max inlet pressure: up to 1,233 PSIG

• Downstream pressure: adjustable via pilot (1.5–1,073 PSIG depending on model)

• Ambient temperature range: -40°F to +140°F

• Flanged connections: ANSI 150–600 RF/RTJ or PN16

• Accuracy class AC up to 1.5%; Lock-up class SG up to 2.5%

• Nominal sizes: 2” and 3”
   

Benefits

• Protects critical infrastructure with built-in overpressure design

• Optimized flow control under both sub-critical and critical pressure conditions

• Simple maintenance with compact top-entry construction

• Supports electric or pneumatic pilot control (manual optional)

• Integrates with additional safety features like accelerators and limit switches
   

Capability

• Suitable for filtered, non-corrosive gases such as natural gas, propane, nitrogen, and more

• Designed for installation in indoor, outdoor, or underground settings

• Accommodates remote pilot control and in-line monitoring for safety redundancy

• Ideal for city gate stations, industrial plants, and distribution networks

• Meets global standards: UNI, DIN, ISO 7005, EN 334
   

Construction

• Body: ASTM A352 LCC (ANSI 600/300); A216 WCB (ANSI 150/PN16)

• Seals: Nitrile rubber

• Seat: Stainless steel or carbon steel w/ stainless edge

• Diaphragm: Reinforced rubberized canvas

• Head covers: Cast steel ASTM A350 LF2

• Pilot restrictors: Adjustable AR100 for accurate bleed control