Pietro Fiorentini Aperval 101 Regulator

The Aperval 101 is a compact, pilot-operated Pietro Fiorentini gas regulator designed for low- and medium-pressure applications. Engineered with a modular top-entry design, it provides easy maintenance and allows for integrated upgrades such as monitor regulators, slam shut valves, or silencers—all without removing the unit from the pipeline. Aperval regulators deliver exceptional accuracy and turndown ratio, making them ideal for industrial processes, burner feeds, and natural gas gate stations.

This fail-open regulator ensures uninterrupted gas flow even in the event of a diaphragm rupture or loss of sensing line pressure. Built for operational safety and flexibility, the Aperval 101 supports clean, dry, non-corrosive gases and meets stringent industry standards.

Key Benefits

• Maintains gas flow under fail conditions (fail-to-open)

• Top-entry design enables inline maintenance and retrofits

• Modular build supports integrated monitor, silencer, or slam shut

• Excellent accuracy across variable inlet and outlet pressures

• Ideal for industrial processes with quick flow changes

Features

• Balanced valve with dynamic response

• Manual or remote pilot setting options

• Available integrated noise-reducing silencer

• Over/under-pressure protection with optional slam shut valve

• Retrofittable monitor (PM/182) uses shared body with separate pilots

Benefits

• Simplifies maintenance with inline access

• Avoids downtime with integrated safety features

• Supports emissions compliance with low-bleed options

• High-performance control even under sudden load changes

• Adaptable sizing from 1” to 4” with ANSI 150 RF or RTJ flanging

Capabilities

• Inlet pressure range: 7.25 to 362 PSIG

• Outlet pressure range: 2" WC to 137.5 PSIG

• Accuracy class: up to AC 2.5

• Closing pressure class: up to SG 5

• Optional monitor and slam shut installations

• Designed for filtered, non-corrosive natural gas

Construction

• Body: Cast Steel (ASTM A216 WCB) or Ductile Iron

• Valve Seat: Technopolymer

• Diaphragm: Vulcanized Rubber

• Temperature range: -40°F to +140°F (carbon steel), -4°F to +140°F (cast iron)

• Conforms to EN 334, UNI 8827, and ANSI B16.5 standards