Fisher 67AFR/224 PRESSURE REGULATOR 67AFR224 250PSI 5 35PSI 0-35 PSI

The Fisher 67AFR/224 is a high-performance, pilot-operated pressure reducing regulator designed for reliable and precise control of gases or liquids in industrial applications. Its robust construction and internal design make it suitable for demanding services where consistent downstream pressure is critical, even with varying flow rates or fluctuating inlet pressures.

Key Features & Specifications:

Model: 67AFR/224

Type: 67AFR series, Size 2 (2" NPT) with a 224 Pilot assembly. The "R" indicates a pressure reducing regulator.

Maximum Inlet Pressure (P1): 250 PSI - The highest pressure that can be safely applied to the regulator's inlet.

Outlet Pressure Range & Set Point: 0 - 35 PSI - The downstream pressure can be adjusted within this range. The pilot mechanism (224) is calibrated for this specific range.

Pilot Spring Range: 5 - 35 PSI - This refers to the adjustable range of the spring in the controlling pilot, which directly determines the set point of the outlet pressure.

Operation: It is a pilot-operated regulator. This means it uses a small, sensitive pilot device (the 224 pilot) to sense downstream pressure and control the main valve. This design provides excellent accuracy, responsiveness, and capacity compared to direct-operated regulators, especially for larger lines or higher flows.

Typical Construction: The main valve body is typically cast iron or ductile iron, with trim materials (seat, plug) suitable for general service. The 224 pilot is a compact, diaphragm-actuated controller.

Flow Characteristic: Provides high flow capacity with droop (offset) characteristics common to this regulator type, meaning the outlet pressure will drop slightly from the set point as flow increases.

How It Works (Simplified):

The desired outlet pressure is set on the adjusting spring of the 224 pilot.

The pilot senses the actual downstream pressure.

If downstream pressure deviates from the set point, the pilot automatically adjusts the pressure loading on the main valve diaphragm.

This action opens or closes the main valve, modulating flow to maintain a steady downstream pressure.

Common Applications:

Natural gas distribution: Station inlet/outlet control, district regulator service.

Industrial process lines: Controlling air, nitrogen, or other gases to processes, heaters, or machinery.

Utility and OEM equipment: Used as a reliable component within larger systems requiring precise pressure control.

In summary, the Fisher 67AFR/224 is a heavy-duty, pilot-operated pressure reducing regulator capable of handling inlet pressures up to 250 PSI and precisely maintaining an adjustable outlet pressure between 0 and 35 PSI, making it a standard workhorse for industrial gas and liquid pressure control.