MSA 467895 .25 Liters/Min Flow Control Regulator With HONEYWELL 02000 A 1645

Honeywell Analytics 02000-A-1645 Calibration Gas Flow Housing Assembly

467895 Model RP Fixed Flow Regulator, 0.25LPM by MSA

This is a Calibration Gas Regulator Assembly. Its primary function is to safely reduce a high pressure from a gas cylinder (e.g., 500-2000 PSI) to a very low, precise, and stable outlet flow rate, typically 0.25 Liters per Minute (L/min), for the purpose of calibrating gas detectors.

The assembly consists of two main parts:

1. An MSA-specific flow control valve and housing (Part # 467895).

2. A Honeywell pressure regulator that serves as the first-stage pressure reduction.

This is a common configuration where a specialty safety company (MSA) uses a high-quality component from a specialist manufacturer (Honeywell) to create a complete, reliable system.

Component Breakdown

1. MSA 467895

• Manufacturer: MSA Safety (A leading global manufacturer of safety equipment).

• Part Number: 467895. This is MSA’s proprietary part number for this specific assembly or kit.

• Function: This part of the assembly is the flow control valve and outlet. It takes the medium pressure from the Honeywell regulator’s output and precisely meters it down to the critical 0.25 L/min flow rate required for calibrating gas monitors. It likely includes the fitting that connects directly to the gas detector’s calibration port.

• Application: Used exclusively for calibrating MSA brand portable and fixed gas detection instruments with the appropriate calibration gas.

2. HONEYWELL 02000 A 1645

• Manufacturer: Honeywell (A major multinational conglomerate, known for its high-quality controls and instrumentation).

• Part Number / Model: This number (02000 A 1645) identifies a specific model within Honeywell’s line of miniature gas pressure regulators.

• Function: This is the first-stage, pressure-reducing regulator. Its job is to take the potentially dangerous high pressure from the gas cylinder and reduce it to a much lower, safer, and more manageable “intermediate” pressure (often in the range of 25-50 PSI). This stable intermediate pressure is then fed into the MSA flow control valve for final metering.

• Key Features: Honeywell regulators like this are known for being compact, reliable, and providing a stable output pressure, which is essential for achieving an accurate final flow rate.

3. .25 Liters/Min Flow Control

• Specification: This is the most critical performance characteristic of the entire assembly.

• Function: The assembly is designed and fixed to deliver a constant 0.25 Liters per Minute of gas. This flow rate is an industry standard for “bump testing” and calibrating many types of diffusion-based gas detectors. It ensures the correct volume of gas is delivered to the sensors for an accurate calibration.