Swagelok B-2MA4 Brass Medium-Flow Angle Pattern Metering Valve

Swagelok B-2MA4 is a precision-engineered medium-flow metering valve designed for accurate regulation of fluid flow in analytical instrumentation, process sampling systems, and general industrial applications. This valve features a brass body construction with an angle pattern configuration and 1/8 in. female NPT end connections.

As part of Swagelok's renowned M Series metering valves, the B-2MA4 provides fine flow control with excellent repeatability, making it an essential component for systems requiring precise adjustment of gas or liquid flow rates.

Key Specifications

Specification Detail

Manufacturer Swagelok Company

Part Number B-2MA4

Valve Type Metering Valve, Medium Flow

Body Material Brass (Silver-Plated Chrome Finish) 

Pattern Angle Pattern 

End Connections 1/8 in. Female NPT 

Stem O-Ring Material Buna N 

Handle Type Standard Knurled Handle 

Flow Capacity Medium Flow (M Series)

Series Designation 2MA4 

Key Features & Benefits

Precision Flow Control

The B-2MA4 features a precision-metering stem that provides smooth, gradual flow rate adjustments. This allows operators to achieve exact flow settings with minimal hysteresis, ensuring consistent system performance and repeatable results.

Durable Brass Construction

Manufactured from high-quality brass with a distinctive silver-plated chrome finish, this valve offers excellent corrosion resistance and durability for general-purpose industrial applications . The robust construction ensures long service life even in demanding environments.

Angle Pattern Design

The angle pattern configuration allows for compact system layouts and improved flow characteristics compared to straight patterns. This design is particularly advantageous in space-constrained installations where piping direction changes are required.

Reliable Sealing

Equipped with a Buna N stem O-ring, the B-2MA4 provides dependable sealing performance across a wide range of temperatures and pressures, preventing leakage and ensuring operator safety.

Industry-Standard Connections

With 1/8 in. female NPT ports, this valve integrates easily into existing piping systems using standard NPT fittings, simplifying installation and maintenance procedures.

Applications

The Swagelok B-2MA4 metering valve is suitable for numerous applications across various industries:

Analytical Instrumentation: Precisely controlling sample flow to analyzers, chromatographs, and spectrometers

Process Sampling Systems: Regulating purge flows and sample stream rates

Chemical Processing: Metering additives, reagents, and small-volume chemicals

Pharmaceutical Manufacturing: Controlling precise fluid delivery in production processes

Laboratory Research: Adjusting gas or liquid flow in experimental setups

Pilot Plants: Fine-tuning process parameters during development

Why Choose the B-2MA4?

Swagelok Quality and Reliability

As a genuine Swagelok product, the B-2MA4 is manufactured to the highest quality standards, backed by ISO certification and Swagelok's reputation for excellence in fluid system components . Each valve undergoes rigorous testing to ensure leak-free performance and long-term reliability.

Proven Design

The M Series metering valves have been field-proven for decades in countless applications worldwide. The B-2MA4 represents a design that balances precision, durability, and ease of use.

Versatile Compatibility

The brass construction makes this valve suitable for a wide range of non-corrosive fluids, including air, inert gases, water, lubricants, and many industrial chemicals. For aggressive media, Swagelok offers equivalent valves in stainless steel (such as the SS-2MA4).

Installation and Maintenance Tips

Ensure piping is clean and free of debris before installation to prevent damage to the valve seat and stem

Verify proper valve orientation—the flow direction arrow indicates correct installation

Apply appropriate thread sealant to NPT connections, avoiding the first thread to prevent sealant from entering the system

Operate the handle smoothly; avoid forcing the valve beyond its fully open or closed positions

Periodically inspect for leaks and verify flow control performance 

Ordering Information

The manufacturer part number for this product is B-2MA4 . For purchasing, availability, and pricing, please contact your local authorized Swagelok sales and service center. Additional specifications and CAD models are available through the Swagelok website and authorized distributors.

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