Chubai BA-1H / BA-2H Stainless Steel High-Purity Gas Pressure Regulator (for H₂, He, N₂)

Overview

The Chubai BA-1H and BA-2H stainless steel high-purity gas pressure regulators are engineered for precision delivery of non-corrosive industrial and research-grade gases—including hydrogen (H₂), helium (He), nitrogen (N₂), and their binary or ternary mixtures—in laboratory, analytical instrumentation, semiconductor fab support, and pilot-scale chemical process environments. These regulators operate on a direct-acting diaphragm-controlled principle, where inlet pressure is reduced and stabilized via a balanced stainless steel poppet valve actuated by a preloaded stainless spring and reinforced elastomer diaphragm. Unlike conventional brass-bodied regulators, the BA-1H/BA-2H integrates 316L stainless steel for all wetted internal components—including seat, stem, filter housing, and gauge enclosure—ensuring minimal metallic leaching, low particle generation, and long-term compatibility with ultra-high-purity (UHP) gas streams (≥99.9999% purity). The design conforms to fundamental requirements of gas purity management systems defined in ASTM E2498-22 and supports traceability under GLP-compliant workflows when paired with calibrated pressure gauges and documented leak test reports.

Key Features

• Wetted materials fully compliant with SEMI F57: 316L stainless steel valve seat, stem, filter housing, and pressure gauge casing; oxygen-cleaned and passivated per ASTM A967
• Integrated sintered stainless steel filtration (≤5 µm pore size) optimized for domestic cylinder particulate profiles, reducing downstream contamination risk in GC, ICP-MS, and fuel cell testing setups
• Helium mass spectrometry verified sealing performance: external leakage ≤1×10⁻⁹ Pa·m³/s He; internal leakage ≤1×10⁻¹⁰ Pa·m³/s He (certified per ISO 15848-1)
• Dual-side panel-mounting hardware enables flush installation in gas cabinets, analyzer enclosures, and modular skid systems without field modification
• JAPAN MODEL φ50 mm analog pressure gauge with Class 1.6 accuracy (EN 837-1), zero-adjustable, glycerin-filled for vibration damping and thermal stability
• Full ultra-pure water (18.2 MΩ·cm) + ultrasonic cleaning protocol applied post-assembly, validated via IC-MS residual ion testing per USP

Sample Compatibility & Compliance

The BA-1H and BA-2H are certified for use with non-corrosive, non-reactive gases only—specifically H₂, He, N₂, Ar, O₂ (dry), CO₂ (anhydrous), and common inert carrier blends. They are not rated for chlorine, ammonia, hydrogen sulfide, silanes, or other halogenated or acidic gases. All elastomers meet FDA 21 CFR 177.2600 specifications for gas contact; diaphragms utilize fluorosilicone (FVMQ) for broad temperature resilience and low outgassing. Regulatory alignment includes ISO 8573-1:2010 Class 1 for solid particles (≤0.1 µm), ASTM E2498-22 Annex A2 for regulator qualification in UHP systems, and mechanical safety per PED 2014/68/EU (Category IV, Group 1G). Each unit ships with a factory-issued helium leak test certificate and material traceability report.

Software & Data Management

As a mechanical analog regulator, the BA-1H/BA-2H requires no firmware, embedded software, or digital interface. However, its design supports integration into digitally monitored gas delivery systems via optional analog pressure transducer retrofits (e.g., 4–20 mA output modules compatible with PLCs or SCADA platforms). Calibration records—including initial gauge verification and leak test data—are provided in PDF format with batch-specific serial numbers, enabling audit readiness for ISO/IEC 17025-accredited laboratories and FDA 21 CFR Part 11–aligned environments where manual logbooks are maintained.

Applications

• Gas supply regulation for GC-FID/TCD, GC-MS, and LC-MS carrier and purge gas lines
• H₂ pressure control in PEM electrolyzer test benches and fuel cell characterization rigs
• He flow stabilization in cryogenic vacuum systems and residual gas analyzers (RGAs)
• N₂ blanketing and purging in pharmaceutical lyophilization and API synthesis reactors
• Calibration gas manifold regulation in environmental monitoring stations (EPA Method TO-15, ASTM D6420)
• UHP nitrogen supply for semiconductor photolithography tool purge zones

FAQ

Are BA-1H and BA-2H suitable for oxygen service?
Yes—provided the oxygen is dry (<5 ppm H₂O), oil-free, and delivered at ≤10 MPa inlet pressure. Units intended for O₂ must be cleaned per CGA G-4.1 and marked accordingly.
Can these regulators be used with compressed air?
They are not recommended for general compressed air due to moisture, oil aerosols, and particulate content exceeding ISO 8573-1 Class 1 limits; dedicated air regulators with coalescing filters should be used instead.
Is customization available for higher outlet pressure ranges?
Standard models support up to 1.6 MPa outlet; custom spring packs enabling 3.0 MPa outlet are available upon engineering review and additional qualification testing.
What documentation accompanies each unit?
Each shipment includes a Certificate of Conformance, Helium Leak Test Report (per ISO 15848-1), Material Traceability Sheet (MTR), and SEMI F57 Cleaning Validation Summary.
Do you provide calibration services?
Factory calibration of the integrated pressure gauge is performed pre-shipment; third-party accredited calibration (e.g., ISO/IEC 17025) can be arranged through authorized metrology partners upon request.