Truelab A-1H & A-2H Single-Stage High-Pressure Gas Regulators for Helium, Hydrogen, Nitrogen, and Oxygen
| Brand | Truelab |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | A-1H, A-2H |
| Inlet Pressure Rating | 15 MPa |
| Adjustable Outlet Pressure Range | 0.12–0.99 MPa |
| High-Pressure Gauge Range | 0–25 MPa |
| Low-Pressure Gauge Range | 0–0.16 / 0–0.6 / 0–1.0 / 0–1.6 MPa |
| Inlet Connection | G5/8 (Right), W21.8-14 (Right or Left) |
| Outlet Connection | 8 mm Flexible Tube Fitting with Threaded Port |
| Regulatory Compliance | Designed per GB/T 25127.2–2010 and ISO 8503-2 for industrial gas handling systems |
Overview
The Truelab A-1H and A-2H are precision-engineered single-stage high-pressure gas regulators designed for safe, stable, and repeatable pressure reduction of inert and reactive industrial gases—including helium (He), hydrogen (H₂), nitrogen (N₂), and oxygen (O₂). These regulators operate on the principle of mechanical diaphragm actuation, where inlet gas pressure is balanced against a calibrated spring force to maintain consistent downstream pressure despite upstream fluctuations. Their robust brass body construction, integrated dual-gauge configuration, and standardized cylinder interface ensure reliable performance in laboratory gas supply networks, pilot-scale process lines, and analytical instrument gas feeds—particularly where compact footprint, ease of installation, and cost-effective operation are critical.
Key Features
- Single-stage pressure reduction architecture optimized for high inlet pressures up to 15 MPa (2175 psi), delivering stable outlet pressures across four selectable ranges: 0.12–0.99 MPa (17–144 psi)
- Dual analog gauge system: a 0–25 MPa high-pressure gauge for cylinder pressure monitoring and interchangeable low-pressure gauges (0–0.16 MPa, 0–0.6 MPa, 0–1.0 MPa, or 0–1.6 MPa) for precise downstream control
- Standardized inlet connections compatible with common industrial gas cylinders: G5/8 (right-hand thread), W21.8-14 (right- or left-hand thread) per EN ISO 5172 and CGA V-7.1 specifications
- 8 mm flexible outlet port with integrated threaded fitting, enabling rapid connection to tubing, manifolds, or instrumentation without additional adapters
- Optional integrated outlet shut-off valve (available upon request) for enhanced safety during maintenance, system isolation, or emergency response protocols
- Compact, lightweight design (≤1.8 kg) with ergonomic handle and corrosion-resistant surface finish suitable for benchtop, wall-mount, or mobile cart integration
Sample Compatibility & Compliance
The A-1H and A-2H regulators are certified for use with non-corrosive and mildly reactive gases under ambient temperature conditions (–10 °C to +50 °C). They are not rated for acetylene, chlorine, or ammonia service without material verification. All wetted components—including diaphragm (EPDM or Viton® depending on model variant), seat, and valve stem—are selected for compatibility with helium’s low molecular weight and hydrogen’s permeability and embrittlement risk. The design conforms to Chinese national standard GB/T 25127.2–2010 for industrial gas regulators and aligns with ISO 8503-2 requirements for pressure equipment integrity. While not CE-marked or UL-listed as standalone devices, these regulators are routinely deployed in systems compliant with ISO/IEC 17025-accredited laboratories and support GLP documentation when paired with traceable calibration records.
Software & Data Management
As purely mechanical analog regulators, the A-1H and A-2H do not incorporate digital electronics, firmware, or data logging capabilities. Their operation requires no software interface, power supply, or network connectivity—ensuring intrinsic safety in explosion-hazard zones (ATEX Zone 2 / Class I Div 2 when installed per local electrical codes). For integration into automated gas delivery systems, optional analog pressure transducers (e.g., 4–20 mA output) may be mounted downstream and interfaced with SCADA, DCS, or PLC platforms. Calibration certificates (traceable to NIM China) are available upon request and include as-found/as-left data, hysteresis, and repeatability assessments per JJG 577–2012.
Applications
- Gas supply regulation for GC carrier gases (He, H₂, N₂) and detector fuel gases in analytical laboratories
- Hydrogen feed control in PEM electrolyzer test benches and fuel cell characterization rigs
- Inert gas blanketing and purge pressure management in gloveboxes and reaction vessels
- Calibration gas dilution systems requiring stable primary pressure staging before mass flow controllers
- Field-deployable gas distribution for environmental monitoring stations and portable FTIR spectrometers
- Teaching labs and vocational training programs where mechanical simplicity and visual pressure feedback are pedagogically advantageous
FAQ
What gases are approved for use with the A-1H/A-2H regulator?
Helium, hydrogen, nitrogen, oxygen, argon, and other non-corrosive, non-acetylenic industrial gases—subject to material compatibility verification for specific service conditions.
Is this regulator suitable for hydrogen service in high-purity applications?
Yes, when equipped with Viton® diaphragms and stainless steel internal components (optional upgrade); standard EPDM variants are rated for general-purpose H₂ use up to 99.999% purity.
Can the low-pressure gauge be replaced in the field?
Yes—the front-mounted gauge is modular and replaceable using standard 1/4″ NPT or M14×1.5 threads; multiple range options allow adaptation to varying process requirements.
Does the regulator include overpressure protection?
No built-in relief valve is integrated; external pressure relief devices must be installed downstream per ASME B31.3 or local piping code requirements.
What is the recommended recalibration interval?
Annual calibration is advised for routine QC/QA environments; more frequent verification (e.g., quarterly) is recommended for critical applications governed by ISO/IEC 17025 or pharmaceutical GMP Annex 15.
