Versatile Double-Stage Regulator Valve for High-Purity Laboratory Gas Systems with Precise Flow Control

Product Description:

The versatile double-stage regulator valve is a high-precision instrument designed for sensitive laboratory and analytical gas systems where consistent pressure and ultra-pure gas delivery are non-negotiable. This sophisticated pressure regulator differs from single-stage models by incorporating two separate reduction stages within a single unit. The first stage handles the high, fluctuating pressure from the gas cylinder, reducing it to a constant intermediate pressure. The second stage then fine-tunes this pressure to a precise, stable output for the application. This two-stage process eliminates "creep," a phenomenon where the delivery pressure slowly increases as the cylinder empties, ensuring unwavering pressure control for critical processes like gas chromatography, mass spectrometry, and cell culture incubation. The valve assembly is constructed from 316L stainless steel and equipped with metal-to-metal seals to guarantee the integrity of high-purity or specialty gases.

Production of this regulator valve occurs in a controlled environment that meets cleanroom standards to prevent particulate contamination. The machining of the internal components, particularly the diaphragms and nozzles, is performed to microscopic tolerances. A key feature is the finely threaded adjustment knob that allows researchers to make minute adjustments to the output pressure. Each regulator is assembled by trained technicians and undergoes a rigorous multi-point test to verify its accuracy, stability, and leak integrity across its entire pressure range. For laboratory managers and researchers, this valve is not just a component; it is the foundation of experimental reproducibility, providing the stable gas conditions required to generate accurate and reliable scientific data.

Bullet Points:

Dual-Stage Pressure Control: Provides exceptionally stable outlet pressure unaffected by declining inlet pressure from the gas cylinder.

High-Purity Gas Delivery: Constructed from 316L stainless steel with ultra-clean finishes to prevent gas contamination.

Precise Flow Adjustment: Features a finely threaded control knob for accurate and repeatable pressure settings.

Built-In Gauges: Includes both high-pressure (cylinder pressure) and low-pressure (delivery pressure) gauges for clear system monitoring.

CGA Specific Outlets: Available with various Compressed Gas Association (CGA) inlets to ensure compatibility with specific high-purity gases.

Specific Application Scenario:
In a pharmaceutical research lab, a scientist uses a hydrogen gas cylinder equipped with this regulator to fuel a Gas Chromatograph (GC). The double-stage design ensures the hydrogen carrier gas flow to the GC column remains perfectly constant throughout the entire sequence of samples, which is critical for obtaining accurate retention times and reproducible results.

Specifications:

Exhibition:

We often go to India, Mexico, Algeria for aerosol valve exhibitions. Our potable butane gas stove valves have been exported to Mexico, Ecuador, Viet Nam, India, Colombia, Russia, Ukraine, Indonesia, Peru, Philippines and other countries.

Packing and Delivery

Carton size: 560*370*220mm

Gas valve: 1500 pieces / carton

Red cover: 2500 pieces / carton

We can export the portable gas stove valves to you by LCL container and full 20ft, 40ft, 40HC container. We can use carton packing and pallet packing.

FAQ:

1. Why is a double-stage regulator valve necessary for my lab equipment?

   • Single-stage regulators exhibit "creep," where the outlet pressure rises as the cylinder pressure falls. Double-stage regulators compensate for this, providing a constant outlet pressure from a full cylinder to an empty one, which is essential for sensitive analytical instruments.

2. How does this valve ensure high-purity gas delivery?

   • The use of 316L stainless steel, which has excellent corrosion resistance, along with special cleaning processes (electropolishing, passivation) and metal diaphragms, minimizes the risk of the regulator introducing contaminants into the gas stream.

3. What is the difference between a regulator and a simple cylinder valve?

   • A basic cylinder valve is just an on/off switch. A pressure regulator is a control device that reduces the high, variable pressure from the cylinder to a lower, stable, and usable pressure for an application.

4. Can one regulator be used for different types of gases?

   • No. Regulators are gas-specific due to material compatibility and safety standards. Using a regulator for the wrong gas can be dangerous. They are designated by CGA connection numbers specific to each gas service (e.g., CGA 580 for Argon, CGA 350 for Hydrogen).

5. How do I know what CGA inlet this pressure regulator has?

   • The CGA number is stamped directly on the valve body or on a metal tag attached to the regulator. It is crucial to specify the correct CGA number when ordering to match your gas cylinder.