
Gas Arc Tech Master GA3500 Single Stage Inert Gas Regulator 300 Bar BS341 No.30 Inlet 1/4" NPT Outlet (GPS421-04-13-01-01-021-04-A)
- GA3500 inert gas regulator for non-corrosive or toxic technical grade gases
- Single-stage piston design, 300 bar inlet pressure, 0-250 bar outlet pressure
- Maximum flow 230 m³/hr at 15°C, grade 4.5 purity (99.995%)
- Brass body with FKM seal, weighs 1.8 kg, operates -20°C to +60°C
- BS341 No. 30 inlet connection, 1/4″ NPT male outlet port

The GA3500 Inert Gas Regulator is a robust, high-pressure regulator designed for controlling non-corrosive or toxic, technical grade gases up to grade 4.5 purity (99.995%), featuring a single-stage piston cylinder with an FKM seal.
This regulator is ideal for applications such as high-pressure vessel testing and purging, and is used extensively in industrial, laboratory, and research settings. Its brass construction ensures it can withstand daily use in both cylinder and manifold mounting setups.
Key Features
- 300 Bar Service: Suitable for high-pressure applications.
- Single-Stage Type: Provides stable pressure regulation suitable for technical grade gases.
- Piston Design: Facilitates ease of pressure adjustment.
- Five-Port Configuration: Offers connection flexibility.
- Encapsulated Valve Design: Ensures gas purity by minimizing contamination risks.
- Front & Rear Panel Mounting: Allows versatile installation options.
Typical Applications
- Industrial Processes: Ideal for high-pressure vessel testing and purging.
- Laboratories and Research: Suitable for precise regulation of inert gases in research environments.
- Process Control Applications: Effective for reliable gas control in industrial settings.
| Type | Single-stage |
| Inlet Pressure (max) | 300 bar |
| Outlet Pressure | 0-250 bar |
| Maximum Flow | 230 m³/hr @ 15°C in Air at 300 bar inlet |
| Inlet Connection | BS341 No. 30 – ISO 5145 No. 30 |
| Outlet Port | 1/4″ NPT Male |
| Pressure Adjusting Knob | White |
| Temperature Range | -20°C to +60°C |
| Weight | 1.8 kg (4.0 lb) |
| Designed and Manufactured | in Norfolk, UK. |
| Body | Brass |
| Valve Seat | Nylon |
| Piston | Brass |
| Filter | 316L Stainless Steel |
Please note: If you require a test certificate with your regulator, it must be ordered at the same time. Our certification product can be found here: Gas Arc Regulator Test Certificate
Data Sheet can be found in Documents Section
| Brand | Gas Arc |
| Inlet Connection | BS341 No.30 |
| Outlet Connection | 1/4" NPT |
| Inlet Pressure | 300 bar |
| Outlet Pressure | 250 bar |
| Purity Grade | Grade 4.5 |
| Stages | Single Stage |
| Gas Type | Inert |
Download Datasheet
Download PDFA carriage charge is applied to orders, for standard 1-2 day shipments to mainland destinations within the United Kingdom. Other destinations and premium services are available but subject to additional freight charges.
Gas Arc Tech Master GA3500 Single Stage Inert Gas Regulator 300 Bar BS341 No.30 Inlet 1/4" NPT Outlet (GPS421-04-13-01-01-021-04-A) Get in touch
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