Chem Master SGS621 6 Port Cylinder Regulator for Corrosive, Toxic & High Purity Gases
- Single-stage piston cylinder regulator for corrosive, toxic, and high-purity gases
- Six-port configuration with 1/4″ NPT Female connections and side entry
- Maximum inlet pressure 300 bar, delivery pressure range 20 bar
- Handles gases up to grade 6.0 purity (99.9999%)
- 316L stainless steel body, weighs 1.4 kg, operates -20°C to +60°C

The Chem Master SGS621 is a high-performance single-stage piston cylinder regulator, expertly designed for the primary pressure control of corrosive, toxic, and high-purity gases up to grade 6.0 purity (99.9999%).
This regulator is a perfect fit for applications where slight pressure variations due to decreasing cylinder pressure are acceptable.
With its robust design and versatile features, it is highly suitable for a wide range of industrial, laboratory, and medical applications.
Features & Benefits
- Six-Port Configuration: Provides extensive connection flexibility, accommodating various installation requirements.
- Front and Rear Panel Mounting Capabilities: Offers diverse mounting options, facilitating easy integration into different system layouts.
- Encapsulated Seat Design & Low Wetted Surface Area: Ensures minimal contamination risk, crucial in handling high purity gases.
- Full Range of Inlet and Outlet Fittings: Enhances adaptability to different gas types and connections.
- Side Entry Configuration: Allows for straightforward and efficient connection setups.
Typical Applications
- Industrial Processes: Ideal for processes involving corrosive or toxic gases.
- Laboratories: Suitable for research environments where precision and gas purity are paramount.
- Medical Applications: Reliable for medical gas systems, where safety and accuracy are critical.
| Maximum Inlet Pressure | 300 bar (4350 PSI)* |
| Delivery Pressure Range | 20 bar (300 PSI) |
| Helium Leak Integrity | 1 x 10-9 mbar l/s |
| Weight | 1.4 kg (3.1 lb) ** |
| Gauges | 50mm (2″) Diameter |
| Temperature Range | -20°C to +60°C (-4°F to +140°F) |
| Ports | 1/4″ NPT Female |
| Port Configuration | 6 Port |
| Body | 316L Stainless Steel |
| Bonnet | Nickel Plated Brass Barstock |
| Piston | 316L Stainless Steel |
| Seal | FKM |
| Valve Seat | PCTFE |
| Filter | 10 Micron 316L Stainless Steel |
* Subject to cylinder connection ** Cylinder Connection not included
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 |
| Entry Point | Side Entry |
| Inlet Connection | 1/4” NPT |
| Outlet Connection | 1/4" NPT |
| Inlet Pressure | 300 bar |
| Outlet Pressure | 20 bar |
| Purity Grade | Grade 6.0 |
| Stages | Single Stage |
| Gas Type | Corrosive/Toxic |
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.
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