Gas Arc Tech Master GPL421 Single Stage Inert Gas Line Regulator 300 bar 1/4 NPT Inlet G3/8 BSP Outlet
- Single stage piston line regulator for inert gas pressure control up to grade 4.5 purity
- Inlet connection 1/4 NPT Female, outlet connection G3/8 BSP R/H Brass Male
- Four port configuration with front and rear panel mounting capabilities
- FKM seal with 10 micron 316L stainless steel filter, weighs 1.4 kg

Designed for secondary pressure gas control of non-corrosive or toxic, technical grade gases up to grade 4.5 purity (99.995%), on gas distribution systems.
Single Stage Piston Line Regulator, FKM Seal.
Features & Benefits
- Four port configuration
- Front & rear panel mounting capabilities
- Encapsulated seat design
- Low wetted surface area
- Full range of inlet and outlet fittings
- Side entry
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
| Configuration | 4 Port Single Stage Line Regulator |
| Inlet Connection | <=300 bar – 1/4 NPT Female |
| Outlet Connection | 0-50 bar – G3/8 BSP R/H Brass Male |
| Port Size | 1/4″ NPT Female |
| Brand Option | Gas Arc Brand |
Part Number GPL421-04-10-00-01-000-07-A
| Maximum Inlet Pressure | 300 bar (4350 PSI) |
| Delivery Pressure Range | 50 bar (725 PSI) |
| Flow Coefficient (Cv) | 0.1 |
| Weight | 1.4 kg (3.1 lb) |
| Gauge Size | 50 mm (2″) Diameter |
| Operating Temperature Range | -20°C to +60°C (-4°F to +140°F) |
| Body | Brass Barstock |
| Bonnet | Brass Barstock |
| Piston | Brass |
| Seal | FKM (Fluoroelastomer) |
| Seat | Polyamide (Nylon®) |
| Filter | 10 Micron 316L Stainless Steel |
| Brand | Gas Arc |
| Entry Point | Side Entry |
| Inlet Connection | 1/4” NPT |
| Outlet Connection | G3/8" BSP |
| Inlet Pressure | 300 bar |
| Outlet Pressure | 50 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 GPL421 Single Stage Inert Gas Line Regulator 300 bar 1/4 NPT Inlet G3/8 BSP Outlet Get in touch
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