HARRIS REG 821 PRESET ARG CYL PRESSURE REG FITTED W 2 X 30LP
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Precision gas flow control for TIG welding, MIG welding, and argon purging applications.
The Harris Model 821 is a factory-preset argon cylinder pressure regulator engineered for welders and fabricators who need consistent, reliable shielding gas delivery. Fitted with two 30 LPM (litres per minute) flowmeters, this dual-outlet configuration makes it ideal for simultaneous TIG welding and backing/purging setups — letting you run two separate gas lines off a single cylinder without compromising flow accuracy.
Key Features
- Preset outlet pressure — factory-calibrated regulation (typically 0–400 kPa range) ensures stable, repeatable gas flow without manual adjustment
- Dual 30LP (30 LPM) flowmeters — two independent flow tubes for running two torches, a torch plus a purge line, or backup redundancy
- Rear/vertical cylinder inlet — designed to suit vertical or side-inlet argon cylinders with a Type 10 bottle connection
- Internal safety relief valve — protects the flowmeters and downstream equipment from overpressure
- Field-adjustable flow tubes — flowmeters can be swapped or serviced by the operator using a 17mm spanner, no thread tape required (tighten to ~30 N·m)
- High-pressure inlet gauge — rated up to 24,000 kPa for accurate cylinder content monitoring
- Robust single-stage construction — built in Europe to Harris's industrial quality standard for long service life in workshop environments
Compatible Gases
Argon and Argon/CO2 blends — suitable for MIG and TIG welding, as well as root/backing purge work on stainless steel and exotic alloys.
Typical Applications
- TIG (GTAW) welding shielding gas supply
- Pipe and vessel purging during stainless steel welding
- Dual-torch or torch-plus-purge workshop setups
- General argon/CO2 gas distribution in fabrication shops
Specifications Summary
| Spec | Detail |
|---|---|
| Model | Harris 821 |
| Part Number | 821Z036 |
| Gas Type | Argon / Argon-CO2 |
| Flow Outlets | 2 x 30 LPM flowmeters |
| Inlet | Rear/vertical, Type 10 cylinder connection |
| Safety | Internal relief valve |
| Inlet Gauge Range | Up to 24,000 kPa |
| Output Thread | 5/8" UNF (AS standard) |
| Origin | Made in Europe |
Why Choose the Harris 821 Preset Regulator
With its preset pressure design, the Harris 821 eliminates guesswork — operators get consistent gas flow every time without needing to dial in settings, reducing waste and improving weld quality. The dual-flowmeter configuration makes it a cost-effective choice for shops running multiple gas-fed processes from one cylinder, while the internal safety relief valve and durable European-made build give it the reliability expected in demanding industrial welding environments.