At Freshford, we provide premium made to order gas equipment mainly regulators specifically designed for laboratories and universities across the country. Partnering with Hi-Lo UK, manufacture based in Sheffield that prides itself on British manufacturing and has a full range of gas control equipment made in Sheffield. We also stock Gas Arc, one of the worlds largest gas control equipment companies. That includes a product range of regulators, outlet points, control panels, header rails and manifold & pipeline accessories.
Most laboratory gas users will have to use some equipment to control pressure and/or flow rate. Pressure regulators will usually be central to the safe delivery of the gas. They prevent system over pressurisation when valves are closed downstream of supply. Regulators can be single-stage or two-stage. A single-stage regulator will accept a high variable inlet pressure and allow adjustment of lower steady outlet pressure. Unfortunately in the case of permanent and dissolved gases, single-stage regulators can exhibit a tendency to rising outlet pressure as the cylinder they are connected to empties.
As the cylinder empties the regulator valve spring pushes the valve further open. If a steady outlet pressure is needed this can be at least troublesome. Liquefied gases have less tendency to this problem as the single-stage regulator accepts vapour pressure which varies with ambient temperature, not cylinder contents.
Consequently, two-stage regulators are favoured for:
- Steady outlet pressure
- Finer control over outlet pressure
These benefits are achieved by having two regulators joined in series within one piece of equipment. A tied diaphragm means that as the user closes the regulator down a positive (rather than passive) force is exerted automatically on the valve, ensuring positive shut-off.
Visit our educational page for help and advice regarding gas control equipment. It is full of useful information and has downloadable content covering all you need to know about regulators. Alternatively, you can contact us by visiting our contact page where we will reply within 48hours.