High Purity Analytical Regulators are for pressure control of high purity, non-corrosive pure and mixed gas application. It is designed to minimize outgassing and inboard diffusion through the use of stainless steel convoluted diaphragms and high purity seats and seal rings. These regulators contain a self-resetting safety relief valve vented to atmosphere to protect from over-pressurization. Available with optional needle valves and multiple configurations.