The ESAB 999861 Low Temperature Diaphragm is a critical replacement component designed to restore the functionality and accuracy of industrial gas regulators. In the physics of pressure regulation, the diaphragm acts as the primary sensing element, balancing the force of the adjusting spring against the outlet pressure of the gas. When this component is compromised—whether through age, chemical exposure, or thermal stress—the regulator's ability to maintain a steady delivery pressure is lost. This specific model is engineered with a proprietary elastomeric compound that exhibits a lower glass transition temperature than standard diaphragms, allowing it to retain flexibility and responsiveness even in sub-zero conditions.
Standard rubber components can become rigid and brittle when exposed to extreme cold, leading to hysteresis in the regulator's performance. This manifests as "pressure creep," where the outlet pressure slowly rises when the downstream flow is stopped, or as erratic flow rates during operation. The ESAB 999861 addresses this by utilizing materials that resist stiffening, ensuring that the valve seat opens and closes smoothly in response to demand changes. This is particularly vital for applications involving carbon dioxide (CO2), where the Joule-Thomson effect can cause rapid cooling of the regulator body, or for field operations in winter climates.
Integrating genuine OEM parts like the 999861 ensures that the safety factors and performance curves of the original equipment are maintained. Generic substitutes often lack the precise thickness and modulus of elasticity required to match the spring rate of the regulator, potentially leading to unsafe operating conditions. By choosing this genuine ESAB part, maintenance personnel can guarantee that the regulator will perform within its specified tolerances, providing safe and reliable gas control for welding, cutting, and heating processes.
| Additional Information |
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| Packaging Description:1 Per Ea, pack of 1 |
| Product Type:Replacement Diaphragm |
| Temperature Rating:Low Temperature |
| Material:Specialized Elastomer |
| Application:Equipment Repair, Gas Regulation |
