0730-0080 - Victor Stainless Steel Diaphragm Assembly for SR450/SR460 Regulators

Technical Overview of the Victor 0730-0080 Diaphragm Assembly

The Victor 0730-0080 is a precision-engineered diaphragm assembly designed specifically for the high-demand requirements of heavy-duty industrial gas regulators. This component is the heart of the pressure regulation mechanism in Victor's renowned SR 450, SR 460, and SR 700 series regulators. Unlike standard light-duty diaphragms which are often composed of fiber-reinforced neoprene or rubber, this assembly utilizes a high-grade stainless steel diaphragm. This material selection is critical for applications involving high inlet pressures or specific gases where elastomer permeability or chemical compatibility could be a concern.

The assembly functions by balancing the force of the adjusting spring against the outlet pressure of the gas. The stainless steel construction provides a distinct advantage in terms of hysteresis and response time, allowing for extremely stable delivery pressure even as the cylinder pressure decays. Furthermore, the metal diaphragm eliminates the risk of "diaphragm relaxation" or stretching over time, which can lead to pressure drift in softer materials. This part is an exact OEM replacement, ensuring that the regulator maintains its original flow characteristics and safety ratings.

Technicians servicing Victor equipment will appreciate the pre-assembled nature of this unit, which includes the diaphragm plate securely attached. This ensures the correct effective area is maintained for the specific spring rates used in the SR 450 and SR 460 series. Proper installation of this component is vital for correcting common regulator failures such as creeping (where delivery pressure rises when the downstream valve is closed) or external leaking through the bonnet vent. By using genuine Victor parts, operators ensure the longevity of their equipment and compliance with industrial safety standards.

This assembly is suitable for a variety of gas services depending on the specific regulator model it is installed in, but the stainless steel nature makes it particularly robust for oxygen, inert gases, and fuel gas applications found in steel mills, fabrication shops, and heavy construction sites.