The Siemens 63BD is a constant differential controller designed for maintaining consistent downstream pressure in various industrial applications. Featuring a durable brass body and a neoprene diaphragm, this device ensures reliable performance under pressure. It operates with a maximum open needle valve pressure of 250 PSIG and can handle up to 100 PSIG when the needle valve is closed. This model comes without additional options, providing a straightforward solution for pressure control needs. Distributed by BSP Automation, the 63BD is a solid choice for systems requiring precise pressure regulation.