This isolation/control valve is a critical component of an inert gas supply manifold, serving dual functions. In isolation mode, it provides a positive shut-off to completely stop gas flow to a specific outlet, which is essential for maintenance, safety, or process changes. In control mode, it regulates the flow rate, pressure, or direction of inert gas (such as nitrogen, argon, or carbon dioxide) to downstream equipment. Each outlet typically has its own valve, allowing independent control of multiple gas lines from a common manifold source.
The valve operates through manual, pneumatic, or electric actuation to position a closure element (such as a ball, gate, or globe) within the valve body. In isolation mode, the closure element completely blocks the flow path. In control mode, partial opening modulates flow based on process requirements. The valve interfaces with the manifold outlet connection and downstream piping.
Typical materials include stainless steel (316/304), carbon steel, brass, and PTFE for seals. Key parameters include nominal diameter (15–50 mm, ISO 6708), operating pressure (1.0–1.6 MPa), flow coefficient (Cv 2.5–20, IEC 60534-2-1), leakage rate (0.01–0.05% of rated Cv, IEC 60534-4), operating temperature (-40 to 85°C, ISO 10434), actuation time (2–10 s, IEC 60534-4), supply voltage (24 V DC ±10%, IEC 60534-5), control signal (4–20 mA, IEC 60534-5), enclosure rating (IP54–IP65, IEC 60529), body material (CF8M per ASTM A351), seat material (PTFE per ASTM D4894), and weight (5–25 kg). These values are reference ranges and must be verified for the specific model and application with the legal manufacturer or supplier. Standards listed are procurement references, not certifications.
The valve uses manual, pneumatic, or electric actuation to move a closure element (ball, gate, or globe) inside the body. In isolation mode, the element fully blocks the flow path, providing a tight shutoff. In control mode, the element is partially opened to modulate flow based on process signals. The valve connects to the manifold outlet and downstream piping, with actuation time and leakage rate affecting performance. Selection requires matching nominal diameter, pressure rating, flow coefficient, and materials to the process conditions.
