Spirax Sarco’s new Spira-Trol general service control valve features a fully modular design engineered for refined performance and wide rangeability in applications including pharmaceutical, rubber, metals, and chemicals. Both ANSI and EN versions share the same internals, and three pneumatic actuators are required for valves up to 4in in size. There are many options within this one body envelope, from low noise and low flow applications, to high temperature and zero emission requirements. The valve incorporates self-aligning and clamp-in-place internals. Its hard trim materials and modular design diffuses the discharge from the plug and seat, as well as reduces internal flow velocities to minimize internal erosion. Standard offering includes cast iron, SG iron, carbon steel, stainless steel or NACE construction; equal percentage, linear or fast-opening flow characteristic; 1/2- to 4in sizes with standard or customer-defined centre face dimensions; and ANSI, PN, JIS, KS, NPT, BSP, or SW connections. Additional valve options include electric, pneumatic, or modulating actuation; external control system interface; noncontact feedback positioners; PTFE chevron and graphite rings; and reduced flow characteristic.
