Spirax Sarco’s Spira-Trol general service control valve is of modular design. The two-port valve has been engineered for high performance in a wide range of applications, including food and beverage, pharmaceutical, plastics, chemicals and electronics manufacturing.
The design uses few components to create a flexible and maintainable system where one valve can satisfy the needs of numerous industrial requirements. Both ANSI and EN versions share the same internals, and only three pneumatic actuators are required for valves up to 100 mm 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 modular approach also enhances rapid, worldwide parts availability and supply.
Spira-Trol incorporates self-aligning and clamp-in-place internals for ease of maintenance. Its hard trim materials diffuse the discharge from the plug and seat, as well as reducing internal flow velocities to minimise internal erosion. This ensures long stem seal life and reduces valve maintenance.
Standard offerings include cast iron, SG iron, carbon steel, stainless steel or NACE construction; equal percentage, linear or fast-opening flow characteristic; 15 to 100 mm 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; non-contact feedback positioners; low noise, soft seal or hard facing trims; extended bonnets; PTFE chevron and graphite rings; and reduced flow characteristic.
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