Tassalini piston check valves are stainless steel non-return valves designed to prevent backflow in liquid process lines. The valve opens when upstream pressure exceeds the spring set pressure; closure occurs when pressures equalize or downstream pressure increases, seating the piston against the seat.
Maximum product pressure: 10 bar. Valve operating temperature: -10 °C to +95 °C. Seal temperature limits: PTFE up to +150 °C, EPDM up to +140 °C, silicone up to +200 °C, FTM up to +220 °C. Closure test at 0.7 bar; body test at 15 bar.
Available in DN10–DN100 and ½"–4". End connections: butt weld, formed ends, threaded, and union. Supported standards: DIN, SMS, RJT BS, IDF ISS, and Clamp.
Suitable for food, beverage, dairy, pharmaceutical, and general clean liquid lines requiring non-return function with in-line cleanability. The large flow cross-section allows passage of small solids, provided compatibility with seat and spring materials.
Can these valves be installed horizontally?
Yes. Low-pressure springs permit both horizontal and vertical installation.
What parameters must be specified for selection?
DN, connection standard, body material, sealing material, operating temperature, product viscosity, and required opening pressure.
Our check valves are manufactured from Aisi 304L and Aisi 316L stainless steel and are of high strength construction from a solid stainless steel block.
The valves are equipped with low-pressure springs allowing either vertical or horizontal valve operation. The wide head seal opening permits passage of solid particles.
The standard finish is 120 grit (Ra 1.01-1.14 µm max).
The maximum operating pressure is 10 bars.
