Pressure-operated valves

ASCO 290 is a 2-way pressure-operated, direct-acting angle seat valve designed for demanding applications.
Valve bodies are available in bronze or stainless steel.
Suitable for general applications (air, inert gases, water, oils, and light slurries), as well as steam, hot water, and auxiliary fluids in the food and beverage industry.
Optional features include visual/electrical position indicators and stroke limiters.

ASCO 390 is a 3-way pressure-operated valve series for industrial liquid media.
Its water hammer-resistant design features fluid inlet under the disc for quiet operation.
Valves offer long service life even in high-cycle applications.
A wide range of piston actuators (diameters 63–90–125 mm) rotate 360° for maximum performance at various minimum pilot pressures.
Ideal for automotive, bottling, commercial laundry, and heating/cooling circuit applications.


ASCO 398 pressure-operated process valves are designed for harsh environments across a wide range of industries.
High-flow valves are built for long life and are highly resistant to thermal shock and corrosive conditions.
Suitable for applications in medical and life sciences, oil & gas, power generation, automotive and tire manufacturing, chemical processing, water and wastewater treatment, food & beverage, and packaging industries.