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Click here to find out howE290 Series: Asco piston or angle seat pressure operated valves enable reliable & accurate control in even the most demanding applications and used to control a wide variety of media types. The advantages of the E290 are long service life, robust design particularly recommended for use with steam or corrosive fluids. They have a high flow rate with anti water hammer design. Available in bronze and stainless steel with numerous options & certifications