Hybrid Valve with Variable Performance Curves

Document Type : Original Article

Authors

1 Professor, Dept. of Mech. Power Eng., Helwan University, Cairo, Egypt.

2 Demonstrator, Dept. of Mech. Power Eng., Helwan University, Cairo, Egypt.

3 Assistant professor, Dept. of Mech. Power Eng., Helwan University, Cairo, Egypt.

Abstract

Pipeline valves have been studied extensively to determine their inherent performance characteristics. However, some researchers introduced different internal designs for such valves to achieve the required characteristic. Consequently, this paper presents a new valve concept that consists of two identical portions of global type valves arranged in series configuration. The interaction between the two valve portions achieves an inherent flow coefficient range instead one performance curve. Experimental investigation is herein performed while studying the opening of the two valve portions, the variation of upstream pressure, Reynolds number and pressure loss coefficient. The investigation puts some global guidelines for valve performance and cavitation avoidance.

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