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1. (WO2017039731) HIGH FLOW SPOOL VALVE

Pub. No.:    WO/2017/039731    International Application No.:    PCT/US2015/062210
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Tue Nov 24 00:59:59 CET 2015
IPC: F16K 11/07
Applicants: AUTOMATIC SWITCH COMPANY
Inventors: CHAUDHRY, Ahmad Abbas
HARSHA, Narasimharajpur Devappa
VOLZ, Gregory James
Title: HIGH FLOW SPOOL VALVE
Abstract:
The present disclosure provides a high flow coefficient spool valve (50) through one or more changes in the flow path from a conventional spool valve. The body (56) of the spool valve includes spherically contoured internal grooves (68). The spool (58), slidably engaged inside the body (56), includes concave surfaces between seals (62) that is complementary to the spherically shaped internal grooves (68) of the body. The spherical shape of the body internal grooves (68) and/or concave shape of the spool allow more volume and more laminar flow therebetween, resulting in an increased flow coefficient and flow capacity. The body also is formed with transverse port windows in the port that contour into a bore of the body adjacent the spool. A choke volume in the flow is strategically designed in a parallel flow location rather than a perpendicular flow location to promote laminar flow and lessen turbulence to also increase the flow coefficient.