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1. (WO2018164848) SPRING SEAT FOR AN INTERNAL VALVE

Pub. No.:    WO/2018/164848    International Application No.:    PCT/US2018/019162
Publication Date: Fri Sep 14 01:59:59 CEST 2018 International Filing Date: Fri Feb 23 00:59:59 CET 2018
IPC: F16K 39/02
F16K 17/30
F16K 31/524
Applicants: EMERSON PROCESS MANAGEMENT REGULATOR TECHNOLOGIES, INC.
Inventors: LI, Li
CHEN, Jing
JI, Feifei
Title: SPRING SEAT FOR AN INTERNAL VALVE
Abstract:
An internal valve includes a valve body (110), a valve stem (106), a poppet valve (102), and a bleed valve (104). The bleed valve includes a body with a bore. A spring seat (194) fits within the bore and is coupled to the valve stem, and includes a guide sized to receive the valve stem and a flow aperture. The flow aperture defines a connecting bleed path that fluidly connects a bleed flow path and a bleed outlet. The valve stem shifts from a first position where the poppet valve and the bleed valve are closed, to a second position where the bleed valve is open and the poppet valve is closed, and a third position where the poppet valve is open and the bleed valve is closed. A spring (148) disposed in the bore bears against the spring seat and is arranged to close the poppet valve and open the bleed valve.