Patent · US Active

Pressure independent control and balancing valves

US9766632B2 · kind B2 · utility

2Cited by

11References

18Claims

0Family size

Assignee

IMI HYDRONIC ENGINEERING INTERNATIONAL SA · CH

Inventors

Peter Volovec · Kapele, SI
Slavko Lah · Brežice, SI
Gregor Bozic · Krško, SI

Key dates

Filing date	Feb 24, 2014
Grant date	Sep 19, 2017
Priority date	—
Expiry date	May 25, 2034

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/353
WIPO fieldControl
WIPO sectorInstruments

Abstract

A device having pressure independent control and balancing valves, suitable for use in a hydronic system, comprises a seat, a plug having an upstream surface and a downstream surface, and a piston, wherein the seat, plug and piston are aligned coaxially, a controller determines the size of a first flow restriction between the upstream surface of the plug and the seat, the piston is operable to move in response to differential pressure across the first restriction and a predetermined force, the position of the piston relative to the downstream surface of the plug determining the size of a second flow restriction thereby in use maintaining a substantially constant differential pressure across the first restriction.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.