JAMES M SUDOLNIK
Engineering in Lunenburg, MA
License number
Massachusetts 34687
Issued Date
Jun 23, 1989
Expiration Date
Jun 30, 1992
Type
Safety Engineer
Address
Address
Lunenburg, MA 01462
Personal information
See more information about JAMES M SUDOLNIK at radaris.comName
Address
Phone
247 Highland St, Lunenburg, MA 01462
Lunenburg, MA
247 Highland St, Lunenburg, MA 01462
Professional information
Steam Valve With Variable Actuation Forces
US Patent:
4928733, May 29, 1990
Filed:
Apr 26, 1989
Appl. No.:
7/343236
Inventors:
James M. Sudolnik - Lunenburg MA
Stephen R. Prince - Fitchburg MA
Stephen R. Prince - Fitchburg MA
Assignee:
General Electric Company - Schenectady NY
International Classification:
F16K 100
US Classification:
13763013
Abstract:
A valve includes a device for reducing the force required beyond cracking, thereby reducing the size of actuating equipment. A balance chamber includes two effective diameters. A smaller diameter is operative during cracking, in order to maintain positive control of the valve. Later, a larger balance diameter is effective, in order to reduce the actuation forces required beyond the cracking position. A pilot valve is opened during initial actuation. Once the pilot valve is fully opened, a main valve is opened. A dual-diameter balance chamber is effective, during initial opening of the main valve, to require substantial opening forces. Then, when the main valve reaches a predetermined distance from its seat, the second effective diameter increases the balance area to reduce the valve actuating forces required.