Parker-Hannifin Corporation
Valve comprising a dual piston assembly and method of forming a valve

Last updated:

Abstract:

A valve for a refrigeration system and a method of forming a valve includes a dual piston assembly having an inner piston (44) and an outer piston (42) that are moveable relative to each other to control pressure equalization flow through the valve, and an adjustable control stem (66) engageable with the outer piston that enables a low fluid equalization flow when in a first position and a variably higher fluid equalization flow when in a variable second position. The inner piston has a plurality of bleed orifices (46, 48) that are openable by movement of the outer piston relative to the inner piston.

Status:
Grant
Type:

Utility

Filling date:

19 Dec 2018

Issue date:

28 Jun 2022