---
publication_id: "OT-2026-000000210"
title: "Double bellows valve for preventing undesired valve failure positions"
published_at: "2026-09-15T19:02:36.828653Z"
canonical_url: "https://opentechnical.org/p/OT-2026-000000210"
categories:
  - "industrial-motion-power-transmission/fluid-power"
keywords:
  - "f16k1/36"
  - "f16k31/126"
---

# Double bellows valve for preventing undesired valve failure positions

## Abstract

A gas turbine engine includes a combustor and a valve coupled to the combustor. The valve includes a valve body, a valve stem, and an actuator. The valve body is formed to define an air chamber. The valve stem is movable between a closed position and an open position. The actuator is configured to move selectively the valve stem between the closed position and the open position.