Diaphragm valve with improved sealing performance and leak detection

By introducing a rigid sealing plate and a crack detector into the two-flap diaphragm valve, the problem of external leakage and fault detection caused by the fastener torque of the traditional two-flap diaphragm valve is solved, achieving higher sealing performance and real-time detection capabilities, and improving Improve equipment reliability and production efficiency.
CN102597585AInactive Publication Date: 2012-07-18MERCK & CO INC
9 Cites 13 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
MERCK & CO INC
Publication Date
2012-07-18
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

Diaphragm valve with internal leak detection and improved external leak sealing performance. In diaphragm valves comprising diaphragms that have shields and backings, a rigid seal plate interposed between the shield and backing prevents peripheral regions of the shield from cold-flowing into the backing, despite the compression forces produced by tightening the fasteners that secure the diaphragm to the valve's bonnet assembly and body. An access port passing through the seal plate provides an interface between a void located between the shield and the backing and a breach detector. The breach detector is configured to detect pressure, volume, moisture or mass deviations in fluid disposed in the void, and the deviations indicate whether there's a rupture in the shield or the backing. The breach detector can be connected to an alarming device or signaling system to provide warnings and alerts to valve operators, process control panels or data communications networks.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] Embodiments of the present invention generally relate to two-plate diaphragm valves commonly used as flow control or shutoff valves in various process applications and industries, including but not limited to food and beverage, pharmaceutical, and bioengineering. More particularly, the present invention relates to methods and apparatus for preventing and detecting leaks, ruptures or other diaphragm failures in such two-petal diaphragm valves. Background technique

[0002] Diaphragm valves (or membrane valves) are commonly used to start, stop, and / or control the flow of process fluids (eg, gases, liquids, or slurries) through process systems, or to create or control vacuum spaces in process systems. In general, a diaphragm valve consists of a valve body with an internal flow path between two or more ports, a flexible diaphragm, a compressor that pushes and stretches the flexible diaphragm across the internal flow path, and a "saddle" or The "seat", the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More