51 results about "Diaphragm rupture" patented technology

A hydraulically driven pump includes a first chamber exposed to a process fluid, a second chamber configured to retain a hydraulic fluid, and a multi-layer diaphragm positioned between the first and second chambers. The diaphragm includes a first layer in contact with the process fluid being pumped, a second layer in contact with the hydraulic fluid, and a third layer that includes an elastomeric base material and an elastomeric conductive trace embedded in the elastomeric base material. The third layer is positioned between the first and second layers and being movable relative to the first and second layers. Changes in an electrical resistance of the conductive trace indicate a failure condition in one of the first, second and third layers.

The dual actuator valve of the present invention deploys both the primary and secondary actuator elements in a single, common control chamber. Therefore, the present invention provides a dual actuator valve having dimensions that are the same as, or similar to, the dimensions of a single actuator control valve. It will be appreciated that the actuator elements may be of diaphragm type or piston type actuator elements. The primary actuator element is mechanically linked to the valve plug and regulates the flow though the valve, while the secondary actuator element remains in a fully open position. Should the primary actuator element fail to operate the valve due, for example, to diaphragm rupture, failure of the primary control system, or any other reason, the secondary control system activates the secondary actuator element, which then effects movement of the primary actuator element thereby resuming flow regulation or closure of the valve as necessary.

A dual stage hybrid inflation device includes a first stage gas source including a liquefied gas stored in a first stage pressure vessel and a second stage gas source including a gas generator having a gas output directed into the first stage pressure vessel. The gas generator is isolated from the first stage pressure vessel by a frangible diaphragm that ruptures when the pressure in the gas generator exceeds the pressure in the first stage pressure vessel by a predetermined amount. The gas generator is also isolated from the first stage pressure vessel by an eroding nozzle that temporarily restricts the flow of gas from the gas generator to the first stage pressure vessel after the frangible diaphragm ruptures. The eroding nozzle initially restricts the flow of gas from the gas generator to the first stage pressure vessel to prevent a sudden pressure drop in the gas generator that would cause the pyrotechnic gas generating material to self extinguish. The nozzle then erodes away to allow an unrestricted flow of combustion products from the gas generator to the first stage pressure vessel.

The invention discloses a double-diaphragm rupture warning device of a metering pump. The double-diaphragm rupture warning device comprises a double-diaphragm sealing ring. The double-diaphragm sealing ring is fixed to a position between a pump head and a pump cylinder of the metering pump by the aid of bolts, mounting fixing positions for a pump-head-side diaphragm and a pump-cylinder-side diaphragm of the metering pump are arranged on the double-diaphragm sealing ring, the top of the double-diaphragm sealing ring is used as a pressure output channel and is connected with an adjustable pressure filter valve, an annular pressure sampling pipe clings to the inner side of the double-diaphragm sealing ring, crossed pressure sampling holes are uniformly formed in a pipe body of the annular pressure sampling pipe, the top of the annular pressure sampling pipe is connected onto the pressure output channel of the double-diaphragm sealing ring, the annular pressure sampling pipe is connected with the adjustable pressure filter valve, and various warning monitoring elements are connected to the top of the adjustable pressure filter valve. The double-diaphragm rupture warning device has the advantages that the problem that media or hydraulic oil are contaminated by fillers of an existing double-diaphragm rupture warning device with the fillers after diaphragms rupture can be solved; problems that mistaken warning signals are easily transmitted by an existing vacuumized double-diaphragm rupture warning device and staffs are misled by the mistaken warning signals can be solved.