A method of retrofitting an environmental control system of an aircraft includes inserting the orifice plate through the connector slot and the connector ring slot into the receptacle. The method also includes aligning the covering portion with the connector slot.

Plates and plate assemblies for noise attenuators and other devices and methods of making the same are described herein. An example plate assembly includes a support frame to be coupled to a body of the noise attenuator. The support frame has a plurality of radially extending ribs. The plate assembly also includes a disc-shaped plate having a plurality of openings forming flow paths to attenuate noise. The disc-shaped plate is coupled to the support frame such that pressure-induced loads on the disc-shaped plate are distributed to the plurality of radially extending ribs of the support frame.

Air handling system for a climate control system in a housing that includes at least a delimited space with controlled environment, CE space. The air handling system includes an air handling unit, AHU, a pipe system and a perforated plate assembly. The pipe system includes a branched tree-like structure of conduits, that branches in the direction from the air handling unit towards the perforated plate assembly for homogenous distribution of air over the perforated plate assembly such that the air flow through the perforated plate assembly into the CE space is an air flow under laminar flow conditions. Also, a climate system for climate control in such a delimited space, a modular unit including such a delimited space and such a climate system, and an assembly of modular units.

An environmental control system for an aircraft includes a first conduit, a second conduit, and a connector assembly. The connector assembly is coupled to the first conduit and the second conduit for controlling a flow of air. The connector assembly includes a connector, a connector ring, and an orifice plate. The connector includes at least one wall including a ridge defining a receptacle and a connector slot defined within the ridge. The connector ring is attached to the connector and defines a connector ring slot and a covering portion. The connector ring slot aligns with the connector slot and the orifice plate is inserted into through the connector ring slot and the connector slot into the receptacle during installation of the orifice plate. The covering portion covers the connector slot and retains the orifice plate within the receptacle during operation of the environmental control system.

Implementations of an orifice plate configured to regulate a fluid flow are provided. An example orifice plate is configured to be positioned in a conduit and comprises a plurality of holes that extend through the orifice plate. The plurality of holes are arranged to form a criss-crossing pattern of spiral layouts configured to regulate a fluid flow passing therethrough. The number of clockwise spiral layouts is a Fibonacci number and the number of counter-clockwise spiral layouts is a Fibonacci number. In some implementations, each spiral layout is a logarithmic spiral. In some implementations, each hole of the plurality of holes is a contoured conical shape extending between an inlet and an outlet, the inlet is larger in diameter than the outlet.

The hydraulic snubber insert can have an elongated stem and at least one segment extending transversally from the stem, each segment having a size and shape mating a cross-sectional size and shape of the liquid carrying line, and at least one aperture, the insert being configured for the at least one segment to be pushable snugly into the liquid carrying line and pullable out from the liquid carrying line via the stem.

An example fluid manifold, for a fracturing system, includes one or more spool sections and a flow passage at least partially defined by the spool sections that extends along a longitudinal axis. In addition, the manifold includes a first flow altering assembly positioned along the flow passage and including a diverter surface positioned to divert fluid radially away from the axis. Further, the manifold includes a second flow altering assembly positioned along the flow passage and spaced from the first flow altering assembly. The second flow altering assembly includes an annular flange and a flow altering tube extending axially from the annular flange such that the annular flange and the flow altering tube define an annular cavity that extends radially between the flow altering tube and an inner wall of the flow passage and that extends axially along the flow altering tube to the annular flange.

A flow resistance insert of a flow rate measuring or flow rate control has contiguous discs between which at least one central axial flow duct is formed from which radial flow ducts branch off. The discs include alternating first discs and second discs. While the first discs are circumferentially closed ring discs, the second discs are circumferentially slotted one-piece ring discs.

A fluid regulating device includes a valve having an inlet and an outlet and an actuator coupled to the valve and having a control assembly. The control assembly includes a control element and a diaphragm operably connected to the control element, the control element disposed within the valve and adapted to be displaced relative to a valve seat. A noise attenuation assembly is coupled to the outlet of the valve and includes a cylindrical body and at least one plate disposed in the cylindrical body, the at least one plate having an outer edge. An apparatus for retaining the noise attenuation assembly includes a plurality of rods coupled to the at least one plate. The plurality of rods includes at least one rod having a first end disposed through the outer edge of the at least one plate to support the noise attenuation assembly.

A tube assembly comprising first and second tubes connected by means of fittings welded to ends of the respective tubes. The fittings are placed adjacent to each other and then coupled using a clamp, thereby placing the first and second tubes in fluid communication. At least one of the fittings is an orifice fitting configured to restrict the flow of fluid. Each fitting is configured with at least one projection that assists a clamp to hold the fittings together. Preferably the projections are annular. In some embodiments, the orifice fitting comprises a cylindrical wall and a plate extending radially inward from the cylindrical wall and having a circular orifice. The orifice has a radius less than the inner radius of the tube assembly, so that flow will be restricted by the orifice.