A control cylinder for a control valve, the control cylinder including a main body having through-openings. To optimize the flow and to reduce cavitation, the through-openings have an inside wall with a curved, oblique or conical profile and/or with edges and/or undercuts.

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.

A valve for a well system including a valve housing including a first housing port, a second housing port, and a bore, a piston received in the bore and including a first end, a second end, and an annular flange including a first annular surface and a second annular surface both of which are in fluid communication with the second housing port, a piston seal disposed in the outer surface of the piston and in sealing engagement with an inner surface of the bore, and a cage assembly that includes a cage including a bore, a first cage port, a second cage port, and a third cage port, and a spool disposed in the cage and coupled to the piston, the spool including a throughbore.

A pressure-reducing valve 1 includes a tubular valve body 3 movably accommodated in a housing 2, a valve seat 4 fixed inside the housing 2, and an urging member 5 that urges the valve body 3 in a direction separating from the valve seat 4. The valve seat 4 includes an annular elastic member (O-ring 42) capable of abutting against the valve body 3, an annular portion (inner ring portion 41b) that covers an outer periphery of the elastic member, an inner peripheral portion 43b disposed on an inner periphery of the elastic member, a connecting portion (closing plate portion 43a) that connects the annular portion and the inner peripheral portion 43b, and a detachment prevention portion provided in at least one of the inner peripheral portion 43b and the annular portion on a valve body side to prevent the elastic member from detaching from the annular portion.

A valve device (1) controls media flows of any type by a valve control piston (33) guided in a longitudinally movable manner in a valve housing (3) and controlling a media connection between media connection points (9, 11) in the valve housing (3). One media connection point is a pressure supply inlet (P). Another media connection point is a load outlet (A). The valve control piston (33) is guided in the valve housing (3) with pressure equalization by an equalizing apparatus (35) with respect to the media pressure at the pressure supply inlet (P).

A fluid valve includes a valve body having a fluid inlet and a fluid outlet. A fluid passageway connects the fluid inlet and the fluid outlet. A trim assembly is located within the fluid passageway, the trim assembly controlling fluid flow through the fluid passageway. The trim assembly includes valve plug having an integrated staged pressure recovery.

A fluid valve includes a valve body having a fluid inlet and a fluid outlet. A fluid passageway connects the fluid inlet and the fluid outlet. A trim assembly is located within the fluid passageway, the trim assembly controlling fluid flow through the fluid passageway. The trim assembly includes valve plug having an integrated staged pressure recovery.

An in-line valve assembly for a tubular drag conveyer system includes a first tube segment having a first end and defining a first passageway, a second tube segment having a second end and defining a second passageway, and a tubular valve body translatably disposed relative to the second tube segment and defining a valve passageway. The first end of the first tube segment is spaced apart from the second end of the second tube segment by a gap. The valve body is selectively adjustable between a closed position wherein the valve passageway spans the gap and connects the first passageway to the second passageway and an open position wherein the valve passageway is spaced apart from the first passageway by at least a portion of the gap.

A normally closed subplate mounted valve has a lower valve seat defining a function port, an upper seat, and a sleeve between the upper seat and the lower seat. The sleeve defines a first port. The poppet is movable within the sleeve to selectively seal against the lower seat in a piloted position or to seal against the upper seat in an offset position. The poppet blocks the first port when the poppet is positioned in an offset position. A piston shaft is affixed to the poppet for moving the poppet into the piloted or offset position. A spring biases the poppet in the offset position for preventing fluid flow into the first port. A pilot port supplies pressure for sliding the piston to compress the spring and to move the poppet away from the offset position to the piloted position so that fluid may flow into a supply port and out of the function port. A second port may be provided in the sleeve. The ports may be selectively configured for supply or vent. Components may be joined with retainer springs. The piston shaft and poppet connector may be a key and key slot engagement. The ports may be shaped for progressive exposure by movement of the poppet. The poppet may be designed to enable pressure assist through the first port when moving the poppet to the piloted position. The valve seats may be provided with angled sealing surfaces that are angularly offset from their mating counterparts.

A valve for a well system including a valve housing including a first housing port, a second housing port, and a bore, a piston received in the bore and including a first end, a second end, and an annular flange including a first annular surface and a second annular surface both of which are in fluid communication with the second housing port, a piston seal disposed in the outer surface of the piston and in sealing engagement with an inner surface of the bore, and a cage assembly that includes a cage including a bore, a first cage port, a second cage port, and a third cage port, and a spool disposed in the cage and coupled to the piston, the spool including a throughbore.