A balance or flow limiting valve features a valve body/member having a flow rate indicator/scale containing setting having printed flow rates calibrated in units of measure in volume per time increment between a minimum flow rate position (MIN) and a maximum flow rate position (MAX); and a knob/handle having a position indicator and being moveable to any continuous position on the flow rate indicator/scale between MIN and MAX in response to a user applied force, where the relationship between the flow rate indicator/scale and the position indicator is based on calibrated flow characteristics of the balance or flow limiting valve. The user can set an exact desired flow rate in one operation by moving the knob/handle to a desired position between MIN and MAX without consulting a printed flow curve or balance calculator to determine the desired exact flow rate.

A gas pressure regulator comprises a high pressure inlet and a regulator mechanism which is arranged to receive high pressure gas via the high pressure inlet, and deliver gas at a regulated pressure to a regulated pressure outlet. The regulator comprises a regulator element and a rotatable member that rotates to move the regulator element, thereby adjusting the regulated pressure. A gauge arranged to receive high pressure gas and display a measured reading of the pressure of the high pressure gas is also provided along with a regulated pressure indicator which is arranged to display a regulated pressure value related to the degree of rotation of the rotary mechanism. The regulator mechanism has a gear chain between the rotatable member and the indicator so that it requires multiple rotations of the rotatable member to move the regulator element through its full range of movement.

The present invention discloses an executive system for driving a valve to open and close, comprising a first housing, a linkage block, a first drive rod and a drive mechanism. Wherein, the first housing has a first inner cavity; a medium channel is provided in a side wall of the first housing; an outer peripheral wall of the linkage block is arranged on a wall of the first inner cavity in a slidable and sealed manner, and the linkage block partitions the first inner cavity into an upper cavity and a lower cavity; the medium channel is communicated with the upper cavity; a bottom part of the first drive rod sequentially passes through a top part of the first housing and the linkage block and extends into the lower cavity; a position-limiting part on the bottom part of the first drive rod blocks the linkage block within a region between the position-limiting part and the top part of the first housing; the drive mechanism is provided on top of the first drive rod. The degree of friction between an outer peripheral wall of the linkage block and an inner surface of the first housing is reduced, and the probability of a gap being produced between the peripheral wall of the linkage block and the inner wall of the first housing is reduced, so that the first drive rod can drive the valve stem to move into position, thereby increasing the reliability of the executive system controlling the valve to open and close.

An adjustable flow valve, comprising: a body; an upstream port; a downstream port; a body; a side plate; a restricting paddle within the body that pivots into a flow path from the upstream port to the downstream port; a screw coupled with the restricting paddle and configured to swing the restricting paddle from a hinged point across the flow path; and wherein the side plate has an opening that exposes an edge of the restricting paddle and graduations that illustrate a plurality of flow percentage.

A fluororesin diaphragm valve includes a valve portion, a sealing mechanism and an adjusting mechanism for the opening degree of the valve. The valve portion includes a valve body, a valve shaft, and a valve upper cover. The valve body includes a square portion, an annular portion, and a valve chamber. The sealing mechanism includes a diaphragm, an upper valve body, a tightening ring and an annular portion of the valve body. The adjusting mechanism is installed on the top of the valve upper cover. The sealing mechanism is installed in the annular portion and at the minimum diameter area of the annular portion, having annular lattice-shaped ribbed plates with horizontal openings to increase the structural strength of the diaphragm seal and improve the heat dissipation effect.

A balance or flow limiting valve features a valve body/member having a flow rate indicator/scale containing setting having printed flow rates calibrated in units of measure in volume per time increment between a minimum flow rate position (MIN) and a maximum flow rate position (MAX); and a knob/handle having a position indicator and being moveable to any continuous position on the flow rate indicator/scale between MIN and MAX in response to a user applied force, where the relationship between the flow rate indicator/scale and the position indicator is based on calibrated flow characteristics of the balance or flow limiting valve. The user can set an exact desired flow rate in one operation by moving the knob/handle to a desired position between MIN and MAX without consulting a printed flow curve or balance calculator to determine the desired exact flow rate.

A valve position indicator for a valve includes a spline barrel, indicator flag, and follower. The spline barrel may be generally tubular and may be positionable about a tail stem protector of the valve. The spline barrel may have a helical slot formed therein. The spline barrel may be rotatably coupled to the tail stem protector of a valve. The indicator flag may be coupled to the spline barrel and may extend radially therefrom. The follower may be coupleable to a tail stem of the valve. The follower may extend in a direction perpendicular to the extent of the tail stem. The follower may extend through a slot in the tail stem protector and the helical slot of the spline barrel when the spline barrel is positioned about the tail stem protector.

A fluid regulator includes an actuator assembly disposed in a valve body. A sleeve includes a cylindrical wall, a first plate, and a second plate. Each of the first plate and the second plate is disposed in a cavity of the sleeve. A stem extends through the sleeve and is axially aligned with a longitudinal axis of the body, and includes a passage extending partially through the stem. The actuator assembly includes first and second pistons. First, second, third, and fourth chambers are separately disposed between the sleeve, the first or second plate, or the first or second piston. The first and third chambers are in fluid communication, and the second and fourth chambers are in fluid communication via the passage of the stem. The actuator assembly actuates a control element in response to a fluid pressure receivable in the first, second, third, and/or fourth chambers.

Exemplary embodiments are directed to butterfly valves, generally including a body assembly and handle assembly. The body assembly generally includes a body, a disc rotationally disposed inside an opening of the body, a cog, and a stem passing through the disc and the body. The handle assembly generally includes a handle body and a force ring. The stem can be rotationally interlocked relative to the disc and the handle assembly. The cog and the force ring can engage to rotationally secure the disc relative to the body. The handle assembly can include a lever and a grip, the force ring, the lever and the grip being pivotally secured relative to each other. The body can include a male radial protrusion and the body assembly can include a liner with a female radial groove. Methods of assembling and positioning a butterfly valve are also provided.

An actuator for use in a control valve assembly that has a structure amenable to manufacture. The actuator may comprise a housing comprising a plurality of walls secured to one another with fasteners to form an interior cavity, a torque hub disposed in the interior cavity, the torque hub comprising a torque body and a torque arm that are releasably engaged with one another via fasteners, each of the torque body and the torque arm having interfacing geometry that defines surfaces that engage with opposing surfaces on the other; and a load generator coupled with the torque hub.