Abstract:
Example pressure regulators with filter condition detectors are described herein. In one example described here, a regulator includes a body having an inlet and an outlet and a flow control member interposed between the inlet and the outlet to regulate a fluid pressure at the outlet. The example regulator also includes a filter disposed between the inlet and the flow control member and a detector having a first measurement point upstream from the filter and a second measurement point downstream from the filter and upstream from the flow control member.
Abstract:
A control assembly for converting a “fail-close” regulator to a “fail-open” regulator, or vice versa, without having to modify or reconfigure a casing of the regulator includes a control member, a central rod, and a spring disposed between first and second spring seats. A regulator including the control assembly includes a valve body and an actuator casing, the valve body defining a fluid flow-path. The control member is slidably disposed within the actuator casing and adapted for displacement relative to the valve body for controlling the flow of fluid through the flow-path. The spring and spring seats are disposed about the central rod, such that the spring biases the control member into a predetermined position relative to the regulator casing.
Abstract:
The present invention includes a sensing device, a bonnet located below the sensing device, a piston with a through hole, and a valve stem connected with the sensing device, and a penetrating part through the through hole wherein the sensing device drives the valve stem to drive the piston; an auxiliary spring is arranged between the bonnet and the piston; the penetrating part is longer than the depth of the through hole; and the valve stem is slidably coupled in piston. The disclosed valve can prevent the valve stem from transferring the force of the main spring to the piston, so as to avoid damaging the valve port, the valve stem and the piston due to a reason that the force of the main spring is too large.
Abstract:
An emergency shut-off valve includes a valve body defining an inlet, an outlet, a valve port between the inlet and the outlet, and an aperture. A valve assembly is positioned partially within the valve body and extends through the aperture. An actuator assembly is operatively coupled to the valve assembly to move the valve assembly between an open position and a closed position and includes a poppet and a rotatable shaft. The poppet is disposed within the valve body and is moveable between an open position that allows the flow of fluid through the valve body and a closed position that prevents the flow of fluid through the valve body. The shaft is coupled to the poppet and has a retaining member positioned within a slot in an arm of the poppet to prevent the poppet from being removed from the shaft.
Abstract:
A sealing disk mounting assembly for a regulator includes a mounting member adapted to be operatively attached to a tubular member of a control member assembly of a regulator, a disk holder operatively attached to the mounting member, and an annular sealing disk disposed in an annular channel that is formed between the mounting member and the disk holder. The annular sealing disk is mechanically retained between the mounting member and the disk holder by compressive forces.
Abstract:
A pressure relief assembly may include an actuator stem having a plurality of retaining grooves. A relief plate may be operatively connected to the actuator stem and a diaphragm plate may be operatively connected to the actuator stem. A diaphragm may be least partially disposed between the relief plate and the diaphragm plate. A relief spring seat may be releasably attached to the actuator stem at one of the plurality of retaining grooves. The relief spring may be adjusted by moving the attachment point from one retaining groove to another retaining groove.
Abstract:
A cage for a control valve trim assembly includes a cage body having an opening at one end and a wall extending from the opening, a plurality of cage openings disposed in the wall, and a pressure relief mechanism disposed in the cage wall.
Abstract:
A balanced pressure regulator includes a valve body having a fluid inlet and a fluid outlet connected by a fluid passageway. A valve seat is disposed within the fluid passageway. A self-aligning valve plug is at least partially disposed within the fluid passageway, the self-aligning valve plug interacting with the valve seat to selectively open or close the fluid passageway. A retainer is partially disposed within a bore of the self-aligning valve plug and operatively connects the self-aligning valve plug to a valve stem having a ball portion. More specifically, the retainer includes a recess adapted to receive the ball portion of the valve stem, such that the self-aligning valve plug automatically rotates around the ball portion of the valve stem to achieve alignment and sealing engagement between a valve disc of the self-aligning valve plug and the valve seat.
Abstract:
An actuator for a fluid regulator includes two or more control springs operatively connected to a diaphragm such that at least two of the control springs bias the diaphragm independently in parallel and have different natural frequencies. A method for retrofitting a prior art actuator to include a second control spring is also disclosed.
Abstract:
A slam-shut safety device includes a valve body and defining a flow path, a valve disc mounted on a valve disc support is movable between an open first position spaced away from the valve seat and a closed second position seated against the valve seat. A reset pin is operatively coupled to the valve disc support and is shiftable between an untripped position placing the valve disc in the open position and a tripped position placing the valve disc in the closed position. An anti-rotation assembly is carried by cooperating portions of the valve disc and the valve disc support, with the anti-rotation assembly comprising at least one protrusion and at least one receiving area sized to receive the protrusion, the anti-rotation assembly arranged to stop rotation of the valve disc relative to the valve disc support.