According to certain embodiments, an adapter assembly for a bottom outlet valve comprises an apparatus configured to be coupled to a stem of the bottom outlet valve of the railroad car. The stem of the bottom outlet valve is aligned generally with a longitudinal axis of the railroad car. The apparatus comprises a coupler configured to be coupled to the stem of the bottom outlet valve and a primary gear coupled to the coupler. The primary gear is configured to be coupled to a handle assembly extending from either side of the railroad car. The handle assembly is configured to operate the bottom outlet valve.

The invention relates to shut-off valve for controlling flow of a pressurised gas. The shut-off valve comprising a body defining a passage extending between a gas inlet channel and a gas outlet channel, and a sealing element, and an emergency stop mechanism. The sealing element arranged to, in a first position, close the passage, and in a second position, open the passage to allow gas to flow between the gas inlet channel and the gas outlet channel through the passage. The invention also relates to a method for controlling flow of a pressurised gas with a shut-off valve and a method for activating an emergency stop of a shut-off valve.

The invention relates to a valve, in particular to a valve with self-locking function which comprises a valve body, a valve element, a valve control assembly, an upper locking assembly and a lower locking assembly; the valve body comprises an upper box body, a lower box body, a water inlet pipe and a water outlet pipe; the lower end of the upper box body is fixedly connected and communicated with the lower box body, the left end of the lower box body is fixedly connected with the water inlet pipe, and the right end of the lower box body is fixedly connected with the water outlet pipe.

A flow control valve adjusts an opening degree of a second channel by moving a needle valve in a first axis direction in accordance with a rotating operation amount of a knob provided at the first body, and includes a scale body, and a scale reading part that indicates the scale mark corresponding to the rotating operation amount of the knob, and a clutch mechanism that changes the scale mark of the scale body when the knob is rotated. The clutch mechanism includes an engaging portion, an engaged portion, and a clutch drive mechanism, and the scale reading part and the scale body rotate integrally when the engaging portion and the engaged portion are engaged. The clutch drive mechanism releases engagement between the engaging portion and the engaged portion when the knob is rotated and, after the scale mark is changed, re-engages the engaging portion with the engaged portion.

A two-way or four-way water faucet dispenses near-boiling water on demand but has a safety interlock. A control valve assembly is attached to the faucet. The interlock uses two disks pressed into contact, each having a single projecting sector. One disk is fixed to the valve body. The other disk, fixed to the handle, slides against the first. The disks must be pulled apart by sliding the handle while it is being turned to superimpose the sectors and turn the control valve, connecting the faucet to the vented near-boiling water supply. A reed switch inside the fixed sector is activated by a magnet inside the rotatable sector and activates a near-boiling water pump.

A safety system for a gas cylinder valve stem includes a coupler and a handwheel. The coupler includes a first engagement mechanism (EM). The coupler is configured to: mount onto the stem's base; and rotate the stem in unison with rotation of the coupler or remain stationary in unison with the stem. The handwheel includes a second EM configured to engage in surface-to-surface contact with the first EM. A locking mechanism is defined by the first and second EMs. The handwheel is configured to mount onto the stem's intermediate portion between the stem's tip and the coupler's proximal top surface. The handwheel is configured to rotate about the stem's longitudinal axis, in response to receiving an angular force of rotation in a lateral plane. The handwheel rotates in unison with the coupler when the locking mechanism is engaged, yet rotates independent from the coupler when the locking mechanism is disengaged.

The invention is directed to a device (2) for regulating the pressure and/or flow of pressurized gas, comprising a body (4) with a gas inlet (6), a gas outlet (8) and a gas passage (10, 26) connecting the outlet (8) with the inlet (6), a gas shut-off device comprising a seat (22) in the passage (10) and a movable closure element (24) cooperating with said seat (22) and a piston (12) carrying the closure element (24) and delimiting with the body (4) a low pressure chamber (28) downstream of the shut-off device (22, 24). The body (4) comprises a first portion (4.sup.1) with the seat (22) and the inlet (6) and a second portion (4.sup.2) housing the piston (12) and delimiting the low pressure chamber (28). The second portion (4.sup.2) is movable relative to the first portion (41) between a closed position, and an open position.

An example manual actuation mechanism includes (i) a piston having: (a) a first flanged portion with a first annular surface area, (b) a second flanged portion with a second annular surface area, (c) a longitudinal cavity bounded by an interior peripheral surface of the piston, and (d) a shoulder on the interior peripheral surface of the piston; and (ii) a pin disposed in the longitudinal cavity of the piston, where the pin has an area with an enlarged diameter configured to interface with and rest against the shoulder of the piston, such that a force applied on the pin in a given axial direction is transferred to the piston, and where a difference between the second annular surface area of the second flanged portion and the first annular surface of the first flanged portion is substantially equal to a cross-sectional area of the pin.

A construction unit (1, 2) forms part of a gas heater and includes a valve (9) which is actuatable by way of a stem (10). The stem (10) includes positive-fit device. The stem (10) is controllable from the outside via a tool which can be brought into engagement with the positive fit device. A detent engagement device (18, 27) holds the tool (21) in engagement with the stem (10), so that the valve is controllable without the aid of outside tools.

An example manual actuation mechanism includes (i) a piston having: (a) a first flanged portion with a first annular surface area, (b) a second flanged portion with a second annular surface area, (c) a longitudinal cavity bounded by an interior peripheral surface of the piston, and (d) a shoulder on the interior peripheral surface of the piston; and (ii) a pin disposed in the longitudinal cavity of the piston, where the pin has an area with an enlarged diameter configured to interface with and rest against the shoulder of the piston, such that a force applied on the pin in a given axial direction is transferred to the piston, and where a difference between the second annular surface area of the second flanged portion and the first annular surface of the first flanged portion is substantially equal to a cross-sectional area of the pin.