Improvements in Reducing or Pressure Regulating Valves for Fluids.
Year: 1894

page_text: Date of Application, 14th Aug., 1894
Complete Specification Left, 21st Mar., 1895-Accepted, 13th July, 1895
PROVISIONAL SPECIFICATION.
Improvements in Reducing or Pressure Regulating Valves for
Fluids.
I FERDINAND MARIE SANDILLON, Chief Engineer at the Refinery at La
Biette, Aisne, in the Republic of France, do hereby declare the nature of this
invention to be as follows:-
This invention for improvements in reducing or pressure regulating valves for
fluids consists in a lift valve situated in a passage connecting the high and low
pressure reservoirs and fixed to the rod of a piston perforated with a small bole
and working in a cylinder having its outer end connected by a pipe and automatic
valve to the low pressure reservoir. When the automatic valve opens com-
munication between the outer end of the cylinder and the low pressure reservoir
the pressure on the outer side of the piston is relieved and the valve is opened
thus admitting more fluid from the high pressure reservoir to the low pressure
reservoir; and when the automatic valve closes the communication the fluid passing
through the small hole in the piston equalises the pressure on the two sides of the
piston and the pressure on the valve then closes it. The automatic valve is a
plunger valve acted on by an adjustable spring and by the pressure from the low
pressure reservoir, the valve opening the communication as the pressure decreases
and closing it as the pressure again increases.
Dated this 14th day of August 1894.
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Reducing or Pressure Regulating Valves for
Fluids.
I FERDINAND MARIE SANDILLON, Chief Engineer at the Refinery at La
Biette, Aisne, in the Republic of France, do hereby declare the nature of this
invention and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement :-
This invention for improvements in reducing or pressure regulating valves for
fluids consists in a lift valve situated in a passage connecting the high and low
pressure reservoirs and fixed to the rod of a piston perforated with a small hole and
working in a cylinder having its outer end connected by a pipe and automatic
valve to the low pressure reservoir. When the automatic valve opens communi-
cation between the outer end of the cylinder and the low pressure reservoir the
pressure on the outer side of the piston is relieved and the valve is opened thus
admitting more fluid from the high pressure reservoir to the low pressure reservoir,
and when the automatic valve closes the communication the fluid passing through
the small hole in the piston equalises the pressure on the two sides of the piston
and the pressure on the valve then closes it. The automatic valve is a plunger
valve acted on by an adjustable spring and by the pressure from the low pressure

page_text: reservoir, the valve opening the communication as the pressure decreases and
closing it as the pressure again increases.
In the accompanying sheet of illustrative drawings: Fig. 1 is a longitudinal
vertical section of a type of reducing valve in which the valve box and the
regulating piston of the reducer are united into one single apparatus constructed
according to this invention, and Fig. 2 is a similar view of another type of the
same system of valve in which the valve box and the regulating piston of the
reducer are separated from each other and connected by a tube.
The valve box c is provided with a tubular space a communicating with the
reservoir containing the fluid under pressure, and with a tubular space b com-
municating with the reservoir for the low pressure fluid. The valve c opens or
closes the communication between the two tubular spaces a and b. This valve c is
guided by a cylindrical part c¹ and by wings c²; it is provided at its upper part
with a rodd attached by a screwed bolt and a nut e to a piston f sliding in a
cylindrical chamber situated above the valve c. This piston is constructed of
two superposed parts connected by the bolt e, between these two parts is formed
an annular chamber g2 which communicates on the one side with the tubular
space a by several small holes g' and on the other side with the chamber situated
above the piston ƒ by a single orifice g larger than the orifices g'. The chamber h
closed by a cap i, communicates by a passage k (Fig. 2) with a cylinder 7 in which
slides easily a small hollow regulating plunger m bored with orifices o coming
opposite corresponding orifices p bored in the cylinder when the plunger m is at
the bottom of its travel. On the head of this plunger m is attached by a bolt m²,
a cap m¹ which rests on the upper edges of the cylinder and which serves to limit
the travel of the plunger downwards.
To regulate the pressure exerted on the plunger m a spiral spring acts on the
cap m² and is regulated by means of a screw s turning in a nutt tapped in the top
of a bracket u connected to the cover i of the chamber h. The point of the screw's
presses on a plate against which rests the upper spiral of the spring r.
In the arrangement shown by Fig. 2 the cylinder in which the regulating
plunger m of the release moves, is placed on the receptacle A containing the low
pressure fluid. The annular channel p² into which the orifices p open is connected
to the cover of the chamber containing the valve e by a tube k of greater or less
length on which is arranged a one or two way stop cock j. The cover i supports
an arch arm i¹ in which is mounted a nut working on the screwed rod v and ou
which is keyed the wheel w. When it is desired to fasten down the valve c on its
seat a the wheel w is operated and the rod v is lowered so that the centre v' fits on
the point el made at the top of the bolt rod e, the valve c can then act as a stop valve.
During the normal action of the valve c the screwed rod v is raised up to the level
of the cover i as shown. A spiral spring f2 presses on the piston to insure the
valve c being tight.
The apparatuses operate in the following manner:
The fluid under pressure flowing in through the tube a presses on the underneath
of the valve c and on the underneath of the piston f, it passes through the holes g¹
and
to the upper part of the piston f and flows through the channel k (Fig. 1) or
through the tube k (Fig. 2) (the cock j being open) into the annular channel pl
and enters through the orifices p and o into the hollow piston m and thence into the
tubular space or directly into the receptacle A which contains the low pressure
vapour. As the section of the orifices p and o. is larger than that of the hole g, the
vapour which enters through g flows through o and the pressure in the, chamber h
is reduced. As the surface of the piston is larger than that of the value c the
fluid under pressure acts with greater force on. the piston than on the valve and
drives it upwards, by reason of the reduced pressure existing in the chamber h, no
that the valve c is raised above its seat a and its cylindrical part d' releases the
opening of the tubular space b leading to the receptacle A. The fluid; under
pressure then passes from the tubular space a into the tubular space.b and thence
into the receptacle A; proportionately as the pressure rises in the receptacle A

page_text: (Fig. 2) or in the tube b (Fig. 1) the plunger m rises compressing the spring and
the openings o are no longer opposite the openings p so that the fluid under
pressure which passes through the hole g of the piston f accumulates in the
chamber h and reacts on the piston which receives at this moment an equal
pressure on its two opposite faces and sets the valve c back on its seat a'.
As soon
as the cylindrical part e¹ enters the tubular space the fluid under pressure ceases
to flow from the tube a to the tube b.
When the normal pressure of the low pressure fluid falls the small plunger m
falls again and its orifices open to a larger or smaller extent the orifices p
creating once more a passage for the fluid under pressure enclosed in the
chamber and effecting the automatic opening of the valve c as above described.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is :-
:-
1. A system of reducer for fluids under pressure, characterised by the com-
bination of a release valve interposed between the conductor leading from the
high pressure container and the tube leading to the low pressure container,
connected to a pressure receiver: of a pressure receiver consisting of a piston
or movable diaphragm the surface of which is larger than that of the release
valve; the said receiver being bored with a small hole making communication
between the high pressure conductor and a tube leading to a cylinder, in which
slides a plunger regulating the release: with a movable plunger regulating the
release submitted directly on one side to the pressure of an outside load
(spring or weight) and on the other side to the pressure of the low pressure
fluid; the movements of this plunger having as their object to open or close
automatically the communication between the high and low pressure pipes by
reason of the reduction of pressure which is produced above the pressure receiver
and to thus effect automatically the opening and closing of the release valve of the
high pressure fluid, substantially as described.
2. A system of reducer for fluids under pressure in which a release valve c is
connected to a pressure receiver f (piston or diaphragm) bored with a small
hole making a passage between the conductor a of the high pressure fluid and
the top of the receiver f; the said receiver being in communication with a
cylinder in which slides a small plunger m; the automatic movements of this
plunger m, pressed by a spring r or loaded with a weight effecting a reduction of
pressure above the receiverf and operating the opening of the release valve cas
described and shown.
3. The improvements in reducing or pressure regulatimg valves for fluids
substantially as described with reference to the drawings.
Dated this 20th day of March 1895.
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, W.C., Agents.