Improvements in and relating to Valve Seats.
Year: 1898

page_text: Improvements in and relating to Valve Seats.
I, WILLIAM MARCHANT, of Earle Street, Ashton-under-Lyne, in the County of
Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in that type of valves for steam, water,
gas and other fluids in which the seating is formed separate from the valve body.
Hitherto such seatings have principally been fastened to the valve body by
being compressed into it, but in practice it is found that through the expansion
of metal and pressure of fluid they very soon become loose.
The object of my invention is to provide means whereby the said defects are
obviated and the valve thus rendered more reliable in action beside easier to
repair.
To this end my invention consists in forming in the bottom half of the valve
body around the projecting part of the valve seating, a groove or channel adapted
to receive a split ring. the ends of which are connected together by a bolt, screw
or other suitable means.
After having placed the said ring into the said groove or channel, it is drawn
tight around the projecting part of the valve seating by the said bolt or the like
and being lodged in the said groove or channel, then effectively prevents the seating
from being forced out of the valve body and greatly facilitates repairs.
1000
F. BOSSHARDT & Co.,
Agents to Applicant.
I. WILLIAM MARCHANT, of 4, Earle Street, Ashton-under-Lyne, in the County of
Lancaster, Engineer, 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:―
My invention relates to improvements in the construction of the various types of
valves used for the purposes of steam, water, gas, or other uses, in which the valve
seating forms a separate part from the valve body. Hitherto such seatings have

page_text: usually been either pressed into a recess provided in the valve body or screwed
into a similar tapped recess in the said body.
In practice such methods have given considerable trouble after a brief period
of work, by reason of the seatings so secured becoming loose and leaky and render-
ing the valve ineffective thereby, in such cases it has proved either impossible to
remove a seating so secured or a task of great difficulty and expenditure of time.
In my invention I provide means to obviate these defects, obtain more reliable
action of the valve, and provide increased facilities for repairs or renewal of the
seatings. To attain these objects, I employ the usual annular seating ring of
either angular, rectangular or other section to suit varying conditions and types
of valves.
In the periphery of this seating ring a tapered groove or channel is formed
around its whole circumference, opposite this a similar but wider groove is cast
in the valve body and next which the seating ring circumference rests, this groove
may be continuous, or intermittent in the shape of cast grooved lugs, as may be
found most suitable to conditions. Placed within the valve body groove is a
circular metal clip ring made in any suitable section or material, and formed in
one piece or any requisite number of segments, provided with necessary bolting
ears or the like, by means of which it is drawn together and secured, in this tightening
operation one side of the ring is drawn in contact with the side of groove cast in
valve body whilst the opposite side of clip ring is pressed against the seating ring
taper groove side next the valve inlet.
The contacts thus made between the clip ring and edges of both grooves extend
practically round the whole outer circumference of seating ring; owing to the
edges of these two grooves overlapping slightly a space is formed which allows
the clip to pass into the seating ring channel in the tightening operation, and in so
doing it forces the seating ring upon its bed.
In conjunction with the accompanying two sheets of drawings I describe in more
particular detail the operation and carrying out of my invention as follows:-On
Sheet 1, Fig. 1 is a sectional elevation of a 8" steam junction valve, and Fig. 2 a
plan in section on line A, B, also a part plan section on line C, D, showing the
interior of clip ring grooves in both valve body and seating ring rim as applied
to this type of valve. E clip ring, I bolting ears to force and hold seating ring H
on its bed or seat, G compression bolt, J seating ring groove, K ring groove in
valve body.
On Sheet 2, Fig. 1 is a longitudinal section of a 8" clearway stop valve and
Fig. 2 an end view in section, the left hand half is a section on line A, B, through
both clip ring grooves, and the right hand half is a section on line (', I), through
the centre of valve body, showing seating ring and also the lip of clip ring groove
--both in elevation, E clip ring, F bolting ears to force and hold seating ring H on
its bed or seat, G com; ression holt, J seating ring groove and lip L, K ring groove
in valve body.
The seating and clip ring herein described are applied to a valve in the following
manner:-
Compress clip ring E until it will pass into the groove K, next insert seating
ring H in position, bolt clip ring E together and tighten seating as required.
To release seating H, and ring E, unbolt clip ring E, wedge open the ears F
sufficiently to allow seating ring H to pass out through the clip ring E, then with-
draw wedge and compress the clip ring E sufficiently to let it pass out of groove
lip L.
In small valves the clip ring E may be applied in the form of a split spring ring
and hold the seating by spring compression instead of by means of a bolt.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is:--
1. The application of a clip ring or rings, spring compressed, bolted, or other-
4
5

page_text: wise, in one or more parts, of suitable shape or section, operating in a continuous
or intermittent groove or grooves in the manner described.
2. The construction, combination and arrangement of the several parts for the
purposes specified herein.
Doted this 17th low of 1000