US1235541A - Reducing-valve. - Google Patents

Description

E. V. ANDERSON.

REDUCING VALVE.

APPLICATION FILED JUNE 8.1916.

Patented Aug. 7,1917.

/9 INVENTOR EDWARD W. ANDERSON, or MONESSEN,PEENNSYLV1NIA, AssIGNDR er Quartet/E m GHARLES'E. GOLDEN, or CRATTON,GPE'NNSYL3VANIA. v

za mwli et e T0 aZlw/wm it may concern:

' Be it known that 1,,EDXVARD V. Amara soN,-a citizen of the United States, residing at Monessen, in the State of Pennsylvania, have invented certain new and useful !Improvements in' Reducing-Valves, of which ment of the parts more easy, and generally;

to improve the construction and operation of such valves. The invention is illustrated in the accompanying drawing in which Figure 1 is a vertical central section of a double-seated valve according to my inven- 7 tion, and Fig. 2 shows a similar section of a modified form in which the valve operates a little diflerently.

Probably the most satisfactory pressure reducing valve employs a diaphragm under pressure of the line on the outlet side of the main valve, but heretofore such valves have had the danger that in case the diaphragm became perforated in any way the reducing valve would fly open and allow high pressure to enter the low pressure service line. This I avoid by placing the dashpot under the diaphragm, and I incidentally render the valve very sensitive and secure other advantages by such arrangement.

Thus in the drawing, Fig. 1, it will be seen that there is a valve casing 3 provided with a double perforated partition 4 forming valve seats 5 and 6 (of which the latter is preferably smaller in diameter than the former.) On these is seated the double disk valve 7 8, having its upper stem 9 guided in a socket 10 made art of a cap 11 of the main casing 3. The ottom stem is provided .with an extension rod 12 which passes downward through a supplemental casing 13 and through a diaphragm casing 14 containing a-diaphragm 15, and at the bottom is supplied with a packed piston 16 which works within the cylindrical casing extension 17 being secured to the hollow disk 18 screwed on the bottom of the supplemental casing 13. Bearing against the bottom of the rod 7 I ,Specificatipnpf Lettersi l atent.

both opening and closing.

. I Pat ilte lic u 751 115 12 is -agyo' ke 1 9 normally urged .upward'by two rods 20' and 21 inside {the coil springs and 23 adjusted by'means of followers' -and nuts "24, -25, as shownz- *It ;w-i ll7be undersfi Od that --there, is leakage 'jbetween rod 12 and the openings'an the casing and1 3,

so that the fluid from the outlet side of the Obviously if the pressure at (O) falls, -the springs will openthe valve wider, and if it rises the pressure on the diaphragm 15 will partly close the valve against the springs There is thus maintained a very nicely balanced condition and pressure at the outlet side depending entirely upon the tension of V springs 22 and 23.-

The bottom dashpot piston 16 is packed in the cylinder 17, and of course will retard and regulate the movements of the valve in case the diaphragm 15 should become broken or perforated, this will not result, as has heretofore been the result, in relieving the effect of the low pressure in maintaining the valve in a balanced condition,'but said pressure will simply take effect on the disk 16, which is of the same diameter as-the diaphragm l5,'and while there will be a slight leakage the valve will continue to operate as before until'repairs are made.

In Fig. 2, the arrangement is as before described except that the casing 3* has a single perforated partition 4 and a single valve seat 25 accommodating a single valve 26 which is provided with a more refined form rrED STATES PATENT OFEIQE Moreover, in a interior of cylinder 80. This cylinder carries integral with it a small puppet valve 32 held down upon the seat 33 by a coil spring 34; maintained in a perforated cap 35. By this means the pressure from the outlet side is permitted to enter the space marked (A) but not to escape therefrom, with the result that the pressure in the chamber (A) is never less than the pressure at the outlet side marked (0) and the valve in opening always operates, against the pressure actually existing on the outlet side of the main valve. This, it will be seen, is the sameas the pressure on the diaphragm 15 and assists in the nicety of the balance attained by adjusting the nuts 24, 25 on the coil springs.

Having thus described my invention and illustrated its use, what I claim is the following:

1. A pressure reducing valve comprising the combination with a main valve casing and valve therein, of two supplemental pressure chambers and pistons therein subject ed to the pressure on the outlet side of the balance the fluid pressure in said supplemen- &

tal chambers.

2. A pressure reducing valve comprising a main valve casing having a perforated partition, a valve seated therein, a piston attached to the stem of the valve and forming in conjunction with the casing, a dashpot, ports and a supplemental valve adapted to maintain "in said dashpot always the pressure on the outlet side of the main valve, a supplemental stem to the main valve carrying another piston and a flexible diaphragm inside the same, a supplemental casing con taining a space limited by said diaphragm, and adjustable springs adapted to exert pressure on the supplemental valve stem in opposition to the outlet pressure on said diaphragm.

In testimony whereof I have hereunder signedmy name.

EDWARD 7V. ANDERSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

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