March 23, 1917.

THE COLLIERY GUARDIAN

573

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PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciality—

COAL SCREENING»CONVEYING

SECTION “OFjjSCREENING PLANT AT^BENTLEY COLLIERY, DONCASTER.

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Simplex Conduits, Limited,

GARRISON LANE, BIRMINGHAM.

113-117, Charing Cross Road, London, W.C.

16, Corporation Street, Manchester.

72a, Waterloo Street, Glasgow.

61-65, High Bridge, Newcastle.

10 & 11, Denmark Street, Bristol.

6, White Horse Street, Leeds
96, Whitechapel, Liverpool.

14, Heathfield Street, Swansea.

4, Westgate Street, Cardiff.

1, Crimon Place, Aberdeen.

WORK IN
BRITAIN
COLONIES.

CONSIDERABLY OVER
100 PLANTS H
Estimates and Designs on application

Agent for South Wales: A. LEIGHTON STEVENS, 15, Fields Road, Newport, Mon.

6% TO 8% SAVING IN FUEL, or 12% TO 15% MORE STEAM

V ; /

H0PKINS0N-FERRANT1

PATENT

STOP VALVE

For Steam and High Pressure Water Service.

The Greatest Advance in Valve Construction of the Times.

SINGLE HOOD

Circulator

39,Victoria Street, London, S. W. 1

MARKS. STAMPS. BRANDING IRONS.

Sets of Peffer & F/gure Punches, Emfossfng Presses.
Press flame Pfefes, Pfescffs, Pfoufflers’Peffers&Ffgares.

pies. E.PRYOR& SON, Seals.

PROTAN

For BOILERS.

BBMBfflW»B®MW®l

A Commercial form of TANNIC ACID

(Containing 48—50 °/o TANNIN).

PRINCIPLE :

Converting the pressure of
the fluid into velocity and re-
converting the velocity into
pressure, thereby passing an
amount of steam equal to full
carrying capacity of pipe.

SELLING POINTS:

Passes same quantity of steam as a full-
bore valve.

Seats half diameter of ordinary sluice
valve, therefore halves possible leakage.

Graded opening—no sudden rush of steam
in opening.

Is not subject to wedging action or
mechanical strain.

When the valve is open the seats are pro-
tected from the flowing fluid by the eyepiece.

Always easy to open and close under
pressure.

Discs and Seats of

HOPKINSON’S

“ PLATNAM ” METAL.

Suitable with Superheated Steam.

BRITISH MANUFACTURE.

In conjunction with Soda Ash

Enables the Boiler User to compound the most efficient

----- SCALE REMOVER ------------

at only a fraction of the cost of Proprietary Compositions.

Composition oan. toe toased on. analysis of water.

Samples and further particulars from

CLEMONS, MARSHALL & CARBERT,

Branch of The Yorkshire Dyeware and Chemical Co. Ltd., Leeds.

Illustrated Specifications and
Catalogue free on application.

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J. HOPKINSON & Co. Ld.,

Makers of Patent Valves and Patent Safety Boiler Mountings,

HUDDERSFIELD.

London, Glasgow, Edinburgh, Cardiff, Oldham, Paris & Petrograd.

No. 374.