May 4, 1917.

THE COLLIERY GUARDIAN.

847

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PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciality—

COAL SCREENING s CONVEYING

SECTION OF SCREENING '[PLANT,{AT BENTLEY COLLIERY, DONCASTER.

Simplex Conduits, Limited,

GARRISON LANE, BIRMINGHAM.

113-117, Charing Cross Road, London, W.C; 2.	6, White Horse Street, Leeds

16, Corporation Street, Manchester.	96, Whitechapel, Liverpool. i

72a, Waterloo Street, Glasgow.	14, Heathfield Street, Swansea?

61-65, High Bridge, Newcastle.	4, Westgate Street, Cardiff. i

10 & 11, Denmark Street, Bristol.	1, Crimon Place, Aberdeen. |

CONSIDERABLY OVER

inn pi amt? ==-

IUU I LHIw I u and the colonies-

Estimates and Designs on application

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

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

HOPKINSON-FERRANTI

PATENT

STOP VALVE

For Steam and High Pressure Water Service.

The Greatest Advance in Valve Construction of the Tinies.

SINGLE HOOD

Circulator

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

Tt .................. ,w.... g*

MARKS. STAMPS. BRANDING IRONS.

]^^^J3rass Labe/s & l/'me

Sefs of Letter & figure Punches, firn bossing Presses,
grass flame P/ates, flfena/s, Pfou/flers’Lettersi figures.

pies. E.PRYOR&SOH, Seals. *

II2-IIB ROCKINCHAM 51 SHEFFIELD. _-^B

A Commercial form of TANNIC ACID

(Containing 48—50 °\a 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.

PROTAN

For BOILERS.

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.

Com position oa.n toe based 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.

...L..

job - .J3HL '

II

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n



J. HOPKINSON & Co. Ld.,

Makers of Patent Valves and Patent Safety Boiler Mountings,

HUDDERSFIELD.

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

No. 374.