February 16, 1917.

THE COLLIERY GUARDIAN.

327

MARK

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

AIR WASHER

’ - .r* -

** ** V

r • -■■■ * ■*

fe ' *>. • ' ’

v’X* *♦ *♦

For Cooling Turbo-Generators and
supplying clean air to Compressors.

Thorough Washing.

The air current is brought into intimate contact with
a very fine mist, and all particles of foreign matter
are removed either in the spray chamber or by means
of the scrubber plates.

Elimination of Free Moisture.

A series of carefully - designed eliminator plates
removes all free moisture from the air current, which
passes out of the Washer in a cool and pure state.

Economy in Water.

The water is recirculated, passing on its way to the
spray nozzles through two sets of Filters.

Write for Publication No. 1013 C.

DAVIDSON & Co. Ltd., Sirocco Works, BELFAST.

Speciality—

COAL SCREENING t CONVEYING

IW

■ -

^SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.

CONSIDERABLY OVER

100 PLANTS

NOW AT WORK IN

GREAT BRITAIN
AND THE COLONIES.

Estimates and Designs on application.

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

6/0 TO B% SAVING IN FUEL, or 12% TO 15% MORE STEAM

SINGLE HOOD
Circulator

39,Victoria Street, London, S. W.

ANNALS OF COALMINING & THE COAL TRADE.

By Post, 25s. 9d.	BY ROBERT L. CALLOWAY.	Price aSs. net.

The Colliery Guardian Co. Ltd., 30 & 31, Furnival Street, Holbom, London, E.C

SPECIAL Self-contained MACHINE for CORRECT GRINDING of

STONE-DUST

For FIERY WORKINGS.

BRICKMAKING
MACHINERY

Suitable for COLLIERY SHALES.

Richard Scholefield, Leeds.

■Phone 1513.	ENQUIRIES SOLICITED. Wire “Brick, Leeds.”

H0PKINS0N-FERRANTI
PATENT
STOP VALVE
For Steam and High Pressure Water Service.

The Greatest Advance in Valve Construction of the Tinies.



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.

Illustrated Specifications and
Catalogue free on application.

CD
tn

o
o
o

o
CM

0
CO

3

O
o
CD
o'
CM

J. HOPKINSON & Co. Ld.,

Makers of Patent Valves and Patent Safety Boiler Mountings,

HUDDERSFIELD.

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

No. 374.