March 17, 1916.

THE COLLIERY GUARDIAN.

503

THERE IS A

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

CENTRIFUGAL FAN
for every purpose for which a
:	: Fan can be used. :	:

Speciality—

COAL SCREENING & CONVEYING

CUPOLA FANS.

Built in 8 standard sizes and
designed for melting half a ton
to twenty tons of metal per
hour with pressures from 12
to 30 in. w.g.

------See Bulletin No. 2028. ----------

SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER

Davidson & Co. Ltd.,

Sirocco Engineering Works,

BELFAST.

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.

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HOWARD STREET

H0PK1NS0N-FERRANTI
PATENT
STOP VALVE

For Steam and High Pressure Water Service.

The Greatest Advance in Valve Construction of the Times.

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.

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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. 342.