March 16, 1917.

THE COLLIERY GUARDIAN.

525

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

AIR WASHER

V.

Elfe

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.

6/ TO 3% SAVING IN FUEL, on 1 2% TO 1 5% MORE STEAM

.i'T5,

l ■

SINGLE HOOD

Circulator

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

ANNALS OF COALMINING & THE COAL TRADE.

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

The Colliery Guardian Co. Ltd., 30 & 31, Furnival Street, Holborn, London, E.C 4

FUEL OIL

for industrial furnaces, Diesel engines & merchant ships.

We supply a clean,
high-grade fuel oil.

Brotherton & Co. Ltd

WORKS—

Birmingham

Glasgow

Leeds

Liverpool

City Chambers,

Leeds

WORKS-

Middlesborough
Sunderland
Wakefield
Workington

Speciality

COAL SCREENING«CONVEYING

<	. . A

-L;
'

SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.







CONSIDERABLY OVER
100 PLANTS H
Estimates and Designs on application.

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

WORK IN
BRITAIN
COLONIES.

NT

VALVE.

Suitable for the

“MAC”

Figure 82OO-Inside Screw

Figure 8205—Outside Scx?ew

Highest Steam Pressures.

Fitted with

flopkinson’s Platnam ”
Metal Renewable Valve
and Seat.

All parts interchangeable.

All joints made by metallic
contact, thereby obviating the
necessity of using jointing
material.

By removing the cover the seat
and valve are withdrawn,
enabling new parts to be in-
serted in about a minute’s
time, and without the neces-
sity—as with ordinary valves
—of removing the valve body
from its fixed position.

The Renewable Valve and Seat is made of

Hopkinson’s “ Platnam ” Metal

which is suitable for superheated steam and bad waters.

There are many valves with renewable valve and. seat upon the market, but under modern
conditions and high pressures do not last any length of time owing to the deterioration which
takes place on the valve and seat, and consequently the renewing of the parts is a frequent
occurrence. We have tried our “Platnam” Metal under severe conditions, and have every
confidence in recommending it to work under high temperatures. The “ MAC ” valve has
been designed to adopt this metal for the renewable valve and seat.

Upwards of 500 tons of Standard Steel Castings Kept in stock.

We can give immediate delivery of iron and steel Valves.

Illustrated Catalogue Post Free on Application.

J. HOPKINSON & G» L° Huddersfield,

Makers of Patent Safety Boiler Mountings and Valves

For High Pressure Superheated Steam, High-class Exhaust and Water Sluice

Valves for Condensing Plants, &c., Automatic Exhaust Valves, Reducing

Valves, Steam Traps, &c., &c.

Depots & Showrooms —London, Glasgow, Edinburgh, Cardiff,
Oldham, Blackpool, Paris & Petrograd.