April 14, 1916.

THE COLLIERY GUARDIAN.

699

THERE IS A

MARK

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.
___________

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

Speciality—

COAL SCREENING t CONVEYING



Hand-Driven Fans

for intermittent work. Made in 3 sizes.

Kjh

■.•A'- 1 ...A

- Mg 1

” ■	'	•	X. ’. •.

' •

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

[tub

/ BOLTS

[cupS9S9

Onion
Brand I

-







HOWARD STREET

OdSmBEbEh

«=>
o

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_

_

_

_

__

_

GBM

PATENT

Estimates and Designs on application.

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

____________________________________________________________________

“MAC” VALVE.

Suitable for the
Highest Steam Pressures.

Fitted with

flopkinson’su 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and valve are withdrawn,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.

Thf 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, hut 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 & C“ U 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.

No. 342.	__________________________________