February 9, 1917.

THE COLLIERY GUARDIAN.

273

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Simplex Conduits, Limited,

GARRISON LANE, BIRMINGHAM.

113-117, Charing Cross Road, London, W.C.

16, Corporation Street, Manchester.

72a, Waterloo Street, Glasgow.

61-65, High Bridge, Newcastle.

10 & 11, Denmark Street, Bristol.

6, White Horse Street, Leeds
96, Whitechapel, Liverpool.

14, Heathfield Street, Swansea.

4, Westgate Street, Cardiff.

1, Crimon Place, Aberdeen.

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciality—

COAL SCREENING«CONVEYING

SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.

A V .



WORK IN
BRITAIN
COLONIES.

CONSIDERABLY OVER
100 PLANTS H
Estimates and Designs on application.

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

6'^ TO 8^ SAVING IN FUEL, or 1 2^ TO 1 5% MORE STEAM

SINGLE HOOD

Circulator

39, Victoria Street, London, S. W.

/CHECKS \
AND

\ BRASS /
LlabelsJ

PROTAN A Commercial form of TANNIC ACID

___	(Containing 48—50 % TANNIN).

For BOILERS.

BRITISH IVI ANU fACIUKE.

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.

Composition can toe toa-sed on svn;.lysis of water.
Samples and further particulars from
CLEMONS, MARSHALL & CAR BERT,
Branch of The Yorkshire Dyeware and Chemical Co. Ltd., Leeds.

PATENT

“MAC” VALVE.

1.. M B|
isi__^aoiiiiiiiti

it

Figure
Figure

Suitable for the
Highest Steam Pressures.

Fitted with
flopkinson’sPlatnam ”
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and valve are withdrawn,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.

8200—Inside Scre-w

8205-Outside Screw

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, 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 SOO tons of Standard Steel Castings kept in stock.

JVe can give immediate delivery of iron and steel Valves.

Illustrated Catalogue Post Free on Application.

J. HOPKINSON & Gs 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.

No. 374.