October 8, 1915.

THE COLLIERY GUARDIAN.

721

Walter Scon Ltd.

Leeds,	LEEDS STEEL WORKS,	England

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

MANUFACTURERS OF

BRITISH STANDARD ROLLED STEEL JOISTS, CHANNELS,
TRAMRAILS AND PERMANENT WAY RAILS, &c.

Example of 10 in. x 6 in. 42 lb. R.S. Joists curved for Framework to Roadway.

/ *

/ <»
J

Pit Head Frame.
. Erected in Works
/ft for inspection.

\ I

® IS

ROLLED STEEL JOISTS for PIT PROPS,
FRAMEWORK TO ROADWAYS. &c.

STRUCTURAL STEELWORK FOR BUILDINGS, &c.

Mild Steel Blooms, Billets, Slabs, Tinbars, Rounds & Flats.

Rolls cut for Special Sections and to approved quantities.

Books of Sections and other information on application.

Speciality—

COAL SCREENING s CONVEYING



1 w

1

SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.



CONSIDERABLY OVER

inn pi antq

I MO I LH|W I O AND THE COLONIE'-
Estimates and Designs on application.

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

Compositions Plastic; Silicate of Cotton;
Asbestos, all kinds; Magnesias, &c.

ff. J. ORMROYDE,

Boiler Coverer & Manufacturer,
Denton Street, W1DNES. Tel. 153.

TELEP: 2978 (TWO LINES)

TELEG "THON”

HASLAM & STRETTON,U?

11,WINDSOR PLACE.

. ... CARDIFF. . .

ELECTRIC PLANT^ACCESSORIES

CABLES &• SWITCHES.

CARBON &- METAL	i f A I

LAMPS.	I I I M I

PATENT

“MAC” VALVE.

' I ■

-

Standard M.P. Turbine.

STEAM

TURBINES.

High Pressure

Mixed Pressure

Low Pressure

FOR

Ironworks

AND

Collieries.

Reliable.

Economical.

Compact.

Richardsons Westgarth & C LTD

MIDDLESBROUGH. HARTLEPOOL. SUNDERLAND.

Figure

Figure

8200-Inside Scx?ew
8205—Outside Sox*ew

The Renewable Valve ;

Suitable for the
Highest Steam Pressures.

Fitted with
Hopkinson’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and valve are withdrawn,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.

id Seat is made of

Hopkinson’s “	” 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 ” Met.il 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.
We can give immediate delivery of iron and steel Valves.

Illustrated Catalogue Post Free on Application.

J. HOPKINSON & C? LR 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 & St. Petersburg.

No. 306.____ _____________________________________________