November 19, 1915.

THE COLLIERY GUARDIAN.

1023

STOP CORROSION

and SAVE EXPENSIVE REPAIRS & RENEWALS
BY APPLYING

“ BITUMASTIC ” SOLUTION

TO ALL STRUCTURES EXPOSED TO

SEVERE CORROSIVE & CLIMATIC CONDITIONS.

“ BITUMASTIC ” is a brilliant black. Supplied ready for use.

DESCRIPTIVE BOOKLET ON APPLICATION TO SOLE MANUFACTURERS—

WAILES DOVE BITUMASTIC LI? Newcastle-on-Tyne,

And at London, Liverpool, Manchester, Glasgow, Cardiff, Birmingham, Leeds, &c.
’Phones in every office.	Telegrams—“ Bitumastic.”

QUALITY m SWITCH GEAR.

LIQUID
SWITCH
GEAR
of
HIGH-
CLASS
MAKE
and
GOOD
DESIGN.

WRITE

for

LIST

No. SO

with

PRICES

and

OUTPUTS

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciality--

COAL SCREENING s CONVEYING

> ■

'■ • -

■

I. /■

■■

SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER



CONSIDERABLY OVER

100 PLANTS

NOW AT WORK IN
GREAT BRITAIN
AND THE COLONIES.

J. H. HOLMES & CO., Newcastle-on-Tyne.

Estimates and Designs on application.

Agent f«r South Woles: A. LEIGHTON STEVENS, IS, Fields Road, Newport, Mom.

The

Gosforth

Foundry

Co. Ltd.,

Malleable

Ironfounders,

Dronfield,
near
Sheffield.

Makers of all kinds of Driving and Elevator

Chains, Sprocket Wheels, Elevator Buckets, &c.

PATENT

“MAC”

t-W

■<'5SS

I H Bl

Figure 82OO-Inside Sox?ew
Figure 8205—Outside S<3X»ew

VALVE.

Suitable for the
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and valve are withdrawn,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” TfcffetaJL
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 p’rts 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 & 6s LD Huddersfield,

Makers of Patent Safety Boiler Mountings and Valves

For High Pressure Superheated Steam, High-cla«s 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.	_____________________