•June 30, 1916.

THE COLLIERY GUARDIAN.

1227

•t





PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

SIMPLEX
WATERTIGHT
BULKHEAD
FITTINGS

are manufactured at our
Birmingham Works, in cast
iron or brass.

Supplied to Admiralty, War
Office, and Government
Departments.

Simplex Conduits Ld.,

WORKS :

GARRISON LANE,
BIRMINGHAM,
r

Speciality—

COAL SCREENING.CONVEYING

SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.

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CONSIDERABLY OVER

100 PLANTS



NOW AT WORK IN
GREAT BRITAIN
AND THE COLONIES.

Estimates and Designs on application.

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

GREENWOOD & BATLEY Ltd.,
ALBION WORKS, LEEDS.

Telephone—5200 LEEDS.	I Telegrams—“GREENWOOD. LEEDS’

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STEAM TURBINES

HIGH PRESSURE,—EXHAUST STEAM,—MIXED PRESSURE.
FROM 3-B.H.P. TO 600-B.H.P.

Part of order for
totally enclosed gas-
proof Mining Motors
with ball bearings and
plate glass spy holes.

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ELECTRIC MOTORS

AND GENERATORS. A.C. AND D.C. FOR ALL PURPOSES.

Figure 8200— Inside

F'irfojfe 8205-0utside Screw

LATENT

VALVE.

Suitable for the
Highest Steam Pressures.

Fitted with
ffopkinson’su Platuam"
Metal Renewable Valve
and Seat.

AU 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and valve are withdrawn,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 & C° LD 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.