May 16, 1913.

THE COLLIERY GUARDIAN.

1005

INDUCED DRAFT FAN

IS A GOOD INVESTMENT

THE cost of m •* Sirocco ”
Induced draft Plant is
about 30 to 40 °/0 of that of a
chimney of equal capacity.

THE power to drive the Fan
varies from 3/4ths to 2 °/„
of the total power generated,
while the saving frequently
amounts to from 15 to 20 °/0.

INCREASES the steaming
• capacity of existing boilers
and thereby increases the
Works production.

Reduces the coal Bin be-
. cause cheaper coal can be
used than with natural draft.

Send for
Catalogue
19 H.

PERMITS the use of the
waste heat in the flue
gases by means of economisers,
superheaters, &c.

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Spec iality—

COAL SCREENING & CONVEYING.

SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.



CONSIDERABLY OVER

inn pi iiTt

fIIw I O and TH£ colon[es

Estimates and Designs on application.

Agent for South Wales: A. LEIGHTON STEVENS, 16, Fields Road, Newport, Mon.

OPEN BRIDLE.

Made also in Box Nose.

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______________

pONGAflfl

Perfect

Eye & Head Shield.

Light ! Comfortable !
Durable I Reasonable I

Sole Agents :

LEGARD& SON,

Pit Pony Harness Makers
and Contractors,

LEATHER MERCHANTS,
PHONE 11. Barnsley.

WAILES, DOVE & Co.’s

Patent BITUMASTIC Solution

-------------- GIVES --

PERMANENT PROTECTION FROM
CORROSION TO ALL IRONWORK.

A BRILLIANT BLACK COLOUR.	SUPPLIED READY FOR USE.

EASILY APPLIED BY UNSKILLED LABOUR.

CHEAPER THAN ORDINARY OXIDE PAINTS, OWING TO ITS
GREATER COVERING CAPACITY AND LASTING QUALITIES.

WRITE FOR PAMPHLET OF FULL PARTICULARS TO-
Head Office NEWCASTLE-ON-TYNE.
Also at London, Liverpool, Manchester, Glasgow, Cardiff, Birmingham, Leeds,
Hull, &c.
Every Office on the Telephone	- Telegrams “BITUMASTIC.”

Brussels Exhibition: “Grand Prix.” Roubaix Exhibition, 1911: “Grand Prix.

HOPKINSON-FERRANTI

Patent STQp VALVE

For Steam and Hich Pressure Water Service.

The Greatest Advance in Valve Construction of the Times.

LESS WEIGHT, GOST AND LEAKACE.

This Valve has been invented and
designed to enable a valve having
operative parts of half the ordinary
diameter to pass a large amount of
steam through a small working part.
PRINCIPLE :

Converting the pressure of the
fluid into velocity and re-con-
verting the velocity into pressure,
thereby passing an amount of
steam equal to full carrying capa-
city of pipe.

SELLINC POINTS:

Passes same quantity of steam as a full-bore
valve.

Reduction in cost over ordinary fullway
valves.

Considerably less weight.

Seats half diameter or ordinary sluice valve,
therefore halves possible leakage.

Reduces vibration in pipes.

Graded opening—no sudden rush of steam in
opening.

Nr> bve-nasses necessary, therebv saving their
cost	" ’ ’	”

Is not subject to wedging action or mechani-
cal strain.

The discs slide with a flexible pressure upon
the seats, thereby preventing cutting & scoring.

When the valve is open the seats are pro-
tected from the flowing fluid by the eyepiece.

Alwavu easv to onen and close under pressure.

It is an ideal valve for high temperature
superheated steam, as there are no cast iron
internal working parts.

Discs and Seats of

HOPKIN SON ’ S
“PLATNAM” METAL.

with Superheated Steam.

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E	_______

ImiPKins/n-fECRANTl- PATENT-

VALVES IN STOCK WITH IRON OR STEEL CASINGS.

UPWARDS OF 8,000 IN USE AT 220 Collieries, 180 Electric Power Stations, 90 Iron
and Steel Works, 130 Textile Mills, Turbine Makers, &c., &c.

HOPKINSON S 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.

Upwards of SOW ton* of Standard Steel Casting* Icept tn stock.

We can give immediate delivery of iron and steel valves.

Write for Catalogue 660, 4th Edition.

J. HOPKINSON & CO. LD.. Hnddersfield

No. 236 London, Glasgow, Edinburgh, Cardiff, Oldham, Paris & St. Petersburg.