May 1, 1914.

THE COLLIERY GUARDIAN.

977

BRUSSELS EXHIBITION: “GRAND PRIX.”	ROUBAIX EXHIBITION, 1911: GRAND PRIX.”

Hopkinson-Ferranti

----- PATENT --

STOP VALVE

For Steam and High Pressure Water Service.

The GREATEST ADVANCE in VALVE CONSTRUCTION of the TIMES.

Less Weight, Cost & Leakage.

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 reconverting the
velocity into pressure, thereby passing
an amount of steam equal to full
carrying capacity of pipe.

SELLING POINTS:

Passes the same quantity of steam as a full-bore valve.
Reduction in cost over ordinary fullway valves.

Considerably less weight.

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

Reduces vibration in pipes.

Graded opening—no sudden rush of steam in opening.
No bye-passes necessary, thereby saving their cost.
Is not subject co wedging action or mechanical strain.
The discs slide with a flexible pressure upon the
seats, thereby preventing cutting and scoring.

When the valve is open the seats are protected from
the flowing fluid by the eyepiece.

Always easy to open 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

M0PK.NS0NS “PIATMAM” METAL

Suitable with Superheated Steam

UPWARDS OF 9,000 IN USE AT 220 Collieries,
180 Electric Power Stations, 90 Iron and Steel
Works, 130 Textile Mills. Turbine Makers, &c., *c.

VALVES in STOCK WITH
IRON or STEEL CASINGS.

Hopkinson’s Patent Safety

Boiler Mountings & 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.

r n s o n's

PBIPATENT

PJOSITE CLAN Di 1

Upwards of 500 tons ol Standard Steel Casting's kept in stock.
We can give immediate delivery of iron and steel Valves.

Write for Illustrated Specifications and Catalogue No. 660, 4th Edition.

J. HOPKINSON & CO. L= HUDDERSFIELD,

JSukerx of Patent Valves anti Patent Safety Boiler Mountings,

165, Queen Victoria Street, LONDON; 41, Bothwell Street, GLASGOW; 2, York Buildings, York
Place, EDINBURGH; Royal Buildings, Park Place, CARDIFF; 7, Manchester Street, OLDHAM;
w ,76	PARIS and ST. PETERSBURG.