September 15, 1916.

THE COLLIERY GUARDIAN.

521

HOPKINSONS

“RDS” Steam Trap

PATENT

SUITABLE FOR ANY PRESSURE.

A large number of these traps have been in use for several years, and our experience has been so satisfactory thai? we have every
confidence in recommending them to steam users. The workmanship and material are of the highest quality, and is altogether a
far superior article to the many cheap bucket traps now on the market.

SPECIAL
FEATURES.

Reliable.

Quick in Action.

No Dribbling.

Strong Intermittent

Quick

Pressure.

Fitted with Valve and
Seat of

Hopkinson’s ‘ PlatnanT
Metal, which is five
times harder than .
bronze and admirably
suitable for with* .
standing the cutting
action of the water.

CAST IRON BODY AND LID,
HOPKINSON’S “PLATNAM” METAL VALVE AND SEAT.

DESCRIPTION.

This steam trap is of the open
float type, and consists in its
simplest form of a Water Cham-
ber A, Float with central guide
B, Valve C, Water Inlet Pipe,
and Water Discharge Pipe.
The discharge pipe forms the
guide for the float.

The valve remains on its seat
until the float has sunk low
enough to touch the collar on
valve; it then immediately begins
to discharge.

The Gallery or Water Pocket
F is an important feature, as it
fills with water when the Float
is at rest; when the Float begins
to rise from its lowest position,
the water thus collected flows
through the hole G into the body
A, thus ensuring a rapid elevation
of the Float independent of a
small amount of water passing
into the trap. The valve is not
rigidly connected with the
bucket, and it is therefore held
on to its seat until the Float acts
on the Valve. This device is,
therefore, most valuable under
all conditions of working, but
more especially when the volume
of water entering the trap is
small. Its lifting effect on the
Float is indicated by the sharp-
ness with which the water dis-
charge is cut off.

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.

J. HOPKINSON & CO. LTD.,

HUDDERSFIELD.

No. 341