Flowrox Rotary Disc Valve (LRD)0 pages

03/13

Flowrox Rotary Disc Valve (LRD)
Flowrox Rotary Disc Valve is built with a cast body and features a
heavy-duty steel gate. LRD is a unique rotating disc valve designed
specifically for heavy abrasive and corrosive slurries. The patented
design allows the valve to cycle in heavy slurries without sticking or
leaking and with minimum wear. LRD is available with pressure
ratings from 10 to 100 bar.

VALVE OPERATION

Features
● No blocking or leakage =
100% tight.
● No leakage to atmosphere.
● No sticking.
● Long wear life, (due to
rotating gate/disc).
● Self-clearing gate action.
● Seals in both directions.
● Repacking of gland stem
seals under pressure.
● Wedge for positive seal.
● Cut away to clean seating
area.
● Seal out of flow when in
open position.

Applications
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Mining and metal industries
Mineral processing
Power generation
Sand and gravel
Chemical
Pulp and paper
Water and Wastewater
treatment

The LRD Valve is designed for leak tight shut off
slurries and liquids within a pipeline. The valve is
designed to be operated only in the fully open or
fully closed position. As the actuator is opened or
closed, the disc is allowed to rotate. This happens
due to the pressure pushing against the disc,
causing the disc to touch the valve seat and
rotate. As the valve is cycled, the disc rotates a
few degrees, seating in a different position each
time. The wedge gate support has a cutaway
behind the disc clearing debris away and thus,
ensuring the disc closes and seals every time.
The very nature of the construction allows a
maximum of flexibility in customizing to meet
specific needs, in terms of materials pressure
rating etc. The body and bonnet are made of cast
steel and can be made out of different materials to
best suit the customer needs. The bonnet houses
the rotating disc when open and seals around the
spindle.

HOW THE VALVE SEALS WORK?
LRD is a rotating disc valve for slurry. The isolation and sealing is
between the replaceable rotating disc and seat.
The disc seals against the seat when closed with the help of a tapered
wedge gate support. The seat can be supplied in elastomer urethane,
rubber or PTFE. This rotating disc and seat are both replaceable on site.

REPLACEABLE DISCS
LRD valve’s design allows for onsite replacement of the rotating disc.