DeZURIK PEC ECCENTRIC PLUG
VALVE CIS SOFT RUBBER LINED
Soft Rubber Lined Eccentric Plug
Valve in Slurry Service
The DeZURIK CIS (Cast Iron) Soft Rubber Lined
Eccentric Plug Valve has proven to be an excellent
valve selection for on-off corrosive and abrasive
slurry service. DeZURIK soft rubber lined valves
are used in ash handling systems, scrubber
circulating and effluent discharge, thickener feed
and under-flow, ball and rod mill feeds, classifier
feeds, reclaimed water, and tailing systems. The
combination of the raised seat and eccentric action
allows solids to be wiped away to provide positive
closure. The quarter turn action of the valve
contains all process media inside the valve body.
There is no discharge to the outside environment
each time it is operated.
BULLETIN 12.00-2
SEPTEMBER 2012
Choice of manual or
powered actuators in
rugged sealed enclosures.
Multiple V-Ring
packing provides
reliable stem seal.
Heavy duty
stainless steel
bearings with grit
excluder seals
assure long,
trouble-free life.
The standard CIS Soft Rubber Lined Valve can be
provided with several additional features which
make it even more suitable in special applications.
Purge connections can be placed in the valve body
directed at the plug face in the open position,
which allow the area between the plug and the
valve body to be flushed if necessary. Because
the valve is normally mounted in reverse flow in
a slurry application, it is recommended that the
nickel seat be exposed when pressure is in excess
of 100 psi (690 kPa) to insure drip-tight shut-off.
Carbon steel construction can be provided,
which enables the CIS to be applied to slurries
up to 450 psi (3100 kPa) C.W.P. For acidic slurry
applications, additional standard grit excluders can
be purchased. The CIS Soft Rubber Lined Valve
is available with hard rubber bearings in lieu of
the standard stainless steel, and the stainless
plug in lieu of the standard cast iron. The factory
should be consulted on services with flows above
11' (3m) per second or particles larger than 1/16"
(.0625mm).
It is recommended that either a worm gear or
cylinder operator be selected for CIS Soft Rubber
Lined Eccentric Valves in slurry service.
Valve body flange
faces and all
internal body,
plug and cover
surfaces are lined
with soft rubber
to resist abrasion.
Body of cast iron or carbon
steel. Pressure up to 450 psi
(3100 kPa). Sizes 3–54"
(75–1400mm).
Eccentric action plug moves into
and away from the seat, which
eliminates abrasive wear.
Size Range/Pressure Rating
Size Range: 3–54" (75–1400mm)
Pressure Rating: 3–12" (75–300mm) valves — 175 psi (1210 kPa) C.W.P.
14–54" (350–1400mm) valves — 150 psi (1035 kPa) C.W.P.
Higher pressures to 450 psi (3100 kPa) available upon application.
Refer to bulletin 12.00-1D for ordering information.
© 2012 DeZURIK
Proper Installation
The proper installation of the DeZURIK CIS
Soft Rubber Lined Valve in a slurry application
is critical to prevent solids from packing into
the valve body, restricting the plug movement.
This can be accomplished by installing the valve
with the flow against the face of the plug in the
closed position and the valve on its side with
the plug rotating to the top of the pipeline in the
open position.
Seat
Where the possibility of overhead drainback
exists, the valve should be installed with the plug
facing in the overhead drainback condition.
The DeZURIK CIS Soft Rubber Lined Valve is
not designed to be a throttling valve. This valve
should be operated to either the full open or full
closed position.
For Pump Isolation Service, install
Seat
the discharge valve with the seat
downstream from the pump
Flow
and with the plug rotating to
the top of the pipeline in
the open position
Shut
Flow against face of plug prevents
solids from packing in body cavity
while shut. Where there is no
chance of overhead drainback,
install valve with flow against face
of plug. Install valve laying on its
side so plug rotates 90° to open.
This keeps plug and journals free
from sediment.
Valve Design
Compression fit where lining
contacts hard rubber bearings
and meets rubber lining on
plug at top and bottom journals
excludes abrasive particles and
seals metal surfaces of body
and bonnet from contact with
corrosive fluid.
Top and bottom journals
furnished with permanently
lubricated stainless steel
bearings.
Open
Install valve so plug
rotates up 90° to open.
This prevents sediment
from sticking plug open.
Top Bearing
Seat
Slurry in
Vertical Line
Where the possibility
of overhead drainback
exists, install valve
with flow against back
of plug. This prevents
drainback solids from
Flow
Adjustable multiple ring PTFE
packing prevents stem leakage and
compensates for packing wear.
Large port opening and straight
through flow path minimize
turbulence and wear caused by
impingement.
Valve body flange faces and
all internal body, plug and
cover surfaces are lined with
soft rubber to resist abrasion.
packing into body.
Grease fittings in top and
bottom journal bearings
provide for easy lubrication
and aid in preventing solids
from forming or entering the
journal area. This is standard
on cast iron and optional on
hard rubber bearing.
Optional Alloy Plug and
Hard Rubber Bearings
Bottom Bearing
Hard Rubber
Soft Rubber
Sales and Service
For information about our worldwide locations, approvals, certifications and local representative:
Web Site: www.dezurik.com E-Mail: info@dezurik.com
250 Riverside Ave. N. Sartell, Minnesota 56377 • Phone: 320-259-2000 • Fax: 320-259-2227
Design features, materials of construction and dimensional data, as described in this bulletin, are provided for your information only
DeZURIK, Inc. reserves the right to incorporate our latest design and material changes without notice or obligation.
and should not be relied upon unless confirmed in writing by DeZURIK, Inc. Certified drawings are available upon request.
Printed in the U.S.A.
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