Clarkson KGA Heavy Duty Slurry Knife Gate Valve
3” thru 60”
Field-proven Clarkson KGA slurry knife gate valves
feature heavy-duty, full port elastomer linings offering
the ultimate in protection against heavy slurries.
Features
• Meets a wide range of abrasion,
corrosion, temperature, and pressure
requirements.
• May be used in wet or dry services
easily dealing with large, heavy
particles and tramp material.
• Heavy-duty, field replaceable
elastomer sleeves available in two
configurations:
- J-Ring External Stiffener
- Internal stiffener (patented U.S.
5,271,426)
• No metal parts in contact with the
flowing slurry.
• Unobstructed flow eliminates
turbulence, minimizes pressure drop
across valve.
• 100% Isolation; bubble-tight shut-off
results in absolutely zero downstream
leakage.
• Double-seated design provides
bi-directional flow and shut-off.
• No seat cavity where solids can
collect and prevent full gate closure.
• No gate or stem packing is required,
eliminating packing leakage and
maintenance.
• Adaptable frame (yoke) design
featuring a top-removal stem nut.
General applications
Technical data
• Mining
Size range
• Power
Operating pressure : 100 psi
• Pulp and paper
Size range
• Alumina
Operating pressure : 75 psi
• Chemical
Size range
• Cement
Operating pressure : 50 psi
: 26” thru 36”
: 26” thru 54”
Sleeve
: Natural rubber
standard
Temperatures
: Standard sleeve
rated to 160°F, up to
400°F with proper
elastomer selection
Flow Control
Total Flow Control Solutions™
: 3” thru 24”
Copyright © 2004 Tyco Flow Control. All rights reserved.
CLKMC-0113-US-0406
Clarkson KGA Heavy Duty Slurry Knife Gate Valve
3” thru 60”
Features
Standard configuration
How the KGA sleeves work: Matching sleeves are placed in the KGA valve housing to seal
against the gate when the valve is closed and seal against each other when the valve is
open. As the gate moves from open to closed position, it separates the facing sleeves. A
stiffener ring molded into the elastomer retains the roundness of the sleeves during opening
and closing cycles. The unique KGA sleeve assembly provides positive sealing action when
the valve gate is closed. When the gate is open, the sleeves provide an unobstructed port
and protect metal parts from the flowing slurry.
Open position:
Closed position:
• Gate positioned above seals
• Metal parts not in contact with slurry
• Gate travels through sleeves to provide
blind flange shut-off and expel solids
• Unobstructed port area eliminates
turbulence, minimizes pressure drop
across valve
• 100% Isolation-bubble tight shut-off
results in absolutely zero downstream
leakage
• No seat cavity where solids can collect
and prevent full gate closure
• Double-seated design provides
bi-directional flow and shut-off
• Controlled stroke prevents gate from
penetrating too far, minimizing stress on
sleeve
• Ductile iron valve housing (body)
3” thru 42”
Cast or fabricated carbon steel housing
(body) above 42”
• 316 stainless steel gate rated for
100 psi (3” thru 12”)
75 psi (26” thru 36”)
50 psi (42” thru 54”)
• Mild steel body spacers and actuator
support frames
• Flat-faced body flanges drilled and
tapped (3” thru 10”) or slotted
(12” thru 54”) to match ANSI B16.5
Class 150 (3” thru 24”) or MSS SP44
(26” thru 54”) companion flanges
• High tear strength natural rubber
sleeves with stiffener rings
• Natural rubber-covered carbon steel
sleeve retainer flanges (10” thru 60”)
Optional
• Various gate materials:
316L SS
317L MN
17-4 PH
Jessop 700
Ferralium 255
317L SS
Alloy 20
Hastelloy® C-276
Others
• Sleeve configuration and elastomers
(see page 3)
• Stem covers
• Splashguards
• Actuators (see page 4)
• Control accessories
• Fabricated housing (body) of most any
weldable alloy in any standard size
Optional sleeve configurations and elastomers
Standard Sleeves external stiffener ring
Optional encapsulated
stiffener ring sleeve
• Maintains round configuration of sleeve
• Maintains round configuration of sleeve
• Relieves stresses on seal
• Relieves stresses on seal
• Scrapes scaling off gate when it cycles
• Used when stiffener ring contact with the
gate is undesirable
J-Ring, 3” - 26”
Pipe Ring, 30” - 54”
Copyright © 2004 Tyco Flow Control. All rights reserved.
3” - 16”
18” - 24”
CLKMC-0113
2
Clarkson KGA Heavy Duty Slurry Knife Gate Valve
3” thru 60”
Available sleeve materials:
Features
Heavy-duty frame (yoke) designed to
accept top removal stem nut, bevel gear or
cylinder actuator without welding
Natural Rubber: This category includes all
natural gum elastomers and synthetic
Polyisoprene. Advantages - High tensile
strength, superior resistance to tear and
abrasion and good flexibility at low
temperatures. Limitations - Poor resistance
to ozone, acids and most hydrocarbon fuels
and greases. Maximum continuous operating
temperature, 160°F.
Optional open and closed lockout/tagout
positions
The stainless steel gate is completely
withdrawn from the process flow in the open
position and can be inspected or replaced
without taking the valve out of service
EPDM-HTP and EPDM: Advantages - Both
types have excellent weatherability, very
good flexibility at low temperature, good
resistance to alkalis, acids, alcohols,
ketones, glycols and oxygenated solvents,
superior resistance to water and steam.
Limitations - Poor resistance to hydrocarbon
fuels, mineral-oil-based-fluids and greases
and synthetic hydrocarbon lubricants.
Maximum continuous operating temperature,
EPDM-HTP 300°F, EPDM 160°F.
316 stainless steel gate is standard
Packingless design
Elastomer sleeve molded with an integral
stiffener ring to properly center the sleeve in
the valve body housing and resist the high
shearing forces present when the gate
cycled
CSM (Chlorosulphonated polyethylene):
Advantages - Good abrasion resistance,
excellent resistance to many corrosive and
oxidizing chemicals, moderate resistance to
oil and gasoline. Limitations - Poor
resistance to aromatic solvents, ketones,
esters, limited flexibility at low temperature.
Maximum continuous operating temperature,
200°F.
Unobstructed flow area, fully lined with
elastomer sleeves, no metal-to-metal
contact, no guides or wedges
Double sleeved design provides a ”blind
flange” shut-off when the gate is closed.
The valve’s sealing surface is between two
thick, rubber sleeves that are compressed
into the ductile iron valve housings
Chlorobutyl: Advantages - Outstanding
impermeability to gases and vapor, very
good resistance to heat, oxygen, ozone and
sunlight. Excellent energy absorption and
resistance to alkalis and oxygenated
solvents, superior resistance to water and
steam. Limitations - Poor resistance to oil,
gasoline and hydrocarbon based solvents,
poor resilience. Maximum continuous
operating temperature, 250°F.
Neoprene: Advantages - Moderate
resistance to oil and gasoline, very good
resistance to ozone, abrasion, flex cracking,
alkalis and acids. Available in a non-black
color. Limitations - Poor resistance to
aromatic and oxygenated solvents, limited
flexibility at low temperature. Not
recommended for high cycle applications.
Maximum continuous operating temperature,
200°F.
Nitrile-HTP and Nitrile: Advantages - Very
good resistance to oil, gasoline, alkalis and
acids. Good resistance to hydrocarbon
based solvents. Limitations - Inferior
resistance to ozone and oxygenated
solvents. Maximum continuous operating
temperature, Nitrile–HTP 225°F, standard
Nitrile 200°F.
Fluroelastomer: Advantages - Outstanding
resistance to high heat, excellent resistance
to oil, gasoline and hydrocarbon solvents.
Very good impermeability to gases, vapor
and oxygen. Limitations - Poor resistance to
tear and cut growth, very little resistance to
oxygenated solvents. Maximum continuous
operating temperature, 400°F (Consult
factory for temperatures higher than 400°F).
Elastomer covered retainer flanges
eliminates need for gaskets (optional on
sizes 3” - 8”, standard on 10” and larger)
Cast ductile full flanged body housing to suit
ANSI B16.5/150 through 24”, sizes 26” and
larger suit MSS-SP44
Mild steel body spacers separate the body
housing halves and serve as an external
guide to the valve’s knife-edge gate
Clean-out area
Specification
Clarkson KGA slurry knife gate valve
Heavy duty, slurry knife gate valve shall be flat-face flanged, packingless, rubber-lined,
bidirectional valve suitable for a wide range of industrial applications. The full port design shall
have no internal obstructions and will provide a ”blind flange” shut-off when the gate is closed.
The valve’s sealing surface is to be between two thick, rubber sleeves that are compressed
into the ductile iron valve housings. The sleeve will be molded with an integral stiffener ring
that locates the sleeve in the valve housing and helps the sleeves resist the high shearing
forces present when the gate is driven between them. Mild steel body spacers shall separate
the body housing halves and serve as an external guide to the valve’s knife-edge gate. The
stainless steel gate shall be completely withdrawn from the process flow when in the open
position, and can be inspected and replaced, if necessary, without taking the valve out of
service. When the valve is in the closed position, the downstream sleeve can be replaced
while the upstream portion of the valve is still holding pressure. The valve body housing to be
full flanged, drilled and tapped or slotted to suit ANSI B16.5/150 through 24” and MSS-SP44
above 24”. Valve is equipped with a heavy steel fabricated handwheel frame (yoke) which can
be converted to bevel gear in the field, complete with a 304 stainless steel rising stem (except
cylinder actuated valves). All nonferrous exterior surfaces shall be painted to factory standard.
Specify Clarkson KGA slurry knife gate valve from Tyco Valves & Controls.
Copyright © 2004 Tyco Flow Control. All rights reserved.
CLKMC-0113
3
Clarkson KGA Heavy Duty Slurry Knife Gate Valve
3” thru 60”
MH
MG
AC
HC
M
M
E
G
F
D
A
C
H. Port diameter
J. Inlet diameter
K
B
Dimensions and Weights
Centerline to top
Valve
Size
C
Handwheel
MH
D
MG
E
AC
F
HC
G
A*
B**
3
7.50
6.88
8.88
18.93
21.38
21.38
4
9.00
6.88
11.00
22.00
23.33
23.94
6
11.00
7.00
13.00
28.00
31.82
8
13.50
7.25
15.25
32.90
14.89
K
MH
M
MG
M
Weight Weight
MH
MG
Weight
AC
Weight
HC
H
J
24.56
2.41
2.81
15.81
12
12
50
127
85
50
27.63
3.33
3.88
16.88
12
12
64
141
130
70
30.18
34.00
5.38
5.81
17.88
16
12
98
175
180
98
35.00
38.31
6.88
7.75
19.00
20
12
135
212
210
135
10
16.00
8.88
16.56
38.75
42.63
40.50
44.25
9.06
9.81
23.40
20
24
198
275
310
175
12
19.00
10.13
21.00
–
47.45
45.50
53.13
10.75
11.50
25.50
–
24
–
427
669
360
14
21.00
10.13
22.75
–
53.31
53.43
57.80
12.50
13.25
26.38
–
24
–
448
720
414
16
23.50
11.00
24.25
–
57.20
60.19
64.06
14.00
14.75
27.62
–
24
–
573
1125
550
18
25.00
12.25
26.50
–
66.75
67.62
68.75
14.88
16.75
30.35
–
24
–
875
1330
950
20
27.50
14.13
28.38
–
71.94
73.50
74.44
16.56
18.50
31.29
–
24
–
1054
1680
1200
24
32.00
14.63
33.80
–
86.19
88.00
89.63
21.19
23.00
34.75
–
24
–
–
2200
1400
26
34.25
14.66
36.75
–
–
–
93.63
23.50
25.00
–
–
–
–
–
–
1700
30
38.75
15.57
41.50
–
–
–
106.19
26.75
29.00
–
–
–
–
–
–
2150
36
46.25
18.50
48.25
–
–
–
119.25
31.88
35.00
–
–
–
–
–
–
3500
42
53.00
21.03
56.50
–
–
–
145.68
38.25
41.00
–
–
–
–
–
–
5200
48
59.50
21.13
60.35
158.25
43.98
54
66.19
20.75
67.25
172.88
48.98
–
–
–
–
–
–
–
–
–
–
–
* Flange diameter: Designed to match ANSI B16.5/150 through 24”, MSS-SP44 above 24”
**Face-to-face: Add 1/4” to 1/2” for ease of installation
Actuation
Note: Not all actuators shown are available on all valve sizes
MH Manual
Handwheel
BG Manual
Bevel Gear
AC Air Cylinder
HC Hydraulic Cylinder
EM
Electro-mechanical
Hydra-Helper
Tyco Valves & Controls
www.tycovalves.com
Tyco Flow Control (TFC) provides the information herein in good faith but makes no representation as to its comprehensiveness or accuracy. This data sheet is intended only as a guide to TFC products and services.
Individuals using this data sheet must exercise their independent judgment in evaluating product selection and determining product appropriateness for their particular purpose and system requirements. TFC MAKES
NO REPRESENTATIONS OR WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE WITH
RESPECT TO THE INFORMATION SET FORTH HEREIN OR THE PRODUCT(S) TO WHICH THE INFORMATION REFERS. ACCORDINGLY, TFC WILL NOT BE RESPONSIBLE FOR DAMAGES (OF ANY KIND OR
NATURE, INCLUDING INCIDENTAL, INDIRECT, OR CONSEQUENTIAL DAMAGES) RESULTING FROM THE USE OF OR RELIANCE UPON THIS INFORMATION. Patents and Patents Pending in the U.S. and foreign countries. Tyco reserves the right to change product designs and specifications without notice.
Copyright © 2004 Tyco Flow Control. All rights reserved.
CLKM-0113
4