Emerson KGA User Manual

4
3 80 7½ 190.50 6 152.40 4 ⅝ - 11 2 50.80 2½ 63.50
4 100 9 228.60 7½ 190.50 8 ⅝ - 11 2 50.80 2½ 63.50
6 150 11 279.40 9½ 241.30 8 ¾ - 10 2 50.80 2½ 63.50
8 200 13½ 342.90 11¾ 298.45 8 ¾ - 10 2¼ 57.15 2¾ 69.85
10 250 16 406.40 14¼ 361.95 12 ⅞ - 9 - - 3 76.20
12 300 19 482.60 17 431.80 12 ⅞ - 9 - - 4 101.60
14 350 21 533.40 18¾ 476.25 12 1 - 8 - - 4½ 107.95
16 400 23½ 596.90 21¼ 539.75 16 1 - 8 - - 4¾ 120.65
18 450 25 635.00 22¾ 577.85 16 1⅛ - 7 - - 5½ 139.70
20 500 27½ 698.50 25 635.00 20 1⅛ - 7 - - 5½ 139.70
24 600 32 812.80 29½ 749.30 20 1¼ - 7 - - 6 152.40
26 650 34¼ 869.95 31¾ 806.45 24 1¼ - 7 - - 6 152.40
30 750 38¾ 984.25 36 914.40 28 1¼ - 7 - - 7 177.80
36 900 46 1168.40 42¾ 1085.85 32 1½ - 6 - - 8½ 177.80
42 1050 53 1346.20 49½ 1257.30 36 1½ - 6 - - 9 203.20
48 1200 59½ 1511.30 56 1442.40 44 1½ - 6 - - 9½ 241.30
54 1350 66¼ 1682.80 62¾ 1593.90 44 1¾ - 5 - - 10½ 241.30
60 1500 73 1854.20 69¼ 1759.00 52 1¾ - 5 - - 11 266.70
CLARKSON SLURRY KNIFE GATE VALVES
KGA+
4 OPERATION
TABLE 3 - BOLTING DIMENSIONS
Valve size
Flange
diameter
Bolt circle
diameter Bolt holes
no.
Bolt
size/thread
Bolt lengths (see note)
Without retainer flg. With retainer flg.
NPS DN inch mm inch mm UNC inch mm inch mm
NOTES
• Flange dimensions per ASME B16.5/150 for NPS 2 - 24 (DN 50 - 600) and MSS SP44 for NPS 26 - 60 (DN 650 - 1500).
• Type B standard washers are not included in bolt / stud sizing.
• Mating flange thickness assumed to match ASME B16.5/150 for NPS 2 - 24 (DN 50 - 600) and MSS SP44 for NPS 26 - 60 (DN 650 - 1500).
1. Clarkson slurry knife gate valves are
suitable for on-off service only. They are
notto be used in a throttling application.
2. To close the valve and provide isolation,
the actuator (handwheel, bevel gear,
air/hydraulic cylinder or electric motor
actuator) moves the metal gate in a linear
motion between the elastomeric sleeves
to shut off the flow. To open, reverse the
operation and the gate moves up and out
from between the sleeves, opening the
valveport.
3. Matching elastomer sleeves seal against
each under a high compression load
when the valve is open, creating the valve
pressure vessel. When the valve is closed,
the sleeves seal against the gate face,
isolating upstream from downstream.
SeeFigures 2 and 3.
Note: it is normal for the KGA+ to discharge
media during opening and closing cycles.
This helps prevent any solids from building
up between the sleeves that would prevent
a tight seal when the valve is fully open or
closed. Discharge can be controlled with
the use of an optional splash guard. Do not
install valve over walkways, electrical or
other critical equipment without the use of
splash guards or similar considerations.
4. As the gate strokes, a gap is created
between the facing sleeves, allowing any
media that could potentially clog or jam the
valve to be purged out from between the
sleeves, and potentially expelled outside
thevalve housing to atmosphere.
5. The KGA+ valve incorporates a built-in
clean-out area at the base of the housing
assembly. The clean-out area may be
enclosed by an optional, removable
splash guard assembly. This splash guard
will allow controlled drainage of any
accumulated solids that may prevent full
gate closure. Flush water can be used to
improve the drainage efficiency. With the
splash guard in place, any solids, slurry, or
flush water ejected from the valve can be
handled in a controlled manner. See Section
‘Installation instructions for splash guard’.
6. All valves should be operated within the
design pressure and temperature ranges.
Under no circumstances should the valves
be operated at conditions outside these
parameters.
Note: actuated Clarkson valves have a
maximum recommend stroke speed of
1” (25 mm) per second. Exceeding this
speed can shorten sleeve life and may
void warranty. Speed controls provided by
factory will require adjustment in the field
to obtain proper stroke speed against actual
operating conditions.

Emerson KGA Specifications

General

Brand	Emerson
Model	KGA
Category	Control Unit
Language	English