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NotchFlo DST
Available Valves
Class 600 3-Stage: Level C only
Class 900 and 1500 4-Stage: Levels A, B,
(1)
and C
End Connection Styles and Ratings
Flanged: Consistent with Class 600, 900, and
1500 per ASME B16.34
Socket Welding: Consistent with Class 600, 900,
and 1500 per ASME B16.34
Buttwelding: Consistent with Class 600, 900,
and 1500 per ASME B16.34
Also see table 2
1. Levels A, B, and C provide for varied pressure drops and capacity.
2. The pressure/temperature limits in this manual and any applicable standard or code limitation for valve should not be exceeded.
Table 2. Approximate Weights (Valve and Bonnet Assemblies)
VALVE DESIGN
3-Stage Globe Valves
3 Stage Globe Valves
4-Stage Globe Valves
4 Stage Globe Valves
4-Stage Angle Valves
4 Stage Angle Valves
1. SWE available on 1-, 1.5, and 2-inch size only.
2. Screwed end available on 1- and 2-inch Class 600 only.
3. BWE available on globe valves only.
NotchFlo DST trim utilizes a series of notched flow
restrictions and expansions to control the pressure
drop of the fluid. The amount of pressure drop per
stage is controlled to prevent cavitation problems
and minimize erosion issues.
Flow passage configuration provided by the
multi-stage plug and cage design make the Design
2
Table 1. Specifications
Shutoff Classification
(2)
Flow Characteristic
Flow Direction
Approximate Weights
VALVE SIZE,
CLASS
INCHES
1
600
2
600
3
600
4
600
2
900 and 1500
900
3
3
1500
900
4
4
1500
1
900 and 1500
1.5
900 and 1500
2
900 and 1500
3
900 and 1500
4
900 and 1500
NotchFlo DST valves well-suited for applications
involving fluids with entrained particles. This is a
potentially serious problem for other anti-cavitation
valve designs which are subject to clogged flow
passages.
Design of the trim allows for high rangeability.
–12
3
Class V: [5x10
m
/sec/bar/mm of port diameter
(0.0005 mL/min/psid/in) of water at service
pressure drop] per ANSI/FCI 70-2 and IEC
60534-4
Linear
Flow up
See table 2
KILOGRAMS
(1)
Socket Weld
(3)
Flanged
Butt Weld
,
(2)
Screwed
19
15
40
31
72
51
120
80
93
83
177
- - -
185
140
327
- - -
338
282
48
41
55
43
93
97
174
- - -
285
- - -
Instruction Manual
Form 5794
February 2005
POUNDS
(1)
,
Socket Weld
(3)
Flanged
Butt Weld
(2)
Screwed
42
34
88
68
158
112
264
176
204
184
391
- - -
408
308
722
- - -
745
622
105
91
121
94
206
214
384
- - -
628
- - -
,
,
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