Emerson Fisher V250 Data Sheet
Product Bulletin
51.3:V250
November 2007
Design V250 Rotary Control Valve
The Design V250 Hi-Ball rotary control valve
(figure 1) is designed for heavy-duty throttling and
on-off applications. Depending on size, this valve
installs between two CL600 or CL900 pipeline
flanges. The Design V250 valve is available with a
single ball seal, flow ring, or dual-seal construction.
Single-seal constructions are used in tight shutoff
applications; the flow ring construction can satisfy
higher temperature requirements. The dual-seal
construction, with a seal in the inlet and outlet
openings, is used in bidirectional flow-shutoff
applications. The Design V250 Hi-Ball valve is
typically used for throttling and controlled flow
applications in gas transmission lines, gas
distribution, or liquid pipelines.
V250 Valve
Note
Neither Emerson, Emerson Process
Management, nor any of their affiliated
entities assumes responsibility for the
selection, use and maintenance of any
product. Responsibility for the
selection, use, and maintenance of any
product remains with the purchaser
and end-user.
Features
High Pressure Drop Capabilities—Depending
on the construction, a Design V250 valve is capable
of a maximum static pressure differential of 103 bar
(1500 psi) at 82°C (180°F) for CL600, and 155 bar
(2250 psi) for CL900 constructions at 38°C (100°F)
for LCC steel and CF8M (316 stainless steel).
Efficient Operation—Tapered-polygon
ball-to-shaft connection (see figure 5) and clamped
splined actuator connection (see figure 6) remove
lost motion or deadband from the drive train for
throttling control applications.
W4177 / IL
Figure 1. Design V250 Valve with Type 1061 Actuator
Tight Shutoff—Shutoff with the Design V250
ball seal is 0.0001 percent of maximum capacity.
Greater Capacities—Design V250 ball valve
construction offers greater capacities than
conventional globe valves for both compressible and
incompressible fluids.
Sour Service Capability—Materials are
available for applications handling sour service.
These materials comply with the requirements of
NACE MR0175-2002.
Long Service Life—Pressure-balanced drive
shaft design with PTFE-lined bearings and
pressure-assisted shaft sealing arrangement
provides for a long life of reliable service.
Minimum Maintenance—Two-piece ball and
shaft assembly allows for complete trim overhaul;
parts replacement is kept to a minimum.
Excellent Flow Control—Reduced ball port
design provides a modified equal percentage flow
characteristic and an excellent response
characteristic.
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Excellent Environmental Capabilities—The
optional live loaded packing system is designed with
very smooth shaft surfaces and live loading to
provide excellent sealing.
D100053X012
V250 Valve
Specifications
Product Bulletin
51.3:V250
November 2007
Available Configuration
Flangeless ball valve assembly with
flow ring, or dual ball seal
seal,
single ball
Valve Body Sizes and End Connection Styles
NPS 4 through 12 flangeless valves retained by
line flange bolts and designed to fit between
CL600 or CL900
raised-face or ring-type
joint flanges (ASME B16.5)
NPS 16 through 24 flangeless valves retained by
line flange bolts and designed to fit between
CL600
raised-face or ring-type joint flanges
(ASME B16.5)
Maximum Inlet Pressure
(1)
NPS 4 through 12 consistent with CL600 or
CL900 (ASME B16.34)
NPS 16 through 24 consistent with CL600
(ASME B16.34)
Maximum Allowable Shutoff Pressure Drop
(1,2)
Single-Seal and Dual-Seal Construction: See
figure 3.
Flow Ring Construction: Limited by the
pressure-temperature rating of the valve body
Flow Characteristic
Modified equal percentage
Flow Direction
Single Seal Construction: Forward-flow only
(see figure 4)
Flow Ring Construction: Forward- or
reverse-flow (see figure 4)
Dual Seal Construction: Required to provide
shutoff for bi-directional flow
Flow Coefficients
See the section titled Coefficients in this bulletin,
or see Catalog 12
Noise Levels
Shutoff Classification
Single-Seal and Dual-Seal Constructions:
0.0001% of maximum valve capacity (less than
1% of Class IV, ANSI/FCI 70-2 and IEC 60534-4)
Flow Ring Construction: 1% of maximum valve
capacity
Construction Materials
See table 1
Seal Material Temperature Capability
(1)
Single-Seal and Dual-Seal Construction:
–46 to 82°C (–50 to 180°F) for LCC steel and
CF8M [316 stainless steel (SST)] valve bodies
Flow Ring with Nitrile O-Rings:
(
–50 to 200°F) for LCC steel and CF8M valve
–46 to 93°C
bodies
Flow Ring with Fluorocarbon O-Rings:
to 204°C (
–50 to 400°F) for LCC steel and CF8M
–46
valve bodies
See Catalog 12 for sound pressure level
prediction
Maximum Ball Rotation
90 degrees
Actuator Mounting
Right-hand or left-hand mounted as viewed
from the valve inlet for forward-flow
Shaft and Bore Diameters
See figure 8
(continued)
2
Product Bulletin
51.3:V250
November 2007
Specifications (continued)
V250 Valve
Approximate Weights
See table 2
Options
Line flange bolts, Sour service trim
(3)
,
seal configuration for bi-directional shutoff (this
configuration incorporates a tapped and plugged
connection which can be used in a double block
and bleed system to test seal integrity),
Live
Loaded PTFE Packing
Buried service actuator adaptation, and Dual
1. The pressure or temperature limits in this bulletin and any applicable standard or code limitations should not be exceeded.
2. The maximum allowable shutoff pressure drops are further limited for the following constructions. The NPS 12 with S20910 drive shaft is limited to 128 bar (1862 psi) from –46 to 59°C (–50
to 139°F) and to 103 bar (1490 psi) at 93°C (200°F). The NPS 16 with 17-4PH steel, with 2-1/2 inch splined driveshaft is limited to 1000 psi (69 bar), and with the S20910, 2-1/2 inch splined
drive shaft is limited to 55 bar (795 psi) at all service temperatures. The NPS 24 with S20910 drive shaft is limited to 92 bar (1336 psi) at all service temperatures.
3. See table 1 for sour service trim materials.
OUTLET
BALL
SEAL
W7169-1 / IL
W7170-1 / IL
OUTLET SIDE OF VALVE BODY FOR
OPTIONAL DUAL SEAL CONSTRUCTION
VIEW A
SEAL DETAIL
FOLLOWER
SHAFT
W7169-1 / IL
VALVE
BODY
SEAL PROTECTOR
RING OR FLOW RING
BALL
MAIN SHAFT
BEARING
VALVE
INLET
INLET
BALL
SEAL
Figure 2. Sectional View of Design V250 Valve
SEAL
CARRIER
DRIVE SHAFT
SEE VIEW A
3