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.

www.Fisher.com

 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