Data Sheet

Vee-Ball Valves
D101363X012
Product Bulletin
51.3:Vee-Ball
January 2015
3
Specifications (continued)
Standard Flow Direction
Forward (into the convex face of the V-notch ball)
Flow Coefficients
See Fisher Catalog 12
Flow Coefficient Ratio
(3)
See Fisher Catalog 12
Noise Levels
See Fisher Catalog 12
Maximum Ball Rotation
90 degrees
Actuator Mounting
Standard valve construction is for right-hand
mounting, as viewed from upstream end of valve.
Left-hand (optional) mounting is available upon
request.
Valve/Actuator Action
With diaphragm or piston rotary actuator, the valve is
field-reversible between PDTC or PDTO:
J push-down-to-close (extending actuator rod closes
valve) and
J push-down-to-open (extending actuator
rod opens valve)
Approximate Weight
See table 2
Options
J Pipe plug at end of follower shaft for all sizes,
J Line flange bolting, J Materials that are
compatible with sour service,
J Alloy construction
materials,
J ENVIRO-SEAL packing system: See figure
4 and Bulletin 59.3:041, ENVIRO
-SEAL Packing
Systems for Rotary Valves (D101638X012) for more
information,
J Micro-Notch construction for
NPS 1 valves (see Micro-Notch Construction section),
J S31254/CK3MCuN trim material
1. The pressure/temperature limits in this bulletin, and any applicable code or standard limitation, should not be exceeded.
2. Additional limits are shown in tables 5, 6 and 7.
3. Ratio of maximum flow coefficients to minimum usable flow coefficient can also be called rangeability.
4. For the CG8M and alloy 6 Micro-Notch constructions, pressure and temperature capabilities are the same as for standard constructions.
Features (continued)
n Application Versatility—The valves are available with
ISA S75.08.02 and IEC 534-3-2 face-to-face
dimensions as a standard construction, and
optional ASME B16.10 short face-to-face
dimensions. IEC 534.3.2 face-to-face dimensions are
equivalent to S75.08.02 face-to-face dimensions.
n Long Service Life—The solid HD metal seal (figures 1
and 2) construction provides long service life in
demanding applications. The constant wiping
action of the seal across the ball's sealing surface
prevents scale and sludge buildup, and provides
excellent service on steam, gases, slurries, and
various liquid applications.
n Smooth Valve Operation—Precision machined parts
and pressure balanced seal designs allow smooth,
precise movement of the ball.
n Excellent Flow Control—Precise contouring of the
Vee-Ball provides a modified equal percentage flow
characteristic. For very precise control of low flow
rates, the Micro-Notch option is available on the
NPS 1 valve. See the Micro-Notch Construction
section of this bulletin for more information.
n Sour Service Capability—Materials are available for
applications involving sour liquids and gases. These
constructions comply with NACE MR0175-2002,
MR0175-2003, MR0103, and MR0175/ISO 15156.
n Quick and Easy Maintenance—Ball seal inspection
and replacement is done at the valve body inlet
without removing the actuator or disassembling the
valve. Valve maintenance requires no special tools.
n Structural Integrity—One-piece valve body improves
structural integrity of the pressure boundary by
eliminating leak paths that could be caused by the
gaskets in two-piece, bolted valve designs.
n Exceptional Environmental Capabilities—The
optional ENVIRO-SEAL packing systems are
designed with very smooth shaft surfaces and live
loading to provide exceptional sealing. The seal of
the ENVIRO-SEAL system can restrict emissions to
less than the EPA (Environmental Protection
Agency) limit of 100 ppm (parts per million).