Fisher 8532
Product Bulletin
8532 Valve
D101552X012
Fisherr 8532 High-Performance Butterfly
Valve
The Fisher 8532 high-performance butterfly valve
provides outstanding performance under extreme
pressure and temperature conditions. The 8532 valve
maintains tight shutoff, is available in a fire-tested
version, and can be specified for cryogenic
applications.
The 8532 valve is available as either a flangeless,
wafer-style design or as a single-flange (lugged)
design. A splined drive shaftcombineswithavarietyof
spring-and-diaphragm or pneumatic piston actuators
to make the 8532 a reliable, high-performance
butterfly valve for a variety of throttling and on-off
applications in the various process industries.
The8532valvecanbesuppliedwithoneofseveral
dynamic seals (figure 4) that can be used in a variety of
demanding applications. With the appropriate seal
selection and materials of construction, the
pressure-assisted seal provides excellent shutoff
against the full CL150 or CL300 pressure ratings.
Unless otherwise noted, all NACE references are to
NACE MR0175-2002.
W9138-2
Economically Designed for Minimal Deadband–A
splined end connection on the drive shaft allows
lever clamping by most Fisher rotary actuators.
Application Versatility–Standard construction
materials and seal assemblies provide long life and
outstanding performance in a broad range of liquid
and gas applications.
51.6:8532
April 2013
Features
Economical Tight Shutoff–The pressure-assisted
seal design provides tight shutoff against the full
pressure rating of the specified valve.
Safety–Shaft blowout protection is designed into
the8532valve(figure6).Theanti-blowout gland
fits securely over the valve shaft which has been
turned down to form a circumferential shoulder
that contacts the anti-blowout gland.
Excellent Flow Control–With a modified equal
percentage flow characteristic, the 8532 can be
used for throttling applications through 90 degrees
of disc rotation. Rangeability is 100 to 1.
Ease of Maintenance–Interchangeability of all parts
including shafts and discs simplifies service and
reduces maintenance costs.
Improved Environmental Capabilities– The optional
ENVIRO-SEALpackingsystemisdesignedwithvery
smooth stem surfaces and live-loading provides
improved sealing, guiding, and loading force
transmission. The ENVIRO-SEAL packing system can
control emissions below the EPA (Environmental
Protection Agency) limit of 100 ppm (parts per
million).
Easy Installation–The valve body self-centers on the
line flange bolts as a fast, accurate means of
centering the valve in the pipeline.
Reliable Flange Gasketing Surface–Seal retainer
screws are located so there is no interference with
the sealing function of either flat sheet or spiral
woundlineflangegaskets.
www.Fisher.com
Product Bulletin
51.6:8532
April 2013
Specifications
8532 Valve
D101552X012
Available Valve Configurations
J Flangeless, wafer-style or J single-flange (lugged)
controlvalvewithaone-piece valve body, a
two-component seal/backup O-ring, and a splined
drive shaft
Valve Body Sizes
NPS J 14, J 16, J 18, J 20, and J 24
End Connection Style
J Flangeless, wafer-style or J single flange valve
body designed to fit between raised-face mating
flanges per ASME B16.5 CL150 or CL300
Maximum Inlet Pressure/Temperature
(1)
Consistent with J CL150 and J CL300
pressure/temperature ratings per ASME B16.34. Also,
see figures 2 and 3 for additional information
Available Seal Configurations
Standard Constructions
Seefigure4andtable2
Standard Construction Materials
Valve Body and Disc: ASTM grades of J carbon steel
or J stainless steel
Disc Coating:
Hardcoating (also see table 2): J Standard when used
with NOVEX seal, J Phoenix III seal, or J Cryogenic
seal
Chromium Carbide: Standard when service
temperature exceeds 538_C (1000_F)
Shaft: ASTM grade of J S17400 (17-4PH H1025 SST),
J S17400 (17-4PH H1150M SST), or J S20910
Shaft Extension Lengths:
High Temperature J None required for temperatures
less than 343_C(650_F),
J 6 inches for temperatures from 343 to 538_C(650
to 1000_F), or J 12 inches for temperatures above
538_C (1000_F)
Cryogenic J 914mm (36 inches)
Seal Ring: J PTFE, J S31600 (316 SST), J S21800,
J S31600/PTFE, J UHMWPE
(4)
,orJ CTFE
(5).
Backup ring: J Nitrile, J Chloroprene, J PTFE,
J Fluorocarbon--for a broad range of hydrocarbon
and chemical process applications
process applications including steam and water
(1)
or J EPR--for
(1)
backup ring is not used with the NOVEX seal
Packing: J PTFE V-ring (standard packing),
J Graphite (optional), or J ENVIRO-SEALt
packing (optional)
Bearings: J PEEK
.
(2)
(standard material), and
J S31600, J PTFE Composition, or J CoCr-A(Alloy
6) (optional)
Valve Body Classification
Face-to-face dimensions are in compliance with MSS
SP68 and API 609 standards; valve bodies are
designed for installation between ASME B16.5 CL150
or CL300 raised-face flanges
Shutoff Classification. Per ANSI/FCI 70-2and
IEC 60534-4
Standard Soft Seal: Bidirectional bubble-tight shutoff
NOVEX Seal: Unidirectional shutoff
1% of Class IV (preferred flow direction only
(3)
),
optional Class VI
Phoenix III Seal: Bidirectional bubble-tight
Phoenix III Seal for Fire Tested Applications: Class VI
shutoff. Contact your Emerson Process Management
sales office for more information.
Flow Characteristic
Modified equal percentage
Flow Coefficients
See table 1 and Fisher Catalog 12
Noise Levels
See Catalog 12 for sound pressure level prediction
Available Actuators
J Spring-and-diaphragm, or J pneumatic piston
.A
(continued)
2
8532 Valve
D101552X012
Specifications (continued)
Product Bulletin
51.6:8532
April 2013
Disc Rotation
Clockwise to close
ENVIRO-SEAL Packing
This optional
J PTFE or J graphite packing system
provides improved sealing, guiding, and transmission
Valve Dimensions and Approximate Weights
See figures 7, 8, 9 and 10
1. The pressure/temperature limits in this bulletin (figures 2 and 3), and any application code or standardlimitation, should not be exceeded.
2. PEEK stands for poly-ether-ether-ketone.
3. For optimumseal performance, thepreferred valve orientationat shutoff is with the retaining ring downstream from the high pressure side of the valve.
4. UHMWPE standsfor ultra highmolecular weight polyethylene.
5. CTFE not recommended for fast cycling, less than 2 seconds.Contact your Emerson Process Management sales office for other seals available for fast cycling or tighter shutoff.
of loading force to control liquid and gas emissions.
See Bulletin 59.3:041 ENVIRO-SEAL Packing Systems
for Rotary Valves for more information.
Figure 1. Flow Direction
REVERSE
FLOW (NORMAL FLOW DIRECTION)
FORWARD
FLOW
A7092
Table 1. Flow Coefficients
VALVE SIZE,
NPS
14
16
18
20
24
1. To obtain the flow coefficient Kvin terms of cubic meters per hour at one kilogram
force per square centimeter differential pressure across the valve, usingthe following
multiplier: K
2. Measured in gallons per minutes at 1 psi differential pressure across the valve.
3. See the section titled Coefficients in this bulletin, and also Catalog 12 for a
complete listing of flow coefficients.
=0.856Cv.
v
FACE SIDE OF DISC
(1)(3)
(2)
MAX C
CL150 CL300
6320
8600
11,050
13,850
21,500
, VALVE 90_ OPEN
v
4550
5630
8230
9530
12,510
Installation
Recommended installation for the 8532 valve is with
the shaft horizontal in a normal-flow direction.
Horizontal installation will enhance valve performance
because process fluid flow will sweep entrained solids
from valve surfaces. This sweeping action prevents
particle buildup on seal surfaces. However, the valve
may be installed in either the forward or reverse flow
direction.
The standard soft seal offers bubble-tight, bidirectional
shutoff. To meet the performance requirements of
many of today's fire-tested requirements, a Phoenix III
valvemustbeinstalledinthepreferredvalve
orientation. Both the NOVEX and cryogenic seals are
uni-directional and should be installed with the shaft
upstream of the seal.
Unique operating conditions may require a specific
combination of actuator motion. To satisfy unique
operating requirements, the valve and actuator can be
assembled in eight ways, providing for actuator
motion and open disc position. For assistance in
selecting the appropriate combination of actuator
action and open valve position, consult your Emerson
Process Management sales office.
Dimensions and weights for wafer-style and
single-flange valves are shown in figures 7, 8, 9 and 10.
3
Product Bulletin
51.6:8532
April 2013
Figure 2. Maximum Pressure/Temperature Ratings for Soft Seal, NOVEX Seal and Phoenix III Seal, CL150 and CL300
8532 Valve
D101552X012
CL150 SOFT SEAL
CL150 NOVEX SEAL
CL300 SOFT SEAL
CL300 NOVEX SEAL
CL150 PHOENIX II SEAL
C0759-1
Note
1
Becauseof potential erosive effects andpremature seal failure thatcan occur, throttling PTFE seals at differential pressures greater than 300 psidat diskangleslessthan
20 degrees open is not recommended.
2
Temperature limitations do not account forthe additional limitations imposed by thebackup O-ring usedwith this seal. Todetermine theeffective temperature limita
tion of the appropriate seal backup O-ring combination, refer to table 1.
4
CL300 PHOENIX II SEAL
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