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Thermoplastic Valves Product Guide & Engineering Specifictions
Wafer Butterfly Valves
Page 781 Suitable for Oil-Free air handling to 25 psi, not for distribution of compressed air or gas Spears
®
Manufacturing Company
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Features - PVC, CPVC
Spears
®
Wafer ButterÀ y Valve is a multi-featured design
incorporating laying lengths that allow direct replacement
of common Cast Iron valves such as Keystone Model 228
and Bray Series 30 ButterÀ y Valves. Wafer Valves feature
b
uilt–in Santoprene™ Thermoplastic Elastomer (TPE)
À ange gaskets, easy operating disc-mounted seat, and fully
isolated stem design. Available in sizes 2" through 12",
with choice of Buna-N, EPDM or FKM Seats on PVC
Valves, EPDM or FKM on CPVC Valves.
•
Chemical & Corrosion Resistant PVC or CPVC Construction
• Special Designed Laying Lengths for Direct Replace-
ment of Common Cast Iron ButterÀ y Valves
• Built-in Santoprene™ Thermoplastic Elastomer (TPE)
Gaskets on Valve Flange Faces
• Easy Operating Disc Mounted Seat in Choice of Buna-N,
EPDM, or FKM
• Fully Isolated (Dry) Solid Type 316L Stainless Steel Stem
• Reversible High Impact Polypropylene Lever Handle
with 7-Position Stops and Built-in Lockout Capability
• Optional High Efficiency Gear Operator with Cast
Aluminum Housing, Polypropylene Handwheel and
Built-in Position Indicator
• Compatible with ANSI/ASME B16.5 Class 150 Bolt
Pattern Flanges
• Pressure Rated to 150 psi for water @ 73°F (23°C)
Sample Engineering Specification
All thermoplastic valves shall be Wafer ButterÀ y
type constructed from PVC Type I Cell Classi¿ cation
12454 or CPVC Type IV Cell Classi¿ cation 23447.
All valve seats and O-rings shall be Buna-N, EPDM
or FKM. Seat shall be a non-liner type mounted to
the valve disc. All valves shall have built-in Santo-
p
rene™ Thermoplastic Elastomer (TFE) À ange gas-
kets. Wafer style valves shall be for mounting between
two À anges having bolt hole pattern that conform to
ANSI/ASME B16.5 CL 150. Disc shall be centered
with Type 316L Stainless Steel Stem. Stem shall be
isolated from the process medium for dry opera-
tion. Lever operated valves shall be equipped with
high impact polypropylene handle having 7-position
stops and built-in lockout capability. Gear operated
valves shall be equipped with position indicator and
high impact polypropylene handwheel. Valves shall
b
e pressure rated at 150 psi for water at 73°F, as
manufactured by Spears
®
Manufacturing Company.
PVC Quick-View Valve Selection Chart
Valve
Size
O-ring
Material
STANDARD VALVE DESIGN
Pressure
Rating
PVC Part Number
1
w/Lever
Handle
w/Gear
Operator
Valve
Only
2
Buna-N 751311-020 751321-020 751301-020
150 psi
Non-Shock
Water
@ 73°F
EPDM 752311-020 752321-020 752301-020
FKM 753311-020 753321-020 753301-020
2-1/2
Buna-N 751311-025 751321-025 751301-020
EPDM 752311-025 752321-025 752301-025
FKM 753311-025 753321-025 753301-025
3
Buna-N 751311-030 751321-030 751301-030
EPDM 752311-030 752321-030 752301-030
FKM 753311-030 753321-030 753301-030
4
Buna-N 751311-040 751321-040 751301-040
EPDM 752311-040 752321-040 752301-040
FKM 753311-040 753321-040 753301-040
6
Buna-N 751311-060 751321-060 751301-060
EPDM 752311-060 752321-060 752301-060
FKM 753311-060 753321-060 753301-060
8
Buna-N 751311-080 751321-080 751301-080
EPDM 752311-080 752321-080 752301-080
FKM 753311-080 753321-080 753301-080
10
Buna-N 751311-100 751321-100 751301-100
EPDM 752311-100 752321-100 752301-100
FKM 753311-100 753321-100 753301-100
12
Buna-N 751311-120 751321-120 751301-120
EPDM 752311-120 752321-120 752301-120
FKM 753311-120 753321-120 753301-120
1: For CPVC EPDM & FKM valves, add the letter “C” to part numbers listed (e.g., 752311-030C).
General Installation Information
Spears
®
Wafer Butterfly Valves are designed for system connections
between two flanges having ANSI B16.5 Class 150 bolt hole
patterns. The valve handle (or gear operator) is reversible 180°for
either left or right side operation. Wafer Butterfly Valves have built-
in flange gaskets and are designed for installation with user supplied
hex bolts, nuts and flat washers. The valve must be positioned with
gasket areas evenly located between mating flange sealing surfaces.
Valve Bolt Specification bolt lengths in table below are minimums
based on use of two (2) Spears
®
flanges, Valve with built-in gaskets,
standard S.A.E. hex bolts and Standard Plate “W” Series flat
washers.
Caution: Spears
®
Wafer Butterfly Valves are designed for use with
flanges or flanged equipment having minimum waterway inside
diameter no less than that of Schedule 80 PVC pipe (ASTM D
1785). Use of smaller inside diameter flange connections may
result in obstruction and damage to the valve disc and seat.