Brochure

Thermoplastic Valves Product Guide & Engineering Specifictions
Butterfly Valves Overview
Page 779 Suitable for Oil-Free air handling to 25 psi, not for distribution of compressed air or gas Spears
®
Manufacturing Company
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Innovation, Versatility & High Performance Technology
Special Offset Disc
Lifts quickly from single contact sealing surface to reduce seat wear and
lower operating torque, with bubble-tight seal off. Suitable for vacuum
service.
Limited Contact Interference Seat Design
Sealing contact between disc and seat takes place only at close of valve,
allowing free travel through full range of valve opening. Eliminates seat
creep, extrusion and wear typical with conventional liner-type seats.
Exclusive design interlocks seat and body to prevent wash-out or blow-
out.
Field Replaceable Seat — Choice of Buna-N,
FKM, or NSF
®
Certi¿ ed EPDM
Replace seat without full valve disassembly using convenient Seat & Seal
Carrier Replacement Kit or Full Valve Overhaul Kit. Choice of Buna-N,
EPDM or FKM seats and seals. EPDM valves are NSF
®
Certi¿ ed for use
with potable water.
Solid, Chemical & Corrosion Resistant
316 Stainless Steel Stem — Fully Isolated
Heavy blow-out proof 316 stainless steel stem is standard on all valves.
Fully isolated (dry stem) eliminates contact with process À uid.
Rugged PVC or CPVC Body & Disc
Computer engineered design places strength where needed most. PVC or
high temperature handling CPVC materials provide exceptional chemical
and corrosion resistance. Integrally molded actuation mounting pad and
lug receptacles for ¿ eld installable lug sets.
Full 150 psi Pressure Rating
Pressure rated to a maximum internal pressure of 150 psi at 73°F —
including Dead-End Service.
Sample Engineering SpeciÀ cation
All thermoplastic valves shall be Butterfly 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 interlocked to valve body. Bolt hole patterns shall conform to ANSI/ASME B-16.5 CL 150. Disc shall be offset
design with Type 316 stainless steel stem. Lever operated valves shall be equipped with high impact polypropylene
handle having built-in lockout capability. Gear operated valves shall be equipped with position indicator and high impact
polypropylene handwheel. Valves through size 12" shall accept ¿ eld installable lug inserts or shall be factory installed
True Lug type. Lugs shall be stainless steel or zinc plated steel. Valves shall be pressure rated at 150 psi for water at
73°F, as manufactured by Spears
®
Manufacturing Company.
Spears
®
innovative design depar ts from traditional
liner-seat t ype valves to eliminate seat creep, reduce
operating torque and provide positive seal o . Ideally
suited for  ow con trol or throttlin g, this high perform-
ance valve is offere d with a full variety of options for
greater app li c at i on versatil ity. Sta n dard valves are
produced from PVC or high te mper ature CPVC in IPS
sizes 1-1/2" through 14". PVC and CPVC True Lug valves
are produced in sizes 1-1/2" through 12".
Low Pro¿ le Cast Aluminum Gear Operator
Standard on 10" and larger sizes, utilizes high ef¿ ciency worm
gear drive, with high impact polypropylene handwheel and built-in
position indicator. Available as an option on smaller valves. Special
order gear operators available for a variety of submersible and other
environmental applications.
Field Installable Lug Inserts or Factory
Installed True Lug Valves (Sizes 1-1/2" - 12")
Standard valve body accepts optional ¿ eld installable lug insert
sets for easy single-sided installation and system add-on. True Lug
valve comes with factory installed lugs for total versatility, including
disconnection from either side while under pressure. Both styles
suitable for full pressure dead-end service. Choice of stainless or zinc
plated steel lugs.
Exclusive Factory Reconditioning Program
Spears
®
will factory recondition originally purchased ButterÀ y Valve
to full working order — regardless of condition. Contact Spears
®
Technical Services Department for details and pricing.
High Impact Polypropylene Lever Handle
Standard on 1-1/2" through 8" sizes, provides quick selection from
any one of seven stop positions, with built-in lockout capability.
Reversible 180° for either right or left side operation.
Polypropylene & PTFE Lined Valves
High performance ButterÀ y Valves are available in Polypropylene
1-1/2" through 60". See publication PPBFV-2 for additional details.
Plus, unique PTFE lined valve design custom manufactured for
high purity systems. Contact Spears
®
Technical Services for
additional information.