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Thermoplastic Valves Product Guide & Engineering Specifictions
Butterfly Valves - Standard, Lug Insert & True-Lug Styles
Page 783 Suitable for Oil-Free air handling to 25 psi, not for distribution of compressed air or gas Spears
®
Manufacturing Company
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Sample Engineering Specification
All thermoplastic valves shall be Butterfly type constructed
from PVC Type I Cell Classification 12454 or CPVC
Type IV Cell Classification 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 B16.5 Class 150.
Disc shall be offset design with fully isolated Type 316L
stainless steel stem and Type 316 stainless steel hardware.
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. Valve
bodies shall accept field installable lug inserts or shall be
factory installed lug inserts, or be 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 through 12", as
manufactured by Spears
®
Manufacturing Company.
Features - PVC, CPVC
Spears
®
patented Butterfly Valve design departs from
traditional liner-seat type valve to eliminate seat creep, reduce
operating torque and provide positive seal-off. Ideally suited
for flow control or throttling, this high-performance valve is
offered with a full variety of options for greater application
versatility in industrial and chemical processing applications.
Available in IPS sizes 1-1/2" - 14" in Standard or 1-1/2" - 12"
True Lug (factory installed lugs) style.
•
Special off-set Disc lifts quickly from seat to reduce wear and
reduce operating torque.
• Patented Limited Contact Seat design provides free travel -
eliminates seat creep, extrusion and wear. Field replaceable
without full valve disassembly.
• Interlocking Body & Seat prevents wash-out or blow-out.
• Buna-N, EPDM or FKM Seat & Seals
• Fully Isolated Solid Type 316L Stainless Steel Stem
• Reversible High Impact Polypropylene Lever Handle with
7-Position stops & Built-in Lockout (standard handle on
1-1/2" - 8" valves; not available on 10" & larger valves)
• High Efficiency Gear Operator with Cast Aluminum Housing,
Polypropylene Handwheel, and Built-in Position Indicator
(available for all sizes; standard on 10" & larger valves)
• Lug Insert Style valve has factory installed SS316 or zinc
plated steel lug inserts.
• Standard valve accepts field-installable Lug Inserts Set
option
• True Lug design has factory installed zinc plated or SS 316
lugs and is specially designed for connection to either side
of valve.
• Pressure Rated to 150 psi @ 73°F including Dead-End
Service.
• ANSI/ASME B16.5 Class 150 Bolt Pattern
• Valves with EPDM Seals & Seats are NSF
®
Certified for
Potable water use.
Optional Accessories
• PTFE Coated Stem
• Stem Extension Kit
• PTFE Seat Sleeve
• Lever Handle Kit (standard on 1-1/2" - 8" valves)
• Gear Operator Kit (standard on 10" & larger valves)
• T-Handle Kit
• Field Installable Lug Insert Sets (for Standard valve)
• Speed Handle (for gear operated valves)
• 2" Square/T-Style Operator Nut (for gear operated valves)
• Chainwheel Operator Kit (for gear operated valves)
• Positive Stem Stop (for gear operated valves)
• Submersible Gear Operators
* See “BUTTERFLY VALVE ACCESSORIES” section for details of individual products.
Standard & True Lug Design
Gear Operating
Lever Handle
True Lug
Lug Insert Style
14" Standard
PVC & CPVC
Butterfly Valves