` Heksagon - Delivering Engineered Solutions Globally

Delivering Engineered Solutions Globally



PVC BUTTERFLY VALVE

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 Viton®. 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, as manufactured by Spears® Manufacturing Company.

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" - 12" in Standard or 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 Viton® 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

  • Teflon® 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


PP BUTTERFLY VALVE

Sample Engineering Specification

All thermoplastic valves shall be Butterfly type constructed from Polypropylene, ASTM D 4101. All valve seats and O-rings shall be Buna-N, EPDM or Viton®. Seat shall be a non-liner type interlocked to valve body. Bolt hole pattern 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. Valves shall be pressure rated at [see table] for water at 73° F, as manufactured by Spears® Manufacturing Company.

Spears® patented Butterfly Valve design departs from traditional liner-seat type valve to eliminate seat creep, reduce operating torque and provide positive seal-off. Broad range of chemical resistance makes Polypropylene well suited for industrial and chemical processing applications. Designed for flow control or throttling, this high-performance valve is offered with a full variety of options for greater application versatility. Available in IPS sizes 1-1/2" - 24" with custom produced 30" to 60" valves available.


  • UV Stabilized Polypropylene Construction
  • 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 Viton® Seat & Seals
  • Solid Type 316L Stainless Steel Stem, fully isolated from process fluids
  • 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)
  • Pressure ratings include Dead-End Service (See Chart).
  • ANSI/ASME B16.5 Class 150 Bolt Pattern


Optional Accessories

  • Teflon® Coated Stem
  • Stem Extension Kit
  • PTFE Seat Sleeve (through 12" size)
  • Lever Handle Kit (standard on 1-1/2" - 8" valves)
  • Gear Operator Kit (standard on 10" & larger valves)
  • T-Handle Kit
  • 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


General Installation Information

Spears® Butterfly Valves are designed for system connections either between two flanges, or with single-side (flange one-side only) connection for dead-end service using lug style valves. Lug Insert Valves require attention to flow direction, True Lug valves may be installed either direction. The valve handle (or gear operator) is reversible 180° for either left or right side operation. Spears® Butterfly Valves are designed for installation with user supplied 1/8" full-faced gaskets, hex bolts, nuts and flat washers.

Caution:
Spears® 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.



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PT Heksagon Tiwikrama

Rukan Sunter Paradise Tahap II,
Blok A5 No.57
Jl. Bisma Raya, Sunter Agung
Jakarta 14350 - Indonesia

Telp. 021 – 6412817-20
Fax. 021 – 65308579
Email : sales@heksagon.co.id