POLYPROPYLENE SCHEDULE 80 SR THREADED FITTINGS
• Wide Range of Threaded Configurations – IPS Sizes 1/2” Through 2” Spears offers a wide assortment of Schedule 80 SR threaded Polypropylene fittings, including:
Polypropylene Threaded Pipe Nipples
Polypropylene Unions w/EPDM Seals
Polypropylene True Union Ball Valves
Polypropylene Diaphragm Valves
Polypropylene Butterfly Valves
Wide Selection of Configurations
High Grade Natural or Black
Featuring Spears Special Reinforced (SR) Th read
Full 150 psi Pressure Rating at 73°F
180°F Maximum Service Temperature
Patented Special Reinforced (SR) Thread Design
Spears patented Special Reinforced (SR) thread design is one of the most significant advancements in theuse of plastic threaded fittings. More than just an added metal ring, this unique precompression design compensates for expansion forces generated from tapered pipe thread joint make-up. Radial stress is reduced in normal installations and contained in severe over tightening situations. SR style fittings use type 316 Stainless Steel reinforcement.
• Full 150 psi Pressure Rating For Threaded Systems Using SR Threaded Fittings Spears SR threaded Schedule 80 Polypropylene fittings provide the reinforcement necessary to provide threaded systems with full 150 psi pressure rating for water @ 73°F, typically found only in fusion welded systems.
• High Grade Homopolymer Compound - Excellent Chemical Resistance Spears selection of a premium polypropylene homopolymer provides improved purity with excellent chemical resistance to many solvents, caustic solutions and mixed chemicals for a wide variety of applications. Available in natural or black materials.
Improved Pressure Handling Performance
Due to the highly ductile nature of Polypropylene, most threaded PP fittings are rated for system pressures of 25 psi @ 73° F. Pressure applications of up to 150 psi generally require more costly fusion weld jointing methods or use of a glass-filled material which limits chemical resistance for some applications. Spears Special Reinforced (SR) thread design boosts threaded PP fitting performance by containment of expansion forces generated both during threaded joint make-up and higher system pressure operation. Laboratory test assemblies of Spears Schedule 80 SR Polypropylene threaded fittings have been subjected to ASTM D 1598 sustained pressure test for 1000 hours at 320 psi without failure or loss of joint integrity.
