Series 500-522 Butterfly Valves
Sizes 2"-12"

The superior resilient-seated butterfly valve for industry on the market today.

• Stem is machined from 17-4 stainless steel to eliminate twisting
• Top plate is machined to standardized drilling pattern allowing manual handle kits, and actuation, interchangeability also available in ISO patterns
• Stem brushing composed of full strength, corrosion resistant ertalyte – absorb operator side thrust
• A third stem seal ensures absolute seal externally or internally for vacuum or pressure service
• Two patented O-seals give a sure secondary seal as the O-seal becomes part of the body and encircles the stem before entering the seat and disc area
• Seats feature EPDM, Viton® and Sure Seal's special abrasion resistant formulated blend of FDA approved Nitrile and 12 other standard compounds
• Hub and seat seals prevent product from attacking stem or body
• Lug-style body has drilled and tapped lugs which meet ANSI 125 and 150 flange standards
• Sure Lock disc screw assembly manufactured from 316 stainless steel - disc is machined to precision tolerance, allowing Sure Lock to be recessed in the face of the disc for extra locking ability
• Flange seal provides an absolute seal to all flanges within specifications
• Precision machined and hand polished disc for positive seal with contoured edges for lower operating torque