Delta-T Series 050 Wafer Style Ductile Iron Body
2" - 12"

The Products Series 050/051 and 650/651 resilient seated butterfly valves are designed for use in ASME Class 150 piping systems and are available in wafer and lug configurations. The standard size ranges for these series is as follows: 050/051 Wafer: 1-1/2 - 24” and Lug: 2” - 24”, 650-651 Wafer: 2” - 24” and Lug: 2” - 24”. Additional sizes thru 48” are available in Series 050/051, as well as double flanged versions.

Delta-T resilient-seated butterfly valves are used widely throughout the fluid flow industry because they are versatile, easy to automate, and cost effective. They are quick to install and can provide bidirectional shutoff with only quarter-turn actuation, or even operate as modulating valves. However, the functionality of a butterfly valve is greatly dependent on the seat, which typically provides the seal between the pipe flanges and for the valve disc.

The booted or dovetail style uses a geometric “dovetail” shape to mechanically mate with the inner diameter of the valve body. Because the fit is not physically bonded, the seat is easily removable but is prone to movement or deformation when mounting between flanges. The molded style seat is bonded directly to the body of the valve through an injection molding process. The elastomer is typically applied to the inner diameter of the cast valve body without prior machining, allowing normal variations from the casting process to affect the dimensional uniformity of the seat. The cartridge style seat improves upon the molded style by making the seat replaceable and with better manufacturing tolerances. A layer of elastomer is compression molded onto a rigid phenolic backing ring, which supports the elastomer in multiple directions. The compression molding process is the most consistent method available, providing constant pressure to form the seat shape and therefore maintaining tighter control of the seat dimensions.

Features and Benefits:

• Sizes 1 1/2” - 48” wafer
• 200 PSI max pressure rating
• PTFE seats max rated pressure to 150 PSI
• Install between Standard ANSI class 125/150 flanges
• ISO 5211 square drive shaft for easy automation
• Conforms to MSS-SP-67, MSS-SP-25, API–609
• Designed for blowout-proof service
• High-Cv slim disc and 2-piece stem design 2”-12”
• Field repairable
• Vacuum service capable 2” thru 12” to 10 microns
• CRN registration

Standards:

• Valves designed to API-609, MSS-SP-67, SM-SP-25
• Install between standard ANSI Class 125/150 Flanges

Multiple Configurations Available:
Contact a Sales Representative for inquires at 1-800-849-3030