3-piece Stainless Ball Valve – A-T 55 Series Ball Valve – Manual Operation


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55 Series Stainless Steel 3-piece Ball Valve

  • High-Quality Construction: Investment cast body and ends ensure durability and longevity.
  • Versatile Sizing Options: Available in sizes ranging from 1/4″ to 4″, with threaded, socket weld, and butt weld ends.
  • Superior Leak Protection: Features a live-loaded packing system with Belleville washers and double “V” ring packing for enhanced leak protection.
  • Wide Range of Valve Cv: Offers various valve sizes with corresponding Cv values for optimal flow control.
  • Easy Automation: Designed for effortless automation, making it convenient for industrial applications.
  • Compliance with Standards: Fully conforms to ASME B16.34 design standards and other relevant standards for end connections, pressure testing, mounting, CE approval, material certification, and quality assurance.

TRIAC/A-T Controls: 55 Series Ball Valve – Technical Specifications

Full-Port Threaded, SW, BW
316 SS Body ASTM A351 CF8M Body
316 SS Ball/Stem
RTFE Seat/Seal Material
1/4″ to 1-1/2″ 1000 PSI Max Pressure
2″ to 2-1/2″ 800 PSI Max Pressure
3″ to 4″ 600 PSI Max Pressure

Installation and Maintenance Manual

Additional information

Weight N/A
Dimensions N/A
Connection Type

Buttweld, Female pipe thread

Pipe Size

1/4", 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3", 4"

Material - Seat & O-Rings

RTFE (Reinforced Teflon®: 85% PTFE, 15% Glass Fiber)


316L SS

Max Pressure (PSI)

800 psi, 1000 psi