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Three-Piece Ball Valve 1
Ball Valves

Three-Piece Ball Valve

Price:Quoted by size, pressure rating, body material and configuration
  • Size rangeDN8 – DN80 (1/4″ – 3″)
  • Pressure classASME Class 800 / PN 63 (threaded type)
  • Body materialCF8M (316 stainless steel)
  • Ball / stem316 stainless steel
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Three-piece ball valves consist of a central body and two end connectors clamped together by long bolts. Removing the centre section gives access to the ball and seats, so internal parts can be serviced or replaced without dismantling the pipeline — the most maintenance-friendly ball valve configuration. The body is usually investment-cast or bar-stock stainless steel, with threaded or butt-weld ends, a full bore and PTFE soft seats. The top of the body carries an ISO 5211 mounting pad for direct mounting of pneumatic or electric actuators for automated control.

Features

· Three-piece construction allows in-line servicing and replacement of ball and seats · Full-bore design with low flow resistance · Threaded (NPT/BSP) or butt-weld ends available · ISO 5211 top mounting pad for actuator installation · Soft-seat zero leakage with PTFE/RPTFE seats · CF8M stainless steel body for corrosion resistance

Technical Specifications

Size range
DN8 – DN80 (1/4″ – 3″)
Pressure class
ASME Class 800 / PN 63 (threaded type)
Body material
CF8M (316 stainless steel)
Ball / stem
316 stainless steel
Seat
PTFE / RPTFE
End connection
NPT / BSP thread / butt weld
Temperature range
−29 ~ +180 °C (soft seat)
Design standard
ASME B16.34 / MSS SP-110
Actuator interface
ISO 5211 mounting pad
Operation
Lever / pneumatic / electric

Applications

For media shutoff in instrument lines, fine chemicals, food and pharmaceutical service and small-bore high-pressure piping, particularly where frequent inspection and renewal of internal parts are required.

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