3-Piece Threaded Ball Valve

Threaded connection DIN 299950228.1507 - 1 ASMEB120.1BS21BS2779

Technical Parameters:

Temperature range: - 20°C ~ * 180°C

Working pressure: DN08 - DN50 PN63

DN65-DN100 PN40

3-Piece Ball Valve - Swing-Out Maintenance Design

3-piece threaded ball valve with swing-out centre section for quick inline maintenance. 304/316L stainless steel, PTFE seats, 1000 PSI WOG, BSP or NPT threads.

Model reference: 3-Piece Threaded Ball Valve · size range DN8-DN50 · connection BSP / NPT / BSPT.

Key features

• Centre section swings out on the threaded version in minutes
• Lever, oval handle or bare stem configurations
• Three-piece body: centre section swings out for inline seat replacement
• Four-bolt clamp design, no pipe movement required during service
• Precision-machined ball, mirror-polished to Ra 0.4 µm on request
• PTFE / RPTFE seats and graphite packing for high-cycle duty
• Fully repairable — every wear part is available as a spare

Typical applications

• Lines where maintenance windows are short
• Pharmaceutical and biotech process skids
• Food and dairy process piping
• Steam and thermal-oil circuits
• Test benches and pilot plants

Materials and standards

Body: CF8M / 316L; ends: threaded, flanged, welded or clamp; seats: PTFE, RPTFE or TFM; packing: PTFE / graphite; pressure 1000 PSI (PN63); temperature -29 °C to +230 °C depending on seat material; testing per API 598. All wetted parts are traceable to EN 10204 3.1 mill certificates, and each valve is pressure-tested before packing.

Frequently asked questions

How long does an inline seat change take?
With the line isolated and drained, a trained technician replaces seats and seals in roughly 15-20 minutes without cutting or re-welding the pipe.

Which seat material for steam service?
Choose RPTFE or TFM for continuous steam up to 200 °C, or graphite packing with metal-seated variants above that.

Browse all ball valves · ball valve maintenance procedure