Welded Ball Valves - Factory Direct

Technical Parameters:

Temperature range: - 20°C ~ + 180°C

Vacuum: 10 - 1 Torr

Working pressure: PN40

Welded Ball Valve - Leak-Free Pipeline Construction

Fully welded ball valves supplied direct from the StarryValve factory. DN15-DN300, PN16-PN40, stainless or carbon steel, maintenance-free design for heat networks.

Model reference: Welded Ball Valves - Factory Direct · size range DN15-DN300 · connection Butt-weld / flange.

Key features

• Factory-direct pricing without distributor margin
• PN16-PN40 body with optional gear operator
• Butt-weld or socket-weld ends eliminate flange joints and leak paths
• Extended stem option for buried and insulated pipelines
• Fully welded body rated for district heating and high-pressure service
• Self-relieving seat design prevents cavity over-pressure
• Available with gear operator, actuator pad or extended bonnet

Typical applications

• District heating and cooling mains
• Natural gas and fuel-gas pipelines
• Buried water and utility networks
• Geothermal and heat-pump loops
• High-pressure process and hydraulic lines

Materials and standards

Body: forged or cast 304/316L, carbon steel option; ends: butt-weld to ASME B16.25 or socket-weld; pressure PN16-PN40 (up to PN63 on request); temperature -20 °C to +200 °C; stem extension 100-500 mm for insulated pipe; testing per API 598 and EN 12266-1. All wetted parts are traceable to EN 10204 3.1 mill certificates, and each valve is pressure-tested before packing.

Frequently asked questions

Can the valve be welded into the line on site?
Yes, but weld heat must be controlled: keep the body below 150 °C, use wet cloths or heat sinks, and weld in short passes to protect the PTFE seats.

Do you supply extended stems for insulated pipe?
We manufacture extended-stem versions from 100 mm to 500 mm so the handle or actuator stays outside the insulation layer.

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