Trunnion (welded ball valve)

The ball is supported by a lower Trunnion and the body completely welded.


1. Length of stem: the welded ball valve can be manufactured with an extended stem to permit underground installations in remote or inaccessible areas
2. Fire-safe, anti-static device and anti blow-out stem
3. Up-stream sealing
4. Self-relieving seat system
5. Double block and bleed function
6. Emergency sealing injection system
7. Extended stem for cryogenics service


Size: 2″-48″
Pressure: 150 – 2500LB
Material: A105N, A350 LF2, A182 F304, A182 F316 or other alloys.
Design and production standard: API 6D, API 608, ASME B16.34
Distance between flanges: API 6D, ASME B 16.10
Flange connection: ANSI B 16.5
Test standard: API 598, API 6D
Structure: welded forged body (subject to ultrasound inspection according to ASME), welds subjected to penetrating liquids.
Actuation: can operate with lever, gearbox, pneumatic or electric actuator with handwheel for emergencies.
Medium: the valve is suitable for several media including water, steam, oil, gas, petrol products, nitric acid, acetic acid, etc.
Working temperature: from -196ºC (cryogenics service), -46ºC or -50ºC (stainless steel constructions) and -29ºC (carbon steel constructions) up to 220℃

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