1. Bellows sealed wedge cast steel gate valve adopts metal bellows to fully enclose the stem, eliminating external leakage risk at the stem packing and achieving low-emission sealing.
2. The valve is designed in compliance with API 600, ASME B16.34 and TA-LUFT low-emission standards, suitable for toxic, hazardous and volatile media.
3. Flexible wedge provides reliable sealing performance. Bidirectional medium flow is available without flow direction restriction, featuring no flow disturbance and low pressure loss during operation.
4. Materials for body, wedge and bellows can be selected according to corrosion and temperature conditions of working conditions.
5. Applied in chemical, pharmaceutical and coal chemical plants to prevent outward leakage of toxic and hazardous media from stem packing.
1. Wedge gate sealing pair delivers stable sealing performance in closed position.
2. Metal bellows isolates medium from packing, substantially eliminating packing external leakage and meeting low-emission requirements.
3. Bellows is verified for fatigue life to resist cyclic deformation during repeated opening and closing for safe operation.
4. Backup packing seal is equipped as secondary safety protection to provide protection in case of bellows damage.
5. The stem has no contact with external medium, resulting in zero fugitive emission pollution to protect the environment and operators.
6. Full bore flow path ensures low flow resistance.