Bellow Seal Gate Valve

Bellow Seal Gate Valve

As a professional high quality Bellow Seal Gate Valve manufacture, you can rest assured to buy Bellow Seal Gate Valve from our factory and we will offer you the best after-sale service and timely delivery.

The opening and closing parts of the bellows gate valve are plug-shaped valve flaps with a flat or tapered sealing surface, and the valve flaps move in a straight line along the centerline of the fluid. The movement of the valve stem in the form of lift rod type (stem lift, handwheel does not lift), there are also lift rotary rod type (handwheel and stem together with the rotation of lift, the nut is located on the valve body). Ripple shut-off valve is only suitable for full opening and full closing, not allowed for regulation and throttling. This type of valve in the pipeline should generally be installed horizontally.

Bellows gate valve belongs to the forced sealing type valve, so when the valve is closed, pressure must be applied to the valve flap to force the sealing surface not to leak. When the medium enters the valve body from below the valve flap, the resistance that the operating force needs to overcome is the frictional force of the stem and packing with the thrust generated by the pressure of the medium, the force of closing the valve is greater than the force of opening the valve, so the diameter of the stem should be large, otherwise the failure of the stem top bend will occur.In recent years, from the emergence of self-sealing valves, the media flow direction of the globe valve is changed from above the valve flap into the valve cavity, which is under the action of media pressure, the force to close the valve is small, while the force to open the valve is large, the diameter of the valve stem can be reduced accordingly. At the same time, under the action of the medium, this form of valve is also tighter. China's valve "three to" has stipulated that the flow direction of the shut-off valve, all use the top-down. Bellows gate valve open, the opening height of the valve flap, 25% to 30% of the nominal diameter, the flow has reached the maximum, that the valve has reached the full open position. Therefore, the full open position of the globe valve should be determined by the stroke of the valve flap.

Zhejiang Huachi Co., Ltd is a comprehensive enterprise dedicated to industrial process valve research and development, technology cooperation and transfer and technical exchange, sales,, inherited the spirit of rigor and harshness, aimed at providing high-end valves and more cost-effective fluid control solutions for domestic and foreign petroleum, chemical, power, metallurgical, natural gas and environmental protection engineering industries, while using advanced technology at home and abroad, optimize the working conditions design solutions, the use of a variety of materials for custom research and development, and constantly improve the reliability and practicality of the product, the product is very competitive and cost-effective, establishing the company's position in the valve industry.