As a seasoned engineering professional, you understand the importance of selecting the right gate valves for your industrial applications. At Shanghai Thinktank Process Management Co., Ltd, we share your commitment to excellence and recognize the need for high-quality, cost-effective solutions that meet local market demands. Our THINKTANK brand is dedicated to providing top-tier gate valves, backed by our extensive industry experience and expertise.
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Best Gate Valve Supplier-THINKTANKGate valves are widely used in various industries due to their excellent shutoff capabilities and low-pressure drop. They control the flow of liquid or gas by raising or lowering a gate, which moves perpendicular to the flow direction. There are two main types of gate valves: rising stem gate valves and non-rising stem gate valves.
gate valve animationRising stem gate valves feature a stem that rises vertically as the gate is lifted. The rising stem allows operators to visually determine the valve’s open or closed position, ensuring proper flow control.
rising stem gate valveA rising stem gate valve is a type of gate valve that features a stem that rises vertically as the gate is lifted to open or close the flow. This movement provides a clear visual indicator of the valve’s position, which is crucial for ensuring proper flow control and safety in various industrial applications.
As a leading manufacturer and supplier of industrial valves, THINKTANK understands the importance of quality, reliability, and precision in gate valve design. Our rising stem gate valves are engineered with the highest standards, ensuring exceptional performance and durability even in the most demanding conditions.
By choosing THINKTANK as your reliable supplier for rising stem gate valves, you can be confident in the quality and performance of our products. Our expert team is dedicated to providing exceptional customer service, technical support, and timely delivery to ensure your projects run smoothly and efficiently.
Non-rising stem gate valves have a stem that remains stationary while the gate moves up and down. The stem is threaded and connects directly to the gate, making these valves more compact than their rising stem counterparts.
non-rising stem gate valveA non-rising stem gate valve functions by using a threaded stem that remains stationary while the gate moves up and down to open or close the flow. The stem is threaded on the inside and connects directly to the gate, which moves along the stem’s threads when the handwheel is rotated.
rising gate valve supplierHere’s a step-by-step explanation of how a non-rising stem valve works:
THINKTANK is committed to providing high-quality non-rising stem gate valves that deliver reliable performance across various applications. Our expert team is available to assist you in selecting the most suitable valve for your specific needs, ensuring optimal functionality and efficiency in your projects.
Both rising stem and non-rising stem gate valves have their unique advantages, making them suitable for different applications. Here’s a comparison of their key features:
rising gate valve suppliernon-rising stem gate valveFeatureRising StemNon-Rising StemVisual IndicatorYes, clear position indicationNo, position not easily visibleMaintenance EaseEasier, accessible stem and packingMore difficult, limited accessFrictionLower, less wear and tearHigher, increased wear and tearSpace RequirementMore space is needed, larger stem areaCompact design, ideal for tight spacesCostGenerally higher, due to complex designGenerally lower, simpler designRisk of LeakageHigher due to exposed stemLower, fewer exposed partsApplicationsSuitable for high-pressure and high-temperature systemsIdeal for space-constrained, low to moderate-pressure systemsIt’s essential to consider these differences when choosing a gate valve for your specific requirements. For instance, if visual indication and easy maintenance are top priorities, a rising stem gate valve might be the better choice. On the other hand, if space limitations and cost are significant concerns, a non-rising stem gate valve could be the ideal solution. Ultimately, the decision should be based on the specific needs of your application and the factors most important to your project’s success.
non-rising gate valves factoryAs a professional valve manufacturer, THINKTANK recognizes that gate valves are utilized across a diverse range of industries and applications. However, it is challenging to pinpoint a single gate valve type as the most widely used, as the choice depends on the specific requirements and conditions of each application.
That being said, the two most common types of gate valves are the rising stem gate valve and the non-rising stem gate valve. Each has its own unique advantages and is suitable for different situations:
At THINKTANK, we strive to provide high-quality gate valves tailored to the specific needs of our customers. Our expert team is always available to assist you in selecting the most suitable gate valve type for your unique application, ensuring optimal performance and reliability for your projects.
non-rising gate valves manufacturerSelecting the right gate valve for your industrial applications is a critical task that demands a thorough understanding of the advantages and disadvantages of each valve type. As a leading brand by Shanghai Thinktank Process Management Co., Ltd, THINKTANK is committed to offering top-quality gate valves that deliver on performance without compromising on cost-efficiency. We trust that the information provided in this guide will help you make an informed decision that aligns with your requirements and contributes to the success of your projects. Should you have any further questions or need assistance in selecting the perfect gate valve, our experienced team of professionals is always here to help.
Gate valves are widely used for all types of applications and are suitable for both above-ground and underground installation. Not least for underground installations it is paramount to choose the right type of valve to avoid high replacement costs.
Gate valves are designed for fully open or fully closed service. They are installed in pipelines as isolating valves, and should not be used as control or regulating valves. Operation of a gate valve is performed doing an either clockwise to close (CTC) or clockwise to open (CTO) rotating motion of the stem. When operating the valve stem, the gate moves up- or downwards on the threaded part of the stem.
Gate valves are often used when minimum pressure loss and a free bore is needed. When fully open, a typical gate valve has no obstruction in the flow path resulting in a very low pressure loss, and this design makes it possible to use a pipe-cleaning pig. A gate valve is a multiturn valve meaning that the operation of the valve is done by means of a threaded stem. As the valve has to turn multiple times to go from open to closed position, the slow operation also prevents water hammer effects.
Gate valves with rising stems
Turn the hand wheel to raise or lower the valve plate connected to the valve stem by the movement of threads of hand wheels, achieving the purpose of opening and closing.
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Advantages of gate valves with rising stems are as follows:
Gate valves with rising stems have small fluid resistance, and their sealing surfaces are less scoured and corroded by the medium.
Gate valves with rising stems can be opened or closed with less strength.
The flow direction of the medium is not restricted.
Gate valves with rising stems have simple shapes, short structure, good manufacturing process and wide range of applications.
Disadvantages of gate valves with rising stems are as the following:
Scouring and scratches easily occur between the sealing surfaces, which are difficult to repair.
The overall size is relatively large; a certain amount of space is required for opening, and the opening and closing time is long.
The structure of gate valves with rising stems is more complicated.
Gate valves with rising stems
The valve stem's nut is set on the valve plate. The rotation of the handwheel drives the valve stem to lift the valve plate. Usually there is a trapezoidal thread at the bottom end of the valve stem. The thread at the bottom end of the valve and guide groove on the disc will change the rotational motion to rectilinear motion, that is, the operating torque is changed to the operating thrust.
When the valve is opened and the lift height of the plate is equal to the valve diameter, the fluid passage is completely unblocked. However, this position cannot be monitored when the valve is in operation. In actual use, the apex of the valve stem is used as a mark, that is, the position where the valve cannot be opened, as its fully open position. To prevent the valve from being stuck due to temperature changes, when the stem is at the top position, make the stem turn back 1/2 to 1 thread as its fully opened position. Therefore, the fully opened position of the valve is determined by the position of the valve plate, that is, the stroke.
The advantage of this structure is that the height of the gate valve always remains the same, resulting in installation space being small, which is suitable for gate valves with large diameters or restricted installation space. Gate valves with this kind of structure must be equipped with an opening and closing indicator to indicate the degree of opening and closing. The disadvantage of this structure is that the valve stem's thread not only is unable to be lubricated, but it is directly corroded by the medium, causing damage easily.
Gate valves with rising vs non-rising stem design
Rising stems are fixed to the gate and they rise and lower together as the valve is operated, providing a visual indication of the valve position and making it possible to grease the stem. A nut rotates around the threaded stem and moves it. This type is only suitable for above-ground installation.
Non-rising stems are threaded into the gate, and rotate with the wedge rising and lowering inside the valve. They take up less vertical space since the stem is kept within the valve body. Gate valves with non-rising stems are suitable for both above-ground and underground installations.
Rising stem
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