German olhydraulik altenerding valves, olhydraulik altenerding models, olhydraulik altenerding prices

olhydraulik altenerding valves, also known as globe valves, belong to the forced-sealing valve category. Therefore, when the valve is closed, pressure must be applied to the disc to ensure a leak-tight seal. When the medium enters the valve from below the disc, the resistance that the operating force must overcome consists of the friction between the stem and packing and the thrust generated by the medium pressure. The force required to close the valve is greater than the force required to open it; therefore, the stem diameter must be large enough to prevent bending failure. Connection types are classified into three categories: flange connection, threaded connection, and welded connection. Since the advent of self-sealing valves, the flow direction in globe valves has changed to enter the valve cavity from above the disc. In this configuration, under the action of medium pressure, the closing force is smaller while the opening force is larger, allowing the stem diameter to be reduced accordingly. At the same time, this valve design provides tighter sealing under medium pressure. China's valve "Three Modernizations" regulations previously stipulated that the flow direction for globe valves must always be top-to-bottom. When a globe valve is opened, once the disc lift height reaches 25% to 30% of the nominal diameter, the flow rate reaches its maximum, indicating that the valve is fully open. Therefore, the fully open position of a globe valve is determined by the disc travel.

olhydraulik altenerding Valve Operating Principles and Characteristics

Valves play a crucial role in cutting off and throttling the medium in their respective pipelines. As an extremely important type of shut-off valve, the globe valve achieves sealing by applying torque to the stem, which exerts axial pressure on the disc, causing the disc sealing surface to fit tightly against the seat sealing surface, thereby preventing medium leakage through the gap between the sealing surfaces. The sealing pair of a globe valve consists of the disc sealing surface and the seat sealing surface. The stem drives the disc to move vertically along the centerline of the seat. During the opening and closing process of a globe valve, the lift height is small, facilitating flow regulation. Additionally, globe valves are easy to manufacture and maintain, and they have a wide pressure application range.

olhydraulik altenerding Valve Specification Considerations

Acceptance follows HG 20202-2000 "Code for Construction and Acceptance of Degreasing Engineering". Before assembly, each component is wiped with clean precision filter paper; if the filter paper does not change color when selected from dead corners of the component, it is considered qualified. 1) The valve model shall indicate the required national standard number. If it is an enterprise standard, relevant explanations of the model shall be provided. 2) The working pressure of the valve shall be ≥ the working pressure of the pipeline. Without affecting the price, the pressure the valve can withstand should be greater than the actual working pressure of the pipeline. 3) For the valve manufacturing standard, the national standard number shall be specified. If it is an enterprise standard, enterprise documents shall be attached to the procurement contract.

olhydraulik altenerding Valve Classification

1) Straight-through globe valve 2) Y-pattern globe valve: In Y-pattern or Y-pattern globe valves, the flow passage in the valve body forms an oblique angle with the main flow path. This results in less disruption to the flow state compared to conventional globe valves, and consequently, the pressure loss through the valve is correspondingly lower. 3) Angle-pattern globe valve: In angle-pattern globe valves, the fluid changes direction only once, resulting in a lower pressure drop through the valve compared to conventional globe valve structures. US Standard Bellows Globe Valve ZDAJ41W Type Stainless Steel Body US Standard Bellows Globe Valve ZDAJ41W Type Stainless Steel Body 4) Plunger-type globe valve: This type of globe valve is a variation of the conventional globe valve. In this valve, the disc and seat are typically designed based on the plunger principle. The disc is polished into a plunger shape and connected to the stem. Sealing is achieved by two elastic sealing rings fitted around the plunger. The two elastic sealing rings are separated by a collar, and the sealing rings around the plunger are compressed tightly by the load applied to the bonnet via the bonnet nuts. The elastic sealing rings are replaceable and can be made from various materials. This valve is primarily used for "on" or "off" service, but with specially designed plungers or collars, it can also be used for flow regulation.

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