German ROSSMANEK valves ROSSMANEK models ROSSMANEK prices

ROSSMANEK 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, plus 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 methods are classified into three types: 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 type of valve offers tighter sealing under medium action. 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, the flow rate reaches its maximum when the disc lift height is 25% to 30% of the nominal diameter, indicating that the valve is fully open. Therefore, the fully open position of a globe valve is determined by the disc travel.

ROSSMANEK valve working 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, making it easy to regulate flow. Additionally, it is convenient to manufacture and maintain, and it has a wide pressure application range.

ROSSMANEK valve specification precautions

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 wiping dead corners of the components, it is considered qualified. 1) The valve model should indicate the applicable national standard number. If an enterprise standard is used, relevant model descriptions should be provided. 2) The valve working pressure must be ≥ the pipeline working pressure. Without affecting the price, the pressure the valve can withstand should be greater than the actual working pressure of the pipeline. 3) For valve manufacturing standards, the applicable national standard number should be specified. If an enterprise standard is used, enterprise documentation should be attached to the procurement contract.

ROSSMANEK 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 thus the pressure loss through the valve is correspondingly lower. 3) Angle globe valve: In angle globe valves, the fluid only needs to change direction once, resulting in a lower pressure drop through this valve compared to conventional structure globe valves. American standard bellows globe valve ZDAJ41W type stainless steel valve body American standard bellows globe valve ZDAJ41W type stainless steel valve body 4) Plunger globe valve: This type of globe valve is a variant 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 mainly used for "on" or "off" service, but with specially designed plungers or collars, it can also be used for flow regulation.

Weidou Intelligent Technology specializes in selling German ROSSMANEK valves, ROSSMANEK safety valves, ROSSMANEK globe valves, ROSSMANEK control valves, ROSSMANEK solenoid valves, ROSSMANEK ball valves, ROSSMANEK proportional valves, ROSSMANEK diaphragm valves, ROSSMANEK butterfly valves, ROSSMANEK hydraulic actuated valves, ROSSMANEK check valves, ROSSMANEK pressure reducing valves, ROSSMANEK relief valves, ROSSMANEK sequence valves, ROSSMANEK balance valves, ROSSMANEK throttle valves, ROSSMANEK directional control valves. Original imports from Germany. Welcome inquiries and orders from customers.