Company News


Difference Between Limit Switches and Proximity Switches

Limit switch is a mechanical device that is used to detect the presence or absence of an object within a certain range of motion. It is typically used to control the movement of machinery or equipment by stopping or starting the motion when the object reaches a certain point.

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Differences between Rising Stem Gate Valves and Non-Rising Stem Gate Valves

In a rising stem gate valve, the stem moves up and down as the valve is opened or closed. When the valve is opened, the handwheel is turned, causing the threaded stem to rise. As the stem rises, it lifts the wedge, allowing fluid to flow through the valve.

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KV value flow coefficient of the stop valve

The KV value (also known as the flow coefficient or CV value in some regions) of a valve is a measure of its flow capacity. Specifically, it represents the volume of water in cubic meters per hour (m³/h) that will pass through the valve with a pressure drop of 1 bar (100 KPA or approximately 14.5 psi) across the valve.

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SEDELON Valve Knowledge Science-An Introduction to RGD Elastomer (Delta-ring)

Rapid Gas decompression (RGD) resistance, also known as Anti Explosive Decompression (AED), is widely used in Energy, Oil & Gas industries. The most frequently used materials are Viton or FKM.

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Types of valve gaskets

Compound gaskets: These gaskets are made from a combination of different materials. It is designed to provide a reliable seal between two surfaces, preventing the leakage of fluids or gases. They are often composed of a soft material, such as rubber or silicone, combined with a metal or fiber reinforcement for added strength and durability.

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Sedelon double disc parallel slide gate valve

Recently, Sedelon produced a large double disc parallel slide gate valve, 24inches 900LB, weighing over 7 tons. It can be used in high-temperature media, up to 400 degrees Celsius.

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Sedelon Valve- API Certificates

What a joy! We have renewed our valve certificate in 2023 and have more valve certificates.

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SEDELON Technical Data Sheet

Choosing the appropriate valve seat material is the most challenging decision in the selection of ball valves. SEDELON Ball valves are available in a variety of seat and sealing options for a variety of general and specialty services. Soft-seat ball valves are factory shut-off tested and built to last.

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Sedelon Pneumatic Ball Valve

Sedelon has recently produced a batch of ball valves with Rotork pneumatic actuators.

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Globe valve "flow from top to bottom" and "flow from bottom to top" types

The shut-off valve is designed for low inlet and high outlet, with the aim of reducing flow resistance and saving effort when opening the valve.

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Sedelon Bellows Sealed Globe Valve

Sedelon manufactures bellows sealed globe valve. It forms a metal barrier between the medium and the atmosphere through automatic roll welding to ensure zero leakage of the stem.

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Sedelon Large size dual plate check valve

A dual plate check valve is a type of check valve that consists of two spring-loaded plates that are hinged together and positioned within the valve body. When the fluid flows in the forward direction, the plates are pushed open, allowing the fluid to pass through. However, when the fluid flows in the reverse direction, the plates are forced shut by the pressure of the fluid, preventing backflow. This type of valve is commonly used in applications where backflow prevention is critical, such as in water treatment plants, oil and gas pipelines, and chemical processing plants.

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