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DIN Compliant Wedge Gate Valve

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  • Concentric Butterfly Valve

    Concentric Butterfly Valve

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  • Replaceable Soft Seat Butterfly Valve

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  • JIS 5k Or 10k Brass Seal Gate Valve

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  • When to use a lever handle and when to use a gear operator for a butterfly valve?

    The choice between a lever handle and a gear operator (worm gear) for a butterfly valve mainly depends on pipe diameter, working pressure, frequency of operation, as well as considerations of effort and cost. In short: Lever-handle butterfly valve: Simple structure, low cost, and quick to open/close. Suitable for small diameters (typically DN ≤ 200 mm), low pressure, and infrequent operation. Gear-operated butterfly valve: Uses a worm gear reducer for transmission, making operation easier, with better sealing and longer service life. Suitable for large diameters (typically DN > 200 mm), medium/high pressure, frequent operation, or applications requiring precise flow regulation.

  • What is Wafer-Type Connection?(1)

    Wafer-type connection is a method of fastening valves (especially butterfly valves, check valves, etc.) between pipe flanges using long bolts. Its defining characteristic is: the valve does not have its own integral flanges; instead, long bolts pass through the flanges of the two pipes to secure the valve in the middle.

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    Possible causes: Wear or damage to the valve seat sealing surface; aging or damage to the butterfly plate sealing ring; impurities blocking the sealing surface within the pipeline.

  • How Does a Check Valve Work and Why Is It Essential for Fluid Control Systems?

    In fluid transport systems, maintaining the correct direction of flow is critical to system safety, efficiency, and equipment protection. A check valve is a mechanical device designed to automatically prevent reverse flow in pipelines without requiring manual operation or external control. This article explains how a check valve works, its structure, common types, installation considerations, and how to select the right valve for different industrial applications. The goal is to help engineers, procurement managers, and facility operators solve common system problems such as backflow damage, pressure fluctuations, and pump failure.

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    The Cast Iron Wafer Dual Plate Check Valve is a critical component in modern pipeline systems. Designed for durability, high performance, and minimal maintenance, this type of check valve is widely used in water supply, HVAC, fire protection, chemical industries, and more. Manufactured by Zhejiang Zhongguan Valve Manufacture Co., Ltd., this valve offers excellent resistance to corrosion and pressure, making it a dependable choice for fluid control.

  • A batch of products from Zhongguan Valve has been successfully exported overseas!

    Recently, our company has successfully completed the production of the orders set by the customers and has successfully packed and dispatched the goods to the countries where the overseas customers are located. This batch of orders mainly includes butterfly valves and gate valves, providing services for the market where the customer is located.

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