Laizhou Dongsheng Valve Co., Ltd products

Check Valves

Laizhou Dongsheng Valve Co., Ltd - Stainless Steel Single Disc Swing Check Valve

Check valves are essential components in piping systems, designed to automatically prevent backflow and drainage. Typically installed on the discharge side of pumps, these valves safeguard systems by ensuring that the medium flows in only one direction, thereby protecting the pump and associated equipment from potential damage caused by reverse flow. The wafer type single disc swing check valves from Dongsheng are specifically engineered for integration within flanged piping systems, offering flexibility for both vertical and horizontal installations. These valves support a working pressure up to 2.5Mpa and are constructed according to various standards such as ANSI 125/150 and EN1092-2. They can handle a range of mediums like fresh water, seawater, various oils, and acidic or alkaline liquids, highlighting their versatility across numerous industrial applications.

Laizhou Dongsheng Valve Co., Ltd - Thin Single Disc Swing Check Valve

The Carbon Steel Thin Type Check Valve is crafted with a carbon steel body and incorporates an NBR O-ring seal. It is designed for use in water, heating, air conditioning, and compressed air systems. This valve is structured to facilitate the flow of fluids by automatically opening under fluid pressure, allowing fluid transition from the inlet to the outlet. However, it prevents backflow by closing when the inlet pressure is less than the outlet pressure, utilizing the fluid pressure difference and the valve's own gravitational force to do so. Tested according to DIN3230 and API598 standards, this valve follows construction standards like ANSI 125/150 and EN1092-2 flanges. It operates efficiently under varying pressure ratings from 1.0Mpa up to 4.0Mpa and can handle temperatures ranging between -20℃ to 180℃ with different elastomers like NBR, EPDM, and VITON. It is suitable for handling various media, including fresh water, seawater, oils, acids, and alkaline liquids.

Diaphragm Valves

Laizhou Dongsheng Valve Co., Ltd - Non-Rising Stem Diaphragm Valve

Diaphragm valves offered by Laizhou Dongsheng Valve Co., Ltd. come in two main types: wire and full flow. These valves utilize a 'pinching' method that employs a flexible diaphragm to control flow and are often unsuitable for extremely high-temperature fluids. Primarily used in liquid systems, these valves are appreciated for their application in handling media such as solid fluids, water, and various chemicals including inorganic acids and alkaline liquids. The valves are designed to operate under specified working pressures that vary with size, such as 1.0MPa for DN50-DN125 sizes. They are constructed to meet standards like the EN588-1 for face-to-face configuration and incorporate flange connections in accordance with EN1092-2 and BS4504. Quality assurance is guaranteed through rigorous testing in line with DIN3230 and API598 standards. Laizhou Dongsheng Valve Co. supports long-term customer partnerships through certified production processes compliant with ISO9001 and CE standards.

Laizhou Dongsheng Valve Co., Ltd - Rising and Non-Rising Stem Diaphragm Valves

Diaphragm valves, often used in liquid systems, function through a 'pinching' method, employing a flexible diaphragm to control flow. These valves are particularly suited for working pressures ranging from DN50-DN125 at 1.0Mpa to DN250-DN300 at 0.4Mpa. They accommodate working temperatures between -20°C to +60°C, following EN588-1 face-to-face dimensions, and flange connections in accordance with EN1092-2, BS4504 standards. Notably, these valves are tested under DIN3230 and API598 standards and are compatible with a variety of media including cement, clay, granular fertilizers, and both fresh and sea water, besides inorganic acids and alkaline liquids. While unsuitable for high-temperature applications, their design enables efficient flow control in constrained environments, emphasizing reliability and adaptability across a multitude of industrial applications.

Butterfly Valves

Laizhou Dongsheng - Wafer Type Butterfly Valve

The range of industrial butterfly valves from Laizhou Dongsheng Valve Co., Ltd. includes lug type, flanged, and wafer type designs, all engineered for precision and reliability in flow control applications. With working pressures rated at 1.0/1.6 MPa, these valves operate efficiently within temperature ranges dictated by their elastomers, such as NBR and EPDM. They are compatible with a variety of piping standards, including DIN, BS, JIS, and ANSI, making them versatile for global applications. Designed for use with mediums like fresh water, sea water, oils, and certain food substances, they undergo rigorous testing per standards like DIN3230 and API598 to ensure performance and safety. Key technical features include a disc-type opening mechanism, lockable handle options, and removable seats, with ductile iron construction supporting temperatures between -5°C and +180°C. These valves offer low material consumption and compact dimensions, lending themselves to cost-effective production and efficient installation.