Sanitary Diaphragm Valve

The design and manufacture of sanitary diaphragm valves in Shanghai Yuanan are carried out in accordance with international advanced standards (such as 3A, ASME BPE, EN, DIN, SMS, ISO, etc.). Every process from raw materials to finished products is strictly controlled. Each stage is strictly inspected by corresponding measuring tools and methods to improve the accuracy and perfection of products and ensure the excellent quality of products. These include, but are not limited to, the following: material inspection, dimensional inspection, surface finish inspection, product appearance and identification inspection, etc. Before the product is delivered, each product must undergo strict final inspection to ensure that each product sent to customers is a high-quality product.

Shanghai Yuanan sanitary diaphragm valve is simple and compact in structure, easy to operate, easy to disassemble, easy to maintain and suitable for installation in narrow spaces. The internal fluid channel is smooth and free of dead corners. The valve body and diaphragm are available in different materials and specifications, can be CIP/SIP, and can withstand high pressure sterilization.

Shanghai Yuanan's sanitary diaphragm valves contain a complete product range to meet all needs in the field of aseptic and ultra-hygienic processing. Widely used in medicine, food processing, biopharmaceutical, semiconductor, microelectronics industry and fine chemical industry. Shanghai Yuanan's sanitary diaphragm valves include straight-through diaphragm valves, T-shaped three-way diaphragm valves, U-shaped three-way diaphragm valves, tank bottom diaphragm valves, GMP-compliant straight-through valve body combinations and SAP straight-through valve body combinations. Multi-channel diaphragm valves can also be customized according to customer requirements to meet the diverse needs of customers.

Diaphragm valve body material

Shanghai Yuanan production of stainless steel diaphragm valve body including casting, forging and other processing technology. According to EN10204 3.1B, all 316L valve bodies in contact with the medium shall be provided with the corresponding material traceable certificate of conformity. Shanghai Yuanan production of diaphragm valve body are available.


diaphragm valve diaphragm

Shanghai Yuanan's diaphragm is available in soft elastomer (EPDM) and hard elastomer (PTFE EPDM). Diaphragm materials are all made of polymer materials produced by European famous brands and have obtained FDA and USP certificates respectively, which can meet the various needs of your process. Since the diaphragm is both a dynamic component and a sealing mechanism, it is always in contact with the fluid medium in the pipeline, and different working conditions have different requirements for the diaphragm. In order to select the most suitable diaphragm for application, it is necessary to consider the working pressure and application Temperature and process fluid (product, cleaning fluid, disinfectant, passivation, etc.). Soft elastomers (EPDM) are suitable for most applications and are suitable for applications with higher operating temperatures. A typical feature of soft elastomers is their suitability for mechanically contaminated media. In addition, EPDM is also suitable for continuous steam applications. Rigid EPDM (PTFE EPDM) has a two-piece design, allowing PTFE and EPDM to work independently, which reduces tension caused by different thermal properties and has the highest degree of chemical stability.

The diaphragm is a vulnerable part and must be tested and replaced regularly to avoid functional failure or dangerous conditions. The life of the diaphragm is related to the type of diaphragm material, the type of contact medium, the temperature of the medium and the pressure of the medium acting on the diaphragm, so the diaphragm detection and replacement maintenance cycle depends on the application. Maintenance history and loads due to disinfection or switching frequency must be considered to determine the most appropriate maintenance cycle.

The following table lists the types and applicable working conditions of the diaphragm for your reference and selection.


Recommended pressure-temperature:


Note: 1)EPDM single diaphragm;

2)PTFE EPDM split diaphragm.

Diaphragm valve standard interface size


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