News
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TWS assists in the construction of key national water conservancy projects
As the construction of the national water network accelerates, a number of key water conservancy projects have reached critical milestones. The Chuzhou Yangtze River Delta Integrated Demonstration Zone Water Supply Guarantee Project and the Xiyang County Water Supply Network Connection and Water ...Read more -
Introduction To Internal Thread & External Thread Valves
1. What is the internal thread connection of the valve? Internal thread connection means that the end of the valve body is processed into a tapered tube or straight tube female thread (internal thread), and the pipe connected to it is processed into a tapered tube or straight tube male thread (ex...Read more -
Introduction to the structure length of butterfly valve EN558-1
EN 558-1 is a European standard that specifically specifies the face-to-face (FTF) and center-to-face (CTF) dimensions of metal valves in flanged piping systems, and is mainly applicable to valves designated by PN (nominal pressure). In the field of butterfly valves, the core role of EN 558-1 is ...Read more -
FM in valves
I. What is FM certification? Why does the valve need it? FM certification is issued by FM Approvals (affiliated with FM Global insurance company) and is a globally recognized authoritative certification in the field of property loss prevention. Unlike UL, which focuses on electrical safety, FM ce...Read more -
Full analysis of DIN butterfly valve: a practical guide from core standards to selection and installation
DIN butterfly valve refers to a butterfly valve that complies with the German Industrial Standard (Deutsches Institut für Normung, DIN). This type of valve follows specific DIN specifications in terms of structure, size, material and performance, ensuring the interchangeability and reliability of...Read more -
Q3 Secondary Water Supply Market: Over 1 Billion Yuan in Projects Released Intensively, Pump Manufacturers Usher in a Peak Order Season
At the beginning of the third quarter of 2026, the national secondary water supply market has entered a period of intensive project releases. Driven by the dual forces of existing facility retrofits and new construction—coupled with the official implementation of the new Hygienic Specification fo...Read more -
Quickly distinguish pipe Φ, DN, and inches
In the design and procurement of pipes, pipe fittings and valves, Φ, DN and inches (“) are three easily confused specification units. Their core difference is that: Φ represents the absolutely real physical outer diameter, DN is the specification code in the metric system, and inches is the...Read more -
UL in Valves
I. What is UL certification? Why does the valve need it? UL (Underwriters Laboratories) is a world-renowned independent safety certification organization. In the North American market, UL certification is not mandatory by the government, but it is an “access card” for fire protection,...Read more -
Double Flange Restrained Expansion Joint VS Double Flange Force Transfer Joint
In pipeline connections, double-flange limit expansion joints (VSSJA-2/B2F type) and double-flange power transmission joints (VSSJAF/C2F type) are two common products with different functions. Although both are used to connect pipes with flanges at both ends, they are obviously different in appea...Read more -
Grooved Butterfly Valve
1. What is a grooved butterfly valve? What are its core strengths? The grooved butterfly valve is a butterfly valve that uses a clamp connection method. Its core advantage is that it is extremely convenient to install and disassemble, without the need for complicated welding or threading operatio...Read more -
Butterfly valve soft seal and hard seal
1. What is the fundamental difference between soft seal butterfly valve and hard seal butterfly valve? The sealing ring material is different. The sealing pair of a soft-sealing butterfly valve is “metal seat + non-metal sealing ring”, and commonly used materials include rubber (EPDM/...Read more -
Butterfly Valve Used in Municipal Water Supply Project
Municipal water systems need durable valves for high flow, changing pressure, and varied conditions. Butterfly valves are popular in medium-to-large pipelines for their compact design, fast action, and cost-effectiveness. But choosing one isn’t just about size—material, disc, seat, connecti...Read more
