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This is a detailed specification for various types of valves suitable for use in water systems, primarily in the United States. The valves must meet strict industry standards and certifications to ensure safety, durability, and performance.
For **gate valves** with a **DN 65 size**, the rated working pressure should be **above 175 psi**. The valve body and bonnet should be made from **cast bronze alloy** that meets the **ASTM B 62** standard. The structure should be **OS & Y** with **threaded connections**. These valves must be **UL** and **FM certified**, and conform to the **MSS-SP80** standard. An example model is the **Nibo Ke T-104-O gate valve**, which uses a **PTFE seat**. It should also be equipped with a **climate-proof gear actuator** for both indoor and outdoor use, along with a **raised position indicator** and **two built-in monitoring switches**.
For **ball valves** with **DN 65 and above**, the rated working pressure should also be **above 175 psi**. These include models like the **NIBCO KT-505 (threaded)** and **KG-505-8W (slot connection)**. The valve body can be **cast iron** with **bronze trim** or have an **elastomeric seal wedge**. If using an **elastic wedge**, the internal parts should be coated with **epoxy resin**. Connections should be **125-pound flanged or slot type**, and the valves must be **UL**, **FM**, or **MSS-SP110** certified.
**Gate valves** for **DN 100 and above** should be rated for at least **175 psi**, with **bronze trim** and **resilient rubber seal wedges**. The body and bonnet should be made of **cast iron (ASTM A126 Class B)** or **ductile iron (ASTM A536)** with an **OS & Y bonnet**. They should have **flanged or mechanical connections**, and an **adjustable vertical indicator column** for deep burial applications. Models such as **NIBCO F-609** or **F-609-RW** are available, with **UL**, **FM**, and **MSS-SP70** compliance.
**Check valves** must have a minimum working pressure of **175 psi**, with **bronze trim** and a **rubber-metal seat**. The body should be **ASTM A126 Grade B cast iron**, with **flanged or clip-on connections**. They must be **UL** and **FM** certified and comply with **MSS-SP71**. Examples include the **Nibo Ke F-908-W** and **KW-900-W**.
For **butterfly valves**, the working pressure should be **not less than 175 psi**, with **ductile iron bodies (ASTM A395/A536)** and **stems made of 400 series stainless steel**. They should be equipped with **weatherproof gear actuators**, **hand wheels**, **position indicators**, and **monitoring switches**. Connections can be **plate (clip-on)** for **125/150 lb flanges or IPS tubing**, and they must meet **MSS-SP67** standards. Available models include the **NIBCO WD-3510-8** and **GD-4765-8N**.
**Stem valves** require a **minimum working pressure of 300 psi**, with **cast iron (ASTM A126 Class B)** bodies and **OS & Y bonnets**. Connections should be **flanged (250 or 300 lb)**, and they must pass **UL**, **FM**, or **MSS-SP70** certification. The **Nibo Ke F-697-B** is a suitable option.
**Stem check valves** also need **at least 300 psi**, with **horizontal swing design**, **bronze trim**, and **cast iron (ASTM A126 Class B)** construction. They should be **flanged (250 or 300 lb)** and meet **UL**, **FM**, or **MSS-SP70** standards. The **Nibo Ke F-968-B** is a recommended model.
For **drainage systems**, **ball valves** with **DN 65 and below** should have a **minimum working pressure of 175 psi**, **PTFE seats**, **threaded connections**, and **anti-blowout stems**. They should be **UL** or **FM** certified and meet **MSS-SP110**. Examples include the **NIBCO KT-585-70UL** and **KT-580-70UL**.
**Globe valves** and **angle valves** must have a **minimum pressure rating of 175 psi**, with **rubber seat flaps** and **threaded ports**. They should be **UL-certified** for drainage. Available models include the **KT-65-UL**, **KT-211-WUL**, **KT-67-UL**, and **T-301-W**.
Finally, **check valves** for general use should have **at least 175 psi**, **rubber seat flaps**, and **threaded ports**, with a **Y-shaped horizontal swing** design. They must follow **MSS-SP80** standards. The **Nibo Ke KT-403-W** is a suitable choice.
These specifications ensure that all valves are suitable for use in critical water systems, meeting high-quality and safety requirements across the U.S.
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