FL Buried Maintenance‑Free Gas Gate Valve‑Valve for Municipal Gas Pipeline Network：
Product Brief
The FL maintenance‑free gas gate valve takes safety as core design principle, every structural detail is optimized for gas service conditions. It is fitted with fully rubber‑encapsulated wedge gate disc made of world‑famous brand NBR nitrile rubber. With rigorous standardized vulcanization prossess, the disc obtains excellent wear resistance and resilience, resisting aging and deformation for long‑term underground service. Adopting triple stem seal structure, this valve allows seal replacement under operating pressure without gas venting, ensuring stable and secure operation of gas transmission pipelines. Constructed with WCB carbon steel body, flange connection, DN300 as regular size, well suited for most municipal gas projects.
Fully Encapsulated Wedge Rubber Disc
The whole gate disc is fully covered with rubber to prevent metal substrate directly contacting gas medium and reduce erosion wear. Imported NBR nitrile rubber is resistant to gas swelling. Vulcanization treatment tightly combines rubber and metal, effectively avoiding rubber peeling and crack, extending service life under buried environment and lowering pipeline replacement cost.
Triple Stem Sealing System
Three independent seals work as multi‑barrier protection to prevent gas leakage. During on‑site maintenance, stem seals can be replaced directly under normal operating pressure without gas shut‑off or pipeline venting. It saves maintenance hours and reduces gas loss, ideal for municipal gas networks where frequent service interruption is not allowed.
WCB Carbon Steel Body for Buried Installation
Valve body adopts WCB cast steel with high mechanical strength to withstand soil load. Flange connection simplifies on‑site piping work. Anti‑corrosion surface finish protects against moisture, weak acid and alkali inside soil, widely applied in city municipal gas supply, industrial park gas transmission and gas pressure regulating station.
Application Working Conditions
Municipal natural gas distribution pipeline, buried gas main and branch line, commercial & industrial gas supply system, auxiliary piping for gas pressure regulating station. Suitable for gas engineering projects in Europe, Middle East and Southeast Asia.
Basic Specifications
• Body Material: WCB Carbon Steel
• Connection Type: Flanged
• Typical Size: DN300
• Applicable Media: Natural gas, town gas
• Key Feature: Maintenance‑free, stem seal replaceable under pressure, suitable for buried installation
