Product Model: FQ361F 

Nominal Diameter: DN15–300 mm

Nominal Pressure: PN1.6–4.0 MPa

Applicable Temperature: -29°C to 250°C

Applicable Media: Water, oil, gas, city gas

Product Overview
The vent-type directly buried fully welded ball valve features a seat constructed with a carbon-reinforced PTFE sealing ring and a disc spring, providing strong adaptability to pressure and temperature variations and ensuring no leakage within the rated pressure and temperature ranges.

Materials

1. Body: Carbon steel ST37.0, A106-B; Steel 20

2. Ball: Stainless steel 304 or 316

3. Stem: 2Cr13

4. Stem Seal: Fluorocarbon rubber (FKM)

5. Ball Seal: RTFE (PTFE + Carbon)

Features

1. Nominal Diameter: DN15–300

2. Pressure: PN16–40

3. Working Temperature: -29°C to +200°C

4. Applicable Media: Petroleum/gasoline, LNG/LPG, petrochemical, steel plants, heating pipelines, etc.

5. Operation: Lever, Gear (vertical/horizontal), Electric

Characteristics

1. Directly buried welded ball valves eliminate the possibility of external leakage.

2. Since the seat is constructed with a carbon-reinforced PTFE sealing ring and a disc spring, it has strong adaptability to pressure and temperature changes and will not produce any leakage within the rated pressure and temperature ranges.

3. The ball's machining process is tracked by advanced computerized measuring instruments, resulting in high machining precision.

4. Since the valve body material is identical to the pipeline material, there will be no uneven stress, and it will not deform due to earthquakes or vehicles passing overhead. The pipeline is aging-resistant.

5. The sealing ring body is made of PTFE containing 20% carbon, guaranteeing completely zero leakage (0%).

6. Directly buried welded ball valves can be directly buried underground without the need to build large valve chambers. Only small shallow pits need to be set on the ground, greatly saving construction costs and engineering time.

7. The length of the valve body and the height of the stem can be adjusted according to pipeline construction and design requirements.

8. The ball has extremely high machining precision, ensuring easy operation without adverse interference.

9. High-grade raw materials are used to ensure pressure ratings above PN25.

10. Compared with similar products of the same specifications in the industry, the valve body is smaller and has an attractive appearance.