A large inventory of Dongsi gas valve group DV-D507/11

**Technical Parameters of Dongsi Gas Valve Group Model DV-D507/11**

**Primary Function:** This valve group is designed as a key safety and control assembly for gas pipeline systems. It integrates multiple functions including manual shut-off, automatic emergency shut-off, pressure regulation, filtration, pressure relief, and monitoring into a single, compact skid-mounted unit. Its primary purpose is to ensure safe, stable, and controlled gas supply to downstream equipment such as burners, furnaces, or industrial process lines.

**Core Specifications & Design Features:**

*   **Valve Type:** Integrated safety shut-off valve group, typically featuring a dual-valve (main and monitor) or series valve configuration for fail-safe operation.

*   **Actuation:** Electrically or pneumatically operated actuators for automatic shut-off. Manual override is standard for maintenance and emergency use.

*   **Pressure Rating:** Standard design pressure is typically PN16/PN25/Class 150, with options available for higher pressure applications. Maximum allowable working pressure (MAWP) must be confirmed per specific order.

*   **Connection Standards:** Flanged connections according to ANSI B16.5, DIN, or GB standards. Common end types are RF (Raised Face) or FF (Flat Face). Standard port sizes range from DN50 to DN200 (2" to 8"), with the DV-D507/11 commonly configured for DN80 or DN100 lines.

*   **Leakage Class:** High-performance sealing ensures leakage rates meet or exceed ANSI B16.104 Class IV or Class VI standards for tight shut-off.

*   **Body Material:** Primary components are constructed from carbon steel (WCB) or stainless steel (CF8/304, CF8M/316) for durability and corrosion resistance, suitable for natural gas, liquefied petroleum gas (LPG), and other industrial gases.

*   **Seat & Seal Materials:** Typically utilize PTFE (Teflon), reinforced PTFE, or metal-seated designs depending on the gas composition, temperature, and required sealing performance.

*   **Operating Temperature Range:** Standard models are designed for -20°C to +120°C. Special seals and materials can extend this range for high-temperature or cryogenic applications.

*   **Response Time:** The automatic shut-off valves feature fast closure, typically within 1 to 5 seconds upon receiving a trip signal, to minimize hazard.

*   **Control Signal:** Standard actuators accept