ASME/ANSI American-Standard/DIN/JIS Cast Iron PTFE Lined Flange Connection Plug Valve for Oil System

Product Description

Product Description

The plug valve is a versatile and reliable fluid control valve designed for on/off operation and throttling applications across industrial pipelines. Featuring a cylindrical or conical plug with a through-hole, it regulates fluid flow (liquid, gas, or slurry) by rotating the plug 90 degrees—enabling quick opening and closing within seconds.

Constructed with premium materials such as stainless steel (304/316L), carbon steel, brass, or PTFE-lined alloys, our plug valves offer exceptional corrosion resistance, high-temperature tolerance (ranging from -20°C to 420°C), and pressure resistance (up to 600LB/PN40), making them suitable for harsh working conditions in oil & gas, chemical processing, water treatment, pharmaceutical, and food & beverage industries.

Product Advantages

Compact structure and lightweight design for easy installation and maintenance;

Bubble-tight sealing performance to prevent leakage and ensure system safety;

Low flow resistance and smooth fluid passage, minimizing energy loss;

Multiple end connections (threaded, flanged, socket weld) and operation modes (manual, electric, pneumatic) to meet diverse application requirements.

How does valve work?

The plug valve operates on a straightforward rotational mechanism centered around a cylindrical or conical plug—a key component with a precision-machined through-hole (bore) matching the valve's flow path. When the valve is in the "closed" position, the plug's bore is perpendicular to the pipeline, and its solid body blocks the fluid passage to prevent flow. To open the valve, the plug is rotated 90 degrees (via manual handle, electric actuator, or pneumatic drive), aligning its bore with the pipeline's inner diameter to allow unobstructed fluid flow. Sealing performance is ensured by the tight fit between the plug and the valve body's internal seat—often enhanced by PTFE, graphite, or metal sealing rings. As the plug rotates, the sealing surface maintains consistent contact with the seat, preventing leakage even under high pressure or corrosive conditions. For throttling applications, partial rotation of the plug (less than 90 degrees) adjusts the overlap between the plug's bore and the pipeline, regulating flow rate proportionally. This simple yet robust design enables fast on/off operation, low flow resistance, and reliable sealing, making plug valves ideal for various industrial fluid control scenarios.

Product Parameters

Size Range: DN10 - DN600 (1/2" - 24"), compatible with small to large industrial pipelines.

Pressure Rating: PN1.6 - PN40, Class 150 - Class 600, meeting low, medium, and high-pressure system requirements.

Temperature Range: -40°C - 420°C (varies by material), suitable for cryogenic, ambient, and high-temperature working conditions.

Material Options:
Valve Body/Plug: Carbon steel (WCB), stainless steel (304/316/316L), brass, ductile iron, PTFE-lined alloy.
Sealing Material: PTFE, graphite, metal (316L, Inconel), NBR, EPDM (for different media compatibility).

End Connections: Threaded (NPT, BSPT, BSPP), flanged (ANSI, DIN, ISO), socket weld, butt weld.

Operation Mode: Manual (handle, gear operator), electric (motor-driven), pneumatic (air-actuated), hydraulic.

Sealing Type: Soft seal (PTFE/NBR/EPDM), metal-to-metal seal, bubble-tight seal 

Flow Coefficient (Cv): 5 - 1200 (varies by size and bore design), indicating fluid flow capacity.

Applicable Media: Water, oil, gas, steam, chemical solvents, slurry, corrosive fluids, food-grade materials, etc.

Body Structure: Compact design, full-port/reduced-port options (full-port for minimal flow resistance, reduced-port for space-saving)

Pressure Test: Hydrostatic test (shell and seat), pneumatic test (leakage detection) per industry standards.