The J61W high-temperature butt weld needle valve is a small-bore instrument valve featuring butt weld connections specifically designed for high-temperature applications, operated by rotating the handwheel to drive the stem and needle-type disc for precise opening and closing. Its sealing surface is directly machined from the valve body material (“W” type), forming a metal-to-metal hard seal. Both ends feature pre-fabricated butt weld bevels for direct butt welding to high-temperature pipelines, creating a permanent, zero-leakage sealing structure. This valve is primarily used for root isolation of pressure gauges and transmitters for high-temperature media, pipeline sampling, flow regulation, and draining/venting, especially in critical applications such as high-temperature steam, high-temperature oil, and heat transfer fluid systems requiring strict temperature control, ensuring safe and reliable operation of measurement systems in high-temperature environments.

Product Drawingof J61W High-Temperature Butt Weld Needle Valve

Butt weld connections for permanent sealing: Both ends feature butt weld bevels for direct welding to pipelines, creating a permanent, zero-leakage sealing structure that completely eliminates leakage risks.

Specifically for high-temperature applications: Designed with heat-resistant materials, suitable for high-temperature steam, heat transfer oil, high-temperature gases, etc., with operating temperatures up to 400°C and above.

Heat-resistant alloy steel construction: Body and main components are made of heat-resistant alloy steel (such as 321H, 347H, F22, etc.), maintaining good mechanical properties and corrosion resistance at high temperatures.

Needle-type disc for precise regulation: The needle disc cooperates with the seat to enable precise adjustment and control of small flow rates with excellent regulation performance.

Metal-to-metal hard seal for high-temperature reliability: Sealing surfaces are directly machined from heat-resistant alloy steel, forming a wear-resistant metal-to-metal hard seal that maintains reliable sealing even at high temperatures.

Heat-resistant stem design: The stem is made of heat-resistant alloy steel with hardening treatment, paired with high-temperature graphite packing to ensure reliable stem sealing at elevated temperatures.

Optional heat dissipation fins: Some models can be equipped with heat dissipation fins to effectively reduce the temperature at the stem packing area, extending packing service life.

High-pressure design: Robust body structure withstands high working pressures, suitable for combined high-temperature and high-pressure applications.

Reliable stem sealing: High-temperature graphite packing or multi-layer flexible graphite sealing with gland prevents external leakage at elevated temperatures.

Structure Diagramof J61W High-Temperature Butt Weld Needle Valve

Component name and material

Performance Specification Sheet

J61W High-Temperature Butt Weld Needle Valve Outline Drawing

Outline dimension table