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

Due to the rapid R&D iteration speed of valve products from China Kaivex Valve Group Co., Ltd., the above technical parameters and specification documents, including product overview, features, parts materials, outline dimension charts, CAD drawings, and product instruction manuals, are for your reference only. For actual applications, please contact our valve sales engineers to obtain the support you need for free. Thank you!