J61W High-Temperature Butt Weld Needle Valve
manufacturer: Kaiweixi Valve Group Co., Ltd
Eml: Merry@kaiweixi.com
Tel: +86 (577) 67038872
Mob: +86 18157711652（WeChat Same Account）
product drawing
J61W High-Temperature Butt Weld Needle Valves
Overview
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.
Features:
1.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.
2.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.
3.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.
4.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.
5.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.
6.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.
7.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.
8.High-pressure design: Robust body structure withstands high working pressures, suitable for combined high-temperature and high-pressure applications.
9.Reliable stem sealing: High-temperature graphite packing or multi-layer flexible graphite sealing with gland prevents external leakage at elevated temperatures.
Dimensions & constructral diagram
J61W High-Temperature Butt Weld Needle Valve constructral diagram
Parts List
| Part name | Stem, Bonnet, Bolt | Stem, Disc, Gasket | Packing | Gasket | Handwheel |
|---|---|---|---|---|---|
| J61W | Chrome-nickel stainless steel | Stainless steel | PTFE, Flexible graphite | Rubber asbestos sheet | High-quality carbon steel |
Performance Specification Sheet
| Nominal Pressure (MPa) | Test Pressure (MPa) | Working Pressure (MPa) | Working Temperature (°C) | Applicable Medium | |
|---|---|---|---|---|---|
| Casing (liquid) | Seal (gas) | ||||
| 1.6 | 2.4 | 0.6 | 1.6 | P≤540°C | Liquefied petroleum gas, water, acid, steam, oil products, etc. |
| 4.0 | 6.0 | 0.6 | 4.0 | ||
| 16.0 | 24.4 | 17.6 | 16.0 | ||
| 32.0 | 48.0 | 35.2 | 32.0 | C≤425°C | |
J61W High-Temperature Butt Weld Needle Valve Dimension Drawing
Outline dimension table
| DN | φ | L | H | D0 |
|---|---|---|---|---|
| DN6 | 10 | 80 | 90 | 63 |
| DN10 | 14 | 96 | 100 | 78 |
| DN15 | 16 | 108 | 102 | 78 |
| DN20 | 20 | 115 | 128 | 100 |
| DN25 | 24 | 135 | 160 | 110 |
