J61Y/J61W-320P Needle Valve, High-Temperature Stop Valve, 304/316L Stainless Steel Stop Valve, Socket Weld Stop Valve

Product Overview

J61Y/J61W-320P is an ultra-high-pressure needle globe valve with socket weld connection. It combines the tight closing function of a globe valve and the precise regulation characteristics of a needle valve. Its socket weld connection method provides extremely high connection strength and sealing reliability, making it especially suitable for critical occasions with high leakage risks of high-pressure, high-temperature, toxic or expensive media. It is an indispensable precision control valve for high-pressure pipelines in petroleum, chemical, power station, nuclear power and other fields.

Model Meaning Interpretation (J61Y-320P/J61W-320P)

• J: Globe Valve
  
• 6: Connection type - Welding
  
• 1: Structure type - Straight-through type
  
• Y/W: Sealing surface material (Y = Hard alloy, W = Valve body material)
  
• -320: Nominal pressure - 320 kgf/cm² (approximately 32.0 MPa)
  
• P: Valve body material - Chromium-nickel-titanium stainless steel (e.g., 304, 316L)

Detailed Explanation of Product Features and Advantages

1. Absolute Advantages of Socket Weld Connection

• Permanent Connection: The valve body and pipeline are fused into one through fillet welds, forming a permanent connection without leakage concerns.
• Compact Structure: The connection does not require the installation space needed for flanges, resulting in a more compact structure.
• Extremely High Strength: The weld has high strength, which can effectively bear pipeline stress and severe vibration, and its safety is far superior to that of threaded connection.
• Suitable for Harsh Working Conditions: It is the preferred connection method for pipelines with high-temperature, high-pressure, flammable, explosive and toxic media.

2. Precision Performance of Needle Globe Valve

• Precise Regulation: Fine-thread transmission ensures long valve disc stroke and slow opening, enabling precise flow fine-tuning and avoiding water hammer.
• Tight Shut-Off: The conical sealing pair has tight contact and large sealing specific pressure, which can realize bidirectional zero leakage even under ultra-high pressure.
• Long Service Life: The J61Y model adopts hard alloy (Stellite) sealing surface, which is extremely wear-resistant, erosion-resistant and high-temperature resistant, ensuring an extremely long service life.

3. Key Differences Between J61Y and J61W

Detailed Technical Parameter Table

Main Application Fields

• Power Station Boilers: High-pressure sampling and instrument valves for main steam and feed water systems.
• Petroleum and Chemical Industry: Key shut-off and regulating valves for reaction kettles and high-pressure pipelines.
• Oil and Natural Gas: Ultra-high pressure control for wellhead devices and transmission pipelines.
• Nuclear Power System: Auxiliary systems with extreme sealing requirements.
• High-temperature and high-pressure test devices.

Selection Guide

When selecting this valve, please confirm the following:

1. Medium Characteristics: Whether there are particles, corrosiveness, and the temperature and pressure parameters.

2. Sealing Surface Selection: Harsh working conditions (high temperature, high wear): J61Y (hard alloy sealing) is a must.

3. General working conditions (clean medium): J61W (economical and practical) is optional.

4. Valve Body Material: Select 304 or 316L stainless steel according to the corrosiveness of the medium.

5. Welding Standard: Provide pipeline specifications to ensure the matching of socket size.

Our Advantages

• Forged Valve Body: Adopts high-quality forgings with strong grain fluidity, and its pressure-bearing capacity is far better than that of cast valve bodies.
• Advanced Welding: Plasma overlay welding and other processes are used for the sealing surface to ensure the hard alloy layer is uniform and firm.
• Strict Inspection: 100% implementation of radiographic testing (RT), penetrant testing (PT) and overpressure testing.