CNC Precision Stainless Steel High-Pressure Double Male Thread Union | Fully Welded Check Valve

Product Overview:

This CNC Precision High-Pressure Union with Integrated Check Valve is engineered for demanding fluid control applications where reliability, durability, and zero leakage are critical. Fabricated entirely from stainless steel, the fitting combines a double male thread (double male NPT) union with a fully welded, one-piece check valve in a single, robust unit.

Key Features & Benefits:

• Integrated Check Valve Design: The permanently welded check valve prevents backflow effectively, ensuring system safety and eliminating the need for a separate valve component. Its one-piece construction minimizes potential leak paths.

• High-Pressure Reliability: Engineered to withstand sustained high-pressure environments, making it ideal for hydraulic, pneumatic, and process systems.

• Precision CNC Machining: All threads and sealing surfaces are precision CNC machined, guaranteeing exact tolerances, perfect thread engagement, and a secure, leak-free seal.

• Double Male Thread (Double Male NPT): Features male threads on both ends for straightforward inline installation between female ports, simplifying system assembly and maintenance.

• Corrosion-Resistant Construction: Manufactured from stainless steel, the union offers excellent resistance to corrosion, oxidation, and wear, ensuring long service life even in harsh or washdown environments.

• Zero-Leak Welded Body: The fully welded body between the valve and union sections provides superior structural integrity and a leak-proof connection, enhancing overall system integrity.

Typical Applications:

• Industrial Hydraulic & Pneumatic Systems

• High-Pressure Process Lines

• Chemical & Petrochemical Transfer

• Water Treatment and Irrigation Systems

• Food & Beverage Processing Equipment

• Marine and Offshore Applications

Specifications:

• Material: 304 or 316 Stainless Steel (Optional)

• Pressure Rating: [e.g., 3000 PSI / 207 BAR]

• Thread Type: NPT (Standard) / BSPP / BSPT (Available)

• Size Range: [e.g., 1/4" to 2"]

• Temperature Range: [e.g., -20°F to 400°F / -29°C to 204°C]

• Standards: Compliant with ASTM/ASME standards.

FAQ

Q1: What is the key advantage of this integrated union and check valve design?
A: The primary advantage is high-pressure integrity and zero leakage in a single compact unit. By combining a double male thread high-pressure union with a permanently welded check valve, it eliminates potential leak points found in threaded valve assemblies, simplifies installation, and provides superior reliability under continuous high-pressure conditions.

Q2: What does "Double Male Thread" mean, and how is it installed?
A: "Double Male Thread" means both ends of the fitting have external (male) threads, such as NPT male threads. It is designed to connect directly between two female-threaded ports. For installation, simply apply appropriate thread sealant (e.g., Teflon tape) to both male ends and screw them into the corresponding female ports. Ensure proper torque to achieve a secure, leak-tight seal.

Q3: How does the "Fully Welded" construction improve performance compared to threaded check valves?
A: The fully welded, one-piece body offers significant benefits:

• Leak-Proof: Removes the threaded joint between the union and valve, eliminating a common failure point.

• Enhanced Strength: The welded joint provides excellent vibration and pressure surge resistance.

• Compact & Clean Design: Reduces overall assembly length and avoids cavity traps where contaminants could accumulate.

Q4: What is the pressure rating of this product?
A: This is a high-pressure rated fitting. The exact pressure rating (e.g., 3000 PSI / 207 BAR) varies by size and stainless steel grade (304 or 316). Please refer to the detailed technical specifications for each product code. Custom ratings are available for extreme applications.

Q5: Is this product suitable for corrosive fluids or harsh environments?
A: Yes. Manufactured from stainless steel, it offers strong corrosion resistance.

• 304 Stainless Steel: Ideal for general industrial use with water, oils, air, and mild chemicals.

• 316 Stainless Steel (optional): Recommended for more aggressive environments, including chlorides, seawater, or certain chemical processes. Specify your media and operating conditions for material guidance.

Q6: Can this product be customized? What are the standard material and specification options?
A: Yes, customization is available.

• Standard Materials: 304 or 316 stainless steel.

• Standard Specifications: Common NPT sizes (¼" to 2") and standard pressure classes.

• Custom Options: We can provide special sizes, alternative thread standards (BSPP, BSPT), different pressure ratings, surface finishes (electropolish for sanitary use), or material certifications. Contact us with your requirements for a quote.

Q7: Are there any certifications or test reports available?
A: Yes. Our products are manufactured in compliance with ASTM/ASME standards. Every unit undergoes individual pressure testing (typically hydrostatic or pneumatic) before shipment. Material test reports (MTRs) and pressure test certificates can be provided upon request.

Q8: How do I ensure I select the correct product for my system?
A: To confirm suitability, please provide the following details:

• Operating pressure & temperature

• Fluid/media type

• Thread type and size required (e.g., ½" NPT)

• Connection configuration (confirm double male ends)

• Application environment
  Our technical sales team will assist you with final selection.

Qingdao Sande Technology Co., Ltd. is located in Qingdao. We are specialized in manufacturing forging, CNC machining and various surface treatments. We have over 16 years of experience.
We have a professional and experienced team of engineers, advanced production and testing equipment, a powerful quality control system, and professional customer service... We will offer professional services, high-quality products and favorable prices. We sincerely welcome domestic and foreign customers to cooperate with us!