Stainless Steel Check Valve, Straight Through Welded High-Pressure Check Valve, Zero Leakage High-Pressure Stainless Steel Non-Return Valve

Product Overview

The stainless steel high-pressure check valve is a key safety component for hydraulic systems and high-pressure pipelines. Adopting a straight-through welded structure, it is specially designed for harsh working conditions. The product realizes the one-way shut-off function through the precision-machined valve core and valve seat, effectively preventing medium backflow and ensuring system safety. The valve body is made of stainless steel and supports welded connection, meeting the requirement of zero leakage. It is widely used in hydraulic, petrochemical, energy and other fields.

Product Features

1. High-Pressure Zero Leakage Design

• Precision-ground valve seat with a sealing surface fit rate > 95%
• Hard-sealed structure ensures no leakage after 100,000 opening and closing cycles
• Wide applicable pressure range (0.1~42MPa)

2. Advantages of Stainless Steel Valve Body

• 304/316L stainless steel with strong corrosion resistance
• Integrally forged structure with excellent pressure-bearing capacity
• Surface polishing treatment (Ra ≤ 0.8μm)

3. Straight-Through Welded Structure

• Low flow resistance (drag coefficient ≤ 0.2)
• Welded connection eliminates interface leakage
• Low requirement for installation space

4. Intelligent Opening and Closing Characteristics

• Adjustable spring preload
• Response time < 0.1 second
• Minimum cracking pressure of 0.01MPa

Core Parameters

Application Fields

• Construction Machinery: Hydraulic cylinder pressure-holding circuit
• Petrochemical Industry: Prevention of backflow at pump outlet
• Energy Equipment: Boiler feed water system
• Experimental Equipment: High-pressure test circuit

Selection Guide

Selection by Medium

Selection by Pressure

• < 10MPa: Standard spring configuration
• 10-25MPa: Reinforced spring configuration
• 25-42MPa: Special spring configuration

Quality Assurance

• 100% Pressure Testing (1.5 times pressure-bearing capacity)
• Helium Mass Spectrometry Leak Detection (for hard-sealed models)
• Material Certification (ISO 9001/PED)