China wholesale Forged Steel Flanged Gate Valve Manufacturers – High Pressure Slef-Sealing Gate Valve – Ruixin Valve

Features

● The valve self-sealing type bonnet.
● The disc wedging phenomenon is not liable to be caused when temperature rises.
● Flexible wedge.
● Full Stellite overlay seat sealing surface
● Full wedge guiding design.
● Absolute bonnet joint leak proof.
● Optional by-pass design.

Advantages

1.The pressure Self-sealing gate valves are designed in accordance with API600 and ASME B16.34 for service of high temperature and high pressure and are widely used in fossil fuel power plant.
2.Compared with bolted bonnet joint valves, it provides absolute reliable sealing of the bonnet joint, so that the pressure seal valves are more compact and rigid as well as maintenance cost-effective at high temperature and high pressure service.

Other Information

Tips

Customers have special requirements for products and must provide the following instructions in the order contract:
1.Painting Color
2.Confirmed drawing with sign and stamp
3.Service medium, temperature and pressure range
4.Inspection standards and other requirements such as 3rd party inspection .
5.Tell requirement for the logo cast on the valve .
6.Tell requirement about the logo on the Lever. Or label sample.
7.Tell If have special requirement for package .

Inspection

Inspection procedure for API Cast Steel Gate Valve
● Chemical Analysis
   1. Manual Methods
   2.PMI
● Mechanical performance
   1. Tensile Strength
   2.Yield Strength
   3. Charpy impact Test
● Valve thickness test
   Ultrasonic Thickness Gauge
● Dimension and Roughness Test
   Caliper/Digital Caliper/Thread Gauge etc
● Hardness Test
   Hardness Guage
● Welding Procedure Qualification
● NDT Test (MT,PT,UT,RT)
● Torque Test
● Pressure Test
● Painting Inspection
● Final Inspection (Nameplate,Visual appearance…)

API Trim Chart For Pressure Self-sealing gate valves