API Wedge Type Gate Valve
Brief introduction of API wedge item gate valve
The opening and closing part of the flange stainless steel gate valve is a gate. The movement direction of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate has two sealing surfaces. The two sealing surfaces of the most commonly used wedge gate valve form a wedge. The wedge angle varies with valve parameters, usually 50, and 2°52' when the medium temperature is not high. The gate of the wedge gate valve can be made into a whole, called a rigid gate; it can also be made into a gate that can produce slight deformation to improve its manufacturability and compensate for the deviation of the angle of the sealing surface during the processing. It is called an elastic gate.
Product features: ①The product design meets the requirements of foreign advanced standards, with reliable sealing and excellent performance. ②Compact and reasonable structure design, beautiful appearance. ③Using wedge-type elastic gate structure, rolling bearings with medium and large diameters, easy to open and close. ④Valve body materials are complete in variety, and packing and gaskets are reasonably selected according to actual working conditions or user requirements, which can be applied to various pressure, temperature and medium working conditions. ⑤Adopt a variety of domestic and foreign pipe flange standards and flange sealing surface types to meet various engineering needs and user requirements.
Product specification of API disc gate valve
Pressure classes: Class 150
Size range: DN25-DN600
Material: WCB, CF3,CF8M
Temperature: -29～350℃
Collection end: RF
Medium: steam, gas, water, oil
Technical data of American standard wedge gate valve
manufacturer's standard: API600
Inspection and test standard: API 598
Structural length standard: ANSI B16.10
Flanges standard: ANSI B16.5
| Class（Lb） | Strength test | Water seal test | Gas seal test | |||
| MPa | Lbf/in2 | Mpa | Lbf/in2 | MPa | Lbf/in2 | |
| 150 | 3.1 | 450 | 2.2 | 315 | 0.5~0.7 | 60~100 |
Material Table of API wedge constructed gate valve
| Body,bonnet,disc | WCB | CF8（304） | CF3（304L） | CF8M（316） |
| sealing surface | Cr13 | |||
| stem and trim | 2Cr13 | 0Cr19Ni9（304） | 00Cr19Ni11（304L） | 0Cr17Ni12Mo2（316） |
| packing | flexible graphite | |||
| gasket | SS wound gasket | |||
| medium | water, steam, oil | nitrate acid and other corrosive media | Strong oxidizing medium | |
| temperature | -29~425℃ | -40~500 ℃ |
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