Top mounted design: The valve body is cast or forged as a whole, effectively ensuring the compactness of the pressure bearing parts. The sphere is installed from the upper end of the valve body, making it easy to disassemble and maintain online, reducing downtime and maintenance costs.
Valve cover extension design: Strictly control the gap between the valve stem and the extended neck, reduce cold flow upward, and prevent the increase of switch torque and valve stem scratches caused by packing icing. The design of the outer circular long neck annular lunar groove increases the cooling dissipation area and enhances the cooling dissipation effect.
Valve seat structure: Adopting an adjustable spring preloaded valve seat design, the valve seat is pushed towards the sphere under the action of spring and medium pressure, ensuring sealing performance under low temperature and low pressure. Some products use imported PCTFE and other materials for the valve seat sealing surface, which still has good elasticity under ultra-low temperature conditions, ensuring that the seal does not fail.
Valve stem sealing: A lip shaped sealing ring is used to form a primary seal, and then a compressed valve stem packing is used to form a secondary seal. Some products also adopt a self centering design for the pressure cover and pressure sleeve, effectively preventing imbalance caused by uneven force on the pressure cover.
Material: Stainless Steel, Alloy Steel
Nominal Size: NPS 1/2"~24", DN 15~600
Pressure Rate: Class 150~2500, PN 10~420
Temperature Range: -196°C~+150°C
Operator: Manual, Pneumatic, Electric, etc...
Application Range: LNG, LPG, LNG low temperature conditions and long-distance pipelines such as oil, gas, and natural gas.
The C700 Series Low-Noise Control Valve is divided into the CN702 and CDN702 series, mainly designed to reduce the noise of compressible fluids. To adapt to the throttling, diffusion and expansion of gases, the valve core adopts a pressure-balanced structure, and the sleeve is equipped with many symmetrical small holes to reduce pressure drop. The fluid passage is in an S-shaped streamline, and a deflector wing is also provided to improve the smooth flow of the fluid around the sleeve. Therefore, the control valve has low pressure drop loss, large flow rate, low noise and less cavitation corrosion. The control valve is equipped with the RSMF series multi-spring pneumatic diaphragm actuator, which has a simple and compact structure, stronger stability, large output force and long service life.
Special type control valves are customized valve products designed by our company for complex working conditions (such as high temperature, high pressure, strong corrosion, high precision, and low-temperature control, etc.). They possess the ability to precisely regulate flow and pressure, and can meet the stringent requirements in industrial processes.
The Non-Rising Stem Gate Valve is also called the rotating stem gate valve. Stem and nut are arranged on the gate plate, handwheel rotation drive valve stem rotate to lift the gate, usually there is a trapezoidal thread at the bottom of the valve stem and the rotation movement is turned into a linear motion through the limit slot between the valve stem and the gate body and the gate body and the gate, that is, the operation torque is turned into operation thrust. When the valve is turned on, when the height of the gate is equal to the diameter of the valve 1: 1: 1, the channel of the fluid is completely unblocked, but at the run, this position cannot be monitored. In actual use, the vertex of the valve stem is used as a sign, that is, the position that is unmoved as its full opening position. The non-rising stem gate valve has the design characteristics of the ordinary wedge-type gate valve. The valve body has a guide mechanism, which can prevent the gate from rotating when the gate is turned on or closed, ensuring that the seal of the gate on the valve seat is accurate accordingly. At the same time, the wedge valve does not rub with the valve seat before turning off, thereby reducing the wear of the cover and effectively extending the service life of the valve.