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In processes where tight shutoff and reliability are required under high densities, the gate valve shows the best performance with its fluid control function, which can cut or block high-density or high-viscosity fluid. A gate valve opens by lifting a wedge. The distinct feature of a gate valve is that the sealing surfaces between the gate and seats are planar when the gate valve is opened. The flow path is enlarged in a highly nonlinear manner with respect to the percentage of the valve being opened.
| Rating | Class 150 to 2500, JIS 10K to 63K |
|---|---|
| Size | 1/4" to 60" |
| Temperature |
550°C, 1022°F |
| Type | Bolted Bonnet, Pressure Bonnet, Solid Disc, Free Disc, Back Seat |
| Seat Leakage | API 598 |
| Design Code | API 600, API602, ASMEB16.5, ASME B16.10, ASME B16.34, ISO5752 |
A unique advantage of the QS series, the double-seal design is applied to all parts where emission is possible with both soft and metal seals. This design ensures intrinsic fire-safe performance, low emission, and easy maintenance.
*Fire safety -In case of fire, the double sealing mechanism prevents leakage that may occur in the niches of the valve and ensures that fluid is kept inside
Low emission ??The two stages of the seal structure ensure low emission to the outside. The metal seal supports the soft sealing gasket to maximize the intended reduction in emission.
*Easy maintenance-Torque to fasten the body bolt is easily managed when assembling the valve body with a soft sealing gasket. In the double seal structure, a metal seal design is considered with the level of compression of the soft sealing gasket. This design offers simple maintenance in that torque to assemble the body during maintenance is not needed to be controlled.
The bellow is a critical component and forms the heart of the bellow seal valves. The bellow cartridge is welded to both the valve bonnet and the valve stem and has a number of convolutions that compress or expand depending upon the movement of valve stem.
A purge nozzle is used for preventing clogging or residue. Various types of air-purging nozzles can be provided upon customer demand and applied to the bottom, neck, or elsewhere, as per the customer?셲 specifications. It offers various functions, such as anti-toxic gas emission, accumulated particle cleaning, and combustion gas drainage.
QS series gate valves provide a cost-effective solution by incorporating two different materials for the wetted parts and non-wetted parts while providing excellent isolation to meet the harsh requirements for application in any industry.
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