ZMQSY pneumatic steam trap regulating valve
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I. Introduction:
The ZMQSY pneumatic steam trap regulating valve is a new generation of steam trap professionally developed, designed and manufactured by our company based on the steam drainage requirements of thermal power plant equipment. The nearly straight flow design of the steam trap regulating valve reduces flow resistance, and the secondary throttling principle reduces erosion and extends service life. The valve core and valve seat of the pneumatic steam trap are made of integral cemented carbide, with an internal leakage level of ≤ Class VI when closed. The detachable middle cavity sealing design eliminates external leakage and facilitates maintenance. It can also be used in flammable and explosive occasions. According to the signals from the control system or regulating instruments, it can cut off or open the valve, thereby meeting the requirements for controlled parameters. Therefore, the pneumatic steam trap regulating valve is widely used in remote control of industries such as thermal power plants.
II. Features:
1. The upper part of the steam trap regulating valve consists of a valve cover and a packing box, which facilitates quick disassembly and assembly and on-site maintenance. The inclined valve stem structure and excellent flow channel shape design make the medium flow in a nearly straight path. The valve has an excellent Cv value, producing a lower pressure drop than other types of valves.
2. The valve body is surfaced with cemented carbide sealing surfaces using a special process (the sealing surfaces are integrally hardened), making the structure more compact. The tapered sealing surface design allows sealing with a small axial force, providing reliable sealing and long service life.
3. The valve disc guided by the valve body middle cavity has two guide rings, one at the top and one at the bottom of the disc. The disc is guided at both ends, forming a piston-type disc guided throughout the valve body middle cavity, which can eliminate phenomena such as jamming, surface scratching, valve stem bending, and disc vibration caused by improper forces. The guide ring at the bottom of the disc allows 90% of the fluid to pass in a nearly straight path, effectively eliminating adverse effects caused by side impacts. These features make this valve highly suitable for rapid "discharge" and "steam drainage" systems of power station steam.
4. The sealing surface of the valve disc is surfaced with cemented carbide, which has excellent mechanical properties, wear resistance, and erosion resistance, ensuring the valve's long service life.
5. The valve stem packing adopts imported special packing, which provides excellent leakage prevention, is durable, and easy to disassemble and assemble. The seal between the packing box and the valve body uses a flexible graphite gasket with 316 stainless steel wire, assembled at a predetermined torque, ensuring safety and reliability and eliminating external leakage.
6. A pneumatic device is used as the actuator, providing precise, safe, and effective control of the valve.
7. The packing box adopts a special structural design to ensure sufficient strength and good thermal properties.
III. Application:
Designed and manufactured specifically for steam systems of thermal power units, it is widely used in 125MW–1000MW thermal power units. Its function is to discharge boiler steam to a dedicated container through the steam trap during unit startup, shutdown, or accidents when the steam turbine unit does not require steam, ensuring safe operation of the unit. During normal unit operation, the steam trap is required to be closed and leak-free; otherwise, it will cause energy waste. When the unit starts up, shuts down, or has an accident, it must open accurately and reliably to effectively discharge the specified amount of steam, ensuring normal operation.
IV. Parts Materials:
Part Name | Material | ||
Valve Body | 25+Slite21 | 12Cr1MoV+Slite21 | 0Cr17Ni12Mo2+Slite21 |
Valve Disc | 25+Slite21 | 12Cr1MoV+Slite21 | Slite21 |
Valve Stem | 1Cr13 | 25Cr2Mo1V | 0Cr17Ni4Cu4Nb |
Packing Box | 25 | 12Cr1MoV | 0Cr17Ni12Mo2 |
Pressure Plate | 1Cr13 | 1Cr13 | 0Cr17Ni12Mo2 |
Packing | Flexible graphite woven with stainless steel wire | Flexible graphite woven with stainless steel wire | Flexible graphite woven with stainless steel wire |
Packing Gasket | 1Cr13 | 1Cr13 | 0Cr17Ni12Mo2 |
Seal Gasket | High-mesh flexible graphite with 316 wire | High-mesh flexible graphite with 316 wire | High-mesh flexible graphite with 316 wire |
V. Technical Parameters:
Nominal Diameter DN | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | ||
Flow Coefficient | 5 | 8 | 12 | 17 | 29 | 43 | 70 | 100 | ||
Rated Stroke | 16 | 25 | 40 | |||||||
Effective Diaphragm Area | 280 | 400 | 600 | |||||||
Nominal Pressure | 150LB (2.0MPa) – 1500LB (25.0MPa) | |||||||||
Working Temperature | -445 | |||||||||
Connection Thread | M10X1 | M16X1.5 | ||||||||
| Industry Category | Machinery & Equipment/Valves/Control Valves |
|---|---|
| Product Category | |
| Brand: | 上海舟腾 |
| Spec: | ZMQSY |
| Stock: | 99 |
| Manufacturer: | 上海市奉贤区岚丰路900号3幢322A室 |
| Origin: | 113120 |
