Power Station Globe Valve Manufacturer in China
The power station globe valve adopts a pressure self-tightening sealing structure between the valve body and the valve cover. The internal medium pressure acts on the sealing ring, and the higher the pressure, the greater the sealing pressure ratio, thereby preventing the leakage of the medium. The sealing surfaces of the valve seat and the valve disc are usually welded or sprayed with Samtler cobalt-based hard alloy. This material has excellent high-temperature resistance, corrosion resistance, and erosion resistance, and can withstand the long-term erosion of high-speed fluids.
The Higher the Pressure, the Tighter the Seal
Our Longz power station globe valve isolates by driving the disc axially onto the seat — the stem does the lifting, line pressure does the sealing. As your steam pressure climbs, the medium acts on the cavity behind the sealing ring and drives it harder against the seat, so the shutoff tightens with the duty instead of relaxing under it.
Power Station Control Valve - Single Seat Design
Our longz model power station globe valve adopts a single-seat valve structure design. This design can effectively eliminate potential safety issues that may arise from the increase in pressure within the valve chamber, thereby ensuring the safety and reliability of the valve during operation.
Your Trusted power station globe valve supplier in China
Longz has obtained ISO 9001 international quality management system certification, ISO 14001 environmental management system certification, API certification from the American Petroleum Institute, and other certificates confirming that its products meet domestic and international authoritative quality standards. The company also holds more than 50 invention patents and technology innovation patents.
Our Longz Low Torque Globe Valve adopts a V-shaped formed PTFE as the moving seal, and uses packing to provide the initial seal. As the pressure of the medium on this side increases, the sealing performance of the packing improves, thus achieving self-sealing functionality and eliminating the need for manual maintenance.
When our oxygen shut-off valve is used on your oxygen pipeline, The oxygen shut -off valve has excellent explosion-proof and flame-retardant properties, which can effectively reduce safety risks during the operation of oxygen pipelines. and the sealing surface is made of stainless steel body processing or hard alloy welding. It is not prone to wear and friction, has good sealing performance, and there is no relative sliding between the valve disc and the sealing surface of the valve body during opening and closing.
The plunger valve of our Longz product is of interference fit. By adjusting the preload of the middle flange bolts, the lateral force generated by the compression of the sealing ring is balanced with the inner hole surface of the valve body and the outer circumference of the plunger, thus ensuring the sealing performance of the Plunger valve and eliminating external leakage.
- Size Chart for Globe Valves at Power Stations
- certificate
| (mm) | L | D1 | D2 | D3 | T1 | T2 | H |
|---|---|---|---|---|---|---|---|
| J61Y-200 | |||||||
| 15 | 120 | 15 | 22 | 40 | 10 | 6.5 | 210 |
| 20 | 170 | 20 | 27 | 40 | 10 | 6.5 | 242 |
| 25 | 180 | 25 | 34 | 52 | 10 | 6.5 | 257 |
| 32 | 180 | 32 | 42 | 52 | 10 | 6.5 | 257 |
| 40 | 250 | 40 | 48 | 79 | 14 | 10 | 295 |
| 50 | 250 | 49 | 61 | 79 | 14 | 10 | 305 |
| 65 | 340 | 63 | 74 | 97 | 14 | 10 | 559 |
| 80 | 390 | 74 | 89 | 114 | 15 | 13 | 698 |
| 100 | 480 | 97 | 115 | 144 | 16 | 15 | 757 |
| 125 | 500 | 122 | 142 | 177 | 18 | 16 | 918 |
| 150 | 600 | 146 | 168 | 212 | 20 | 17 | 1050 |
| 175 | 750 | 184 | 219 | 238 | 24 | 22 | 1100 |
| 200 | 950 | 194 | 219 | 277 | 24 | 22 | 1215 |
After receiving this power station globe valve, I conducted a water pressure test and found no leakage. There was no visible leakage at the connection between the valve seat and the valve cover. At the same time, the metal sealing pair was completely shut off on the superheated steam pipeline, in one go
EngineerBosnian Power PlantThe power station globe valve manufactured by Longz maintains reliable sealing performance at the valve seat after multiple start-stop thermal cycles, with a uniform contact band on the sealing surface. Repeated sealing tests conducted by an independent laboratory have yielded results that consistently meet the relevant standards.
EngineerWales Power Generation Company
The valve body material of this power station gate valve includes WCB, ZG15CrMo, ZG15CrIMolV, A217 WC6, and A217 WC9.
The applicable temperature range varies depending on the material type, which is approximately from -29°C to 570°C.
The valve stem is usually made of materials such as 20Cr13 and 15CrMo through heat treatment and surface nitriding, which possess excellent corrosion resistance and wear resistance. The packing is mostly made of 304 + flexible graphite.
Structure features of power station globe valve
The power station globe valve is suitable for various systems of thermal power plants. It can cut off or connect the pipeline medium. The applicable media include water, steam, and other non-corrosive media. Compared with other valve products, the unique feature of this power station globe valve is its high temperature and high pressure, as well as its distinctive self-sealing design. The higher the pressure, the more reliable the sealing. Due to the performance and technical characteristics as well as the special working conditions, this product has features that other products cannot replace. No friction during opening and closing: This function completely solves the problem of traditional valves being affected by friction between the sealing surfaces, which affects the sealing. The on-vehicle-mounted structure: For valves installed on pipelines, they can be directly inspected and maintained online, effectively reducing equipment downtime and costs. Single valve seat design: It eliminates the problem of abnormal pressure increase in the medium inside the valve chamber affecting the safety of use. Low torque design: The specially structured valve stem only requires a small handle to enable the valve to be easily opened and closed. Wedge-shaped sealing structure: The valve seals by pressing the valve stem wedge onto the valve seat, ensuring the sealing performance of the valve is not affected by changes in pipeline pressure difference in various working conditions. Self-cleaning structure of the sealing surface: When the ball is tilted away from the seat, the fluid in the channel passes uniformly along the sealing surface of the valve disc for 360 degrees. This not only eliminates the local scouring of the seat by high-speed fluid but also removes the accumulated substances on the sealing surface, achieving the purpose of self-cleaning.