The main components are forged. Forged steel stop valves have three types of middle cavity seals: bolted bonnet, welded bonnet, and
middle cavity pressure self-tightening seal structure.
A bolted bonnet means that the valve body and bonnet are connected with bolts and nuts and sealed with a wound gasket (made of stainless steel wire clips and flexible graphite). Metal ring connection can also be used when customers have special requirements.
Welded bonnet means that the valve body and bonnet are connected with threads and fully welded. A full penetration connection can also be used when customers have special requirements.
The middle cavity of 9001b, 1500Ib, 2500Ib, and 45001b can also adopt a pressure self-tightening seal structure. The sealing performance
increases with the increase of internal pressure and has high reliability.
The medium channel in the valve body is tortuous, the fluid resistance is large, and the power consumption is large.
The sealing surface is not easy to wear and scratch and has good sealing performance. There is no relative sliding between the valve disc
and the sealing surface of the valve body when opening and closing, so the wear and scratch are not serious, the sealing performance is
good, and the service life is long.
Flexible graphite packing is used, the sealing is reliable, and the operation is light and flexible.
The medium of the stop valve can only flow in one direction and cannot change the flow direction. During installation, pay attention to the
direction of the medium flow and the direction of the arrow on the valve body.
The packing replacement and maintenance can be carried out in a state of shutdown, which is convenient and quick and does not affect the operation of the system.
The shape is simple, the structure length is short, the manufacturing process is good, and the application range is wide.
Main material: carbon steel, stainless steel, alloy steel
Nominal diameter: NPS1/4”~NPS3” DN6~DN80
Pressure range: Cl150~CL4500 PN10 ~ PN760
Working temperature: -196℃ ~ +600℃
Application range: tap water, sewage, construction, petroleum, chemical industry, food, medicine, textile, electricity, metallurgy, energy system, etc.
◎ Design standard: API 602/BS5352
◎ Structural length: Socket welding threaded end riveted structural length according to factory standard
◎ Flanged end butt welding end hoeing net according to ASME B16.10
◎ Connection standard: ASME B16.11, ASME B1.20.1, ASME B16.5, ASME B16.25
◎ Wall thickness standard: API 602
◎ Pressure test: API 602, API 598
◎ Pressure and temperature level: ASME B16.34
Designed specifically for industrial ventilation and gas transportation systems, it features a high-strength carbon steel or stainless steel valve body, equipped with a low-torque sealing structure, enabling efficient regulation of large flow of gas media. The optimized butterfly plate design is combined with wear-resistant sealing rings, ensuring reliable performance under harsh conditions such as high temperatures and dust. It is suitable for ventilation and dust removal systems in industries such as power plants, metallurgy, and chemical engineering
Designed specifically for deep cold medium working conditions such as LNG, liquid nitrogen, and liquid oxygen, it adopts special stainless steel or low-temperature alloy valve bodies. Through deep cold treatment, it ensures reliable sealing even in an extreme environment of -196℃. The innovative lateral maintenance port structure allows for quick replacement of the sealing components without disassembling the valve, significantly improving maintenance efficiency. The optimized double eccentric butterfly plate, combined with multi-level metal hard seals, achieves zero leakage and long service life under ultra-low temperature conditions. At the same time, it is equipped with a longened valve stem heat insulation structure, effectively blocking the conduction of cold energy.
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.