The main components are forged. Forged steel gate 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. The fully welded connection can also be used when customers have special requirements.
The middle cavity of 900Ib, 15001b, and 25001b adopts a pressure self-tightening seal structure. The sealing performance increases with the increase of internal pressure and has high reliability.
The channel is smooth, and the flow coefficient is small. The sealing surface is less eroded and eroded by the medium.
The sealing surface is made of alloy steel or hard alloy, which has good wear resistance and abrasion resistance.
Flexible graphite filler is used, the sealing is reliable, and the operation is light and flexible.
The flow direction of the medium is not restricted; there is no disturbance, and the pressure is not reduced.
The packing replacement and maintenance can be carried out in the state of online shutdown, which is convenient and fast without affecting
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, Taiwan gold steel
Nominal diameter: NPS1/4″~NPS3″ DN6~DN80
Pressure range: CL150 ~ CL2500 PN10~ PN420
Working temperature: -196°C~ +600°C
Application range: tap water, sewage, construction, petroleum, chemical industry, food, medicine, textile, electricity, shipbuilding, metallurgy, energy system, etc.
◎ Design standard: API 602/BS5352
◎ Structural length: Socket welding/threaded end forged steel gate valve structural length according to factory standard
◎ Flanged end/butt welding end forged steel gate valve 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 rating: ASME B16.34
Expanding Slab Gate Valve is a type of slide valve that utilizes parallel gate plates as its closing mechanism. These plates are equipped with a spreading mechanism to enhance functionality. The force pressing the plates against the valve seat is regulated by the medium pressure acting on either a floating gate plate or a floating valve seat. In dual gate flat gate valves, the inter-plate spreading mechanism provides additional pressing force. This valve is designed with innovative features including low operating torque, rapid actuation, minimal vibration, extended operational life, and enhanced safety. It is mainly used for the isolation or venting of gases and liquids in pipeline systems.
When the disc of the lift check valve slides along the vertical center line of the valve body and the medium flows forward, the disc is lifted by the fluid thrust and the medium passes smoothly; When the medium stops flowing or reverse flowing, the valve disc quickly closes under the action of its own gravity and the reverse thrust of the fluid to prevent the medium from flowing back. This valve is usually equipped with a guide sleeve to ensure that the disc remains smooth during lifting and accurately falls back onto the seat.
This product is a new type top entry combination ball valve,the seat can be installed and move around the body. Through the thread, the outer margin of the seat connected to the retainer ring. There is spring on the support cover, which installed on the valve body, and the retainer ring can compress spring.