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
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