The national standard gate valve is suitable for use in pipelines in various industries such as petroleum, chemical engineering, pharmaceuticals, fertilizers, and power, with a nominal pressure ranging from PN1.6 to PN6.4 MPa and a working temperature ranging from -29 to 600℃. It is used to cut off or connect the pipeline medium and cannot be used for regulation or throttling. The applicable media for the national standard gate valve include water, oil products, steam, acidic media, etc. Common driving methods include manual, gear-driven, and electric.
● Compact structure, reasonable design, good valve rigidity, smooth flow channel, and low flow coefficient.
● The sealing surface is made of stainless steel and hard alloy, with long service life.
● Using flexible graphite packing, the sealing is reliable and the operation is convenient and flexible.
● The driving methods include manual, pneumatic, electric and gear transmission.
● The structural forms include elastic wedge type single gate plate, rigid wedge type single gate plate, and double gate plate type.
● The design standard adopts GB/T 12234
● The structural length standard adopts GB/T 12221
● The test and inspection standards adopted are GB/T 13927 and JB/T 9092
● The standard for the connection flange is: GB/T 9113, JB/T 79, HG20592
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