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壓力自緊式閘閥（pressure seal）

壓力自緊式閘閥的閥蓋密封由內部壓力自身壓緊：約 Class 900 以上，管內介質的推力將壓力密封墊向外壓入閥蓋壓環，密封效果隨壓力提升而非退化——螺栓閥蓋結構在高壓等級無法比擬。系列涵蓋 DN50 至 DN400，Class 1500 至 Class 2500，材質矩陣寬廣（A105、F304/F316 及 L 級、F51/F53 雙相鋼、F11/F22、LCB），閥座為鈷鉻硬面合金堆焊或不鏽鋼，石墨/PTFE 填料，端接 RF/RTJ/BW/SW/NPT，操作為手輪或電動。測試依 API 598、DIN 3230、EN 12266 與 ISO 5208。

屬於閘閥系列

最後更新： 2026-11

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系列規格

Nominal valve connection size	DN50 to DN400
Pressure class / nominal rating designation	Class 1500 to Class 2500
Pressure class / nominal rating designation	Class1500 to Class2500
Valve body material	A105, F304, F316, F304L, F316L, F51, F53, F11, F22, LCB
Seat material	F6a + cobalt-chromium hardfacing alloy, SS304, SS304 + cobalt-chromium hardfacing alloy, SS316, SS304L, SS316L
Stem material	F6a, F304, F316, F3304L, F316L
Bonnet material	A105, F304, F316, F304L, F316L, F51, F53, F11, F22, LCB
End connection types	RF, RTJ, BW, SW, NPT
Operation / closure mode	Handwheel operated, Electric operated
Service temperature range	-196°C to 570°C
Design standards	API 602, BS5352, ASME B16.34
Design standards	API602, BS5352, ASME B16.34
Inspection and pressure-test standards	API 598, DIN 3230, EN 12266, ISO 5208
Face-to-face dimensional standard	ANSI B16.10, DIN3202, EN558-1, EN12982, ISO 5752
Packing Materials	Graphite, PTFE
kva design standards	API 600, ASME B16.34
kva size range	DN80 (3 inch) to DN400 (16 inch) across collected SKUs
kva size upper	DN400 (16 inch)
kva pressure class	Class 600 (PN100) to Class 2500 LB (PN420) across collected SKUs
kva pressure mid	Class 600 LB (PN100)
kva body materials	ASTM A216 WCB, ASTM A182 F304/F92, ASTM A351 CF8/CF8C, ASTM A217 WC6/WC9/C12A, 12Cr1MoV, 20CrMoV across collected SKUs
kva end connections	Butt weld (BW) and RTJ flanged ends across collected SKUs
kva operation	Bevel gear operated on selected SKUs
kwb size range	2 inches to 24 inches
kwb pressure class	Class 600 to Class 2500 LB
kwb body materials	ASTM A105N (also ASTM A105), ASTM A216 WCB across listed SKUs
kwb design standards	BS 5352, EN 558, API 6D across listed SKUs
kwc size range	2 to 36 inch (DN50 to DN900)
kwc pressure class	Class 150 to 900 (PN16 to PN150)
kwc temperature range	-29°C to +560°C
kwc end connections	RF, RTJ, BW
kwc design standards	Cast steel gate valve to API 600 (ISO 10434), API 6D; cast stainless steel gate valve to API 603, API 600
kwc testing standards	API 598, API 600 or API 6D
kwc flange standards	Flanges ASME B16.5 (NPS≤24) / ASME B16.47 Series A & B, API 605, MSS SP-44 (NPS＞24); BW ends ASME B16.25; face-to-face ASME B16.10; pressure-temperature ASME B16.34
kwc operation	Hand wheel, gear, electric actuator, etc.
kwc body materials	Carbon steel, stainless steel, alloy steel
kwc sku configuration	12 inch WCB SKU: full port, 900 lb working pressure, RF ends, working temp -29~425°C, gear box operated
kwc medium	Water, natural gas, oil and some corrosive liquid
yoke materials	A105, F304, F316, F304L, F316L, F51, F53, F11, F22, LCB
wedge materials	A105, F304, F316, F304L, F316L, F51, F53, F11, F22, LCB
gland materials	F6a, F304, F316, F3304L, F316L
seat ring materials	F6a+cobalt-chromium hardfacing alloy, SS304, SS304+cobalt-chromium hardfacing alloy, SS304, SS316, SS304L, SS316L
packing	Graphite, PTFE
gasket	SS304+ Graphite, SS316+Graphite
socketweld dimension	ANSI B16.11, JIS B2306
buttweld dimension	ASME B16.25, DIN 3239, EN12627
screwed dimension	ANSI B1.20.1
end to end	ANSI B16.5, EN1092, DIN2543, DIN2547