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波紋管密封控制閥

波紋管密封控制閥以焊接金屬波紋管而非填料函密封閥桿，為危險、有毒或低逸散排放服務完全消除動態洩漏路徑——連零洩漏填料都不可接受的場合的選擇。產品範圍涵蓋 1/4 吋至 4 吋 NPS，壓力額定至 ASME Class 2500，材料為 SA 105 / SA 182-F22 / F91 / F92 / F316 鍛件，依 MSS SP-117 建造以確保波紋管壽命，配 6 層鎳鉻合金焊接波紋管閥桿密封、Y 型、角型與 T 型閥體、實心鈷鉻合金閥座與閥盤，以及電動、氣動或液動驅動，附件含鎖定裝置、單或雙限位開關、閥桿護罩、位置指示器與洩漏排放口。每組波紋管組件在殼體與閥座測試之前均經氦質譜零洩漏測試，超出 Method 21 逸散排放規程的要求。選型取決於排放控制要求、口徑/壓力點對鍛造閥體額定，以及閥體型式。

屬於控制閥系列

最後更新： 2026-11

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系列規格

Nominal valve connection size	1/4 inch through 4 inch NPS
Valve body material	SA 105, SA 182-F22, SA 182-F91, SA 182-F92, SA 182-F316
Design standards	MSS SP-117
Pressure Rating	Through ASME Class 2500
bellows seal	6-ply nickel-chromium alloy welded bellows stem seal
body styles	Y-pattern, Angle-pattern, T-pattern
seat disc materials	Solid cobalt-chrome seats and discs
accessories	Actuators – Electric, Pneumatic or Hydraulic, Locking Devices – Open, Closed or Both, Limit Switches – Single or Dual, Stem Shroud, Position Indicator, Leak-Off Port
Leakage test method / procedure	Helium gas mass spectrometer zero-leakage test on every bellows assembly, beyond Method 21 protocol
seal mechanism	metallic bellows welded to the stem and bonnet forms a hermetic primary seal; the bellows flexes with stem movement instead of sliding through packing
secondary sealing	backup gland packing (graphite or PTFE) provided in addition to the welded bellows
bellows material options	stainless steel, nickel-chromium alloy, special alloys
bellows cycle life	on the order of 10,000+ operating cycles before bellows replacement
emission compliance	EPA Method 21, TA-Luft, ISO 15848
emission certification	TA-Luft (VDI 2440) and ISO 15848-1 Class AH low fugitive emission compliance
control trim options	heavy guided plug, bellows sealed zero-leakage trim, and Y-pattern low pressure-drop bodies
typical services	toxic and hazardous chemical media, steam systems and feedwater circuits, thermal oil, vacuum service, cryogenic fluids with suitable bellows material
maintenance profile	no regular packing adjustment required; the metal bellows maintains sealing integrity without adjustment
bellows life cycle control duty	under standard control valve conditions the metal bellows life can commonly exceed 5,000,000 cycles (stroke motion between defined travel positions)
iso15848 cycle test record	bellows design successfully tested over 100,000 cycles according to ISO 15848 with leakage rate tightness class AH per ISO 15848 (helium test)
bellows base material 316ti	standard bellows material 316Ti stainless steel, with various special alloys available for corrosive applications
bellows cavity test port	threaded test connection between the bellows and the packing allows cavity pressure monitoring before external leakage is visible
bellows retrofit and jacket option	modular bellows design retrofits easily into existing valves when new stricter emissions requirements apply; optional full body heating jacket prevents crystalline deposits in the folds of the metal bellows
bellows zero hysteresis	metal bellows stem sealing introduces no hysteresis: no deviations from the valve characteristic
emission standard coverage	bellows emission limits specified per TA Luft, ISO 15848 and ANSI/FCI 91-1-2010
hazardous duty size class envelope	hazardous-chemical bellows seal globe control valves in sizes 1 to 12 inch (DN 25 to DN 300); end connections CL150, CL300, CL600, PN16, PN25, PN40; cast body materials A352 LCC carbon steel, A351 CF8M stainless steel, A494 M35-1 nickel-copper, CW12MW nickel-chrome-moly-tungsten and CY40 nickel-chrome-iron
bellows ply construction	two or three ply UNS N10276 bellows with UNS N10276 end rings; open bellows design allows examination and prevents bellows damage from trapped corrosion products
open bellows maintenance design	open bellows design gives ease of examination and maintenance with no bellows damage due to trapped corrosion products
control trim stage options	contoured, single-stage and multi-stage cage trim options covering noisy gas and flashing/cavitating liquid duties
bellows cycle guarantee gest	bellows guaranteed for at least 100,000 open/close/open cycles per the Euro Chlor GEST 17/492 requirement
hazardous duty flow characteristics	flow characteristics linear, equal percentage and specials
isa face to face series	face-to-face dimensions per ISA-75.08.01-2002: Class 150 series 37, Class 300 series 38, Class 600 series 39
auxiliary packing design	spring-loaded five-ring PTFE chevron auxiliary stuffing box packing set requiring no routine maintenance; leak detection tapping to the inter space between bellows seal and auxiliary gland available as an option
trim seat hardfacing	replaceable trim with hard-faced (stellited) sealing surface as standard, soft seal seat available as option; plug pinned to stem to ensure repeatable flow control
testing requirements hazardous duty	all testing performed to the requirements of the latest Euro Chlor GEST 17/492, ASME B16.34 and ANSI/FCI 70.2
bellows welding process	metallic bellows welded between bonnet and stem by automatic roll welding technology, giving zero leakage at the stem sealing area during operation
large size stabilizer device	triangular stabilizing (anti-vibration) device installed for sizes DN150 and above to protect internal components from vibration, reduce noise and improve structural strength
disc configuration options bs	disc configurations selected per operating condition, including regulating disc, globe-check disc and soft-seal disc options
mark74 lab cycle life	in lab tests, the Mark 74 exceeded 2 million cycles with no bellows failure
mark74 short stroke bellows	a valve stroke that is just a fraction of that of other rising stem valves
mark74 backup packing chamber	A secondary chamber of multiple packing rings provides extra leakage protection
mark74 bellows monitoring port	a gauge can be mounted to verify bellows performance
mark74 approvals envelope	1/2′′ – 2′′, ATEX Certified
mark74 hazardous media scope	reducing the risks associated with toxic, corrosive, explosive and high temperature fluids
bellows double seal design	DIN/EN bellows executions use a double seal design: the welded bellows is the primary stem seal and backup stem packing contains the leak if the bellows fails
din bellows multiply welded	DIN/EN bellows executions feature a formed multi-ply bellows welded to the stem and to the bottom of the bonnet, creating a hermetic seal or impermeable barrier
gas service ptfe soft seat option	a PTFE soft-seat option is offered for gas media to improve tightness
cone seal up to 400c	a cone seal seat is used at temperatures up to 400°C to achieve zero leakage sealing performance
din execution design standard	DIN bellows globe executions are designed to EN 13709
din execution face to face series	face-to-face dimensions per EN 558-1
din execution flange standards	end flanges per EN 1092-1; butt-welding ends per EN 12627
din execution testing standard	inspection and test per EN 12266-1
din execution size range	size range DN15-DN400 for the DIN bellows globe execution
din execution pressure rating	pressure ratings PN16, PN25 and PN40
din execution temperature range	temperature range -10°C to 400°C
din execution body materials	GS-C25 cast carbon steel body execution
din execution body material options	cast steel, stainless steel, special alloy, cast iron and ductile iron body options available for the DIN bellows globe line
din3356 design execution	a cast iron bellows-seal globe execution is built to DIN 3356
din3202 f1 face to face	the DIN 3356 cast iron execution uses face-to-face dimensions per DIN 3202-F1
din2532 2533 flange standard	the DIN 3356 cast iron execution uses flange ends per DIN 2532/DIN 2533
din execution cast iron envelope	cast iron GG25 DIN 3356 execution envelope: DN15-DN250, PN16, handwheel operated
din execution bellows material options	316Ti / 321 stainless steel bellows material options in the DIN 3356 GS-C25 execution
din execution stem materials	stem material options SS420 / SS431
din execution seat materials	seat with stainless steel overlay
din execution wide temperature range	operating temperature -29°C to 400°C for the DIN 3356 GS-C25 PN16 execution
din execution zero visible leakage	leakage class: zero visible leakage at the stem seal
din execution actuation	handwheel operation standard; electric and pneumatic actuation optional
din en leakage rate class a	EN bellows executions are tested to leakage rate A per EN 12266-1 with face-to-face per EN 558-1 series 1 (F1) and EN 1092-1 flanges
din execution bellows material tistabilized	Ti-stabilized 316 grade X6CrNiMoTi17-12-2 bellows with 1.4021 (X20Cr13) stem and graphite packing rings in the EN 558-1 series 1 (F1) steel execution
din execution steel body trim materials	steel execution: body in 1.0619 (GP240GH), disc/cone in 1.4021 (X20Cr13 + QT), stem 1.4021 (X20Cr13), stainless steel seat, graphite packing rings
din execution cast iron variant	PN16 cast iron variant of the same bellows globe line: body EN-GJL-250 grey cast iron with EN 1092-2 flanges, same 1.4021 trim and X6CrNiMoTi17-12-2 bellows, graphite packing
moq	1 set
lead time	15 to 30 days
warranty	18 months