CN108361423A - The electronic bellows angle type stop check valve of core level-one heavy caliber - Google Patents
The electronic bellows angle type stop check valve of core level-one heavy caliber Download PDFInfo
- Publication number
- CN108361423A CN108361423A CN201810366450.0A CN201810366450A CN108361423A CN 108361423 A CN108361423 A CN 108361423A CN 201810366450 A CN201810366450 A CN 201810366450A CN 108361423 A CN108361423 A CN 108361423A
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- Prior art keywords
- valve
- bellows
- flap
- deck
- heavy caliber
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/50—Preventing rotation of valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/10—Spindle sealings with diaphragm, e.g. shaped as bellows or tube
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
The electronic bellows angle type stop check valve of core level-one heavy caliber includes valve body, valve seat, valve deck, flap moving parts, valve rod, sylphon seal component, holder, electric device, buffer gear；The flap moving parts include flap, guide sleeve, rotation-preventing mechanism, and sylphon seal component includes bellows, graphite annulus, filler, spirotallic gasket；Valve seat is arranged in valve inner, valve deck is arranged on valve body, electric device is connect by holder with valve deck, buffer gear is arranged with valve rod in electric device, valve rod lower end is with bellows lower part by being welded to connect, stop pin sequentially passes through flap and guide sleeve, and guide sleeve top is bolted and is arranged check washer with ripple pipe holder bottom end, is bolted with valve deck underrun at bellows flange bracket.Flap modular construction with current stabilization, adjusting, non-return and cutoff function, regulating valve, check-valves and shut-off valve are melted into a whole, and reduce pipeline equipment and install raising system safety coefficient, save installation space inside nuclear island.
Description
Technical field
The present invention relates to the electronic bellows angle type stop check valves of core level-one heavy caliber, belong to nuclear power, thermoelectricity etc.
Valve field.
Background technology
Magnificent dragon No.1 technology is China in the accumulated experience of nuclear power design, construction, operation and research and development over more than 20 years, technology
On the basis of the talent, active response country calls, three generations's million kilowatt nuclear power technology with independent intellectual property right of research and development.
The electronic bellows angle type stop check valve of core level-one heavy caliber is mainly used for magnificent imperial No.1 nuclear power station RIS systems.In unusual service condition
Under accident conditions, it is able to carry out positive closing function and plays buffer action, the normal operation of valve can effectively ensure that system
Execute expected security function.
Invention content
In order to solve the above-mentioned problems of the prior art, the electronic bellows angie type of core level-one heavy caliber of the present invention stops
It returns valve and disclosure satisfy that normal operation under magnificent imperial No.1 nuclear power station RIS system condition parameters, the valve can not only be played with medium
Normal switch function is flowed, and under unusual service condition and accident conditions, is able to carry out positive closing function and plays buffer action.
The technical solution adopted by the present invention to solve the technical problems is the electronic bellows angie type cut-off of core level-one heavy caliber
Check-valves it include valve body, it is valve seat, valve deck, flap moving parts, valve rod, sylphon seal component, holder, electric device, slow
Punch mechanism；The flap moving parts include flap, guide sleeve, rotation-preventing mechanism, and stop pin is arranged in the rotation-preventing mechanism；Bellows
Seal assembly includes bellows, graphite annulus, filler, spirotallic gasket；Valve seat setting is arranged in valve inner, valve deck on valve body,
Lumen seal assembly is arranged with valve body junction in valve deck, and electric device is connect by holder with valve deck, and electric device connects valve rod
Buffer gear is arranged with valve rod in upper end, electric device, and with bellows lower part by being welded to connect, stop pin passes through spiral shell for valve rod lower end
Line is connected to stem lower portion, and sequentially passes through flap and guide sleeve, and guide sleeve and the setting of ripple pipe holder are oriented in valve inner
Set top is bolted and is arranged check washer with ripple pipe holder bottom end, and bellows cradle top connects with bellows-welding
It connects, is bolted with valve deck underrun at bellows flange bracket.
The flap is arranged between guide sleeve and valve rod, and gap is 0.25mm to 0.4mm between flap and guide sleeve；When
Valve rod is in the open position, and flap can be turned on and off with media flow, prevents medium reverse flow, and valve plays non-return at this time
Valve function；When valve rod is in the closed position, stem bottom is pressed on flap, overcomes medium positive pressure, and valve, which plays, at this time cuts
Only valve function；By controlling stem position, flap aperture is limited, flow regulating function is played.
Guide face is arranged in the flap bottom surface, plays the role of increasing flow and current stabilization.
The sylphon seal component includes bellows, graphite annulus, filler, spirotallic gasket, between valve rod and valve deck inner wall
Filler is set, Packing seat is set on filler, filler pressing sleeve is set on Packing seat, hold-down grid, filler spiral shell are set on filler pressing sleeve
Bolt is connect across hold-down grid with valve deck, and bellows is arranged between valve rod and valve body, and bellows bottom end connects with stem lower portion welding
It connects, bellows upper end is welded to connect with bellows pedestal upper end, and graphite annulus is arranged between ripple pipe holder and valve deck and passes through bolt
Connection is arranged spirotallic gasket and is bolted between valve deck and valve body.By sylphon seal component ensure valve body, valve deck and
Sealing between valve rod three ensure that the medium in valve does not leak out.
The buffer gear includes disc spring group, terminal pad, holder, adjust pad, valve stem nut, bearing, terminal pad and branch
Disc spring group is set between frame, and adjust pad is arranged in disc spring group top and bottom, and terminal pad is bolted with holder and pre-tightens disc spring
Group, valve stem nut top are driven with electric device by dental inlay, and valve stem nut setting is connected on valve rod head by trapezoidal thread
Transmission makes valve rod move up and down, and in the closed position in valve, disc spring group can absorb electric device inertial load and by valve
The stress loading that bar temperature change generates, is effectively protected sealing surface.
The valve body uses heavy caliber solid forging angie type structure, lumen to be equipped with annular groove.
Feature of the present invention：
1. using the flap modular construction with current stabilization, adjusting, non-return and cutoff function；
2. using bellows, the sylphon seal component of filler, graphite annulus and spirotallic gasket quadruple sealing structure, prevent outside medium
Leakage；
3. the stress loading for absorbing electric device inertial load using buffer gear and being generated by valve rod temperature change, is effectively protected
Sealing surface is protected；
4. valve body uses heavy caliber solid forging angie type structure, lumen to be equipped with annular groove, increases circulation area and improve valve flow；
Operation principle：By electric device driving stem nut, the linear motion for making to rise or fall with ovable valve stem is when valve rod exists
When open position, flap is detached with valve rod, and flap moves up and down between valve seat and valve rod with media flow, is played prevention and is situated between
Matter reverse flow acts on；When valve rod is in closed position, valve rod, which is pressed on flap, makes flap be bonded with valve seat, plays forced seal
Effect；Buffer gear is set between valve rod and electric device, it is in the closed position in valve, absorb electric device inertial load
With the stress loading generated by valve rod temperature change.
The beneficial effects of the invention are as follows：
1, the valve uses the flap modular construction with current stabilization, adjusting, non-return and cutoff function, by regulating valve, check-valves
It is melted into a whole with shut-off valve, reduces pipeline equipment and raising system safety coefficient is installed, save installation space inside nuclear island.
2, the valve uses buffer gear, the structure to can guarantee compensation and absorb the stress loading generated due to temperature change
With electric device inertial load.
3, the valve uses the sylphon seal component of bellows, filler, graphite annulus and spirotallic gasket quadruple sealing structure,
It prevents system media from leaking outside, improves system safety coefficient.
4, penetrability rotation-preventing mechanism is arranged in flap, valve rod and guiding inner room, avoids flap from rotating and tilt with medium and blocks
Dead phenomenon reduces abrasion and noise, so that flap is done vertical displacement movement and improves sealing reliability.
Description of the drawings
Fig. 1 is the front view of valve；
Fig. 2 is the left view of valve；
Fig. 3 is flap component diagram；
Fig. 4 is buffer gear schematic diagram；
Fig. 5 is sylphon seal component diagram；
In figure：1, valve body, 2, valve seat, 3, flap, 4, valve rod, 5, bellows, 6, guide sleeve, 8, check washer, 9, bellows branch
Frame, 10, spirotallic gasket, 12, middle flange bolt, 15, bolt, 17, graphite annulus, 18, valve deck, 19, filler, 20, filler pressure
Plate, 22, filler bolt, 24, block, 27, support bracket bolt, 30, electric device, 31, Denso bolt, 33, terminal pad, 34,
Valve stem nut, 35, adjust pad, 36, disc spring group, 37, disc spring sheath, 38, lubricating cup, 39, bearing, 40, holder, 41, bolt,
45, nut, 46, rotation-preventing mechanism.
Specific implementation mode
The present invention is described in detail below in conjunction with the accompanying drawings.
The electronic bellows angle type stop check valve of core level-one heavy caliber comprising valve body 1, valve seat 2, valve deck 18, flap fortune
Dynamic component, valve rod 4, sylphon seal component, holder 41, electric device 30 and buffer gear；The flap moving parts include
Flap 3, guide sleeve 6, rotation-preventing mechanism 46；Sylphon seal component includes bellows 5, graphite annulus 17, filler 19, spirotallic gasket
10；Valve seat 2 is arranged inside valve body 1, and valve deck 18 is arranged on valve body 1, and lumen sealing group is arranged with 1 junction of valve body in valve deck 18
Part, electric device 30 are connect by holder 40 with valve deck 18, and electric device 30 connects valve stem nut 34 upper end, electric device 30 with
Buffer gear is set between valve stem nut 34, and 4 upper end of valve rod and valve stem nut 34 connect transmission by trapezoidal thread, under valve rod 4
With 5 lower part of bellows by being welded to connect, rotation-preventing mechanism 46 is threadedly attached in 4 lower part of valve rod, and sequentially passes through flap 3 at end
With guide sleeve 6, guide sleeve 6 and ripple pipe holder 9 are arranged inside valve body 1, and 6 top of guide sleeve is logical with 9 bottom end of ripple pipe holder
It crosses and is bolted and is arranged check washer 8,9 top of ripple pipe holder is welded to connect with bellows 5,9 flange of ripple pipe holder
It is connected in 18 underrun bolt 15 of valve deck.
The sylphon seal component includes bellows 5, graphite annulus 17, filler 19, spirotallic gasket 10, valve rod 4 and valve deck
Filler 19 is set between 18 inner walls, hold-down grid 20 is set on filler 19, filler bolt 22 passes through hold-down grid 20 and valve deck 18
Bellows 5 is arranged in connection between valve rod 4 and valve body 1,5 bottom end of bellows connect with 4 lower weld of valve rod, 5 upper end of bellows and
6 upper end of ripple pipe holder is welded to connect, and graphite annulus 17 is arranged between ripple pipe holder 6 and valve deck 18 and is connected by bolt 15, valve
Spirotallic gasket 10 is arranged between lid 18 and valve body 1 to connect by middle flange bolt 12.Ensure valve body by sylphon seal component
1, the sealing between 4 three of valve deck 18 and valve rod, ensure that the medium in valve does not leak out.
The buffer gear includes disc spring group 36, terminal pad 33, holder 40, adjusting pad 35, valve stem nut 34, bearing 39,
Disc spring group 36 is set between terminal pad 33 and holder 40, and adjusting pad 35, terminal pad 33 and holder 40 is arranged in 36 top and bottom of disc spring group
Disc spring group 36 is connected and pre-tightened by bolt 26, and 34 top of valve stem nut is driven with electric device 30 by dental inlay, valve stem nut
34 settings make valve rod 4 move up and down on 4 head of valve rod by trapezoidal thread connection transmission, dish in the closed position in valve
The stress loading that spring group 36 can absorb 30 inertial load of electric device and be generated by 4 temperature change of valve rod, is effectively protected
Sealing surface.
Claims (7)
1. the electronic bellows angle type stop check valve of core level-one heavy caliber, it is characterised in that including valve body, valve seat, valve deck, flap
Moving parts, valve rod, sylphon seal component, holder, electric device, buffer gear；The flap moving parts include flap,
Stop pin is arranged in guide sleeve, rotation-preventing mechanism, the rotation-preventing mechanism；Sylphon seal component include bellows, graphite annulus, filler,
Spirotallic gasket；Valve seat setting is arranged in valve inner, valve deck on valve body, and lumen sealing group is arranged with valve body junction in valve deck
Part, electric device are connect by holder with valve deck, and electric device connects valve rod upper end, and buffer is arranged with valve rod in electric device
Structure, with bellows lower part by being welded to connect, stop pin is threadedly attached in stem lower portion, and sequentially passes through valve for valve rod lower end
In valve inner, guide sleeve top passes through spiral shell with ripple pipe holder bottom end for valve and guide sleeve, guide sleeve and the setting of ripple pipe holder
It tethers and connects and be arranged check washer, bellows cradle top is connect with bellows-welding, at bellows flange bracket and valve deck bottom
Face is bolted.
2. the electronic bellows angle type stop check valve of core level-one heavy caliber according to claim 1, it is characterised in that described
Flap is arranged between guide sleeve and valve rod, and gap is 0.25mm to 0.4mm between flap and guide sleeve；It is opened when valve rod is in
Position, flap can be turned on and off with media flow, prevent medium reverse flow, and valve plays return valve function at this time；Work as valve
Bar is in the closed position, and stem bottom is pressed on flap, overcomes medium positive pressure, and valve plays shut-off valve function at this time.
3. the electronic bellows angle type stop check valve of core level-one heavy caliber according to claim 1 or 2, it is characterised in that institute
The flap bottom surface setting guide face stated.
4. the electronic bellows angle type stop check valve of core level-one heavy caliber according to claim 1, it is characterised in that described
Sylphon seal component includes bellows, graphite annulus, filler, spirotallic gasket, and filler, filler are arranged between valve rod and valve deck inner wall
Filler pressing sleeve is arranged on Packing seat in upper setting Packing seat, and hold-down grid is arranged on filler pressing sleeve, and filler bolt passes through hold-down grid
Connect with valve deck, bellows be set between valve rod and valve body, bellows bottom end is welded to connect with stem lower portion, bellows upper end with
Bellows pedestal upper end is welded to connect, and graphite annulus is arranged between ripple pipe holder and valve deck and is bolted, valve deck and valve body
Between setting spirotallic gasket be bolted.
5. the electronic bellows angle type stop check valve of core level-one heavy caliber according to claim 1, it is characterised in that described
Buffer gear includes disc spring group, terminal pad, holder, adjust pad, valve stem nut, bearing, and dish is arranged between terminal pad and holder
Spring group, disc spring group top and bottom are arranged adjust pad, and terminal pad and holder are bolted and pre-tighten disc spring group, on valve stem nut
Portion is driven with electric device by dental inlay, and valve stem nut setting makes valve rod rise on valve rod head by trapezoidal thread connection transmission
Drop movement.
6. the electronic bellows angle type stop check valve of core level-one heavy caliber according to claim 1, it is characterised in that described
Sylphon seal component use bellows, filler, graphite annulus and spirotallic gasket quadruple sealing structure.
7. the electronic bellows angle type stop check valve of core level-one heavy caliber according to claim 1, it is characterised in that described
Valve body use heavy caliber solid forging angie type structure, lumen be equipped with annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810366450.0A CN108361423A (en) | 2018-04-23 | 2018-04-23 | The electronic bellows angle type stop check valve of core level-one heavy caliber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810366450.0A CN108361423A (en) | 2018-04-23 | 2018-04-23 | The electronic bellows angle type stop check valve of core level-one heavy caliber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108361423A true CN108361423A (en) | 2018-08-03 |
Family
ID=63009368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810366450.0A Pending CN108361423A (en) | 2018-04-23 | 2018-04-23 | The electronic bellows angle type stop check valve of core level-one heavy caliber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108361423A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578594A (en) * | 2018-12-17 | 2019-04-05 | 中国原子能科学研究院 | A kind of sodium medium regulating valve |
| CN111043319A (en) * | 2018-10-12 | 2020-04-21 | 中核苏阀科技实业股份有限公司 | Nuclear safety second-stage pneumatic stop valve |
| CN111043334A (en) * | 2018-10-12 | 2020-04-21 | 中核苏阀科技实业股份有限公司 | Nuclear safety first-stage pneumatic stop valve |
| CN112066015A (en) * | 2020-09-25 | 2020-12-11 | 杨新超 | High-pressure stop valve convenient to open and close |
| CN117090979A (en) * | 2023-10-20 | 2023-11-21 | 江苏广通船用阀门有限公司 | Bellows stop check valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104514890A (en) * | 2013-09-27 | 2015-04-15 | 中国石油化工集团公司 | Novel throttle valve |
| CN105370935A (en) * | 2015-11-24 | 2016-03-02 | 营口埃斯威特阀门有限公司 | Y-shaped stop-check valve |
| CN205155182U (en) * | 2015-11-27 | 2016-04-13 | 安徽杰克耐腐泵阀有限公司 | By dual -purpose valve of non return |
| CN205244514U (en) * | 2015-12-29 | 2016-05-18 | 吴江市东吴机械有限责任公司 | Mechanical type damping relief valve |
| WO2016169252A1 (en) * | 2015-04-22 | 2016-10-27 | 南通市天源阀门制造有限公司 | Integrated stop valve |
| CN207161860U (en) * | 2017-08-15 | 2018-03-30 | 西安广核阀门有限公司 | A kind of liquid metal special stop valve |
| CN208268488U (en) * | 2018-04-23 | 2018-12-21 | 大连大高阀门股份有限公司 | The one electronic bellows angle type stop check valve of seed nucleus level-one heavy caliber |
-
2018
- 2018-04-23 CN CN201810366450.0A patent/CN108361423A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104514890A (en) * | 2013-09-27 | 2015-04-15 | 中国石油化工集团公司 | Novel throttle valve |
| WO2016169252A1 (en) * | 2015-04-22 | 2016-10-27 | 南通市天源阀门制造有限公司 | Integrated stop valve |
| CN105370935A (en) * | 2015-11-24 | 2016-03-02 | 营口埃斯威特阀门有限公司 | Y-shaped stop-check valve |
| CN205155182U (en) * | 2015-11-27 | 2016-04-13 | 安徽杰克耐腐泵阀有限公司 | By dual -purpose valve of non return |
| CN205244514U (en) * | 2015-12-29 | 2016-05-18 | 吴江市东吴机械有限责任公司 | Mechanical type damping relief valve |
| CN207161860U (en) * | 2017-08-15 | 2018-03-30 | 西安广核阀门有限公司 | A kind of liquid metal special stop valve |
| CN208268488U (en) * | 2018-04-23 | 2018-12-21 | 大连大高阀门股份有限公司 | The one electronic bellows angle type stop check valve of seed nucleus level-one heavy caliber |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111043319A (en) * | 2018-10-12 | 2020-04-21 | 中核苏阀科技实业股份有限公司 | Nuclear safety second-stage pneumatic stop valve |
| CN111043334A (en) * | 2018-10-12 | 2020-04-21 | 中核苏阀科技实业股份有限公司 | Nuclear safety first-stage pneumatic stop valve |
| CN109578594A (en) * | 2018-12-17 | 2019-04-05 | 中国原子能科学研究院 | A kind of sodium medium regulating valve |
| CN109578594B (en) * | 2018-12-17 | 2023-09-29 | 中国原子能科学研究院 | Sodium medium regulating valve |
| CN112066015A (en) * | 2020-09-25 | 2020-12-11 | 杨新超 | High-pressure stop valve convenient to open and close |
| CN117090979A (en) * | 2023-10-20 | 2023-11-21 | 江苏广通船用阀门有限公司 | Bellows stop check valve |
| CN117090979B (en) * | 2023-10-20 | 2024-02-09 | 江苏广通船用阀门有限公司 | Bellows stop check valve |
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