CN107725795A - PRATT large-diameter butterfly valve valve seat insert replacing options - Google Patents
PRATT large-diameter butterfly valve valve seat insert replacing options Download PDFInfo
- Publication number
- CN107725795A CN107725795A CN201710778163.6A CN201710778163A CN107725795A CN 107725795 A CN107725795 A CN 107725795A CN 201710778163 A CN201710778163 A CN 201710778163A CN 107725795 A CN107725795 A CN 107725795A
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- Prior art keywords
- valve seat
- injecting glue
- pratt
- glue
- seat insert
- Prior art date
- 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.)
- Granted
Links
- 239000003292 glue Substances 0.000 claims abstract description 80
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 10
- 229920005989 resin Polymers 0.000 claims description 19
- 239000011347 resin Substances 0.000 claims description 19
- 239000003822 epoxy resin Substances 0.000 claims description 13
- 229920000647 polyepoxide Polymers 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 6
- 239000004593 Epoxy Substances 0.000 claims description 4
- 244000137852 Petrea volubilis Species 0.000 claims description 3
- 229940106691 bisphenol a Drugs 0.000 claims description 3
- 210000000080 chela (arthropods) Anatomy 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 239000012634 fragment Substances 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 210000002445 nipple Anatomy 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 238000010926 purge Methods 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 230000002269 spontaneous effect Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000003111 delayed effect Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000011160 research Methods 0.000 abstract description 3
- 238000011161 development Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 4
- 230000008439 repair process Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- 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
- F16K1/16—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 with pivoted closure-members
- F16K1/18—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 with pivoted closure-members with pivoted discs or flaps
- F16K1/22—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 with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
- F16K1/2263—Shaping or arrangements of the sealing the sealing being arranged on the valve seat
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B11/00—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding
- F16B11/006—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding by gluing
Abstract
The invention belongs to power station operating maintenance technical field, more particularly to a kind of PRATT large-diameter butterfly valves valve seat insert replacing options, purpose is to research and develop the valve seat insert replacing technology of heavy caliber PRATT butterfly valves, problem can not be repaired by solving such large-diameter butterfly valve equipment country of three factories, spare parts purchasing and site examining and repairing cost are saved, meets work on the spot demand.It is characterized in that：The step of it is including the air test before clearing up old valve seat, equipped valve seat, injecting glue, injecting glue and dress watch.Repaired from PRATT butterfly valve seats sealing ring after changing technological development success, successively amount to and successfully repaired about 130 Taiwan Straits water system PRATT large-diameter butterfly valves, save equipment purchase fund more than about 50,000,000 yuan.
Description
Technical field
The invention belongs to power station operating maintenance technical field, and in particular to a kind of PRATT large-diameter butterfly valves valve seat insert
Replacing options.
Background technology
The factory's sea water service system heavy caliber PRATT butterfly valves of the Qin three are manufactured for HENRY PRATT companies of the U.S., dimensions master
Have 42 ", 54 ", 90 " and 108 ", two unit equipment total numbers are 72.Because system arrangement, valve its structural design,
The composite factor such as in-site installation mode and three phases severe briny environment influences, and causes this kind of large-diameter butterfly valve equipment in scene big
Part premature failure, scene need timely repair process.
In view of the factor such as site examining and repairing environment and equipment deficiency processing requirement, general all take in scene directly changes entirety
Spare part is come the defect elimination at the scene of completing.For many years, scene is replaced such number of devices to get off and has been on the increase.Because of these equipment
Purchase cost very high (every equipment purchase expense be 40 to 2,000,000 yuan or so) is, it is necessary to implement repair process, extension device
Service life, save spare parts purchasing expense.
Three factory's sea water service system large-diameter butterfly valves are that the Triton-XR70 series of Henry Pratt companies of U.S. design is single inclined
The heart, line with rubber, soft seal electric butterfly valve (referring to Fig. 1), primary structure include valve seat 1, butterfly plate 2, valve rod 3, distribution 4 and valve body 5.Should
Kind equipment valve seat insert uses E-LOK Seal Designs, and rubber valve seat sealing ring is hollow design, overall structure for it is semicircle,
Surface is designed with multiple tooth seal line.After the sealing ring is installed in the dovetail groove of valve seat, sealing ring is entered by injecting special glue
Row is fixed, and reaches the installation requirement of the valve seat insert (referring to Fig. 2) using some technical characterstics after special adhesive curing.
Reparation for such valve, we face the replacing that main difficulty is exactly valve seat insert, and for correlation
Special glue composition and performance and sealing ring change concrete operation method etc., and Pratt companies implement technology blockage.
The numerous heavy caliber PRATT butterfly valves equipment changed can be implemented effectively to repair to solve three factories, save scene
The cost of overhaul thoroughly breaks technology outside producer of state, it is necessary to research and develop the valve seat insert replacing technology of such heavy caliber PRATT butterfly valves
Block, meet three factory's work on the spot demands.
The content of the invention
The purpose of the present invention is to research and develop the valve seat insert replacing technology of heavy caliber PRATT butterfly valves, and solving three factories, such is big
The bore butterfly valve equipment country can not repair problem, save spare parts purchasing and site examining and repairing cost, meet work on the spot demand.
What the present invention was realized in：
A kind of PRATT large-diameter butterfly valves valve seat insert replacing options, specifically comprise the following steps：
Step 1：Clear up old valve seat
Step 1.1：Horizontal positioned valve body, and make sealing surface of seat one end upward, butterfly plate is opened, removes old valve seat；
Step 1.2：Scrap rubber and valve seat fragment are cleared up, valve seat mounting groove is kept clean；
Step 1.3：Hole for injecting glue and the tapping of two injecting glues are symmetrically bored in valve flange plane；
Step 1.4：With sand paper polishing valve seat mounting groove, the inwall top layer of groove is set to expose matrix and scrub；
Step 2：Equipped valve seat
Step 2.1：Valve seat is clamped with rubber pincers, valve seat mounting groove is squeezed into, squeezes into valve seat in 180 ° of directions of face, use simultaneously
Rubber hammer beats valve seat, feeds them into predetermined size range；
Step 2.2：Valve seat is progressively got on point both sides, is tapped valve seat with rubber hammer, is allowed to fully enter valve seat mounting groove；
Step 2.3：Butterfly plate is closed, adjusts the center of butterfly plate so that the cylindrical distance phase between body cavity of butterfly plate
Unanimously, while check whether butterfly plate is completely closely sealed with valve seat；
Step 3：Air test before injecting glue
Step 3.1：Connect test pipeline, regulation test bleed pressure；
Step 3.2：A pipe nipple is closed, a hole for injecting glue is blocked, is slowly filled from another hole for injecting glue to valve seat mounting groove
Gas, while all-round length checks whether gas leakage, adjustment valve seat is gently shaken with rubber hammer, it is ensured that valve base cavity is fully sealed；
Step 3.3：Progressively boosting makes valve seat insert fully outwardly against butterfly plate；
Step 4：Special glue is modulated
From bisphenol-A epoxy type resin glue and complete curing agent, epoxy resin and curing agent carry out 60 DEG C of bakings simultaneously
More than 2.5 hours；
To be subject to sufficiently stirring in modulation, with the air in epoxy resin of draining, after resin glue color is uniform, to pour into
Injecting glue is carried out in injecting glue tank；
Step 5：Injecting glue
Step 5.1：Compressed air purging valve seat insert inner chamber is first used, keeps clean injecting glue again；
Step 5.2：When starting injecting glue, using injecting glue instrument, into a hole for injecting glue, injecting glue, initial injection pressure are
0.3MPa, keep injection pressure stable, follow-up injection pressure is in 0.5~0.6MPa, until another hole for injecting glue flows out asphalt mixtures modified by epoxy resin
Untill fat；
Step 5.3：Resin glue confirms to discharge without air, closes another hole for injecting glue, delay after another hole for injecting glue extrusion
Slow lifting injection pressure checks whether there is resin leakage around valve seat insert, and confirm that valve seat insert is expanded into 0.7MPa
Position；
Step 5.4：Butterfly plate is closed, but retains certain aperture；
Step 5.5：Pressure is unloaded down, 0.3MPa is dropped to and keeps stable, allow resin glue slowly to solidify；
Step 5.6：The injecting glue instrument of correlation is pulled down, and continues spontaneous curing at least 12 hours；
Step 6：Dress watch
After the work of valve seat insert injecting glue is fully completed, opens butterfly plate and check whether valve seat insert is installed with valve seat completely
Groove fixes bonding, and cleaning removes the foreign matter on valve seat insert surface.
The mass ratio of step 4 as described above, curing agent and epoxy resin is 1：6.
Step 5 as described above, injecting glue time are 20 minutes.
Step 5.4 as described above, butterfly plate aperture are controlled between 2 °~5 °.
Step 5.5 as described above, the setting time of resin glue is 20~24 hours.
The beneficial effects of the invention are as follows：
Repaired from PRATT butterfly valve seats sealing ring after changing technological development success, successively amount to and successfully repaired about 130
Taiwan Straits water system PRATT large-diameter butterfly valves, save equipment purchase fund more than about 50,000,000 yuan.
Brief description of the drawings
Fig. 1 is the structural representation of PRATT large-diameter butterfly valves；
Fig. 2 is the sealing ring mounting structure schematic diagram of PRATT large-diameter butterfly valves.
Wherein：1. valve seat, 2. butterfly plates, 3. valve rods, 4. promote, 5. valve bodies, 6. valve flanges, 7. hole for injecting glue, 8. valve seats peace
Tankage, 9. valve seat inserts.
Embodiment
The present invention is described further with reference to the accompanying drawings and examples.
A kind of PRATT large-diameter butterfly valves valve seat insert replacing options, specifically comprise the following steps：
Step 1：Clear up old valve seat
Step 1.1：Horizontal positioned valve body 5, and make sealing surface of seat one end upward, butterfly plate 2 is opened, removes old valve seat 1.
Step 1.2：Scrap rubber and valve seat fragment are cleared up, valve seat mounting groove 8 is kept clean, should avoid damaging valve seat during work
The surface of mounting groove 8.
Step 1.3：Hole for injecting glue 7 and the tapping of two injecting glues are symmetrically bored in the plane of valve flange 6.
Step 1.4：With sand paper polishing valve seat mounting groove 8, the inwall top layer of groove is set to expose matrix and scrub.
Step 2：Equipped valve seat
Step 2.1：Valve seat 1 is clamped with rubber pincers, valve seat mounting groove 8 is carefully squeezed into, valve seat is squeezed into 180 ° of directions of face
1, while valve seat 1 is beaten with rubber hammer, feed them into predetermined size range.
Step 2.2：Valve seat 1 is progressively got on point both sides, is tapped valve seat 1 with rubber hammer, is allowed to fully enter valve seat mounting groove
8。
Step 2.3：Butterfly plate 2 is closed, adjusts the center of butterfly plate 2, upper lower deviation will be controlled, that is to say, that butterfly plate 2
Distance between the cylindrical inner chamber with valve body 5 to be adjusted consistent, while checks whether butterfly plate 2 is completely closely sealed with valve seat 1.
Step 3：Air test before injecting glue
Step 3.1：Connect test pipeline, regulation test bleed pressure.
Step 3.2：A pipe nipple is closed, blocks a hole for injecting glue 7, it is slow from another hole for injecting glue 7 to valve seat mounting groove 8
Inflation, while all-round length checks whether gas leakage, and adjustment valve seat 1 is gently shaken with rubber hammer, closes source of the gas if necessary and readjusts
Valve seat 1, it is ensured that the inner chamber of valve seat 1 is fully sealed.
Step 3.3：Progressively boosting makes valve seat insert 9 fully outwardly against butterfly plate.
Step 4：Special glue is modulated
From the bisphenol-A epoxy type resin glue of correlation, i.e. 0164 epoxy resin and complete curing agent, epoxy resin and solid
Agent carries out 60 DEG C and toasted more than 2.5 hours simultaneously, and according to current weather conditions, modulates appropriate mass ratio and adjusted
With epoxy resin.The mass ratio general control of curing agent and epoxy resin is 1：6.
To be subject to sufficiently stirring in modulation, with the air in epoxy resin of draining, after resin glue color is uniform, to pour into
Injecting glue is carried out in injecting glue tank, the injecting glue time must complete at 20 minutes.
Step 5：Injecting glue
Step 5.1：The inner chamber of compressed air purging valve seat insert 9 is first used, keeps clean injecting glue again.
Step 5.2：When starting injecting glue, using injecting glue instrument, into a hole for injecting glue 7, injecting glue, initial injection pressure are
0.3MPa, keep injection pressure stable, mitigation, unsuitable too fast, follow-up injection pressure keeps stable, air pressure 0.5~
0.6MPa, untill another hole for injecting glue 7 flows out epoxy resin.
Step 5.3：Resin glue confirms to discharge without air, closes another hole for injecting glue 7 after another hole for injecting glue 7 extrusion,
Slowly lifting injection pressure checks whether there is resin leakage around valve seat insert 9, and confirm that valve seat insert 9 is swollen to 0.7MPa
It is swollen in place.
Step 5.4：Butterfly plate 2 is closed, but retains certain aperture.Different according to valve size specification, corresponding butterfly plate is opened
Degree is also different, and for the PRATT butterfly valves of theme, the aperture general control of butterfly plate 2 now is between 2 ° -5 °.
Step 5.5：Pressure is unloaded down, 0.3MPa is dropped to and keeps stable, allow resin glue slowly to solidify.According at that time
Environment temperature is different, and the setting time of resin glue is almost between 20~24 hours.
Step 5.6：After 24 hours, the injecting glue instrument of correlation is pulled down, and continues spontaneous curing at least 12 hours.
Step 6：Dress watch
After the work of the injecting glue of valve seat insert 9 is fully completed, opens butterfly plate 2 and check valve seat insert 9 whether completely and valve seat
Mounting groove 8 fixes bonding, and cleaning removes the foreign matter on the surface of valve seat insert 9.
Described above is only the preferred embodiments of the invention, is illustrated herein：Method based on the principle of the invention improve and
Structural adjustment, it all will be regarded as protection scope of the present invention.
Claims (5)
1. a kind of PRATT large-diameter butterfly valves valve seat insert replacing options, specifically comprise the following steps：
Step 1：Clear up old valve seat
Step 1.1：Horizontal positioned valve body (5), and make sealing surface of seat one end upward, butterfly plate (2) is opened, removes old valve seat
(1)；
Step 1.2：Scrap rubber and valve seat fragment are cleared up, valve seat mounting groove (8) is kept clean；
Step 1.3：Hole for injecting glue (7) and the tapping of two injecting glues are symmetrically bored in valve flange (6) plane；
Step 1.4：With sand paper polishing valve seat mounting groove (8), the inwall top layer of groove is set to expose matrix and scrub；
Step 2：Equipped valve seat
Step 2.1：Valve seat (1) is clamped with rubber pincers, valve seat mounting groove (8) is squeezed into, valve seat (1) is squeezed into 180 ° of directions of face,
Valve seat (1) is beaten with rubber hammer simultaneously, feeds them into predetermined size range；
Step 2.2：Valve seat (1) is progressively got on point both sides, is tapped valve seat (1) with rubber hammer, is allowed to fully enter valve seat mounting groove
(8)；
Step 2.3：Close butterfly plate (2), the center of adjustment butterfly plate (2) so that butterfly plate (2) is cylindrical between valve body (5) inner chamber
Distance it is consistent, while check butterfly plate (2) whether with valve seat (1) completely it is closely sealed；
Step 3：Air test before injecting glue
Step 3.1：Connect test pipeline, regulation test bleed pressure；
Step 3.2：A pipe nipple is closed, blocks a hole for injecting glue (7), is delayed from another hole for injecting glue (7) to valve seat mounting groove (8)
Trickle charge gas, while all-round length checks whether gas leakage, adjustment valve seat (1) is gently shaken with rubber hammer, it is ensured that valve seat (1) inner chamber is complete
Sealing；
Step 3.3：Progressively boosting makes valve seat insert (9) fully outwardly against butterfly plate；
Step 4：Special glue is modulated
From bisphenol-A epoxy type resin glue and complete curing agent, epoxy resin and curing agent 60 DEG C of bakings 2.5 of progress simultaneously are small
When more than；
To be subject to sufficiently stirring in modulation and, with the air in epoxy resin of draining, after resin glue color is uniform, pour into injecting glue
Injecting glue is carried out in tank；
Step 5：Injecting glue
Step 5.1：Compressed air purging valve seat insert (9) inner chamber is first used, keeps clean injecting glue again；
Step 5.2：When starting injecting glue, it is to an interior injecting glue of hole for injecting glue (7), initial injection pressure using injecting glue instrument
0.3MPa, keep injection pressure stable, follow-up injection pressure is in 0.5~0.6MPa, until another hole for injecting glue (7) flows out epoxy
Untill resin；
Step 5.3：Resin glue confirms to discharge without air, closes another hole for injecting glue (7) after another hole for injecting glue (7) extrusion,
Slowly lifting injection pressure checks whether there is resin leakage around valve seat insert (9), and confirm valve seat insert to 0.7MPa
(9) expand in place；
Step 5.4：Butterfly plate (2) is closed, but retains certain aperture；
Step 5.5：Pressure is unloaded down, 0.3MPa is dropped to and keeps stable, allow resin glue slowly to solidify；
Step 5.6：The injecting glue instrument of correlation is pulled down, and continues spontaneous curing at least 12 hours；
Step 6：Dress watch
After the work of valve seat insert (9) injecting glue is fully completed, opens butterfly plate (2) and check valve seat insert (9) whether completely and valve
The fixed bonding of seat mounting groove (8), cleaning remove the foreign matter on valve seat insert (9) surface.
2. PRATT large-diameter butterfly valves valve seat insert replacing options according to claim 1, it is characterised in that：Described
The mass ratio of step 4, curing agent and epoxy resin is 1：6.
3. PRATT large-diameter butterfly valves valve seat insert replacing options according to claim 1, it is characterised in that：Described
Step 5, injecting glue time are 20 minutes.
4. PRATT large-diameter butterfly valves valve seat insert replacing options according to claim 1, it is characterised in that：Described
Step 5.4, the control of butterfly plate (2) aperture is between 2 °~5 °.
5. PRATT large-diameter butterfly valves valve seat insert replacing options according to claim 1, it is characterised in that：Described
Step 5.5, the setting time of resin glue is 20~24 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710778163.6A CN107725795B (en) | 2017-09-01 | 2017-09-01 | PRATT large-diameter butterfly valve valve seat insert replacing options |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710778163.6A CN107725795B (en) | 2017-09-01 | 2017-09-01 | PRATT large-diameter butterfly valve valve seat insert replacing options |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107725795A true CN107725795A (en) | 2018-02-23 |
| CN107725795B CN107725795B (en) | 2019-08-13 |
Family
ID=61204925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710778163.6A Active CN107725795B (en) | 2017-09-01 | 2017-09-01 | PRATT large-diameter butterfly valve valve seat insert replacing options |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107725795B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109079701A (en) * | 2018-09-21 | 2018-12-25 | 上海沪东造船阀门有限公司 | A kind of butterfly valve seal circle pre-assembled auxiliary tool and its method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5975494A (en) * | 1995-10-12 | 1999-11-02 | Orbit Valve Company | Replaceable seal members for butterfly valve |
| CN1409037A (en) * | 2001-09-25 | 2003-04-09 | 上海冠龙阀门机械有限公司 | Composite elastic soft sealing |
| CN101451626A (en) * | 2008-12-30 | 2009-06-10 | 广东联塑市政工程管道有限公司 | Method for replacing valve sealing filler |
| CN202100740U (en) * | 2011-06-08 | 2012-01-04 | 无锡市宝牛阀业有限公司 | Three-eccentric sealing butterfly valve |
| CN202252028U (en) * | 2011-09-21 | 2012-05-30 | 铁岭方众阀门有限公司 | Metal-rubber sealing sub butterfly valve |
| EP2657582A1 (en) * | 2012-04-27 | 2013-10-30 | Metso Automation MAPAG GmbH | Shut-off valve with a shut-off disc with a rotating bearing |
| CN203656229U (en) * | 2013-11-15 | 2014-06-18 | 浙江时代铸造有限公司 | Butterfly plate device for butterfly valve |
-
2017
- 2017-09-01 CN CN201710778163.6A patent/CN107725795B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5975494A (en) * | 1995-10-12 | 1999-11-02 | Orbit Valve Company | Replaceable seal members for butterfly valve |
| CN1409037A (en) * | 2001-09-25 | 2003-04-09 | 上海冠龙阀门机械有限公司 | Composite elastic soft sealing |
| CN101451626A (en) * | 2008-12-30 | 2009-06-10 | 广东联塑市政工程管道有限公司 | Method for replacing valve sealing filler |
| CN202100740U (en) * | 2011-06-08 | 2012-01-04 | 无锡市宝牛阀业有限公司 | Three-eccentric sealing butterfly valve |
| CN202252028U (en) * | 2011-09-21 | 2012-05-30 | 铁岭方众阀门有限公司 | Metal-rubber sealing sub butterfly valve |
| EP2657582A1 (en) * | 2012-04-27 | 2013-10-30 | Metso Automation MAPAG GmbH | Shut-off valve with a shut-off disc with a rotating bearing |
| CN203656229U (en) * | 2013-11-15 | 2014-06-18 | 浙江时代铸造有限公司 | Butterfly plate device for butterfly valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109079701A (en) * | 2018-09-21 | 2018-12-25 | 上海沪东造船阀门有限公司 | A kind of butterfly valve seal circle pre-assembled auxiliary tool and its method |
| CN109079701B (en) * | 2018-09-21 | 2020-06-16 | 上海沪东造船阀门有限公司 | Auxiliary tool for pre-assembling butterfly valve sealing ring and method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107725795B (en) | 2019-08-13 |
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