CN103629394A - Planar sealing suction bottom valve matched with low-temperature immersed pump - Google Patents
Planar sealing suction bottom valve matched with low-temperature immersed pump Download PDFInfo
- Publication number
- CN103629394A CN103629394A CN201310640882.3A CN201310640882A CN103629394A CN 103629394 A CN103629394 A CN 103629394A CN 201310640882 A CN201310640882 A CN 201310640882A CN 103629394 A CN103629394 A CN 103629394A
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- Prior art keywords
- low temperature
- immersed pump
- temperature immersed
- valve
- bottom valve
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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
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
- F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
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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
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
- F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/01—Propulsion of the fluid
- F17C2227/0128—Propulsion of the fluid with pumps or compressors
- F17C2227/0171—Arrangement
- F17C2227/0178—Arrangement in the vessel
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention relates to the field of immersed pumps in low-temperature vertical tanks, and discloses a planar sealing suction bottom valve matched with a low-temperature immersed pump. The planar sealing suction bottom valve is arranged at the bottom of a pump well, and comprises a valve body, a valve plate, springs and spring guide rods, wherein the valve body has a planar structure; the upper end of the valve body is provided with circular-arc bosses I; the upper end faces of the circular-arc bosses I are sealed with the flange end face of the pump well; the lower end of the valve body is provided with circular-arc bosses II; the spring guide rods pass through through holes in the circular-arc bosses II and are fixed together with the valve plate; the springs are sleeved on the peripheries of the spring guide rods and at the upper ends of the circular-arc bosses II, and are fixed on the spring guide rods through fixing devices; a cylindrical cavity is formed inside the valve body. According to the planar sealing suction bottom valve, the opening and closing of the bottom valve are controlled through the deadweight of the low-temperature immersed pump; the planar sealing suction bottom valve has the advantages of simples structure, stable performance and high sealing performance; the planar sealing suction bottom valve is immersed into low-temperature liquid for a long period of time, so that maintenance is not needed, and the working requirement of safe running under a low-temperature working environment can be met.
Description
Technical field
The present invention relates to immersed pump field in low temperature vertical tank, be particularly related to the supporting plane sealing of a kind of low temperature vertical immersed pump and suck bottom valve, can be applicable to LNG(is LNG Liquefied natural gas, and temperature is-162 °) conveying of the cryogenic media such as alkanes, olefines in industrial chain, coal tar furnace gas methanation LNG processed, dehydrogenating propane project.
Background technique
At present, in alkanes, the hydrocarbon medium of large, medium and small LNG receiving station, LNG liquefaction plant, coal tar furnace gas methanation LNG device processed and dehydrogenating propane project are carried, all need to use low temperature immersed pump, because medium has the characteristic of low temperature, inflammable, explosive and easy vaporization, therefore require to carry the pumping unit of this medium to there is sealing reliably and the reliable feature of structural safety, but the design difficulty of this low temperature immersed pump is very large.
Present stage low temperature immersed pump market is mainly by several the monopolizations such as Nikkiso of the J.C.Carter of the U.S., Japanese Ebara company, Japan, and the domestic manufacturing firm that there is no carries out research and production to low temperature immersed pump in LNG tank.Therefore, the external interdependency of this low temperature immersed pump is higher, and price is also very expensive.
The production domesticization of low temperature immersed pump and supporting suction bottom valve is conducive to the cost control in low temperature immersed pump Process of Localization, be conducive to the maintenance of low temperature immersed pump, the lifting that is conducive to domestic low temperature immersed pump overall design and manufactures level of processing, be conducive to the application extension of state's inner spring under worst cold case, be conducive to the application of domestic low temperature seal cushion material.Therefore, urgently
oneplant the supporting plane sealing of low temperature immersed pump and suck bottom valve.
Summary of the invention
The object of the invention is: in order to solve, existing low temperature immersed pump designed, designed difficulty is large, the external high and expensive technical problem of interdependency, provide the supporting plane sealing of a kind of low temperature immersed pump to suck bottom valve, by the deadweight of low temperature immersed pump, controlled the open and close of valve plate, the service condition of low temperature immersed pump be can meet, safety and reliable sealing in maintenance process guaranteed simultaneously.
For achieving the above object, the technical solution used in the present invention is: provide the supporting plane sealing of a kind of low temperature immersed pump to suck bottom valve, the supporting plane sealing of described low temperature immersed pump sucks bottom valve and is arranged on pump sump 2 bottoms, comprising: valve body 5, valve plate 11, spring 6, spring guide 7, sealing configuration; Described valve body 5 adopts plane structure, and described valve body 5 upper ends are provided with arc cam I 12, and the end face of flange of the upper-end surface of described arc cam I 12 and pump sump 2 seals; Described valve body 5 lower ends are provided with arc cam II 13, and described spring guide 7 is fixing through through hole and the valve plate 11 of arc cam II 13, and described valve plate 11 is plane structure; Described spring 6 is enclosed within the upper end of spring guide 7 outer rims, arc-shaped convex II 13, and is fixed on spring guide 7 by fixing device; Described sealing configuration is arranged on valve body 5 bottom ends that contact with valve plate 11.
Wherein, the supporting plane sealing suction of described low temperature immersed pump bottom valve also comprises: anti-rotation device; Described anti-rotation device is arranged at valve body 5 lower end inwalls.
Wherein, described anti-rotation device is anti-rotation pawl 8, and described anti-rotation pawl 8 is staggered with the anti-rotation pawl I of low temperature immersed pump self, and lattice keep off mutually.
Wherein, described sealing configuration is sealing gasket 14, and the structure of described sealing gasket 14 is intermediate groove form, and groove outside is arc surface annular protrusion, and groove inner side is planar projections, and a little higher than planar projections of arc surface annular protrusion; The pressing plate 15 that described sealing gasket 14 is made by Austenitic Stainless Steel is fastened on valve body 5.
Wherein, the material of described sealing gasket 14 is ultra-high molecular weight polyethylene, polytetrafluoroethylene (PTFE) or Furtulon (V7026).
Wherein, described fixing device is spring capping 9, and described spring capping 9 adds locating stud with spring guide 7 employing screw threads or unthreaded hole and is connected.
Wherein, between described spring guide 7 and the through hole of arc cam II 13, be provided with setting sleeve 10.
Wherein, between described arc cam I 12 and the end face of flange of pump sump 2, adopt O type circle or metal wound gasket to seal.
Wherein, the structure that adopts plane to add O type circle between described low temperature immersed pump 3 and suction bottom valve 4 seals, and low temperature immersed pump 3 contacts completely with the sealing surfaces that sucks bottom valve 4.
Wherein, described spring 6 is cylindrical helical spring, and material is Austenitic Stainless Steel, and the weight relationships of its spring force and low temperature immersed pump 3 is: the weight of low temperature immersed pump 3 is greater than spring force.
The invention has the beneficial effects as follows: the present invention is controlled the open and close of valve plate by the deadweight of low temperature immersed pump, in low temperature immersed pump running, suck bottom valve low temperature immersed pump is communicated with storage tank; When carrying out the maintenance of low temperature immersed pump, suck bottom valve low temperature immersed pump and storage tank are carried out to isolating seal, can effectively prevent that in storage tank, dielectric leakage out, guarantees the Security of operation.Simple in structure, stable performance of the present invention, good airproof performance, be immersed in cryogenic liquide and do not need to be serviced for a long time, can realize the job requirement of safe operation under low-temperature working environment.
Accompanying drawing explanation
Fig. 1 is mounting point of the present invention schematic diagram.
Fig. 2 is structural representation of the present invention.
Fig. 3 is sealed structural representation of the present invention.
Fig. 4 is spring guide fixed form schematic diagram of the present invention.
Accompanying drawing sign: 1-storage tank, 2-pump sump, 3-low temperature immersed pump, 4-sucks bottom valve, 5-valve body, 6-spring, 7-spring guide, 8-anti-rotation pawl, 9-spring capping, 10-setting sleeve, 11-valve plate, 12-arc cam I, 13-arc cam II, 14-sealing gasket, 15-pressing plate, 16-bolt/screw, 17-slotted nut, 18-pin.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
The present invention selects Austenitic Stainless Steel, aluminum alloy as its valve body 5, valve plate 11 materials; The material selection ultra-high molecular weight polyethylene of sealing configuration, polytetrafluoroethylene (PTFE), Furtulon (V7026); Spring 6 is selected spring stainless steel.
With reference to Fig. 1, the supporting plane sealing of a kind of low temperature immersed pump of the present invention sucks bottom valve and is arranged on pump sump 2 bottoms, and integral body is immersed in cryogenic liquide.
With reference to Fig. 2, the present invention includes: valve body 5, valve plate 11, spring 6, spring guide 7, sealing configuration, be arranged at the anti-rotation device of valve body 5 lower end inwalls; Described valve body 5 adopts plane structure, and described valve body 5 upper ends are provided with arc cam I 12, and the end face of flange of the upper-end surface of described arc cam I 12 and pump sump 2 seals; Described valve body 5 lower ends are provided with arc cam II 13, and described spring guide 7 is fixing through through hole and the valve plate 11 of arc cam II 13, and described valve plate 11 is plane structure; Described spring 6 is enclosed within the upper end of spring guide 7 outer rims, arc-shaped convex II 13, and is fixed on spring guide 7 by fixing device; Described sealing configuration is arranged on valve body 5 bottom ends that contact with valve plate 11, has guaranteed to suck the sealing reliability under bottom valve 4 low temperature.Wherein, the boss structure of valve plate 11 upper-end surface designs, compares with same kind of products at abroad, has reduced captured area, has strengthened the resistance to liquid, can reach better sealing effect.
Described anti-rotation device is anti-rotation pawl 8, when low temperature immersed pump 3 is in place, described anti-rotation pawl 8 is staggered with the anti-rotation pawl I of low temperature immersed pump self, realize mutual lattice gear, thereby prevent that low temperature immersed pump 3 from suction bottom valve 4, relative rotation occurring in running, increase stability and the reliability of complete machine running, guaranteed the safe and stable operation of low temperature immersed pump 3.
Described fixing device is spring capping 9, and described spring capping 9 adds locating stud with spring guide 7 employing screw threads or unthreaded hole and is connected, and this structure can be adjusted the aperture that sucks bottom valve more accurately.When spring 6 elastic force are when larger, be difficult for compression, utilize thread pore structure by tight screw thread can be more prone to the decrement of Regulation spring 6.
With reference to Fig. 3, described sealing configuration is sealing gasket 14, and the structure of described sealing gasket 14 is intermediate groove form, and groove outside is arc surface annular protrusion, and groove inner side is planar projections, and a little higher than planar projections of arc surface annular protrusion; The pressing plate 15 that described sealing gasket 14 is made by Austenitic Stainless Steel is fastened on valve body 5.
For prevent valve plate open or closing process in the generation that is unfavorable for the phenomenon that seals such as be offset, rock, between described spring guide 7 and the through hole of arc cam II 13, be provided with setting sleeve 10, restraining spring guide rod 7 radial-plays, compare with same kind of products at abroad structure, this structure has the guidance quality of better spring guide, the unlatching, the closing process that make to suck bottom valve 4 are more steady, and sealing is more reliable.
Between described arc cam I 12 and the end face of flange of pump sump 2, adopt O type circle or metal wound gasket to seal, then tight with stud or bolt handle, thus realize the seal request sucking between bottom valve 4 and pump sump 2.
The structure that adopts plane to add O type circle between described low temperature immersed pump 3 and suction bottom valve 4 seals, and low temperature immersed pump 3 contacts completely with the sealing surfaces that sucks bottom valve 4.
Described spring 6 is cylindrical helical spring, and material is spring stainless steel, and it is linear that characteristic line is, and rigidity is stable.Described spring according to the weight of pump group, valve plate weight, stressed and seal the analysis of required power, carried out detailed analytical calculation, the weight relationships of its spring force and low temperature immersed pump 3 is: the weight of low temperature immersed pump 3 is greater than spring force, has improved the reliability that sucks bottom valve.Described spring 6 lifts spring guide 7 by spring capping 9 and locating stud, and spring guide 7 is connected with valve plate 11, be that the power indirectly-acting of spring 6 is on valve plate 11, further by the decrement of Regulation spring 6, regulate the size of the power that lifts valve plate 11, until reach suction bottom valve aperture and the sealing effect of designing requirement.
Working procedure of the present invention is: low temperature immersed pump 3 is dropped to and sucked bottom valve 4 inside by pump sump 2, at this moment the lower end surface of low temperature immersed pump 3 acts on valve plate 11 upper-end surfaces, deadweight Compress Spring 6 by low temperature immersed pump 3, valve plate 11 is opened downwards, thereby realized the unlatching that sucks bottom valve 4, low temperature immersed pump 3 is communicated with storage tank 1, starts normally operation; In carrying out tank during the maintenance of low temperature immersed pump 3, low temperature immersed pump 3 is hung out from pump sump 2, the power that now low temperature immersed pump 3 acts on valve plate 11 reduces gradually, until low temperature immersed pump 3 departs from valve plate 11 completely, valve plate 11 is risen to valve body 11 lower end sealing surfaces and is removed completely by lifting of spring 6, thereby completed, suck closing of bottom valve 4, low temperature immersed pump 3 is realized isolating seal with the cryogenic media in storage tank 1, effectively prevent that the interior dielectric leakage of storage tank 1 is in environment, guaranteed the safety of maintenance.
The present invention has taken into full account sealing material shrinkage amount at low temperatures, and the surface roughness of valve plate, the machining accuracy of planeness have guaranteed to suck bottom valve sealing reliability at low temperatures thus.
Above content is the further description of the present invention being done in conjunction with optimal technical scheme, can not assert that the concrete enforcement of invention only limits to these explanations.Concerning general technical staff of the technical field of the invention, not departing under the prerequisite of design of the present invention, can also make simple deduction and replacement, all should be considered as protection scope of the present invention.
Claims (10)
1. the supporting plane sealing of low temperature immersed pump sucks bottom valve, it is characterized in that, the supporting plane sealing of described low temperature immersed pump sucks bottom valve and is arranged on pump sump (2) bottom, comprising: valve body (5), valve plate (11), spring (6), spring guide (7), sealing configuration; Described valve body (5) adopts plane structure, and valve body (5) upper end is provided with arc cam I (12), and the end face of flange of the upper-end surface of described arc cam I (12) and pump sump (2) seals; Described valve body (5) lower end is provided with arc cam II (13), and described spring guide (7) is fixing through through hole and the valve plate (11) of arc cam II (13), and described valve plate (11) is plane structure; Described spring (6) is enclosed within the upper end of spring guide (7) outer rim, arc-shaped convex II (13), and is fixed on spring guide (7) by fixing device; Described sealing configuration is arranged on valve body (5) bottom end contacting with valve plate (11).
2. the supporting plane sealing of a kind of low temperature immersed pump according to claim 1 sucks bottom valve, it is characterized in that, the supporting plane sealing of described low temperature immersed pump sucks bottom valve and also comprises: anti-rotation device; Described anti-rotation device is arranged at valve body (5) lower end inwall.
3. the supporting plane sealing of a kind of low temperature immersed pump according to claim 2 sucks bottom valve, it is characterized in that, described anti-rotation device is anti-rotation pawl (8), and described anti-rotation pawl (8) is staggered with the anti-rotation pawl I of low temperature immersed pump (3) self, and lattice keep off mutually.
4. the supporting plane sealing of a kind of low temperature immersed pump according to claim 1 sucks bottom valve, it is characterized in that, described sealing configuration is sealing gasket (14), the structure of described sealing gasket (14) is intermediate groove form, groove outside is arc surface annular protrusion, groove inner side is planar projections, and a little higher than planar projections of arc surface annular protrusion; Described sealing gasket (14) is fastened on valve body (5) by pressing plate (15).
5. the supporting plane sealing of a kind of low temperature immersed pump according to claim 4 sucks bottom valve, it is characterized in that, the material of described sealing gasket (14) is ultra-high molecular weight polyethylene, teflon or Furtulon.
6. the supporting plane sealing of a kind of low temperature immersed pump according to claim 1 sucks bottom valve, it is characterized in that, described fixing device is spring capping (9), and described spring capping (9) adds locating stud with spring guide (7) employing screw thread or unthreaded hole and is connected.
7. the supporting plane sealing of a kind of low temperature immersed pump according to claim 1 sucks bottom valve, it is characterized in that, between described spring guide (7) and the through hole of arc cam II (13), is provided with setting sleeve (10).
8. the supporting plane sealing of a kind of low temperature immersed pump according to claim 1 sucks bottom valve, it is characterized in that, between described arc cam I (12) and the end face of flange of pump sump (2), adopts O type circle or metal wound gasket to seal.
9. the supporting plane sealing of a kind of low temperature immersed pump according to claim 1 sucks bottom valve, it is characterized in that, the structure that adopts plane to add O type circle between described low temperature immersed pump (3) and suction bottom valve (4) seals, and low temperature immersed pump (3) contacts completely with the sealing surfaces that sucks bottom valve (4).
10. the supporting plane sealing of a kind of low temperature immersed pump according to claim 1 sucks bottom valve, it is characterized in that, described spring (6) is cylindrical helical spring, material is spring stainless steel, and the weight relationships of its spring force and low temperature immersed pump (3) is: the weight of low temperature immersed pump (3) is greater than spring force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310640882.3A CN103629394A (en) | 2013-12-26 | 2013-12-26 | Planar sealing suction bottom valve matched with low-temperature immersed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310640882.3A CN103629394A (en) | 2013-12-26 | 2013-12-26 | Planar sealing suction bottom valve matched with low-temperature immersed pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103629394A true CN103629394A (en) | 2014-03-12 |
Family
ID=50210731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310640882.3A Pending CN103629394A (en) | 2013-12-26 | 2013-12-26 | Planar sealing suction bottom valve matched with low-temperature immersed pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103629394A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017084677A1 (en) * | 2015-11-18 | 2017-05-26 | Wärtsilä Svanehøj A/S | Foot valve and caisson comprising a foot valve |
| CN113446266A (en) * | 2021-06-18 | 2021-09-28 | 大连深蓝泵业有限公司 | Vibration damper for in-tank immersed pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3876120A (en) * | 1974-01-14 | 1975-04-08 | Itt | Pumping system and method |
| US3963381A (en) * | 1975-05-21 | 1976-06-15 | Air Products And Chemicals, Inc. | Double foot valve for cryogenic fluid containing tanks |
| US4080106A (en) * | 1976-01-12 | 1978-03-21 | International Telephone And Telegraph Corporation | Purged valve assembly and method of sealing |
| CN2570559Y (en) * | 2002-06-06 | 2003-09-03 | 扬州开发区日利达有限公司 | Magnetic force controlled float valve |
| CN203641573U (en) * | 2013-12-04 | 2014-06-11 | 大连深蓝泵业有限公司 | Plane sealing suction bottom valve matched with low temperature immersed pump |
-
2013
- 2013-12-26 CN CN201310640882.3A patent/CN103629394A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3876120A (en) * | 1974-01-14 | 1975-04-08 | Itt | Pumping system and method |
| US3963381A (en) * | 1975-05-21 | 1976-06-15 | Air Products And Chemicals, Inc. | Double foot valve for cryogenic fluid containing tanks |
| US4080106A (en) * | 1976-01-12 | 1978-03-21 | International Telephone And Telegraph Corporation | Purged valve assembly and method of sealing |
| CN2570559Y (en) * | 2002-06-06 | 2003-09-03 | 扬州开发区日利达有限公司 | Magnetic force controlled float valve |
| CN203641573U (en) * | 2013-12-04 | 2014-06-11 | 大连深蓝泵业有限公司 | Plane sealing suction bottom valve matched with low temperature immersed pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017084677A1 (en) * | 2015-11-18 | 2017-05-26 | Wärtsilä Svanehøj A/S | Foot valve and caisson comprising a foot valve |
| CN113446266A (en) * | 2021-06-18 | 2021-09-28 | 大连深蓝泵业有限公司 | Vibration damper for in-tank immersed pump |
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Application publication date: 20140312 |