CN2402891Y - Compound three-way stop cock - Google Patents
Compound three-way stop cock Download PDFInfo
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- CN2402891Y CN2402891Y CN 99252300 CN99252300U CN2402891Y CN 2402891 Y CN2402891 Y CN 2402891Y CN 99252300 CN99252300 CN 99252300 CN 99252300 U CN99252300 U CN 99252300U CN 2402891 Y CN2402891 Y CN 2402891Y
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Abstract
The utility model relates to a combined type three-way cock valve, which comprises a valve driving device, a driving shaft, a valve body, a valve core, a valve cover, a valve seat, etc., wherein, the valve body is provided with an upper set of inlets and outlets of which the number is three, and a lower set of inlets and outlets of which the number is three, the inlets and outlets are uniformly distributed, each set has a main inlet and outlet, and the phase difference of the main inlet and outlet is 180 DEG; the valve core is provided with an upper set of inlets and outlets of which the number is two, and a lower set of inlets and outlets of which the number is two, and the positions where the valve core corresponds to the two main inlets and outlets of the valve body are provided with two inlets and outlets; other two inlets and outlets are respectively arranged at included angle 120DEG points, and the phase difference of the two inlets and outlets is 180DEG; the valve core is driven by a valve rod to rotate clockwise or anticlockwise and carry out the on-off switching of the valve. The utility model can normally work under the operating conditions of large flux, low flow rate, and high temperature, and ensure the switching synchronization.
Description
The utility model relates to a kind of stopcock, particularly relates to a kind of compound threeway plug valve.
Common fluid is the requirement that reaches conveying and commutation by the switching of valve, for the high temperature fluid of heterogeneous big flux, needs to rely on the switching of valve to reach above-mentioned requirements too.In process of production; the high temperature fluid of heterogeneous big flux the two-way pipeline occurs through regular meeting and is in unlatching; the two-way pipeline is in closing state in addition; when switching direction, need again simultaneously the former two-way pipeline that is in unlatching to be closed; the former pipeline of closing that is in of two-way is opened, thereby reaches the requirement of fluid reversing.
In the prior art, when above-mentioned situation occurring, normally realize the requirement of fluid reversing by disposing four ball valve, butterfly valve, gate valve or stop valves of making synchronous working.But, particularly require more to be difficult to satisfy demand of practical production under the extra high occasion greater than 600 ℃ high temperature or switching synchronously in fluid temperature (F.T.) owing to many disadvantages such as cost increase that has pipe arrangement complexity, process units and synchronous operation difficulties.
The purpose of this utility model provides a kind of compound threeway plug valve, the synchronous switching when this valve can guarantee to realize the two-way fluid reversing.
Another purpose of the present utility model is the also normal running at high temperature of this compound threeway plug valve, can guarantee the synchronous switching of the heterogeneous fluid reversing of big flux, low flow velocity equally.
Further purpose of the present utility model is that this compound threeway plug valve can adopt Electric actuator to drive the valve convection current to switching, and realizes the automation control of valve.
The utility model is to realize like this.Compound threeway plug valve of the present utility model, comprise valve drive, valve drive connects transmission shaft, the lower end of transmission shaft and the upper end of valve rod join by coupling, be snubber below the coupling, valve rod is fixedlyed connected with spool, and the spool outside is a valve body, fixedlying connected with the lower end sealing surface of valve gap in the top of valve body, fixedlys connected with the upper end sealing surface of valve seat in the bottom of valve body.Described valve body is the tubular shape valve body, have two groups of equally distributed each three import and export up and down on the valve body, wherein there is one to be main the import and export in every group of three import and export, two main phase differences of importing and exporting are 180 ° up and down, it in the valve body tubular shape spool, the internal diameter of valve body and the external diameter of spool are complementary, have two groups of each two import and export up and down on the spool, wherein having two import and export on two corresponding positions of main import and export up and down with valve body on the spool, and locating to have two import and export in addition for 120 ° with the import and export angle respectively, the phase difference of these two import and export is 180 °, spool by valve rod drive can be in valve body be the rotation of clockwise or counterclockwise two states of 120 ° as angle, make valve body up and down two groups of import and export can open or close switching.
Compound threeway plug valve of the present utility model, the outer surface of tubular shape spool up and down two groups import and export between and the two ends of spool have dustproof restrictor ring, the both sides of every group of two import and export have dustproof throttling groove vertically.
Compound threeway plug valve of the present utility model, valve core outer surface up and down two groups import and export between and the two ends of spool have 3～12 dustproof restrictor rings, the both sides of every group of two import and export have 3～9 dustproof throttling grooves vertically.
The cooperation of spool and valve body is a Spielpassung, and along with the increase of valve core diameter or increasing of working temperature, it is flexible that the gap value that spool cooperates with valve body also will correspondingly increase the rotation that is beneficial to valve.Outer surface at spool has dustproof restrictor ring and have dustproof throttling groove vertically between every group of import and export between two groups of import and export up and down, the gap that can reduce spool and valve body cause up and down two groups import and export between or the crossfire phenomenon between every group of three import and export, satisfy that valve can use steadily in the long term under the major diameter or the condition of high temperature.
Compound threeway plug valve of the present utility model, main on described valve body and the spool are imported and exported and imported and exported all be rectangle, and it is perpendicular with the rectangular flange sealing surface of main import and export that the valve body master imports and exports the rectangular flange sealing surface of import and export of both sides.This is can be a lot of greatly than the cross-section area of pipe because open channel cross-sectional area that rectangular opening obtains on the periphery of same diameter pipe, and therefore, under the identical condition of flow, flow velocity, the rotating diameter of the valve that rectangle is imported and exported can be obtained more a little bit smaller.The rectangular flange sealing surface and the main rectangular flange sealing surface of importing and exporting of the import and export of the main import and export both sides on the valve body are perpendicular in addition, will help the convenient and saving occupation of land space of pipe arrangement on engineering.
Compound threeway plug valve of the present utility model, be connected with the transmission shaft cooler below the described valve drive, the transmission shaft cooler has a drum shape inner chamber, intake pipe and outlet pipe are arranged on the transmission shaft cooler, intake pipe and outlet pipe communicate with inner chamber, transmission shaft cooler bottom is connected with the cooler mounting flange, and the cooler mounting flange is connected with the upper flange of valve gap.
Compound threeway plug valve of the present utility model, the side of described valve gap and valve seat has ventilation window, helps two position heat radiations up and down of valve.
Compound threeway plug valve of the present utility model, described valve drive is an Electric actuator.Electric actuator by and programmable controller (PLC) link, can realize the automatic control that valve switches.
Working principle of the present utility model is: valve drive rotates, drive transmission shaft and valve rod and rotate, the spool that is fixed on the valve rod also rotates thereupon, because the snubber effect, spool can only be done 120 ° of clockwise or counterclockwise two states rotations of angle, the switching of importing and exporting in valve body.When spool was rotated clockwise to the M position in valve body, the main import and export 15 in valve body top were opened, and import and export 17 and close, and import and export 18 and open, and fluid is imported and exported 15 from the master and entered, and flows out from importing and exporting 18; Perhaps fluid enters from importing and exporting 18, flows out from main import and export 15.Simultaneously, the main import and export 16 of valve body lower portion are opened, and import and export 20 and close, and import and export 19 and open, and fluid is imported and exported 16 from the master and entered, and flow out from importing and exporting 19; Perhaps fluid enters from importing and exporting 19, flows out from main import and export 16.When spool was rotated counterclockwise the N position in valve body, the main import and export 15 in valve body top were opened, and import and export 17 and open, and import and export 18 and close, and fluid is imported and exported 15 from the master and entered, and flows out from importing and exporting 17; Perhaps fluid enters from importing and exporting 17, flows out from main import and export 15.Simultaneously, the main import and export 16 of valve body lower portion are opened, and import and export 20 and open, and import and export 19 and close, and fluid is imported and exported 16 from the master and entered, and flow out from importing and exporting 20; Perhaps fluid enters from importing and exporting 20, flows out from main import and export 16.Because adopted the structural type of compound threeway, the switching of two-way direction of flow can definitely guarantee synchronously.
The utility model compared with prior art has following advantage: one, stopcock of the present utility model is owing to adopted the structure of compound threeway, a valve can play the effect of four ball valves, butterfly valve, gate valve or stop valves, thereby simplified the configuration of pipe-line system, robot control system(RCS) and technological operation flow process have been simplified, it is synchronous that the operation that has reduced the construction cost of process units, particularly single valve significantly can guarantee definitely that direction of flow switches.Two, stopcock of the present utility model can be at flow＞5000Nm
3The big flux of/h, flow velocity again＜the low flow conditions of 15m/s under, and proper functioning under the worst hot case of temperature＞600 ℃.Under so big flux, low flow velocity and high temperature condition, general threeway plug valve can't be satisfied the demand.Three, the valve drive of stopcock of the present utility model both can adopt manual mode, also can adopt electronic mode, with the supporting automation control that realizes the direction of flow handover operation of computer controlled system.
Now in conjunction with the accompanying drawings embodiment of the present utility model is specified.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is an A-A cross-sectional view of the present utility model.
Fig. 3 is a B-B cross-sectional view of the present utility model.
Fig. 4 is the practical figure of C-C cross-section structure of the present utility model.
Fig. 5 is the structural representation of dustproof restrictor ring of the utility model and dustproof throttling groove.
Fig. 6 is the cross-sectional view of the dustproof throttling groove of the utility model.
Number in the figure is represented:
The 1-valve drive, 2-transmission shaft, 3-transmission shaft cooler, 4-cooler inner chamber, the 5-intake pipe, 6-outlet pipe, 7-coupling, 8-cooler mounting flange, the 9-snubber, 10-valve gap, 11-valve body, the 12-spool, 13-valve rod, 14-valve seat, 15,16-master imports and exports, and 17,18,19,20-imports and exports, 21, the 22-ventilation window, the 23-restrictor ring that prevents dust, the 24-throttling groove that prevents dust, 25,26,27, the 28-spool imports and exports.
Below in conjunction with Fig. 1～Fig. 6, further specify the utility model by detailed description, but embodiment not to restriction of the present utility model to the utility model embodiment.
Embodiment 1:
A kind of compound threeway plug valve, comprise valve drive 1, valve drive 1 connects transmission shaft 2, the upper end of the lower end of transmission shaft 2 and valve rod 13 joins by coupling 7, be snubber 9 below the coupling 7, valve rod 13 is fixedlyed connected with spool 12, and spool 12 outsides are valve bodies 11, fixedlying connected with the lower end sealing surface of valve gap 10 in the top of valve body 11, fixedlys connected with the upper end sealing surface of valve seat 14 in the bottom of valve body 11.Valve body 11 is tubular shape valve bodies, and two groups of equally distributed each three import and export about having on the valve body 11 wherein have one to be main import and export 15,16 in every group of three import and export, and the phase difference of two main import and export 15,16 is 180 ° up and down.It in the valve body 11 tubular shape spool 12, the external diameter of the internal diameter of valve body 11 and spool 12 is complementary, have two groups of each two import and export up and down on the spool 12, wherein having two import and export 25,26 on two main import and export 15,16 corresponding positions with valve body about in the of 11 on the spool 12, and locating to have two import and export 27,28 in addition with importing and exporting 120 ° of 25,26 angles respectively, the phase difference of these two import and export 27,28 is 180 °.Spool 12 by valve rod 13 drive can be in valve body 11 be the rotation of clockwise or counterclockwise two states of 120 ° as angle, make valve body 11 about two groups of import and export can open or close switching, leading import and export 15,16 is normally open.
Outer surface at tubular shape spool 12 has 3 dustproof restrictor rings 23 between two groups of import and export up and down, has 3 dustproof throttling grooves 24 between every group of two import and export vertically.
Working principle is: valve drive rotates, drive transmission shaft and valve rod and rotate, the spool that is fixed on the valve rod also rotates thereupon, because the snubber effect, spool can only be done 120 ° of clockwise or counterclockwise two states rotations of angle, the switching of importing and exporting in valve body.When spool was rotated clockwise to the M position in valve body, the main import and export 15 in valve body top were opened, and import and export 17 and close, and import and export 18 and open, and fluid is imported and exported 15 from the master and entered, and flows out from importing and exporting 18; Perhaps fluid enters from importing and exporting 18, flows out from main import and export 15.Simultaneously, the main import and export 16 of valve body lower portion are opened, and import and export 20 and close, and import and export 19 and open, and fluid is imported and exported 16 from the master and entered, and flow out from importing and exporting 19; Perhaps fluid enters from importing and exporting 19, flows out from main import and export 16.When spool was rotated counterclockwise the N position in valve body, the main import and export 15 in valve body top were opened, and import and export 17 and open, and import and export 18 and close, and fluid is imported and exported 15 from the master and entered, and flows out from importing and exporting 17; Perhaps fluid enters from importing and exporting 17, flows out from main import and export 15.Simultaneously, the main import and export 16 of valve body lower portion are opened, and import and export 20 and open, and import and export 19 and close, and fluid is imported and exported 16 from the master and entered, and flow out from importing and exporting 20; Perhaps fluid enters from importing and exporting 20, flows out from main import and export 16.Because adopted the structural type of compound threeway, the switching of two-way direction of flow can definitely guarantee synchronously.
Embodiment 2:
A kind of compound threeway plug valve, comprise valve drive 1, valve drive 1 connects transmission shaft 2, the upper end of the lower end of transmission shaft 2 and valve rod 13 joins by coupling 7, be snubber 9 below the coupling 7, valve rod 13 is fixedlyed connected with spool 12, and spool 12 outsides are valve bodies 11, fixedlying connected with the lower end sealing surface of valve gap 10 in the top of valve body 11, fixedlys connected with the upper end sealing surface of valve seat 14 in the bottom of valve body 11.Valve body 11 is tubular shape valve bodies, and two groups of equally distributed each three import and export about having on the valve body 11 wherein have one to be main import and export 15,16 in every group of three import and export, and the phase difference of two main import and export 15,16 is 180 ° up and down.It in the valve body 11 tubular shape spool 12, the external diameter of the internal diameter of valve body 11 and spool 12 is complementary, have two groups of each two import and export up and down on the spool 12, wherein having two import and export 25,26 on two main import and export 15,16 corresponding positions with valve body about in the of 11 on the spool 12, and locating to have two import and export 27,28 in addition with importing and exporting 120 ° of 25,26 angles respectively, the phase difference of these two import and export 27,28 is 180 °.Spool 12 by valve rod 13 drive can be in valve body 11 be the rotation of clockwise or counterclockwise two states of 120 ° as angle, make valve body 11 about two groups of import and export can open or close switching, leading import and export 15,16 is normally open.
Outer surface at tubular shape spool 12 has 7 dustproof restrictor rings 23 between two groups of import and export up and down, has 7 dustproof throttling grooves 24 between every group of two import and export vertically.
Be connected with transmission shaft cooler 3 below the valve drive 1, transmission shaft cooler 3 has a drum shape inner chamber 4, intake pipe 5 and outlet pipe 6 are arranged on the transmission shaft cooler 3, intake pipe 5 and outlet pipe 6 communicate with inner chamber 4, transmission shaft cooler 3 bottoms are connected with cooler mounting flange 8, and cooler mounting flange 8 is connected with the upper end sealing surface of valve gap 10.The side of valve gap 10 and valve seat 14 has ventilation window 21,22.Valve drive 1 is an Electric actuator.
Working principle is with embodiment 1.
Embodiment 3:
A kind of compound threeway plug valve, comprise valve drive 1, valve drive 1 connects transmission shaft 2, the upper end of the lower end of transmission shaft 2 and valve rod 13 joins by coupling 7, be snubber 9 below the coupling 7, valve rod 13 is fixedlyed connected with spool 12, and spool 12 outsides are valve bodies 11, fixedlying connected with the lower end sealing surface of valve gap 10 in the top of valve body 11, fixedlys connected with the upper end sealing surface of valve seat 14 in the bottom of valve body 11.Valve body 11 is tubular shape valve bodies, and two groups of equally distributed each three import and export about having on the valve body 11 wherein have one to be main import and export 15,16 in every group of three import and export, and the phase difference of two main import and export 15,16 is 180 ° up and down.It in the valve body 11 tubular shape spool 12, the external diameter of the internal diameter of valve body 11 and spool 12 is complementary, have two groups of each two import and export up and down on the spool 12, wherein having two import and export 25,26 on two main import and export 15,16 corresponding positions with valve body about in the of 11 on 3 spools 12, and locating to have two import and export 27,28 in addition with importing and exporting 120 ° of 25,26 angles respectively, the phase difference of these two import and export 27,28 is 180 °.Spool 12 by valve rod 13 drive can be in valve body 11 be the rotation of clockwise or counterclockwise two states of 120 ° as angle, make valve body 11 about two groups of import and export can open or close switching, leading import and export 15,16 is normally open.
Outer surface at tubular shape spool 12 has 12 dustproof restrictor rings 23 between two groups of import and export up and down, drives 9 dustproof throttling grooves 24 between every group of two import and export vertically.
Main import and export and import and export on valve body 11 and the spool 12 all are rectangle, and the rectangular flange sealing surface of the import and export 17,18,19,20 of valve body 11 main import and export 15,16 both sides is perpendicular with the rectangular flange sealing surface of master's import and export.
Be connected with transmission shaft cooler 3 below the valve drive 1, transmission shaft cooler 3 has a drum shape inner chamber 4, intake pipe 5 and outlet pipe 6 are arranged on the transmission shaft cooler 3, intake pipe 5 and outlet pipe 6 communicate with inner chamber 4, transmission shaft cooler 3 bottoms are connected with cooler mounting flange 8, and cooler mounting flange 8 is connected with the upper end sealing surface of valve gap 10.The side of valve gap 10 and valve seat 14 has ventilation window 21,22.Valve drive 1 is an Electric actuator.
Working principle is with embodiment 1.
Claims (7)
1, a kind of compound threeway plug valve, comprise valve drive [1], valve drive [1] connects transmission shaft [2], the upper end of the lower end of transmission shaft [2] and valve rod [13] joins by coupling [7], below the coupling [7] snubber [9], valve rod [13] is fixedlyed connected with spool [12], spool [12] outside is valve body [11], fixedly connected with the lower end sealing surface of valve gap [10] in the top of valve body [11], fixedly connected with the upper end sealing surface of valve seat [14] in the bottom of valve body [11], it is characterized in that: described valve body [11] is the tubular shape valve body, have two groups of equally distributed each three import and export up and down on the valve body [11], wherein there is one to be main import and export [15 in every group of three import and export, 16], two main import and export [15 up and down, 16] phase difference is 180 °, in the valve body [11] tubular shape spool [12], the external diameter of the internal diameter of valve body [11] and spool [12] is complementary, have two groups of each two import and export up and down on the spool [12], wherein spool [12] go up with valve body [11] up and down two mainly import and export [15,16] have two on the corresponding position and import and export [25,26], and respectively with import and export [25,26] angle locates to have two import and export [27 in addition for 120 °, 28], import and export [27 for these two, 28] phase difference is 180 °, spool [12] by valve rod [13] drive can be in valve body [11] be the rotation of clockwise or counterclockwise two states of 120 ° as angle, make valve body [11] up and down two groups of import and export can open or close switching, main import and export [15,16] be normally open.
2, compound threeway plug valve according to claim 1, it is characterized in that: the outer surface of tubular shape spool [12] up and down two groups import and export between and the two ends of spool have dustproof restrictor ring [23], the both sides of every group of two import and export have dustproof throttling groove [24] vertically.
3, compound threeway plug valve according to claim 1, it is characterized in that: described spool [12] outer surface up and down two groups import and export between and the two ends of spool have 3～12 dustproof restrictor rings [23], the both sides of every group of two import and export have 3～9 dustproof throttling grooves [24] vertically.
4, compound threeway plug valve according to claim 1, it is characterized in that: main import and export and import and export on described valve body [11] and the spool [12] all are rectangle, and the rectangular flange sealing surface of the import and export [17,18,19,20] of the main import and export of valve body [11] [15,16] both sides is perpendicular with the rectangular flange sealing surface of master's import and export.
5, compound threeway plug valve according to claim 1, it is characterized in that: be connected with transmission shaft cooler [3] below the valve drive [1], it is drum shape inner chamber [4] that transmission shaft cooler [3] has a cross section, intake pipe [5] and outlet pipe [6] are arranged on the transmission shaft cooler [3], intake pipe [5] and outlet pipe [6] communicate with inner chamber [4], and the cooler mounting flange [8] of transmission shaft cooler [3] bottom is connected with the upper flange of valve gap [10].
6, compound threeway plug valve according to claim 1 is characterized in that: the side of described valve gap [10] and valve seat [14] has ventilation window [21,22].
7, compound threeway plug valve according to claim 1 is characterized in that: described valve drive [1] is an Electric actuator, and this Electric actuator can link with programmable controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99252300 CN2402891Y (en) | 1999-12-29 | 1999-12-29 | Compound three-way stop cock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99252300 CN2402891Y (en) | 1999-12-29 | 1999-12-29 | Compound three-way stop cock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2402891Y true CN2402891Y (en) | 2000-10-25 |
Family
ID=34036577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99252300 Expired - Lifetime CN2402891Y (en) | 1999-12-29 | 1999-12-29 | Compound three-way stop cock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2402891Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907184A (en) * | 2010-04-23 | 2010-12-08 | 李仕清 | Combined type reversal valve |
| WO2011131040A1 (en) * | 2010-04-23 | 2011-10-27 | Li Shiqing | Combined reversing valve |
| CN102242820A (en) * | 2011-03-29 | 2011-11-16 | 湖南天雁机械有限责任公司 | High-temperature gas conversion valve |
| CN102549323A (en) * | 2009-09-18 | 2012-07-04 | 西门子公司 | Valve for a continuous-flow machine |
| CN102908680A (en) * | 2011-08-02 | 2013-02-06 | 常熟市赛爱斯医疗器材有限公司 | Drain valve structure of medical semiautomatic drainage meter |
| CN103148242A (en) * | 2013-03-07 | 2013-06-12 | 安庆泰邦机械科技有限责任公司 | Two-position six-way quick switching valve |
| IT201700010534A1 (en) * | 2017-01-31 | 2018-07-31 | Giacomini Spa | VALVE MULTI-VIA PERFECTED |
| CN109846716A (en) * | 2019-01-31 | 2019-06-07 | 浙江迈帝康医疗器械有限公司 | A kind of nutrition pump, infusion apparatus, control valve and liquid control method |
| IT201900002529A1 (en) | 2019-02-21 | 2020-08-21 | Giacomini Spa | VALVE FOR HYDRAULIC REGULATION AND BALANCING OF FLUID FLOW |
-
1999
- 1999-12-29 CN CN 99252300 patent/CN2402891Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102549323A (en) * | 2009-09-18 | 2012-07-04 | 西门子公司 | Valve for a continuous-flow machine |
| CN102549323B (en) * | 2009-09-18 | 2014-01-29 | 西门子公司 | Valve for a continuous-flow machine |
| CN101907184A (en) * | 2010-04-23 | 2010-12-08 | 李仕清 | Combined type reversal valve |
| WO2011131040A1 (en) * | 2010-04-23 | 2011-10-27 | Li Shiqing | Combined reversing valve |
| CN102242820A (en) * | 2011-03-29 | 2011-11-16 | 湖南天雁机械有限责任公司 | High-temperature gas conversion valve |
| CN102908680A (en) * | 2011-08-02 | 2013-02-06 | 常熟市赛爱斯医疗器材有限公司 | Drain valve structure of medical semiautomatic drainage meter |
| CN103148242A (en) * | 2013-03-07 | 2013-06-12 | 安庆泰邦机械科技有限责任公司 | Two-position six-way quick switching valve |
| IT201700010534A1 (en) * | 2017-01-31 | 2018-07-31 | Giacomini Spa | VALVE MULTI-VIA PERFECTED |
| CN109846716A (en) * | 2019-01-31 | 2019-06-07 | 浙江迈帝康医疗器械有限公司 | A kind of nutrition pump, infusion apparatus, control valve and liquid control method |
| IT201900002529A1 (en) | 2019-02-21 | 2020-08-21 | Giacomini Spa | VALVE FOR HYDRAULIC REGULATION AND BALANCING OF FLUID FLOW |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |