CN110375108A - Integral type valve positioner - Google Patents
Integral type valve positioner Download PDFInfo
- Publication number
- CN110375108A CN110375108A CN201910800264.8A CN201910800264A CN110375108A CN 110375108 A CN110375108 A CN 110375108A CN 201910800264 A CN201910800264 A CN 201910800264A CN 110375108 A CN110375108 A CN 110375108A
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- Prior art keywords
- hole
- valve
- solenoid valve
- lower case
- control slide
- 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.)
- Pending
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- 238000007789 sealing Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 2
- 238000009434 installation Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229960000074 biopharmaceutical Drugs 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000012780 transparent material 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
-
- 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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The present invention relates to integral type valve positioners, including main casing, main casing includes the lower case being connected by fastener and upper housing, lower case is equipped with shaft, switching signal component, upper housing is equipped with position of the switch display component, it is characterized by: being equipped with the gentle control slide valve of the first solenoid valve in the lower case, the lower case is provided with through-hole, gas control slide valve has the connector connecting with through-hole, through-hole is equipped with indent collar extension, fire arrester is installed in indent collar extension, gas control slide valve is mounted on the outside of lower case by fastener, solenoid valve is mounted on the internal cavity bottom of lower case by fastener, above-mentioned switching signal component, first solenoid valve is connected on connecting terminal, this programme rationally utilizes lower case inner space, the gentle control slide valve of solenoid valve is connected by tracheae mode, the position of solenoid valve is installed by property shadow without limitations It rings, it is easy for installation, the service life of product is improved on the whole.
Description
Technical field
The present invention relates to the controllers of valve, especially integral type valve positioner.
Background technique
Valve positioner be with the matching used product of Pneumatic valve device, to control unlatching and the pass of operated pneumatic valve
It closes, may be implemented in control room at a distance to the control of operated pneumatic valve.
Valve information transmitter is also known as valve position feedback device, is mountable on the switching modes valve such as angle valve, diaphragm valve, butterfly valve,
To export valve state in the form of switching signal, it can conveniently be connected in live PLC or DCS system, realize valve switch shape
The distinct feed-back of state.
In the related technology, valve information transmitter includes bottom case, face-piece, shaft, cam and microswitch (or close switch), is turned
Axis is threaded through between bottom case and face-piece, and cam is located in shaft to be rotated with shaft, and microswitch is located in bottom case, in concrete application
When, shaft is connected to actuator, and actuator is then connected to valve, and valve information transmitter makes to be driven by coaxial connector or feedback rod
Axis generates rotation, and cam is allowed to touch microswitch, thus make the contact closure or disconnection of switch block, it is outside by connecting terminal
Portion transmits on-off model, and is shown on the spot by indicator.
Current valve returns fast device and valve positioner is typically all to be independently arranged, and returns fast device according to existing valve
Inner space construction, inner space is limited, cause cannot with valve positioner integrally install, cause effect it is also limited.
But also there is valve to return fast device to solve the above-mentioned problems, it proposes to improve, but still there is certain defect, have
Body is as follows: valve returns fast device, and solenoid valve is on main casing inner wall during the installation process, and when installation will appear and through-hole
It is misaligned and dust or particle compares into the import of solenoid valve, due to the limitation of inner space, the screw thread of connecting terminal
The distance between hole mounting post and through-hole are the mounting distance of solenoid valve, cause connecting terminal installation very inconvenient in this way, can
Know and install more troublesome, still there is the short problem of solenoid valve service life, the mainly influence of dust or particle, lead to electromagnetism
The entrance of valve easily blocks, and also can not guarantee the normal operation of product in case of fire, and protection is not high when causing to apply.
For this problem, the present invention proposes modification.
Summary of the invention
The present invention proposes integral type valve positioner, solves the above problem present in use process in the prior art.
The technical scheme of the present invention is realized as follows:
Integral type valve positioner, including main casing, main casing include the lower case being connected by fastener and upper housing, under
Shell has internal cavity, and shaft is equipped in internal cavity, rotates the switching signal component for generating switching signal, upper housing through shaft
Equipped with position of the switch display component, switching signal component is installed on shaft side, it is characterised in that: installs in the lower case
The gas control slide valve for having the first solenoid valve and being worked by the first solenoid valve control, the lower case are provided with through-hole, and through-hole is set to down
Shell side peripheral wall, gas control slide valve have the connector connecting with through-hole, and indent collar extension is equipped on the through-hole, is pacified in indent collar extension
Equipped with fire arrester, gas control slide valve is mounted on the outside of lower case by fastener, and the first solenoid valve is mounted on lower casing by fastener
The internal cavity bottom of body, is equipped with tracheae between first solenoid valve and gas control slide valve, connect by through-hole with tracheae described in
The gentle control slide valve of first solenoid valve, which is realized, to be connected, and connecting terminal, above-mentioned switching signal group are also equipped in the lower case
Part and the first solenoid signal are connected to connecting terminal.
Preferably, tracheae includes air inlet pipe and an air outlet pipe, and through-hole includes air through hole and exhaust through hole, air inlet pipe both ends point
It is not connected to the inlet channel of air through hole and solenoid valve, escape pipe both ends are separately connected going out for exhaust through hole and the first solenoid valve
Gas channel.
It preferably, further include having second solenoid valve, second solenoid valve and the first solenoid valve block are at for controlling gas control slide valve
Double automatically controlled control pieces, the first through hole for the structure that is the same as through hole is provided in lower case, is provided with indent notch in first through hole,
It is furnished with fire arrester in indent notch, second solenoid valve is connect through first through hole with the gas control slide valve.
Preferably, first through hole includes the first air through hole and the first exhaust through hole, and second solenoid valve has the second air inlet
Pipe and the second escape pipe, the second air inlet pipe both ends are connected to the inlet channel of the first air through hole and second solenoid valve, the
Two escape pipe both ends are separately connected the outlet passageway of the first exhaust through hole and second solenoid valve.
Preferably, the lower case is provided with inner groovy, and inner groovy is equipped with sealing ring.
Preferably, switching signal component uses microswitch, and microswitch can be touched by, which being equipped in shaft, generates semaphore
Cam.
Another scheme, switching signal component are used close to switching, and close switch can be touched by, which being equipped in shaft, generates letter
Number amount contact.
Preferably, shaft includes the upper shaft for being installed on upper housing and the lower rotary shaft for being installed on lower case, and upper shaft is under
Shaft is connected by key.
Preferably, the position of the switch display component include rotating cylindrical and cover rotating cylindrical outer end circle sealing
Cover, rotating cylindrical are equipped with the mark opened and closed for identification.
In conclusion the beneficial effects of the present invention are:
1, this programme is novel in design, then realizes control valve using two solenoid valve control gas control slide valves using two solenoid valves
The opening and closing of door, have excellent performance, are more stable, and control is accurate, and applicability can be more wide, meet difference to controller
Demand is also able to satisfy the control in high precision place.
2, sealing fire arrester is arranged in this programme on through-hole and first through hole, and it is low to solve current valve positioner security performance
The problem of, by effectively adding fire arrester, allows entirety to achieve the effect that fire-proof and explosion-proof, solid in gas can also be stopped to enter
To solenoid valve, the service life of solenoid valve is improved.
In conclusion this programme rationally utilizes lower case inner space, the gentle control slide valve of solenoid valve is connected by tracheae mode
It connecing, property without limitations is installed in the position of solenoid valve to be influenced, and it is easy for installation, and there are the filter assemblies for stopping gas, it mentions on the whole
The service life of high product.Product is widely used in petrochemical industry, coal chemical industry, papermaking, the industries such as bio-pharmaceuticals.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is overall structure diagram of the invention.
Fig. 2 is the structural schematic diagram for removing upper housing of Fig. 1.
Fig. 3 is the structural schematic diagram of lower case.
Fig. 4 is the structural schematic diagram of the other direction of lower case.
Fig. 5 is the partial enlarged view in Fig. 4 at A.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention 1-5, technical solution in the embodiment of the present invention carry out it is clear,
It is fully described by, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
Embodiment
As shown in Figures 1 to 5, the invention discloses integral type valve positioner, including main casing, main casing includes passing through
The lower case 1 and upper housing 2 that fastener is connected, lower case 1 have internal cavity, are equipped with shaft 6 in internal cavity, through shaft 6
Rotation generates the switching signal component 7 of switching signal, and upper housing is equipped with position of the switch display component 3, and switching signal component 7 is installed
In shaft side, specifically, switching signal component uses microswitch, and there is microswitch contact chip 71(to have close to switch
Magnetic induction), the contact chip of microswitch can be touched by, which being equipped in shaft, generates the cam 61 of semaphore.Pacify in the lower case
Equipped with the first solenoid valve 9 and by the gas control slide valve 4 of the first solenoid valve 9 control work, gas control slide valve 4 has air inlet port 41, gas
Control slide valve 4 is prior art products, is specifically not described, and the lower case 1 is provided with through-hole, and through-hole is set to 1 side of lower case week
Wall, gas control slide valve 4 have the connector connecting with through-hole, and indent collar extension 120 is equipped on the through-hole, is pacified in indent collar extension 120
Equipped with fire arrester 121, gas control slide valve is mounted on the outside of lower case by fastener, and the first solenoid valve 9 is mounted on by fastener
The internal cavity bottom of lower case is equipped with tracheae between first solenoid valve 9 and gas control slide valve 4, connected by through-hole and tracheae
It connects the gentle control slide valve of the solenoid valve and realizes and be connected, connecting terminal 5, above-mentioned switch letter are also equipped in the lower case 1
Number component 7 and first solenoid valve are connected on connecting terminal, and connecting terminal is connected with controller, are executed pair in via controller
The instruction answered, controller analyze the signal that switching signal component is fed back, and issue action command in via controller, realize logical
Solenoid valve is crossed to control the work of gas control slide valve, the then opening and closing effect of control valve, controller is the prior art, is controlled in the market
Valve positioner processed returns being applicable in for fast device, does not elaborate.
Tracheae includes air inlet pipe 91 and escape pipe 92, and through-hole includes air through hole 11 and exhaust through hole 12, and 91 liang of air inlet pipe
End is connected to the inlet channel of air through hole 11 and the first solenoid valve, and 92 both ends of escape pipe are separately connected 12 He of exhaust through hole
The outlet passageway of first battery valve.
It is that entirety can achieve explosive-proof grade that fire arrester is equipped with inside gas control slide valve and lower case, to gas source fine particle
It is obstructed, greatly promotes the solenoid valve service life, gas control slide valve can under power blackout situation with hand push button device in this design
To use hand push button device open and close valve, security performance is greatly promoted.
This programme is also additionally arranged double automatically controlled control pieces, specifically: it further include having second solenoid valve 8, second solenoid valve 8 and the
One solenoid valve 9 composition is provided with the first of the structure that is the same as through hole in lower case for controlling double automatically controlled control pieces of gas control slide valve 4
Through-hole is provided with indent notch in first through hole, is furnished with fire arrester one in interior groove port, second solenoid valve is through first through hole and institute
State the connection of gas control slide valve.First through hole includes the first air through hole and the first exhaust through hole, and second solenoid valve has the second air inlet
Pipe 81 and the second escape pipe 82, the second air inlet pipe both ends are connected to the first air through hole and the air inlet of second solenoid valve is logical
Road, the second escape pipe both ends are separately connected the outlet passageway of the first exhaust through hole and the second battery valve, and the lower case is provided with
Inner groovy, inner groovy are equipped with sealing ring.
Above scheme is described further: second solenoid valve structure with the first solenoid valve be it is identical, be arranged on through-hole
Fire arrester one (fire arrester and fire arrester one are identical product, i.e., netted annular lamina), filter assemblies are in use, due to gas
Into being certain to carry a little solid matters secretly, tracheae can be followed to enter in solenoid valve, will lead to the closure of electromagnetism valve opening in this way, use
Dual-coil electromagnetic valve control, reliability is high, solves the defect that can not install two solenoid valves at present.
Shaft includes the upper shaft for being installed on upper housing and the lower rotary shaft for being installed on lower case, and upper shaft and lower rotary shaft pass through
Key connection.This programme uses upper and lower rotating shaft mode, easy to disassemble, improves convenience.
The position of the switch display component includes rotating cylindrical and covers the seal closure in rotating cylindrical outer end circle, is rotated
Cylinder is equipped with the mark opened and closed for identification, and seal closure is fabricated for transparent material, and mark is mainly by green and red
Composition, using worker, it can judge the open/close states of current valve by the difference of color.
Working method: in use, being mounted on the shaft on lower case through-hole 10, mainly connection actuator, actuator exist
When rotation, shaft rotation will drive, then drive the cam 61 being mounted in shaft, another scheme, switching signal component is adopted
With close to switching, the contact that semaphore is generated close to switch can be touched by being equipped in shaft.The two alternative, is all up mesh
's.
Cam contacts in shaft rotary course with the contact chip of microswitch 71 close to switch, is transferred to fine motion and opens
It closes, generates a semaphore, solenoid valve is detected according to switching signal amount, then controls the work of gas control slide valve, middle and upper part
The display component divided can show different marks, can directly observe by shaft in rotation, very convenient intuitive.
The dual-coil electromagnetic valve of this programme can control the work of gas control slide valve simultaneously, then realize the switch of control valve, integration
The function of instruction and control realizes integrative installation technology, very convenient reliable.
Simultaneously it may be noted that the term pointed out of the present invention, such as: "front", "rear", "vertical", "horizontal", instruction side
Position or positional relationship are to be based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description of the present invention and simplification of the description,
Rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, because
This should not be understood as limiting the scope of the invention.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. integral type valve positioner, including main casing, main casing includes the lower case being connected by fastener and upper housing,
Lower case has internal cavity, and shaft is equipped in internal cavity, rotates the switching signal component for generating switching signal, upper casing through shaft
Body is equipped with position of the switch display component, and switching signal component is installed on shaft side, it is characterised in that: pacifies in the lower case
Equipped with the first solenoid valve and the gas control slide valve to be worked by the first solenoid valve control, the lower case is provided with through-hole, and through-hole is set to
Lower casing side peripheral wall, gas control slide valve have the connector that connect with through-hole, equipped with indent collar extension on the through-hole, in indent collar extension
Fire arrester is installed, gas control slide valve is mounted on the outside of lower case by fastener, and the first solenoid valve is mounted on down by fastener
The internal cavity bottom of shell is equipped with tracheae, connect institute with tracheae by through-hole between first solenoid valve and gas control slide valve
It states the gentle control slide valve of the first solenoid valve and realizes and be connected, connecting terminal, above-mentioned switching signal are also equipped in the lower case
Component and the first solenoid signal are connected to connecting terminal.
2. integral type valve positioner according to claim 1, it is characterised in that: tracheae includes air inlet pipe and an air outlet pipe, is led to
Hole includes air through hole and exhaust through hole, and air inlet pipe both ends are connected to the inlet channel of air through hole and solenoid valve, outlet
Pipe both ends are separately connected the outlet passageway of exhaust through hole and the first solenoid valve.
3. integral type valve positioner according to claim 2, it is characterised in that: it further include having second solenoid valve, the second electricity
Magnet valve and the first solenoid valve block are provided with the structure that is the same as through hole in lower case at double automatically controlled control pieces for controlling gas control slide valve
First through hole, be provided with indent notch in first through hole, be furnished with fire arrester one in interior groove port, second solenoid valve is logical through first
Hole is connect with the gas control slide valve.
4. integral type valve positioner according to claim 3, it is characterised in that: first through hole includes the first air through hole
With the first exhaust through hole, second solenoid valve has the second air inlet pipe and the second escape pipe, and the second air inlet pipe both ends are connected to
The inlet channel of first air through hole and second solenoid valve, the second escape pipe both ends are separately connected the first exhaust through hole and the second electricity
The outlet passageway of magnet valve.
5. integral type valve positioner according to claim 4, it is characterised in that: the lower case is provided with inner groovy,
Inner groovy is equipped with sealing ring.
6. integral type valve positioner according to claim 1, it is characterised in that: switching signal component is opened using fine motion
It closes, the cam that microswitch generates semaphore can be touched by being equipped in shaft.
7. integral type valve positioner according to claim 1, it is characterised in that: switching signal component uses close open
It closes, the contact that semaphore is generated close to switch can be touched by being equipped in shaft.
8. integral type valve positioner according to claim 1, it is characterised in that: shaft include be installed on upper housing upper turn
Axis and the lower rotary shaft for being installed on lower case, upper shaft and lower rotary shaft are connected by key.
9. according to claim 6 or 7 or the 8 integral type valve positioners, it is characterised in that: the position of the switch display group
Part includes rotating cylindrical and covers the seal closure in rotating cylindrical outer end circle, and rotating cylindrical is equipped with the mark opened and closed for identification
Know.
10. integral type valve positioner according to claim 1, it is characterised in that: the gas control slide valve has and presses manually
Button device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910800264.8A CN110375108A (en) | 2019-08-28 | 2019-08-28 | Integral type valve positioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910800264.8A CN110375108A (en) | 2019-08-28 | 2019-08-28 | Integral type valve positioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110375108A true CN110375108A (en) | 2019-10-25 |
Family
ID=68260957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910800264.8A Pending CN110375108A (en) | 2019-08-28 | 2019-08-28 | Integral type valve positioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110375108A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112856020A (en) * | 2021-01-29 | 2021-05-28 | 无锡隆圣威流体控制设备有限公司 | Pneumatic valve controller |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5865419A (en) * | 1996-03-22 | 1999-02-02 | Worcestor Controls Licenseco, Inc. | Pneumatic actuator having an end mounted control device |
| US20080078462A1 (en) * | 2006-09-29 | 2008-04-03 | Westlock Controls Corporation | Valve controller |
| CN106499860A (en) * | 2016-11-03 | 2017-03-15 | 杭州赛密科阀门制造有限公司 | High stability Explosion-proof valve |
| CN206918322U (en) * | 2017-06-01 | 2018-01-23 | 上海博隆粉体工程有限公司 | A kind of high-pressure reversing valve for being used to distribute powder material conveying direction |
| CN108709005A (en) * | 2018-04-10 | 2018-10-26 | 长春市多为尔流体控制设备有限公司 | Valve positioner for operated pneumatic valve |
| CN108757959A (en) * | 2018-07-20 | 2018-11-06 | 江苏金发科技新材料有限公司 | Applied to the butterfly valve control mechanism in dynamic weighing equipment |
| CN210397892U (en) * | 2019-08-28 | 2020-04-24 | 浙江宝甲金工科技有限公司 | Integrated valve controller |
-
2019
- 2019-08-28 CN CN201910800264.8A patent/CN110375108A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5865419A (en) * | 1996-03-22 | 1999-02-02 | Worcestor Controls Licenseco, Inc. | Pneumatic actuator having an end mounted control device |
| US20080078462A1 (en) * | 2006-09-29 | 2008-04-03 | Westlock Controls Corporation | Valve controller |
| CN106499860A (en) * | 2016-11-03 | 2017-03-15 | 杭州赛密科阀门制造有限公司 | High stability Explosion-proof valve |
| CN206918322U (en) * | 2017-06-01 | 2018-01-23 | 上海博隆粉体工程有限公司 | A kind of high-pressure reversing valve for being used to distribute powder material conveying direction |
| CN108709005A (en) * | 2018-04-10 | 2018-10-26 | 长春市多为尔流体控制设备有限公司 | Valve positioner for operated pneumatic valve |
| CN108757959A (en) * | 2018-07-20 | 2018-11-06 | 江苏金发科技新材料有限公司 | Applied to the butterfly valve control mechanism in dynamic weighing equipment |
| CN210397892U (en) * | 2019-08-28 | 2020-04-24 | 浙江宝甲金工科技有限公司 | Integrated valve controller |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112856020A (en) * | 2021-01-29 | 2021-05-28 | 无锡隆圣威流体控制设备有限公司 | Pneumatic valve controller |
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