CN104500796A - Pressure regulating valve - Google Patents
Pressure regulating valve Download PDFInfo
- Publication number
- CN104500796A CN104500796A CN201410639466.6A CN201410639466A CN104500796A CN 104500796 A CN104500796 A CN 104500796A CN 201410639466 A CN201410639466 A CN 201410639466A CN 104500796 A CN104500796 A CN 104500796A
- Authority
- CN
- China
- Prior art keywords
- water
- valve
- pressure
- disc spring
- valve seat
- 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
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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/044—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with more than one spring
-
- 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/048—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded combined with other safety valves, or with pressure control devices
-
- 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention provides a pressure regulating valve, belongs to the technical field of valves and solves the problem such that the existing structured valve has poor pressure regulation effect, has no water return function and is convenient to demount and mount and difficult to maintain. The pressure regulating valve comprises a valve block; the valve block is internally provided with a main valve chamber; one side of the main valve chamber is provided with a water inlet; the other side of the main valve chamber is provided with a non-return valve; the main valve chamber is provided with an overflow valve seat above the water inlet or the water outlet; the overflow valve seat which is hollow can be pushed by high-pressure water; a return chamber is internally provided with a water-stop valve over the overflow valve seat; the valve block is provided with a return opening over the water inlet or the water outlet, the return opening is communicated with an inner cavity of the return chamber, an overflow valve core fitting the overflow valve seat is provided below the overflow valve seat, a disc spring and a disc spring pressure regulating rod are provided above the water-stop valve, and the disc spring is used for controlling the water-stop valve to release pressure. The pressure regulating valve has the advantages such as simplicity in pressure regulation, water return upon over-pressure and convenience in valve assembly.
Description
Technical field
The invention belongs to valve technology field, refer in particular to a kind of pressure regulator valve.
Background technique
Pressure regulator valve is widely used in various building water supply system, fire-fighting system, central air-conditioning system and heating system etc. in people's daily life.In use can be used for arm decompression, pressure of supply water can be made to distribute more balanced, avoid part water supply superpressure, optimize tall building to pool; In fire-fighting system can with high-pressure water pump with the use of, regulate high pressure water to enter the pressure of flexible pipe, protection flexible pipe breaks because hydraulic pressure is excessive.
At present, the voltage regulation function of existing pressure regulator valve is limited, and range of regulation is little, can only with specific high-pressure water pump with the use of, pressure regulation cannot be carried out according to actual conditions, and still be subject to the impact of high pressure water when valve body not water outlet, valve body easily damages, and working life is not long; In addition the valve body of most pressure regulator valve is integral valve body, service time there will be stopping state in long valve body, be inconvenient to clean, aging or damage and repair more difficult once the component in valve body, some cannot keep in repair the waste that will cause resource.
Summary of the invention
The object of this invention is to provide a kind of pressure regulator valve, can with various high-pressure water pump with the use of, and can according to the pressure size controlling water kick amount of valve body inner high voltage water, when not water outlet, valve body is in unloading condition and extends working life, and dismounting, easy to clean, later period maintenance is simple.
The object of the present invention is achieved like this:
A kind of pressure regulator valve, comprise valve body, main valve chamber is provided with in described valve body, the side of main valve chamber is provided with water intake, opposite side is provided with water outlet, water outlet is provided with safety check, main valve chamber on the upside of water intake or water outlet is provided with and can be pushed by high pressure water and the relief valve seat of hollow, water stopping valve is provided with in backwater room on the upside of relief valve seat, valve body on the upside of water intake or water outlet is provided with the backwater mouth with backwater room's inner space, the downside of relief valve seat is provided with the overflow spool coordinated with relief valve seat, press water is communicated with from backing down safety check after water intake enters with water outlet, press water is communicated with backwater mouth from backing down relief valve seat after water intake enters by water stopping valve, the upside of water stopping valve is provided with and controls disc spring and the disc spring pressure adjusting bar that water stopping valve opens pressure.
Above-mentioned a kind of pressure regulator valve, the concrete structure of disc spring and disc spring pressure adjusting bar that described control water stopping valve opens pressure is: relief valve seat apical grafting is blocking water on valve seat, one end apical grafting of disc spring on disc spring seat, the other end apical grafting blocking water on valve seat, the upper end of valve body is bolted with and reaches the disc spring pressure adjusting bar that valve body is interior, withstand on disc spring seat upper end, rotates the adjustable disc spring of disc spring pressure adjusting bar to the pressure of relief valve seat.
Above-mentioned a kind of pressure regulator valve, the concrete structure that described water outlet is provided with safety check is: water outlet is bolted with water output connector, be provided with poppet valve core in water output connector, tapered end and the water outlet opening and closing of poppet valve core are connected, and are provided with Returnning spring between poppet valve core and water output connector.
Above-mentioned a kind of pressure regulator valve, the lower end outside of described overflow spool is bolted with nut, and the overflow spool on the upside of nut is provided with limited ring, is provided with piston between described nut and limited ring, and the nut between piston and valve body is set with Returnning spring.
Above-mentioned a kind of pressure regulator valve, the upside of described piston is provided with Flow Control room, overflow spool between Flow Control room and main valve chamber is provided with leads core retainer plate and Sealing shield ring, the downside of piston is provided with pressure and pushes away room, the pressure room of pushing away is communicated with main valve chamber by the passage arranged on nut and overflow spool, be provided with the cone valve room be connected with safety check between safety check with water outlet, cone valve room is communicated with Flow Control room by inner passage.
Above-mentioned a kind of pressure regulator valve, the concrete structure being provided with water stopping valve in backwater room on the upside of relief valve seat is: the valve seat that blocks water is provided with block water spool and connection and blocks water the through hole of spool and backwater room, and the upside of the spool that blocks water is provided with the Returnning spring of the spool opening and closing that controls to block water.
Above-mentioned a kind of pressure regulator valve, described valve body is split-type structural.
The present invention gives prominence to compared to existing technology and useful technique effect is:
1, pressure regulator valve of the present invention can with various high-pressure water pump with the use of, valve body is provided with and controls disc spring and the disc spring pressure adjusting bar that water stopping valve opens pressure, the hydraulic pressure in valve body can be made to reach normal working by regulating lever according to the hydraulic pressure pressure in valve body, ensure water inlet and go out water budget, avoiding flexible pipe because of the excessive explosion of hydraulic pressure.
2, on valve body of the present invention due to be provided with water stopping valve structure can spray gun in off position time relief valve is opened completely, press water in main valve chamber all flows out from backwater mouth, valve body is allowed to be in unloading condition, reduce the attack of high pressure water to valve body, reduce the damage of valve body, extend the working life of valve body.
3, valve body of the present invention is split type valve body, dismounting, easy to clean, if the component in valve body are long aging or can instantaneously changing when damaging because of service time, ensure that pressure regulator valve can not be scrapped because part damages, extend the working life of pressure regulator valve, later period maintenance is simple and convenient.
Accompanying drawing explanation
Fig. 1 is sectional elevation of the present invention.
Fig. 2 is longitudinal section of the present invention.
Fig. 3 is perspective view of the present invention.
Embodiment
Below in conjunction with accompanying drawing, with specific embodiment, the invention will be further described, see Fig. 1-3:
A kind of pressure regulator valve, comprise valve body 1, main valve chamber 2 is provided with in described valve body 1, the side of main valve chamber 2 is provided with water intake 3, opposite side is provided with water outlet 4, water outlet 4 is provided with safety check 5, main valve chamber 2 on the upside of water intake 3 or water outlet 4 is provided with and can be pushed by high pressure water and the relief valve seat 6 of hollow, water stopping valve 8 is provided with in backwater room 7 on the upside of relief valve seat 6, valve body 1 on the upside of water intake 3 or water outlet 4 is provided with the backwater mouth 31 with backwater room 7 inner space, the downside of relief valve seat 6 is provided with the overflow spool 9 coordinated with relief valve seat 6, press water is communicated with from backing down safety check 5 after water intake 3 enters with water outlet 4, press water is communicated with backwater mouth 31 from backing down relief valve seat 6 after water intake 3 enters by water stopping valve 8, the upside of water stopping valve 8 is provided with and controls disc spring 10 and the disc spring pressure adjusting bar 13 that water stopping valve 8 opens pressure.
The concrete structure of disc spring 10 and disc spring pressure adjusting bar 13 that described control water stopping valve 8 opens pressure is: relief valve seat 6 apical grafting is blocking water on valve seat 11, one end apical grafting of disc spring 10 on disc spring seat 12, the other end apical grafting blocking water on valve seat 11, the upper end of valve body 1 is bolted with and reaches the disc spring pressure adjusting bar 13 that valve body 1 is interior, withstand on disc spring seat 12 upper end, rotates the pressure of the disc spring pressure adjusting adjustable disc spring of bar 13 10 pairs of relief valve seats 6.
The concrete structure that described water outlet 4 is provided with safety check 5 is: water outlet 4 is bolted with water output connector 14, poppet valve core 15 is provided with in water output connector 14, tapered end and water outlet 4 opening and closing of poppet valve core 15 are connected, and are provided with Returnning spring 16 between poppet valve core 15 and water output connector 14.
The lower end outside of described overflow spool 9 is bolted with nut 17, and the overflow spool 9 on the upside of nut 17 is provided with limited ring 18, is provided with piston 19 between described nut 17 and limited ring 18, and the nut 17 between piston 19 and valve body 1 is set with Returnning spring 20.
The upside of described piston 19 is provided with Flow Control room 21, overflow spool 9 between Flow Control room 21 and main valve chamber 2 is provided with leads core retainer plate 22 and Sealing shield ring 23, the downside of piston 19 is provided with pressure and pushes away room 24, pressure is pushed away room 24 and is communicated with main valve chamber 2 by the passage 25 arranged on nut 17 and overflow spool 9, be provided with the cone valve room 26 be connected with safety check 5 between safety check 5 with water outlet 4, cone valve room 26 is communicated with Flow Control room 21 by inner passage 27.
The concrete structure being provided with water stopping valve 8 in backwater room 7 on the upside of relief valve seat 6 is: the valve seat 11 that blocks water is provided with the spool 28 and being communicated with of blocking water and blocks water the through hole 29 of spool 28 and backwater room 7, and the upside of the spool 28 that blocks water is provided with the Returnning spring 30 of spool 28 opening and closing that controls to block water.
Described valve body 1 is split-type structural.
Specific works process of the present invention is as follows:
When the rifle valve of spray gun is opened, press water enters in main valve chamber 2 from water intake 3 and backs down poppet valve core 15 and flow out from water outlet 4, be communicated with main valve chamber 2 by the passage 25 arranged on nut 17 and overflow spool 9 because pressure pushes away room 24, so press the pressure pushed away in room 24 identical with the pressure in main valve chamber 2, because cone valve room 26 is communicated with Flow Control room 21 by inner passage, so the pressure in cone valve room 26 is identical with the pressure in Flow Control room 21, pressure pushes away the pressure that the Returnning spring 20 that nut 17 that room 24 adds between upper piston 19 and valve body 1 be set with overcomes Flow Control room 21 and main valve chamber 2 and is up pushed up by piston 19, overflow spool 9 and relief valve seat 6 is caused to fit tightly, press water in main valve chamber 2 is flowed out from water output connector 14 by poppet valve core 15, cannot from overflow between overflow spool 9 and relief valve seat 6, spray gun is in the course of the work when the hydraulic pressure in main valve chamber 2 is too high, press water backs down relief valve seat 6 and makes to occur gap between relief valve seat and overflow spool 9, press water enters into backwater room 7 by backing down the spool 28 that blocks water from the through hole 29 blocked water valve seat 11 to overflow from gap, press water in backwater room 7 flows out from backwater mouth 31, reaches the object of decompression.
When the rifle valve of spray gun cuts out, press water enters in main valve chamber 2 from water intake 3, now poppet valve core 15 and water outlet 4 are in and are close to state, press water cannot be flowed out from water output connector 14 by poppet valve core 15, the pressure increase in main valve chamber 2 is caused to back down relief valve seat 6, make to produce larger gap between relief valve seat 6 and overflow spool 9, press water in main valve chamber 2 by gap to overflow, pressure water action overcomes the Returnning spring 20 that the nut 17 between piston 19 and valve body 1 is set with active force at the head of overflow spool 9 makes piston 19 to bottom offset, now overflow spool 6 and relief valve seat 9 are opened completely, press water in main valve chamber 2 enters into backwater room 9 by backing down the spool 28 that blocks water from the through hole 19 blocked water valve seat 11 to overflow, press water in backwater room 9 flows out from backwater mouth 31, valve body is made to keep unloading condition.
It is made to move down by rotating disc spring pressure adjusting bar 13, disc spring 10 is shunk, the active force of disc spring 10 pairs of relief valve seats 6 increases, now just can push relief valve seat 6 make press water overflow from the gap between relief valve seat 6 and overflow spool 9 when having higher hydraulic pressure in main valve chamber 2, would not there is the situation of overflow in less hydraulic pressure; It is made to move up by rotating disc spring pressure adjusting bar 13, disc spring 10 is opened, the active force of disc spring 10 pairs of relief valve seats 6 reduces, and now has less hydraulic pressure in main valve chamber 2 and also can push relief valve seat 6 and make press water overflow from the gap between relief valve seat 6 and overflow spool 9.So make it move up or down the active force that can change relief valve seat 6 by rotating disc spring pressure adjusting bar 13, play the effect of pressure regulation.
Above-described embodiment is only preferred embodiment of the present invention, not limits the scope of the invention according to this, therefore: all equivalence changes done according to structure of the present invention, shape, principle, all should be covered by within protection scope of the present invention.
Claims (7)
1. a pressure regulator valve, comprise valve body (1), it is characterized in that: in described valve body, be provided with main valve chamber (2), the side of main valve chamber is provided with water intake (3), opposite side is provided with water outlet (4), water outlet is provided with safety check (5), the main valve chamber of water intake (3) or water outlet (4) upside is provided with and can be pushed by high pressure water and the relief valve seat of hollow (6), water stopping valve (8) is provided with in the backwater room (7) of relief valve seat (6) upside, the valve body of water intake (3) or water outlet (4) upside is provided with the backwater mouth with backwater room's inner space, the downside of relief valve seat is provided with the overflow spool (9) coordinated with relief valve seat, press water is communicated with from backing down safety check after water intake enters with water outlet, press water is communicated with backwater mouth from backing down relief valve seat after water intake enters by water stopping valve, the upside of water stopping valve (8) is provided with and controls disc spring (10) and the disc spring pressure adjusting bar that water stopping valve opens pressure.
2. a kind of pressure regulator valve according to claim 1, it is characterized in that: the concrete structure of disc spring (10) and disc spring pressure adjusting bar that described control water stopping valve opens pressure is: relief valve seat apical grafting is on the valve seat that blocks water (11), one end apical grafting of disc spring is upper at disc spring seat (12), the other end apical grafting is blocking water on valve seat, the upper end of valve body is bolted with and reaches the disc spring pressure adjusting bar (13) that valve body is interior, withstand on disc spring seat upper end, rotates the adjustable disc spring of disc spring pressure adjusting bar to the pressure of relief valve seat.
3. a kind of pressure regulator valve according to claim 1, it is characterized in that: the concrete structure that described water outlet is provided with safety check is: water outlet is bolted with water output connector (14), poppet valve core (15) is provided with in water output connector, tapered end and the water outlet opening and closing of poppet valve core are connected, and are provided with Returnning spring (16) between poppet valve core and water output connector.
4. a kind of pressure regulator valve according to claim 1, it is characterized in that: the lower end outside of described overflow spool is bolted with nut (17), overflow spool on the upside of nut is provided with limited ring (18), be provided with piston (19) between described nut and limited ring, the nut between piston and valve body be set with Returnning spring (20).
5. a kind of pressure regulator valve according to claim 4, it is characterized in that: the upside of described piston is provided with Flow Control room (21), overflow spool between Flow Control room and main valve chamber is provided with leads core retainer plate (22) and Sealing shield ring (23), the downside of piston is provided with pressure and pushes away room (24), the pressure room of pushing away is communicated with main valve chamber by the passage (25) arranged on nut and overflow spool, be provided with the cone valve room (26) be connected with safety check between safety check with water outlet, cone valve room is communicated with Flow Control room by inner passage (27).
6. a kind of pressure regulator valve according to claim 1, it is characterized in that: the concrete structure being provided with water stopping valve in the backwater room on the upside of relief valve seat is: the valve seat that blocks water is provided with the spool that blocks water (28) and is communicated with the through hole (29) of spool and backwater room of blocking water, the upside of the spool that blocks water is provided with control and blocks water the Returnning spring (30) of spool opening and closing.
7. a kind of pressure regulator valve according to any one of claim 1-6, is characterized in that: described valve body is split-type structural.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410639466.6A CN104500796B (en) | 2014-11-13 | 2014-11-13 | Pressure regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410639466.6A CN104500796B (en) | 2014-11-13 | 2014-11-13 | Pressure regulating valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104500796A true CN104500796A (en) | 2015-04-08 |
| CN104500796B CN104500796B (en) | 2017-02-22 |
Family
ID=52942228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410639466.6A Active CN104500796B (en) | 2014-11-13 | 2014-11-13 | Pressure regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104500796B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015675A (en) * | 2016-07-07 | 2016-10-12 | 天津市海盛泵业制造有限公司 | One-way pressure regulating overflow valve with thrust bearing |
| CN108999778A (en) * | 2018-10-26 | 2018-12-14 | 河南伯淼水处理有限公司 | A kind of Novel high-pressure pump combination valve |
| CN109699353A (en) * | 2019-03-04 | 2019-05-03 | 郑州海力特农林科技有限公司 | Greenhouse heavy pressure fine spray cooling humidification and Foliar Spraying device |
| CN112524113A (en) * | 2020-11-30 | 2021-03-19 | 重庆红江机械有限责任公司 | Hydraulic pressure stabilizing valve |
| CN113090792A (en) * | 2021-03-31 | 2021-07-09 | 浙江大农机器有限公司 | Pressure-regulating unloading valve |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2626621Y (en) * | 2003-06-28 | 2004-07-21 | 梁小恩 | Water automatically returning control valve of powered sprayer |
| CN201944356U (en) * | 2011-01-04 | 2011-08-24 | 句容市天龙机械制造厂 | Plunger type safety valve |
| CN203463740U (en) * | 2013-08-23 | 2014-03-05 | 宁波恒瑞机械有限公司 | Pressure regulating and unloading valve |
| CN203686281U (en) * | 2014-01-17 | 2014-07-02 | 安徽金达利液压有限公司 | Ultrahigh-pressure water overflow valve |
| CN204253963U (en) * | 2014-11-13 | 2015-04-08 | 浙江大农实业股份有限公司 | Pressure regulator valve |
-
2014
- 2014-11-13 CN CN201410639466.6A patent/CN104500796B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015675A (en) * | 2016-07-07 | 2016-10-12 | 天津市海盛泵业制造有限公司 | One-way pressure regulating overflow valve with thrust bearing |
| CN106015675B (en) * | 2016-07-07 | 2018-04-24 | 天津市海盛泵业制造有限公司 | A kind of one-way pressure-regulating overflow valve with thrust bearing |
| CN108999778A (en) * | 2018-10-26 | 2018-12-14 | 河南伯淼水处理有限公司 | A kind of Novel high-pressure pump combination valve |
| CN108999778B (en) * | 2018-10-26 | 2024-04-05 | 河南伯淼水处理有限公司 | Novel liquid inlet and outlet valve for high-pressure pump |
| CN109699353A (en) * | 2019-03-04 | 2019-05-03 | 郑州海力特农林科技有限公司 | Greenhouse heavy pressure fine spray cooling humidification and Foliar Spraying device |
| CN112524113A (en) * | 2020-11-30 | 2021-03-19 | 重庆红江机械有限责任公司 | Hydraulic pressure stabilizing valve |
| CN113090792A (en) * | 2021-03-31 | 2021-07-09 | 浙江大农机器有限公司 | Pressure-regulating unloading valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104500796B (en) | 2017-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104500796A (en) | Pressure regulating valve | |
| CN104329485B (en) | A kind of Multifunctional combined valve | |
| CN202209455U (en) | Safe power-driven pressure releasing and holding valve | |
| CN203926951U (en) | The special three-in-one adjustable pressure safety value of water heater | |
| CN103363156B (en) | A kind of multifunctional safety valve | |
| US8408242B2 (en) | Overflow shutoff valve | |
| CN103759069A (en) | Cavitation prevention large pressure difference adjustable pressure reducing valve | |
| CN204253963U (en) | Pressure regulator valve | |
| CN201748001U (en) | Withdrawable pressure reducing valve | |
| CN104500791A (en) | Power-assistance lift check valve | |
| CN201739592U (en) | Multifunctional reducing valve | |
| CN204164420U (en) | A kind of Multifunctional combined valve | |
| CN204267810U (en) | A kind of diaphragm water hammer-resistant preaction valve | |
| CN103899807B (en) | The low maintenance type pressure release/holding valve of external spring | |
| CN207333846U (en) | A kind of voltage-regulation type pipeline blowdown valve | |
| RU108983U1 (en) | SHUT-OFF START-UP DEVICE FOR A MINING FIRE CRANE | |
| CN204345011U (en) | A kind of underwater drainage air valve | |
| CN203836304U (en) | High-pressure safety pilot valve | |
| CN103423485B (en) | A kind of multifunctional safety valve | |
| CN204543360U (en) | A kind of fire pump adapter | |
| CN101983782B (en) | High-pressure water cleaning device | |
| CN204478487U (en) | A kind of water-control device of Teat pump boiler | |
| CN205494755U (en) | From letting out fire -fighting hose reel that prevents frostbite | |
| CN205494750U (en) | Fast opening from letting out fire gun | |
| CN203848397U (en) | Safety blocking pressure adjusting device for warming device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |