WO2020084627A1 - Water discharging device - Google Patents

Water discharging device Download PDF

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Publication number
WO2020084627A1
WO2020084627A1 PCT/IN2018/050680 IN2018050680W WO2020084627A1 WO 2020084627 A1 WO2020084627 A1 WO 2020084627A1 IN 2018050680 W IN2018050680 W IN 2018050680W WO 2020084627 A1 WO2020084627 A1 WO 2020084627A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
water
discharging device
water discharging
extension
Prior art date
Application number
PCT/IN2018/050680
Other languages
French (fr)
Inventor
Dharam Vir
Sajjan Kumar
Kuldeep Sharma
Original Assignee
Mahle Anand Filter Systems Private Limited
Mahle International Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mahle Anand Filter Systems Private Limited, Mahle International Gmbh filed Critical Mahle Anand Filter Systems Private Limited
Priority to PCT/IN2018/050680 priority Critical patent/WO2020084627A1/en
Publication of WO2020084627A1 publication Critical patent/WO2020084627A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/24—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by water separating means
    • F02M37/26—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by water separating means with water detection means
    • F02M37/28—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by water separating means with water detection means with means activated by the presence of water, e.g. alarms or means for automatic drainage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D36/00—Filter circuits or combinations of filters with other separating devices
    • B01D36/003—Filters in combination with devices for the removal of liquids
    • B01D36/005—Liquid level sensing means, e.g. for water in gasoil-filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D36/00—Filter circuits or combinations of filters with other separating devices
    • B01D36/003—Filters in combination with devices for the removal of liquids
    • B01D36/006—Purge means
    • 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
    • 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
    • F16K31/18—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float
    • F16K31/20—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float actuating a lift valve
    • F16K31/22—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float actuating a lift valve with the float rigidly connected to the valve

Definitions

  • the present invention relates to a water discharging device, in particular in a fuel tank or a filter device, according to the preamble of Claim 1.
  • the invention further relates to a filter device, in particular a diesel fuel filter, having such a water discharging device.
  • a water discharging device of the generic type having a water collection chamber and having a valve device for draining water out of the water collection chamber.
  • the valve device is here disposed in a drain line and is controllable by means of a control device.
  • at least three water sensors which are connected in a communicating manner to the control device, are provided.
  • the first water sensor is here disposed above the second water sensor in the region of the water collection chamber, whilst the third water sensor is disposed beneath the first and second water sensor in the region of the drain line.
  • the control device here opens the valve device, insofar as the first water sensor detects water and generates a warning signal, or closes the valve device, insofar as the second and/or the third water sensor no longer detect any water.
  • a fuel filter apparatus having a return line connecting a lower chamber and a fuel tank is known.
  • a non-return valve is here opened automatically, insofar as a low-pressure pump is operated and the fuel pressure in a housing is higher than the atmospheric pressure.
  • a further water discharging device is known from US 2016/0296862 A1 , as well as from US 2017/0021295 A1.
  • a drawback with water discharging devices known from the prior art is that their valve devices are often controlled via a control device which requires a comparatively high control complexity and cost expenditure.
  • the present invention therefore addresses the problem of defining for a water discharging device of the generic type an improved, or at least alternative embodiment, which in particular overcomes the drawbacks known from the prior art.
  • the present invention is based on the general notion of, for the first time, equipping a water discharging device for discharging water from a water collection chamber with a valve device which is not controlled by means of an expensive control device of complex design, but which has a float valve which is inexpensive and works automatically and is biased into its closed position by means of a spring.
  • a spring-biased float valve of this type By means of a spring-biased float valve of this type, the risk of an undesirable water discharge or of an undesirable discharge of liquid, such as, for instance, diesel fuel, can likewise be reliably avoided.
  • a valve device which makes do without a separate control device and can thereby be realized comparatively cheaply and in simple design.
  • the float valve Via the spring, the float valve is constantly biased into its closed position, so that the valve device only opens once a predefined water level, at which a buoyancy force is greater than a spring force that closes the float valve, has been reached, and closes again once a lower water level has been reached.
  • the float valve has a floating body, which is connected to a valve body via an extension.
  • a valve body of this type here cooperates with an annular valve seat disposed on a housing of the valve device.
  • the floating body can be configured as an inexpensive plastics hollow body, wherein a volume of the hollow body is geared in such a way to the force of the spring that a predefined opening of the valve device and a predefined closing of the same takes place at a likewise predefined water level in the water collection chamber.
  • a floating body of this type can here be of comparatively simple configuration.
  • valve body is of pot-shaped configuration and connected to the extension.
  • valve device has a housing having an annular valve seat, in which the valve body engages with an annular sealing rim, that is to say a pot rim. A particularly tight-closing valve can hereby be attained.
  • the spring is supported at one end against the extension and at the other end against the housing and is held, for instance, simply by a locking element, for instance a washer connected to the extension.
  • a locking element for instance a washer connected to the extension.
  • This washer can be slipped onto the extension.
  • the housing has a water discharge duct, in which a guide for the extension is disposed.
  • the guide, the valve seat and the housing can here be configured in one piece, in particular as a one-piece plastics injection-moulded part.
  • the present invention is further based on the general notion of equipping a filter device with such a water discharging device, and of thereby significantly reducing a control complexity which has hitherto been necessary for water discharging devices of this type and making the entire filter device less costly. Further important features and advantages of the invention emerge from the sub claims, from the drawings and from the associated description of the figures with reference to the drawings.
  • Fig. 1 shows a sectional representation through a water discharging device according to the invention in a filter device according to the invention, with closed valve device,
  • Fig. 2 shows a representation as in Fig. 1 , but with opened valve device.
  • a water discharging device 1 which can be disposed, for instance, in a fuel tank 2 or in a filter device 3, in particular in a diesel fuel filter 4, has a water collection chamber 5 and a valve device 6 for draining water 7 out of the water collection chamber 5.
  • the valve device 6 now has a float valve 9, which is spring-biased into its closed position by means of a spring 8.
  • valve device 6 can be wholly dispensed with, since an opening of the valve device 6 is realized in dependence on the water level in the water collection chamber 5, on the basis of the then floating float valve 9 or the floating body 10 thereof, whilst a closing of the valve device 6 is likewise realized in dependence on the water level in the water collection chamber 5 and aided by means of the spring force provided by the spring 8.
  • the spring force which is exerted by the spring 8 and which biases the valve device 6 into its closed position is here shown to be greater than the buoyancy force of the floating body 10.
  • the buoyancy force of the floating body 10 is greater than the spring force exerted by the spring 8, whereby a valve body 1 1 of the valve device 6 is lifted off a valve seat 12 and the water 7 is discharged via a water discharge duct 13.
  • the floating body 10 can here be configured as an inexpensive plastics hollow component.
  • valve body 10 of the float valve 9 is connected via an extension 14, for instance a valve rod, to the valve body 1 1.
  • the valve body 1 1 itself is here of pot-shaped configuration and connected to the extension 14, in particular is even constructed in one piece with the latter.
  • the valve device 6 additionally has a housing 5 having the annular valve seat 12, in which latter the valve body 1 1 engages with its annular sealing rim 16.
  • the spring 8 is here supported at one end against the extension 14 and at the other end against the housing 15.
  • the extension 14 is of two-piece configuration and is configured beneath the valve body 1 1 as a built-on part, wherein it is also conceivable, of course, that the extension 14 both above and beneath the valve body 1 1 , together with the valve body 1 1 , are configured in one piece.
  • the housing 15 has the aforementioned water discharge duct 13, in which a guide 17 is provided for the extension 14.
  • the guide 17, the valve seat 12 and the housing 15 are here preferably configured in one piece, in particular as a one- piece plastics injection-moulded part, and hence can be produced not only in high quality, but, moreover, also at low cost.
  • the floating body 10, the extension 14 and the valve body 1 1 can be produced in one piece, in particular as a one- piece plastics injection-moulded part.
  • a fitting of the valve device 6 according to the invention is here realized as follows: Firstly, the float valve 9 is placed with its extension 14 through the guide 17 of the housing 15. After this, the spring 8 is mounted from below onto the extension 14 and fixed by means of a locking washer or a locking ring 18. The spring 8 is here supported, on the one hand, against the housing 15 and, on the other hand, against the extension 14 and biases the valve body 1 1 against the valve seat 12, that is to say the valve device 6 into its closed position.
  • a water discharging device 1 which is of simple construction in terms of design and is cheap to produce, and which can be used in all possible filter devices 3, for instance diesel fuel filter devices 4, is able to be provided.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)

Abstract

The invention relates to a water discharging device (1), in particular in a fuel tank(2) or a filter device (3), having- a water collection chamber (5),- a valve device (6) for draining water (7) out of the water collection chamber (5).Fundamental to the invention is here that the valve device (6) has a float valve (9)biased into its closed position by means of a spring (8).

Description

WATER DISCHARGING DEVICE
The present invention relates to a water discharging device, in particular in a fuel tank or a filter device, according to the preamble of Claim 1. The invention further relates to a filter device, in particular a diesel fuel filter, having such a water discharging device.
From DE 10 2009 052 301 A1 , a water discharging device of the generic type, having a water collection chamber and having a valve device for draining water out of the water collection chamber, is known. The valve device is here disposed in a drain line and is controllable by means of a control device. In addition, at least three water sensors, which are connected in a communicating manner to the control device, are provided. The first water sensor is here disposed above the second water sensor in the region of the water collection chamber, whilst the third water sensor is disposed beneath the first and second water sensor in the region of the drain line. The control device here opens the valve device, insofar as the first water sensor detects water and generates a warning signal, or closes the valve device, insofar as the second and/or the third water sensor no longer detect any water. As a result, in particular the risk of inadvertent contamination of the environment is intended to be reduced.
From DE 10 2013 100 415 A1 , a fuel filter apparatus having a return line connecting a lower chamber and a fuel tank is known. A non-return valve is here opened automatically, insofar as a low-pressure pump is operated and the fuel pressure in a housing is higher than the atmospheric pressure.
A further water discharging device is known from US 2016/0296862 A1 , as well as from US 2017/0021295 A1. A drawback with water discharging devices known from the prior art is that their valve devices are often controlled via a control device which requires a comparatively high control complexity and cost expenditure.
The present invention therefore addresses the problem of defining for a water discharging device of the generic type an improved, or at least alternative embodiment, which in particular overcomes the drawbacks known from the prior art.
This problem is solved according to the invention by the subject of independent Claim 1. Advantageous embodiments are the subject of the dependent claims.
The present invention is based on the general notion of, for the first time, equipping a water discharging device for discharging water from a water collection chamber with a valve device which is not controlled by means of an expensive control device of complex design, but which has a float valve which is inexpensive and works automatically and is biased into its closed position by means of a spring. By means of a spring-biased float valve of this type, the risk of an undesirable water discharge or of an undesirable discharge of liquid, such as, for instance, diesel fuel, can likewise be reliably avoided. Moreover, there can hence be created a valve device which makes do without a separate control device and can thereby be realized comparatively cheaply and in simple design.
Via the spring, the float valve is constantly biased into its closed position, so that the valve device only opens once a predefined water level, at which a buoyancy force is greater than a spring force that closes the float valve, has been reached, and closes again once a lower water level has been reached.
In an advantageous refinement of the solution according to the invention, the float valve has a floating body, which is connected to a valve body via an extension. A valve body of this type here cooperates with an annular valve seat disposed on a housing of the valve device. The floating body can be configured as an inexpensive plastics hollow body, wherein a volume of the hollow body is geared in such a way to the force of the spring that a predefined opening of the valve device and a predefined closing of the same takes place at a likewise predefined water level in the water collection chamber. A floating body of this type can here be of comparatively simple configuration.
In a further advantageous embodiment of the solution according to the invention, the valve body is of pot-shaped configuration and connected to the extension. In addition, the valve device has a housing having an annular valve seat, in which the valve body engages with an annular sealing rim, that is to say a pot rim. A particularly tight-closing valve can hereby be attained.
In a further advantageous embodiment of the solution according to the invention, the spring is supported at one end against the extension and at the other end against the housing and is held, for instance, simply by a locking element, for instance a washer connected to the extension. This washer can be slipped onto the extension. As a result, a fitting of the valve device can be made simple and hence inexpensive.
In a further advantageous embodiment of the solution according to the invention, the housing has a water discharge duct, in which a guide for the extension is disposed. The guide, the valve seat and the housing can here be configured in one piece, in particular as a one-piece plastics injection-moulded part. As a result, the possibility exists of producing these components extremely cheaply.
The present invention is further based on the general notion of equipping a filter device with such a water discharging device, and of thereby significantly reducing a control complexity which has hitherto been necessary for water discharging devices of this type and making the entire filter device less costly. Further important features and advantages of the invention emerge from the sub claims, from the drawings and from the associated description of the figures with reference to the drawings.
Self-evidently, the above-stated features and the features which are yet to be set out below are usable not only in the respectively stated combination, but also in other combinations or in isolation without departing from the scope of the present invention.
Preferred illustrative embodiments of the invention are represented in the drawings and are explained in greater detail in the following description, wherein same reference symbols relate to same or similar or functionally identical components.
In the drawings, respectively schematically:
Fig. 1 shows a sectional representation through a water discharging device according to the invention in a filter device according to the invention, with closed valve device,
Fig. 2 shows a representation as in Fig. 1 , but with opened valve device.
In accordance with Figures 1 and 2, a water discharging device 1 according to the invention, which can be disposed, for instance, in a fuel tank 2 or in a filter device 3, in particular in a diesel fuel filter 4, has a water collection chamber 5 and a valve device 6 for draining water 7 out of the water collection chamber 5. According to the invention, the valve device 6 now has a float valve 9, which is spring-biased into its closed position by means of a spring 8. As a result, a hitherto necessary control device for controlling, that is to say for opening and closing, the valve device 6 can be wholly dispensed with, since an opening of the valve device 6 is realized in dependence on the water level in the water collection chamber 5, on the basis of the then floating float valve 9 or the floating body 10 thereof, whilst a closing of the valve device 6 is likewise realized in dependence on the water level in the water collection chamber 5 and aided by means of the spring force provided by the spring 8.
If Figure 1 is considered, then the spring force which is exerted by the spring 8 and which biases the valve device 6 into its closed position is here shown to be greater than the buoyancy force of the floating body 10. In the case of the situation represented according to Figure 2, the buoyancy force of the floating body 10 is greater than the spring force exerted by the spring 8, whereby a valve body 1 1 of the valve device 6 is lifted off a valve seat 12 and the water 7 is discharged via a water discharge duct 13. The floating body 10 can here be configured as an inexpensive plastics hollow component.
If Figures 1 and 2 are further considered, then it can be seen that the floating body 10 of the float valve 9 is connected via an extension 14, for instance a valve rod, to the valve body 1 1. The valve body 1 1 itself is here of pot-shaped configuration and connected to the extension 14, in particular is even constructed in one piece with the latter.
The valve device 6 additionally has a housing 5 having the annular valve seat 12, in which latter the valve body 1 1 engages with its annular sealing rim 16. The spring 8 is here supported at one end against the extension 14 and at the other end against the housing 15. In the illustrated embodiments, the extension 14 is of two-piece configuration and is configured beneath the valve body 1 1 as a built-on part, wherein it is also conceivable, of course, that the extension 14 both above and beneath the valve body 1 1 , together with the valve body 1 1 , are configured in one piece.
The housing 15 has the aforementioned water discharge duct 13, in which a guide 17 is provided for the extension 14. The guide 17, the valve seat 12 and the housing 15 are here preferably configured in one piece, in particular as a one- piece plastics injection-moulded part, and hence can be produced not only in high quality, but, moreover, also at low cost. Also the floating body 10, the extension 14 and the valve body 1 1 can be produced in one piece, in particular as a one- piece plastics injection-moulded part.
A fitting of the valve device 6 according to the invention is here realized as follows: Firstly, the float valve 9 is placed with its extension 14 through the guide 17 of the housing 15. After this, the spring 8 is mounted from below onto the extension 14 and fixed by means of a locking washer or a locking ring 18. The spring 8 is here supported, on the one hand, against the housing 15 and, on the other hand, against the extension 14 and biases the valve body 1 1 against the valve seat 12, that is to say the valve device 6 into its closed position.
With the water discharging device 1 according to the invention, a water discharging device 1 which is of simple construction in terms of design and is cheap to produce, and which can be used in all possible filter devices 3, for instance diesel fuel filter devices 4, is able to be provided.

Claims

We claim:
1. Water discharging device (1 ), in particular in a fuel tank (2) or a filter device (3), having
- a water collection chamber (5),
- a valve device (6) for draining water (7) out of the water collection chamber (5), characterized
in that the valve device (6) has a float valve (9) biased into its closed position by means of a spring (8).
2. Water discharging device according to Claim 1 ,
characterized
in that the float valve (9) has a floating body (10), which is connected to a valve body (1 1 ) via an extension (14).
3. Water discharging device according to Claim 2,
characterized
in that the valve body (1 1 ) is of pot-shaped configuration and connected to the extension (14).
4. Water discharging device according to Claim 3,
characterized
in that the valve device (6) has a housing (15) having an annular valve seat (12), in which the valve body (1 1 ) engages with an annular sealing rim (16).
5. Water discharging device according to Claim 4,
characterized in that the spring (8) is supported at one end against the extension (14) and at the other end against the housing (15).
6. Water discharging device according to Claim 4 or 5,
characterized
in that the housing (15) has a water discharge duct (13), in which a guide (17) for the extension (14) is disposed.
7. Water discharging device according to Claim 6,
characterized
in that the guide (17), the valve seat (12) and the housing (15) are configured in one piece, in particular as a one-piece plastics injection-moulded part.
8. Filter device (3), in particular a diesel fuel filter (4), having a water discharging device (1 ) according to one of Claim 1 to 7.
PCT/IN2018/050680 2018-10-22 2018-10-22 Water discharging device WO2020084627A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IN2018/050680 WO2020084627A1 (en) 2018-10-22 2018-10-22 Water discharging device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IN2018/050680 WO2020084627A1 (en) 2018-10-22 2018-10-22 Water discharging device

Publications (1)

Publication Number Publication Date
WO2020084627A1 true WO2020084627A1 (en) 2020-04-30

Family

ID=64477234

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2018/050680 WO2020084627A1 (en) 2018-10-22 2018-10-22 Water discharging device

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1852246A (en) * 1931-02-06 1932-04-05 Albert G Mccaleb Automatic drain
JPS60135659A (en) * 1984-07-25 1985-07-19 Sanshin Ind Co Ltd Automatic discharging device for water separated in fuel filter
GB2276700A (en) * 1993-04-03 1994-10-05 Stephen William Lacey Automatic fluid trap and draining unit
DE10350781A1 (en) * 2002-12-30 2004-07-29 Robert Bosch Gmbh Fuel filter
DE102009052301A1 (en) 2009-11-09 2011-05-12 Mahle International Gmbh Water discharging device for use in e.g. fuel filter, has control unit opening valves when first sensor detects water, and closing valves when second and third sensors do not detect water
DE102013100415A1 (en) 2012-01-24 2013-07-25 Denso Corporation Dehydration device for fuel filtering apparatus of manifold type fuel injection system used in diesel engine of vehicle, has return line that is provided to connect inner space of housing and inner space of fuel tank
US20160296862A1 (en) 2015-04-09 2016-10-13 Clarcor Engine Mobile Solutions, Llc Automatic Water Drain System and Method
US20170021295A1 (en) 2013-11-29 2017-01-26 Donaldson Company, Inc. Fuel filter assembly, filter element and method for draining water from a fuel filter assembly
WO2019081693A1 (en) * 2017-10-27 2019-05-02 Mann+Hummel Gmbh Discharge control device for a filter system, and filter system having a discharge control device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1852246A (en) * 1931-02-06 1932-04-05 Albert G Mccaleb Automatic drain
JPS60135659A (en) * 1984-07-25 1985-07-19 Sanshin Ind Co Ltd Automatic discharging device for water separated in fuel filter
GB2276700A (en) * 1993-04-03 1994-10-05 Stephen William Lacey Automatic fluid trap and draining unit
DE10350781A1 (en) * 2002-12-30 2004-07-29 Robert Bosch Gmbh Fuel filter
DE102009052301A1 (en) 2009-11-09 2011-05-12 Mahle International Gmbh Water discharging device for use in e.g. fuel filter, has control unit opening valves when first sensor detects water, and closing valves when second and third sensors do not detect water
DE102013100415A1 (en) 2012-01-24 2013-07-25 Denso Corporation Dehydration device for fuel filtering apparatus of manifold type fuel injection system used in diesel engine of vehicle, has return line that is provided to connect inner space of housing and inner space of fuel tank
US20170021295A1 (en) 2013-11-29 2017-01-26 Donaldson Company, Inc. Fuel filter assembly, filter element and method for draining water from a fuel filter assembly
US20160296862A1 (en) 2015-04-09 2016-10-13 Clarcor Engine Mobile Solutions, Llc Automatic Water Drain System and Method
WO2019081693A1 (en) * 2017-10-27 2019-05-02 Mann+Hummel Gmbh Discharge control device for a filter system, and filter system having a discharge control device

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