KR200170011Y1 - Check valve - Google Patents

Check valve Download PDF

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Publication number
KR200170011Y1
KR200170011Y1 KR2019970008638U KR19970008638U KR200170011Y1 KR 200170011 Y1 KR200170011 Y1 KR 200170011Y1 KR 2019970008638 U KR2019970008638 U KR 2019970008638U KR 19970008638 U KR19970008638 U KR 19970008638U KR 200170011 Y1 KR200170011 Y1 KR 200170011Y1
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KR
South Korea
Prior art keywords
valve
hydraulic cylinder
rotating shaft
rod
pump
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Application number
KR2019970008638U
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Korean (ko)
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KR19980064022U (en
Inventor
김승문
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김승문
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Priority to KR2019970008638U priority Critical patent/KR200170011Y1/en
Publication of KR19980064022U publication Critical patent/KR19980064022U/en
Application granted granted Critical
Publication of KR200170011Y1 publication Critical patent/KR200170011Y1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
    • F16K15/034—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member weight-loaded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
    • F16K15/182—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism
    • F16K15/1821—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism for check valves with a hinged or pivoted closure member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0209—Check valves or pivoted valves
    • 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
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
    • F16K47/023—Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)

Abstract

본 고안은 펌프관로계에서 별도의 동력이 없이 유체의 흐름에 의해 밸브디스크의 개폐속도가 조절되게 하여 과도한 역류로 부터 펌프 및 계통의 시설을 보호할수 있게한 회전식 2속감쇄 체크밸브에 관한 것으로서,The present invention relates to a rotary two-speed attenuated check valve that can protect the pump and the system from excessive backflow by controlling the opening and closing speed of the valve disk by the flow of fluid without a separate power in the pump pipeline system,

체크밸브에 있어서,In the check valve,

밸브본체의 중앙상부 편심된 위치에 회전축을 축설하여 한쪽 회전축를 본체 밖으로 인출하고, 디스크를 유체의 흐름방향에서 75도 경사지게 형성하여 회전축과 고정연결하며 본체 밖으로 인출된 회전축쪽 돌출부에 지지대를 입설하고, 인출된 회전축에 작동간을 고정설치하여 일측에는 중량체을 형성하고 타측에는 연결간을 연결하되,The rotating shaft is laid out at the center of the valve body at an eccentric position to draw out one rotating shaft out of the main body, and the disk is formed to be inclined at 75 degrees in the flow direction of the fluid so as to be fixedly connected to the rotating shaft. By fixing the operation shaft to the drawn rotation shaft to form a weight body on one side and the connection between the other side,

전기 지지대 상부에 헤드측 덮개에 니들밸브가 내장된 유압실린더를 축설하여 유압실린더의 헤드측 연결구에 속도조절밸브를 통하여 대기압의 오일탱크와 연결하고 로드측 연결구에 속도조절밸브를 통하여 압력조정용 오일탱크를 연결하며, 전기 연결간에 유압실린더의 로드를 연결되게 한 것이다.A hydraulic cylinder with a needle valve built in the head cover is installed on the upper part of the electric support, and the oil tank for pressure adjustment is connected to the atmospheric pressure oil tank through the speed control valve at the head side connector of the hydraulic cylinder and the speed control valve at the rod side connector. To connect the rod of the hydraulic cylinder between the electrical connection.

Description

회전식 2속감쇄 체크밸브Rotary 2-Speed Reduction Check Valve

본 고안은 펌프관로계에서 펌프운전중 펌프의 정지 및 정전시 계통의 관로를 통하여 순간적 역류로부터 펌프 및 계통의 시설 보호하기 위한 체크밸브에 관한 것으로, 별도의 동력이 없이 유체의 흐름에 의해 밸브디스크의 개폐속도가 조절되게 하여 과도한 역류로 부터 펌프 및 계통의 시설을 보호할수 있게한 회전식 2속감쇄 체크밸브에 관한 것이다.The present invention relates to a check valve for protecting the pump and the system from the instantaneous backflow through the pipeline of the system when the pump is stopped and power failure during the pump operation in the pump pipeline system, the valve disk by the flow of fluid without additional power This invention relates to a rotary two-speed attenuated check valve that allows the opening and closing speed of the engine to be controlled to protect the pump and the system from excessive backflow.

종래의 직폐식 스윙체크밸브는 펌프관로계에서 펌프의 정지 및 정전시 단순히 역류를 방지하기 위한 목적으로 사용하기 때문에 펌프가 정지하고 흐름이 멈춘후 역류개시와 함께 닫히기 시작하여 체크밸브가 완전히 닫히는 순간에 극심한 충격진동과 순간적으로 역류하는 흐름을 차단하여 수충격으로 인한 높은 압력을 발생시켜 심각한 경우 관이 충격을 받아 파손되는 등의 문제점이 있으며, 또한 완폐식 스윙체크밸브는 밸브가 닫히는 순간의 충격을 줄이거나 역류량을 조정하기 위하여 감쇄장치를 이용하여 단순히 디스크의 폐쇄속도를 느리게 하는 방법을 사용하고 있으나 스윙체크밸브의 구조상 어느정도 이하의 느린 폐쇄속도가 아니면 충격진동을 줄이기 어려우며, 유량제어 역시 밸브가 완전히 닫히기전 10% 전후에서 시작하여 완전히 닫힐 때 까지 이루어지므로 디스크의 폐쇄속도를 너무 느리게 하면 밸브가 완전히 닫히기전까지 과도한 역류를 허용함으로서 펌프 및 전동기의 무리한 역회전 및 케이싱내 압력상승으로 펌프계통의 시설을 파손할뿐 아니라, 폐쇄 직전의 과도한 역류 및 정수두압에 의한 디스크에 걸리는 회전력은 스윙체크밸브의 주요부품 및 감쇄장치의 파괴강도를 훨씬 초과하기 때문에 파괴의 위험이 있어 완폐식 스윙체크밸브의 느린 폐쇄속도의 운용은 실제로 펌프관로계에서 안정하고 원활한 운전이 되지 못하고 있는 실정이다.Conventional direct-acting swing check valves are used for the purpose of simply preventing reverse flow during stop and power outage of the pump in the pipeline, so when the pump stops and flow stops, it starts to close with the start of reverse flow and the check valve is completely closed. The severe shock vibration and instantaneous flow of back flow can be blocked to generate high pressure due to water shock, and the pipe can be damaged due to severe shock. In addition, the fully closed swing check valve has an impact when the valve is closed. In order to reduce the flow rate or adjust the backflow, the method of simply reducing the disk's closing speed by using a damping device is difficult. Is set at around 10% before the valve is fully closed and until it is fully closed, so if the disc closing speed is too slow, excessive back flow will be allowed until the valve is fully closed. In addition to damaging the facility, the rotational force applied to the disk by excessive backflow and hydrostatic head pressure immediately before closing is much higher than the breaking strength of the main parts and damping devices of the swing check valve. Slow closing speed is not the stable and smooth operation in the pump pipeline system actually.

본 고안은 상기와 같은 문제점을 해결하기 위한 것으로,The present invention is to solve the above problems,

밸브본체의 중앙상부에 편심축을 축설하고 유체의 흐름방향에서 약75도 기울어진 디스크를 입설하여 디스크의 개폐가 편심축을 중심으로 회전하면서 양시이트면이 미끄러지듯 작동하게 하여 폐쇄시 충격진 동을 극소화시켰으며, 밸브 폐쇄시 2속도 제어 유압감쇄장치에 의해서 펌프정지후 유체의 흐름이 멈추기 직전부터 역류개시 전후사이에서 밸브디스크를 유량제어 범위까지 급속으로 폐쇄하고 본격적인 역류시점에서부터 완전히 폐쇄될때까지 펌프관로계통의 시스템에 최적의 안정한 폐쇄속도를 부여하여 펌프관로계에서 어떠한 정지 및 정전조건에서도 충격진동이 거의 없이 역류로 인한 수충격을 최소화하여 최적의 운전조건을 제공하기 위한 것이다.An eccentric shaft is installed in the upper part of the valve body and a disk inclined at about 75 degrees in the flow direction of the valve is installed. When the valve is closed, the pump pipe system closes to the flow control range immediately after the stop of the pump and stops the flow of the fluid by the 2-speed control hydraulic damping device. By providing the optimum stable closing speed to the system of the pump to provide the optimum operating conditions by minimizing the water shock due to the backflow with almost no shock vibration in any stop and power outage condition in the pump pipeline system.

도1은 본 고안은 일부를 절개한 사시도.1 is a perspective view of a portion of the present invention incision.

도2는 본 고안의 유압실린더의 개통도.Figure 2 is an opening diagram of the hydraulic cylinder of the present invention.

도3은 본 고안의 정면 설명도.Figure 3 is a front explanatory diagram of the present invention.

도4는 본 고안의 단면 설명도.Figure 4 is a cross-sectional view of the present invention.

(도면의 주요부분에 대한 부호의 설명)(Explanation of symbols on the main parts of drawing

1: 본체, 2: 회전축, 3: 디스크, 4: 작동간, 5: 중량체, 6: 연결간, 7: 니들밸브, 8: 유압실린더, 9: 헤드측연결구, 12: 로드측연결구, 10,13: 속도조절밸브, 11,14: 오일탱크, 15: 로드, 16: 지지대, 17: 돌출부1: main body, 2: rotating shaft, 3: disc, 4: between operation, 5: weight, 6: between connection, 7: needle valve, 8: hydraulic cylinder, 9: head end connection, 12: rod end connection, 10 13: speed control valve, 11, 14: oil tank, 15: rod, 16: support, 17: protrusion

이하, 본 고안의 요지를 첨부 도면에 의하여 상세히 설명하면 다음과 같다.Hereinafter, the gist of the present invention will be described in detail with reference to the accompanying drawings.

체크밸브에 있어서,In the check valve,

밸브본체(1)의 중앙상부 편심된 위치에 회전축(2)을 축설하여 한쪽 회전축(2)를 본체(1) 밖으로 인출하고,Rotating shaft (2) in the eccentric position of the upper center of the valve body (1) to draw out one of the rotating shaft (2) out of the main body (1),

디스크(3)를 유체의 흐름방향에서 75도 경사지게 형성하여 회전축(2)과 고정연결하며 본체(1) 밖으로 인출된 회전축(2)쪽 돌출부(17)에 지지대(16)를 입설하고, 인출된 회전축(2)에 작동간(4)을 고정설치하여 일측에는 중량체(5)을 형성하고 타측에는 연결간(6)을 연결하되,The disk 3 is formed to be inclined at 75 degrees in the flow direction of the fluid to be fixedly connected to the rotation shaft 2, and the support 16 is placed in the projection 17 toward the rotation shaft 2 drawn out of the main body 1, and drawn out. By fixing the operating shaft (4) to the rotating shaft (2) to form a weight (5) on one side and the connecting rod (6) on the other side,

전기 지지대(16) 상부에 헤드측 덮개에 니들밸브(7)가 내장된 유압실린더(8)를 축설하여 유압실린더(8)의 헤드측 연결구(9)에 속도조절밸브(10)를 통하여 대기압의 오일탱크(11)와 연결하고 로드측 연결구(12)에 속도조절밸브(13)를 통하여 압력조정용 오일탱크(14)를 연결하며,A hydraulic cylinder (8) having a needle valve (7) embedded in the head side cover on the upper side of the electric support (16) is built up, and the atmospheric pressure is controlled through the speed control valve (10) to the head side connector (9) of the hydraulic cylinder (8). It is connected to the oil tank 11 and the pressure adjustment oil tank 14 through the speed control valve 13 to the rod side connector 12,

전기 연결간(6)에 유압실린더(8)의 로드(15)를 연결되게 한 것이다.The rod 15 of the hydraulic cylinder 8 is connected to the electrical connection 6.

미설명부호 18은 쿠션공, 19는 수충격완충 밸브, 20은 밸브유입구, 21은 밸브유출구, 22는 통기구, 23은 압력계, 24는 로드돌출부이다.Reference numeral 18 is a cushion hole, 19 is a water shock buffer valve, 20 is a valve inlet, 21 is a valve outlet, 22 is a vent, 23 is a pressure gauge, 24 is a rod protrusion.

이상과 같은 본 고안의 작용효과를 상세히 설명하면 다음과 같다.Referring to the effects of the present invention as described above in detail.

본 고안은 펌프관로계의 펌프에서 토출되는 유체가 밸브유입구(20)으로 부터 디스크(3)를 지나 밸브유출구(21)로 토출되는 유체의 유속과 압력에 의하여 디스크(3)가 힘을 받아 회전되면서 열리게 되는 것인데 디스크(3)에 연결된 회전축(2)이 작동간(4)과 연결간(6)을 통하여 유압실린더(8)의 로드(15)와 연결되어 있으므로 디스크(3)가 상부로 회전되면서 작동간(4)를 회전시키므로 연결간(6)에 연결되어 있는 유압실린더(8)의 로드(15)를 잡아 당기므로 유압실린더(8) 내부의 작동유가 로드측 연결구(12)를 통하여 속도조절밸브(13)를 거쳐 압력조정용 오일탱크(14)를 배출되고 헤드측 연결구(9)를 통해 대기압의 오일탱크(11)내의 작동유가 유압실린더(8)의 내부로 유입되면서 유압실린더(8)의 로드(15)가 하강하면서 디스크(3)가 열리게 되는 것이다.In the present invention, the fluid discharged from the pump of the pump pipe system rotates under the force of the disk 3 by the flow velocity and pressure of the fluid discharged from the valve inlet 20 to the valve outlet 21 through the disk 3. The rotary shaft 2 connected to the disk 3 is connected to the rod 15 of the hydraulic cylinder 8 through the operation 4 and the connection 6 so that the disk 3 rotates upward. While rotating the operation section (4) while pulling the rod 15 of the hydraulic cylinder (8) connected to the connecting section (6), the hydraulic oil inside the hydraulic cylinder (8) through the rod side connector (12) The pressure adjusting oil tank 14 is discharged through the control valve 13, and the hydraulic oil in the oil tank 11 at atmospheric pressure flows into the hydraulic cylinder 8 through the head-side connector 9. As the rod (15) descends The disc (3) will be opened.

이때 유압실린더(8)내의 작동유가 속도조절밸브(13)을 지나 배출되는 유량을 조정하므로서 디스크(3)의 개방속도를 해당 펌프관로계에 적절하게 조절할수 있는 것이다.At this time, by adjusting the flow rate of the hydraulic oil discharged through the speed control valve 13 in the hydraulic cylinder (8) it is possible to appropriately adjust the opening speed of the disk (3) to the pump line system.

이와같이 디스크(3)가 열린상태에서 펌프에 의해 토출되던 유체가 펌프를 정지하거나 정전으로 인하여 펌프가 정지하면 토출되던 유체는 흐름이 멈춘후 밸브유출구(21)를 거쳐 디스크(3)를 지나 밸브유입구(20)쪽으로 역류되게 되고, 그 역류는 디스크(3)를 밀게되고 회전축(2)에 의하여 디스크(3)와 연결된 작동간(4)의 끝단에 형성된 중량체(5)의 자중과 압력조정용 오일탱크(14)내부의 압력에 의해 작동유가 속도조절밸브(13)를 통해 로드측 연결구(12)를 통하여 유압실린더(8)의 내부로 밀어 넣어 피스톤을 들어올려 로드(15)가 당겨지므로 이 로드(15)에 연결된 연결간(6)이 작동간(4)을 거쳐 회전축(2)을 회전시키므로 디스크(3)가 회전력에 의해서 닫히는 것으로 유체의 토출방향의 흐름이 멈추기 전에 디스크(3)가 닫히기 시작하여 유체의 흐름이 멈추고 역류가 시작되는 직후에 디스크(3)가 80-90%까지 급속히 닫히고 본격적인 역류가 시작되는 시점에서 유압실린더(8)의 내부에 있는 로드 돌출부(24)가 쿠션공(18)을 막으며 작동유는 통제된 적은 유량으로 니들밸브(7)로 흐르게됨으로서 피스톤에 연결된 로드(15)는 아주 느린속도로 움직여서 로드(15)에 연결된 연결간(5), 작동간(4), 회전축(2)을 통하여 연결된 디스크(3)는 유체가 역류하는 동안 서서히 닫혀지게 되므로서 역류시 최적의 통제된 유량제어를 함으로서 펌프 정지 및 정전시에 발생할 수 있는 수충격으로 부터 계통의 시설을 안전하게 보호할 뿐만 아니라 펌프의 운전을 원활하게 하는 것이다.When the fluid discharged by the pump stops the pump or the pump stops due to the power failure while the disk 3 is open in this manner, the discharged fluid passes through the valve outlet 21 and passes through the disk 3 through the valve outlet 21 after the flow stops. To the counterpart (20), the countercurrent pushes the disc (3) and the oil for adjusting the weight and pressure of the weight (5) formed at the end of the operation (4) connected to the disc (3) by the rotating shaft (2) Due to the pressure inside the tank 14, the hydraulic oil is pushed into the hydraulic cylinder 8 through the rod-side connector 12 through the speed control valve 13 to lift the piston to pull the rod 15. Since the connecting rod 6 connected to the 15 rotates the rotary shaft 2 via the operating shaft 4, the disk 3 is closed by the rotational force, so that the disc before the flow in the discharge direction of the fluid stops. The rod protrusions 24 inside the hydraulic cylinder 8 at the point where the disc 3 closes rapidly to 80-90% and full back flow begins immediately after (3) begins to close and the flow of fluid stops and backflow begins. ) Blocks the cushion hole 18 and the hydraulic fluid flows to the needle valve 7 at a controlled, low flow rate, such that the rod 15 connected to the piston moves at a very slow speed, between the connections 5 connected to the rod 15, The disc 3 connected between the operation 4 and the rotating shaft 2 is gradually closed while the fluid is flowing backwards, thereby providing optimal controlled flow control during the reverse flow. This is to ensure safe operation of the system as well as smooth operation of the pump.

이상과 같이 본 고안은 니들밸브, 속도조절밸브, 유압실린더로 구성된 감쇄장치에 의해 밸브의 폐쇄조건을 최적화 하므로서,As described above, the present invention optimizes the closing condition of the valve by a damping device composed of a needle valve, a speed control valve, and a hydraulic cylinder.

특히, 대형펌프관로계의 펌프정지 및 정전으로 인한 역류시 발생할수 있는 위험한 수충격으로 부터 인명과 계통의 시설을 안전하게 보호할뿐만 아니라, 펌프의 정상적인 기동과 정지시 순수한 유체의 흐름에 의해서 밸브의 개폐가 이루어지므로서 밸브 조작을 위하여 별도의 동력을 사용하지 않으므로 펌프장 운영경비를 절감하는 효과가 있으며, 펌프의 운전을 정숙히 하므로서 펌프 폐쇄시 극심한 충격진동으로 부터 펌프장 운전에 관련된 설비의 잦은 고장 및 제어계통의 장애로 부터 벗어남으로서 설비의 유지 보수 및 그에 관련된 제반경비를 절감하는 효과가 있다.In particular, it not only protects the life and system of the system from dangerous water shocks that may occur during the back flow due to the pump stoppage or power failure of the large pump pipeline system, but also the pure flow of the valve during normal start-up and stop of the pump. Since the opening and closing is done, it does not use a separate power to operate the valve, which reduces the operating cost of the pumping station. Since the operation of the pump is quiet, frequent failure and control of equipment related to the pumping station operation from extreme shock vibration when closing the pump By deviating from the failure of the system, there is an effect of reducing maintenance and related expenses of the facility.

Claims (1)

체크밸브에 있어서,In the check valve, 밸브본체(1)의 중앙상부 편심된 위치에 회전축(2)을 축설하여 한쪽 회전축(2)를 본체(1) 밖으로 인출하고,Rotating shaft (2) in the eccentric position of the upper center of the valve body (1) to draw out one of the rotating shaft (2) out of the main body (1), 디스크(3)를 유체의 흐름방향에서 75도 경사지게 형성하여 회전축(2)과 고정연결하며 본체(1) 밖으로 인출된 회전축(2)쪽 돌출부(17)에 지지대(16)를 입설하고, 인출된 회전축(2)에 작동간(4)을 고정설치하여 일측에는 중량체(5)을 형성하고 타측에는 연결간(6)을 연결하되,The disk 3 is formed to be inclined at 75 degrees in the flow direction of the fluid to be fixedly connected to the rotation shaft 2, and the support 16 is placed in the projection 17 toward the rotation shaft 2 drawn out of the main body 1, and drawn out. By fixing the operating shaft (4) to the rotating shaft (2) to form a weight (5) on one side and the connecting rod (6) on the other side, 전기 지지대(16) 상부에 헤드측 덮개에 니들밸브(7)가 내장된 유압실린더(8)를 축설하여 유압실린더(8)의 헤드측 연결구(9)에 속도조절밸브(10)를 통하여 대기압의 오일탱크(11)와 연결하고 로드측 연결구(12)에 속도조절밸브(13)를 통하여 압력조정용 오일탱크(14)를 연결하며,A hydraulic cylinder (8) having a needle valve (7) embedded in the head side cover on the upper side of the electric support (16) is built up, and the atmospheric pressure is controlled through the speed control valve (10) to the head side connector (9) of the hydraulic cylinder (8). It is connected to the oil tank 11 and the pressure adjustment oil tank 14 through the speed control valve 13 to the rod side connector 12, 전기 연결간(6)에 유압실린더(8)의 로드(15)를 연결되게함을 특징으로 하는 회전식 2속감쇄 체크밸브.Rotary two-speed deceleration check valve, characterized in that for connecting the rod (15) of the hydraulic cylinder (8) between the electrical connection (6).
KR2019970008638U 1997-04-21 1997-04-21 Check valve KR200170011Y1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100740544B1 (en) * 2005-07-14 2007-07-19 주식회사알피엠텍 Check Valve System
KR200447675Y1 (en) 2009-10-29 2010-02-11 주식회사 승원산업 Accumulator with which a check valve for drains is equipped
WO2016093511A1 (en) * 2014-12-08 2016-06-16 플로우테크 주식회사 Check valve for preventing slam and water hammer
US10352479B2 (en) 2014-05-19 2019-07-16 Flowtech Co., Ltd. Parallel cylinder type check valve

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100502475B1 (en) * 2003-04-15 2005-07-20 주식회사현대밸브 Non return valve

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100740544B1 (en) * 2005-07-14 2007-07-19 주식회사알피엠텍 Check Valve System
KR200447675Y1 (en) 2009-10-29 2010-02-11 주식회사 승원산업 Accumulator with which a check valve for drains is equipped
US10352479B2 (en) 2014-05-19 2019-07-16 Flowtech Co., Ltd. Parallel cylinder type check valve
WO2016093511A1 (en) * 2014-12-08 2016-06-16 플로우테크 주식회사 Check valve for preventing slam and water hammer
CN107002893A (en) * 2014-12-08 2017-08-01 流动科技株式会社 Prevent from fiercelying attack and water slug phenomenon check-valves
US10253895B2 (en) 2014-12-08 2019-04-09 Flowtech Co., Ltd. Check valve for preventing slam and water hammer

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