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Common trouble and treatment of one-way valve

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Common trouble and treatment of one-way valve

Date of release:2019-06-15 Author: Click:

One-way valve also known as check valve or reverse check valve.Used to prevent reverse flow of oil in hydraulic systems or to prevent reverse flow of compressed air in pneumatic systems.

One-way valve has straight and right Angle type two.Straight through one-way valve is installed on the pipeline with a threaded connection.Right-angle one-way valve has screw connection, plate connection and flange connection three forms.Hydraulic control check valve is also known as a closed valve or pressure valve, it is the same as the check valve, to prevent the reverse flow of oil.However, when oil flow in the hydraulic circuit needs to be reversed, the oil pressure can be controlled and the one-way valve can be opened so that the oil flow can flow in both directions.Hydraulic control one-way valve USES a cone spool, so the sealing performance is good.This valve can be used as a one-way lock of the oil circuit to maintain pressure when the oil circuit is required to be closed.Hydraulic control one-way valve control oil leakage mode has two kinds of internal and external leakage.It can be used in the oil pipeline without back pressure at the reverse outlet of oil flow.Otherwise, leakage type is required to reduce the control oil pressure.

Common faults and treatment methods

Common faults hydraulic power unit

(1) disc break;(2) medium backflow.

Causes of disc breakage

Check valve front and rear media pressure is near balance and "saw" each other, the disc often with the seat beat, some brittle materials (such as cast iron, brass, etc.) disc is broken.Prevention is to use the disc as a resilient material check valve.

The cause of medium backflow of ningbo automobile lifting power unit

(1) sealing cover destruction;(2) clamping impurities.Repairing the sealing surface and cleaning impurities can prevent backflow.Purpose and characteristics of double swing check valves the function of swing check valves is to prevent media backflow in the pipeline.The check valve belongs to the automatic valve class, the opening and closing parts depend on the power of the fluid medium to lift from the automobile power unit structure one-way valve common faults and treatment methods

Row on or off.Check valves are only used for one-way flow of media on the pipeline to prevent the backflow of media to prevent accidents.The American standard check valves produced by our company are designed and manufactured according to ANSI B16.34 standard.Varieties are: swing check valve, lift check valve, lift vertical check valve;Class 150lB ~ 900Lb;NPS 1" ~ 28" operating temperature -40 ~ 570℃;Valve body materials: WCB, WC1, WC6, WC9, C5, CF3, CF8, CF3M, CF8M, etc.Swing check valve applicable media: water, steam, oil, nitric acid, strong oxidation medium and urea.Widely used in power plants, petroleum, chemical, pharmaceutical, food and other industries.Can be used directly with imported equipment.The sandwich check valve is suitable for nominal pressure pn1.0mpa ~ 42.0mpa, Class150 ~ 2500;Nominal size DN12 ~ 1200mm, nps1/2 ~ 48;Operating temperature -196 ~ 540℃ of various pipelines, used to prevent media backflow.Through the selection of different materials, can be used in water, steam, oil, nitric acid, acetic acid, strong oxidation and urea and other media.

单向阀的常见故障及处理方法


 

单向阀的常见故障及处理方法

  


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Contact:Cao jingshan

Phone:13586888865

Tel:0574-86301550

E-mail:cjs@nb-entiandi.com

Address:No. 6007, zhenpu road, xiepu town, zhenhai district, Ningbo


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