Mounting and Operating Instructions EB 2555 EN
Contents
1. in the Internet at www samson de To allow SAMSON to find the fault and to have an idea of the installation situation specify the following details refer to the nameplate Type and nominal size of the valve Model number with index Upstream and downstream pressures Temperature and process medium Min and max flow rates Has a strainer been installed Installation drawing with exact location of the regulator and all additionally installed components shut off valves pressure gauges 2555 7 SAMSON AG MESS UND REGELTECHNIK Weismillerstrafse 3 60314 Frankfurt am Germany Phone 49 69 4009 0 Fax 49 69 4009 1507 Internet http www samson de EB 2555 EN 2011 112. Self operated Pressure Regulators Pressure Reducing Valves Type 50 ES Type 50 EM Type 50 ES Fig 1 Pressure reducing valves Mounting and Operating Instructions EB 2555 EN Edition November 201 1 Safety instructions General safety instructions The regulators must be installed started up and serviced by fully trained and qualified personnel only observing the accepted industry codes and practices Make sure employees or third persons are not exposed to any danger All safety instructions and warnings in these instructions particularly those concerning installation start up and maintenance must be observed For appropriate operation make sure that the regulator is only used in applications where the operating pressure and temperatures do not exceed the operating values based on the sizing data submitted in the order Note that the manufacturer does not assume any responsibility for damage caused by external forces or any other external factors Any hazards which could be caused in the regulator by the process medium or operating pressure are to be prevented by means of appropriate measures Proper shipping and appropriate storage are assumed Definition of the signal words used in these mounting and operating instructions NOTICE Indicates a property damage warning Note Indicates supplementary explanations infor mation and hints 2 2555 EN 1 Design and principle of operation The pressur
3. ar especially at the seat and plug Depending on the application conditions that prevail the valve must be inspected at appro priately scheduled intervals to prevent any problems before they occur If the valve does not shut off properly this may be due to dirt between the seat and plug preventing tight shut off or due to wear If external leakage occurs check the operat ing diaphragm for leaks and replace the reg ulator if necessary Prior to performing any cleaning routine re move the pressure reducing valve from the pipeline Proceed 1 Tension the spring s by turning the set point adjuster 1 clockwise 0 to lift the plug out of the seat 2 Rinse the valve from both sides with water to remove any dirt from the seat and plug 3 Release the spring tension by turning the set point adjuster counterclockwise O and reinstall the valve in the pipeline 2555 5 Dimensions 5 Dimensions All dimensions in mm Fig 4 Dimensional drawing Type 50 EM and Type 50 ES Connection G 3 8 Weight approx 0 7 kg 6 2555 EN 6 Customer inquiries Should any malfunctions or any defect occur SAMSON s After Sales Service is prepared to help you on site You can also send the defective regulator di rectly to your local SAMSON representative for repair Addresses of SAMSON subsidiar ies agencies and service centers are listed in the product catalogs and
4. e reducing valves consist of a valve with seat and soft seated plug and a valve bonnet with an operating diaphragm positioning spring s and a set point adjuster Type 50 EM has a pressure gauge connection instead of a stopper Type 50 ES The con nected pressure gauge indicate the down stream pressure The pressure reducing valve is designed to maintain the pressure downstream of the valve to an adjusted set point The valve is open when it is depressurized The valve closes when the pressure down stream of the valve rises above the adjusted set point The process medium flows through the valve between the seat 7 and the plug 8 in the di rection indicated by the arrow The position of the valve plug determines the flow rate and hence the pressure ratio across the valve The downstream pressure is transmitted to the operating diaphragm 4 and converted into a positioning force This force is used to move the valve plug over the plug connection link 6 depending on the force of the posi tioning spring s 3 The spring force can be adjusted at the set point adjuster 1 Design and principle of operation Set point adjuster Springls Operating diaphragm Body Plug connection link Seat Soft seated plug SONO OR WwW gt Stopper or connection for pressure gauge Upstream pressure Downstream pressure Fig 2 Sectional drawing of 50 ES 2555 3 In
5. stallation 2 Installation 2 1 The pressure reducing valve can be installed in any desired position Mounting position The medium must flow through the valve in the direction indicated by the arrow on the valve body NOTICE Protect the regulator against frost when the process medium e g water can freeze Remove the valve from the pipeline while the plant is shut down Note Thoroughly flush the pipeline prior to installation of the valve Otherwise sealing particles globules and other impurities carried along by the process medium could impair the proper functioning of the valve especially the tight shut off Shut off valve Pressure gauge for upstream pressure Strainer Type 50 ES Pressure Reducing Valve Pressure gauge for downstream pressure Typical installation EB2555 EN 2 2 Strainer Install a strainer SAMSON Type 1 NI with a mesh size of 0 25 mm upstream of the pres sure reducing valve Make sure the process medium flow corre sponds with the direction indicated by the arrow on the strainer In horizontal pipelines install the strainer with the filter element suspended downwards In upright pipelines where the medium flows upwards install the strainer with the drain flange of the filter element facing upwards In this case the dirt particles are only retained but not collected Ensure that enough clearance is provided to remove the filter 2 3 Sh
6. ut off valve and pressure gauge We recommend installing hand operated shut off valves both upstream of the strainer and downstream of the pressure reducing valve This allows the plant to be shut down for cleaning and maintenance routines or when the plant is not operated for extended periods Install pressure gauges both upstream and downstream of the pressure reducing valve in order to monitor the pressures prevailing in the plant Type 50 EM has a mounted pressure gauge to indicate the downstream pressure 3 Operation During start up fill the plant slowly with the process medium NOTICE The pressure at the regulator must not exceed the maximum permissible operating pressure for the regulator 3 1 Adjust the downstream pressure required by turning the set point adjuster 1 Set point adjustment Turn the set point adjuster clockwise U to increase the downstream pressure Turn the set point adjuster counterclock wise lt to reduce the downstream pres sure The pressure gauge mounted the Type 50 EM Pressure Reducing Valve allows the adjusted set point to be monitored directly at the pressure gauge Operation 4 Maintenance NOTICE Remove the valve from the pipeline prior to performing any work Make sure the relevant section of the plant has been depressurized and depending on the medium drained as well The pressure reducing valve is mainte nance free but is subject to wear and te
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