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MN03005

1. 1 00 FMC Technologies Measurement Solutions Inc All rights reserved MN03005 Issue Rev 0 3 1 03
2. Control 4 Normally Closed Solenoid E Flow Opening Speed Control The opening speed control should be fine tuned at this point to achieve a smooth transition If a change in adjust ment is made push the emergency button and repeat Zone Nos 2 through 4 for a final opening speed observa tion Normally Open Solenoid Closing Speed Control 40 Rate of Flow Control Normally Closed Solenoid Flow Opening Speed Control Zone 4 Transition from Low Flow Condition to High Flow Condition Zone No 5 High Flow Condition When the flow rate approaches the specified limit the rate of flow control should sense the differential pres sure proportional to the flow developed across the ori fice plate located in the valve flange This differential pressure causes the rate of flow control pilot to start clos ing causing a pressure to build up in the cover of the valve forcing the main valve to modulate or control flow rate A hydraulic balance is then reached preventing excessive flow rates The closing speed control must be adjusted first because this adjustment affects the setting of the rate of flow con trol Issue Rev 0 3 1 03 MNO03005 e Page 7 Section 4 Operation continued The closing speed control must be adjusted during an emergency shutdown This control must be adjusted to limit the number of gallons throughput after the high level detector signals an emerg
3. Solenoid Normally Closed Solenoid Set Stop Counter Zone No 1 Valve Closed Start Up Procedure With the set stop counter in the off position and the set stop counter switches A and B open the solenoids are de energized pressurizing the valve cover and holding the valve fully closed The closing speed control should initially be opened one 1 turn thus assuring that the valve will close quickly under emergency conditions Fine tuning of this control must be done later as described in Zone No 5 The opening speed control should initially be opened to 1 2 turn thus assuring slow opening of the valve help ing to eliminate any severe surprises Fine tuning of this control will be done later as described in Zone No 4 The rate of flow control has been adjusted at the factory for the flow rate specified on the log sheet based on customer specification or maximum rating of meter if known Therefore adjustment at this time is not normally required Fine tuning of this control will be described in Zone No 5 The low flow start timer coil wire should be disconnected so that all the Zone No 3 adjustments can be made without the interference from the timer Issue Rev 0 3 1 03 MN03005 e Page 5 Section 4 Operation continued Without Low Flow Start 1st Stage Trip S S C Switch A Normally Closed Solenoid Stem Switch Final Stage Trip S S C Switch B Swich
4. ASME Changed working pressure to 150 psi only Modified note to specify differential pressure Changed temperature ranges added elastomer LS Buna and footnote 1 and 2 The specifications contained herein are subject to change without notice and any user of said specifications should verify from the manufacturer that the specifications are currently in effect Otherwise the manufacturer assumes no responsibility for the use of specifications which may have been changed and are no longer in effect Headquarters 1803 Gears Road Houston TX 77067 USA Phone 281 260 2190 Fax 281 260 2191 Gas Measurement Products Liquid Measurement Products Erie PA USA Phone 814 898 5000 Erie PA USA Phone 814 898 5000 Beijing China Phone 86 10 6500 2251 Thetford England Phone 44 1842 82 2900 Los Angeles CA USA Phone 661 702 8660 Singapore Phone 65 6861 3011 Kongsberg Norway Phone 47 32 286 700 Slough England Phone 44 1753 57 1515 Chennai India Phone 91 44 450 4400 Buenos Aires Argentina Phone 54 11 4312 4736 Ellerbek Germany Phone 49 4101 3040 Integrated Measurement Systems Barcelona Spain Phone 34 93 201 0989 Corpus Christi TX USA Phone 361 289 3400 Moscow Russia Phone 7 495 964 8705 Kongsberg Norway Phone 47 32 286 700 Melbourne Australia Phone 61 3 9807 2818 San Juan Puerto Rico Phone 787 274 3760 United Arab Emirates Dubai Phone 971 4 331 3646 Visit our website at www fmctechnologies com Printed in U S A
5. does not enter 2nd stage of final shutdown Set stop counter not function ing properly Refer to Set Stop Counter Bulletin N C solenoid does not open Check timer Solenoid should open Replacement of solenoid may be necessary 2nd trip set stop switch B out of adjustment or defective Refer to Set Stop Counter Bulletin Valve does not shut off at zero Low flow rate too fast or too slow Stem switch out of adjustment Refer to Zone No 3 for adjustment Set stop counter trip cam out of adjustment Refer to Set Stop Counter Bulletin Page 10 e MN03005 Issue Rev 0 3 1 03 Section 6 Related Publications The following literature can be obtained from FMC Technologies Measurement Solutions Inc Literature Fulfillment at johno gohrs com or online at www fmctechnologies com measurementsolutions When requesting literature from Litera ture Fulfillment please reference the appropriate bulletin number and title Parts List Form No Oe Seege E lei vl Eed dE been re eege E E E A tienes TE P1051 WEE P1052 EE P1053 OP fencers wast eege GEERT EELER EENS EE SEENEN EENEG acest P1054 The latest edition is indicated by a 2 digit postscript e g 01 02 etc Issue Rev 0 3 1 03 MNO3005 e Page 11 Revisions included in MN03005 Issue Rev 0 3 1 03 Page 2 Added corrosion erosion note Page 4 Removed cast iron option on 3 and 4 sizes Changed end details from ANSI to
6. now temporarily disconnected shutting off the upstream supply of pres sure to the valve cover and draining the valve cover down stream through the opening speed control the rate of flow control and the normally closed solenoid pilot valves The opening speed control adjustment could be made at this time if it is required however it is recommended that the fine tuning be done in Zone No 4 after observing an entire valve sequence of operation Normally Open Solenoid Closing Speed Control Rate of Flow Control Orifice Sf Normally Closed amp X Solenoid Flow Opening Speed Control Strainer Zone 2 Transition from Closed to Low Flow Condition Model 296 40 Zone No 3 Low Flow Condition When the main valve opens far enough the stem switch is actuated de energizing the normally closed solenoid and causing the valve to become hydraulically locked The valve cannot open or close at this point The stem switch cam should be adjusted to allow the desired flow rate for the low flow condition This is achieved by loosening the nuts on the threaded stem located on the top of the valve cover and moving the cam up or down Moving the cam up will cause a lower flow rate Moving the cam down will cause a higher flow rate Before the low flow start timer coil is reconnected push the emergency button on the set stop counter which should cause the valve to close This will prove the valve can be close
7. Limit the overrun to a safe quantity guarding against spills if the emergency shutdown has to be actu ated The graph shown below is a typical loading operation curve representing the sequence of operation for the 296 Set Stop Valve Each major control component on the 296 valve is listed down the left side of the chart The loading operation curve is divided into 8 zones from left to right This will allow a breakdown of the principle of opera tion into 8 separate zones Note that the text and ex amples are based on including the Low Flow Start Timer The heavy dark lines indicate energized circuits in the electrical schematics and high pressure circuits in the hydraulic schematics Dotted lines indicate inter medi ate pressure in the hydraulic schematics Installation Note Entrapped air in the valve cover and or control loop can cause the valve to function erratically and cause severe shocks Therefore the air must be vented from the valve cover and or the highest point in the control loop Open the gate valve only slightly so that the entire meter run including the motor and valve can slowly fill up with product while the air is vented o Open Without Low wn j i Flow Start SES ci i Kg i Hi With Low Flow Start Energized De Energized Valve Stem Switch Timer Coil T Timer Contacts T A and T and A Timer Contacts T B and T and B Normally Open
8. Smith Meter Valves Set Sto P MGC Technologies Model 296 Installation Operation Issue Rev 0 3 1 03 Bulletin MN03005 Contents Section T e EE Page 2 Section 2 DIMENSIONS xs jececsvecceaagees cvecrsaceenesnansecerdues stecseeldeeeeeaeesueetssenetiauseithn detect ane Page 3 Section 3 Specifications cece eeenee ee ee cee eeeene eee eeee setae eeteaee ee eceaeeetneaeeeeeaeeeenaeeeeecaeeeseeaeeees Page 4 Section 4 Operation Page 5 Section 5 Troubleshooting Guide eeeeeeeeeeeee eeki reeiittsttntttknttttttttknntetnntatknnntnnnnnnn natnn nnnnn nennen Page 10 Section 6 Related Publications 0 cccccccccee cence ee eeeeeeeeee ee eeeeeeeeeaaeeeeeeaeeeeeeeeeeeaaeeeseeeeeseneeeeneeeetee Page 11 The Most Trusted Name In Measurement Section 1 General This manual has been prepared to acquaint the installer and serviceman with the operation adjustment and main tenance of the basic Smith Meter Model 296 Set Stop Two Stage Closure Valves designed for adaptation of low flow start with a time delay relay These set stop valves are designed to function with low viscosity products and to operate in conjunction with Smith meters equipped with set stop counters The counter provides a means by solenoid control of reducing flow gradually through the valve then shut ting off accurately after a predetermined quantity of liquid has passed through the meter There is no me
9. Top S S C Switch A Normally Open Solenoid Solenoid Final Stage Trip S S C Switch B Low Flow Timer On Delay With Low Flow Start Zone 1 Valve Closed Model 296 40 Zone No 2 Transition from Valve Closed to Low Flow Condition CAUTION Until the valve is completely under control and func tioning correctly the system should be operated with only a partially opened butterfly or gate valve up stream of the meter run This upstream valve should be opened only enough to allow the necessary flow rate for the adjustments being made Only when the valve has been cycled through the entire sequence should the upstream butterfly or gate valve be fully opened Without Low Flow Start First Stage Trip S S C Switch A Normally Closed Solenoid Stem Switch Q L ec Normally Open g fe Final Stage Trip Solenoid S S C Switch B First Stage Trip S S C Switch A Normally Closed Solenoid Stem Switch T2B Normally Open i gt Solenoid a Q LA Li Taal I zc T Low Flow7 lt With Low Flow Start Final Stage Trip SSC Switch B Timer On Delay 1st Stage Trip Normally Closed Closing Speed Normally Open Control Solenoid 40 Rate of Flow Control ormally Closed Solenoid Opening Speed Control Pull out the set stop counter knob which closes the set stop counter switches A and B This energizes both sole noids and the low flow start timer coil
10. applications Page 4 e MN03005 Issue Rev 0 3 1 03 Section 4 Operation The Model 296 basic Set Stop Valve is complete with all accessories and controls necessary to provide automatic two stage shutdown for a typical loading operation when used in conjunction with a two stage set stop counter or similar device The valve is designed to operate in conjunction with a Model 15A Low Flow Start Timer a Model 40 Rate of Flow Control a Model 50A Pressure Reducing Control a Model 60A Back Pressure Control and others consult factory It is recommended that at least one 1 modulat ing pilot such as a rate of flow control be used to keep the valve in a modulating condition at all times This assures the necessary emergency shutdown response time thereby minimizing accidental overruns This manual s principles of operation are based on the 296 40 The Model 296 basic Set Stop Valve is designed to ac complish the following basic functions 1 Adequately control the flow to affect an accurate zero shutoff without excessive line shock by utiliz ing a two stage shutdown 2 Limit the flow rate to the meter s maximum rating by adding the rate of flow pilot 40A thus avoiding meter damage S S C Switch A First Stage Trip SSC Switch B Final Stage Trip 3 Limit the downstream pressure by adding the pres sure reducing pilot 50A thus protecting the truck manifold bottom loading 4
11. chanical linkage between counter and valve Remote electrical operation such as interlocks and overfill detection is also made possible with positive con trol and safety In addition to the basic controls which are incorpo rated with these valves certain additional control functions and accessories may be added as required for the application The Model 296 Valve is recommended for those installa tions requiring exact 0 25 gallon shut off delivery of a determined quantity with a minimum of line shock and low flow start These valves except for the shape of the valve body are identical in general design application and performance For this reason except where noted the valves are treated as one in this manual All illustrations are of the 4 Model 296 Valve unless otherwise indicated Additional infor mation will accompany this manual when accessories have been added to the basic valve These products have been designed for petroleum appli cations where corrosion erosion is normally minimum The design of the pressure containing housings have adequate material allowance for typical petroleum appli cations Consult the factory for other applications or for the actual material allowances Page 2 e MNO3005 Issue Rev 0 3 1 03 Section 2 Dimensions Side View Top View eege pape T O inlet Junction Conduit Inlet Box Junction Box Model 296 Valve Globe Pattern Note All dimens
12. d and opened If the system is a high Page 6 e MN03005 Issue Rev 0 3 1 03 Section 4 Operation continued pressure system it may be necessary to readjust the closing speed control in order to reduce the line shock Final Stage Trip S S C Switch B First Stage Trip Stem S S C Switch A Normally Closed Switch Top Solenoid With Low Flow Start On Delay Zone 3 Low Flow Condition Model 296 40 Zone No 4 Transition from Low Flow Condition to High Flow Condition When the low flow timer times out the actuated timer contacts energize the normally closed solenoid and de energizes the normally open solenoid This allows the valve to open to the high flow condition at which point the rate of flow control should start modulating the valve near the specified flow rate setting K ng og Normally Closed First Stage Trip Solenoid S S C Switch A SA ka S Stem o Switch Final Stage Trip Normally S S C Switch B Open Solenoid First Stage Trip Normally Final Stage Trip S S C Switch A Eer S S C Switch B Stem Switch T2B at Solenoid Ze O Low Flow With Low Timer Flow Start On Delay If the closing speed control is readjusted repeat Zone Nos 2 and 3 If everything seems to be operating cor rectly reconnect the low flow start timer coil and adjust the desired low flow time duration Normally Open Solenoid Closing Speed Control 40 Rate of Flow
13. e to ensure minimum maintenance and maximum service life Note Before starting up a new installation or any system which has been contaminated with foreign materials from repairs damaged equipment etc it is strongly recom mended that the following be done 1 Clean the foreign materials from the line especially between the strainer and valve 2 Install a temporary fine mesh screen 40 mesh or finer in the strainer in order to remove the remain ing foreign materials from the system Pressure Loss Graphs It should be noted that these pressure losses are for full open valves and cannot be used when considering modu lating valves since they rarely go full open during normal operation These pressure losses can however be used as guidelines for proper valve sizing L MII SE CT BER 7 ALi t TTT THN Ht Att Hat AT Cv Flow Coefficient 4 HALAL IA Pressure Loss PSI Pressure Loss Kq CM2 KE ER CH HE PA E EHN HEEN Pressure Loss PSI Pressure Loss Kg CM2 1200 and 1200PC Series Pressure Loss Flow Data Valve in wide open position Valve cover vented to atmosphere Specific gravity 1 0 water at 60 F 1 Temperature Limits are based on the following a minimum temperature rating of the housing b min max effective temperature of one of the seals c min max temperature limit of typical
14. eed Solenoid Control 40 Rate of Flow Control Orifice Plate R Strainer Normally Closed Solenoid i Flow Opening Speed Control Zone 8 Transition from Low Flow to Valve Closed Model 296 40 Issue Rev 0 3 1 03 MN03005 e Page 9 Section 5 Troubleshooting Guide Problem Cause Remedy Valve does not open No pressure registers at inlet side of valve Upstream shutoff valve is closed Open shutoff valve Obstruction in upstream shut off valve Remove obstruction Pump not operating Start pump Valve does not open Pressure registers at inlet side of valve Downstream shutoff valve is closed Open shutoff valve Differential pressure across valve is too low below 5 psi Check pressure source for sufficient pressure Needle valves not adjusted properly Opening speed control valve should be open Adjust sensitivity needle valve could be open too far Obstruction in pilot or main diaphragm is ruptured 1 Close the closing speed needle valves 2 Slowly crack a fifting between closing speed control and valve cover in cover loop 3 If valve opens diaphragm is not ruptured 4 If continuous flow through fiftings develop then diaphragm is ruptured 5 Close upstream gate valve and remove main valve cover and replace diaphragm No electric power Set stop counter switches not functioning Check wiring and pow
15. ency shutdown in order to pre vent a spill and at the same time prevent excessive line shock A typical maximum permissible throughput after an emergency shutdown signal is 18 to 20 gallons The rate of flow control should be adjusted after the Without Low Flow Start Normally Closed First Stage Trip Solenoid S S C Switch A Cie Stem o Switch Final Stage Trip S S C Switch B Final Stage Trip S S C Switch B Stem o Switch T2 Normally Open Solenoid First Stage Trip Normally S S C Switch A Closed Ry Solenoid Normally Open Solenoid closing speed control has been set It should be fine tuned to allow the desired specified high flow rate By turning the adjustment screw clockwise the flow rate will increase By turning the adjusting screw counter clock wise the flow rate will decrease If adjusting screw reaches its stop in either direction before desired flow rate is ob tained resizing of the orifice plate may be necessary or desired flow rate is beyond system capability Normally Closing Speed Open Control Solenoid d 40 Rate of Flow Control Orifice Zone 5 High Flow Condition Modulating Condition Should Exist Model 296 40 Zone No 6 Transition from High Flow Condition to Low Flow Condition When the set stop counter counts down and actuates the first stage trip point the set stop counter switch A opens de energizing the normally closed solenoid and pressur izing the cover
16. er source Check set stop counter switches for electrical opera tion and adjustment Main valve bypasses low flow start or low flow shutdown Stem switch not operating properly Check for proper functioning of switch Refer to Zone No 3 Stem Switch Adjustment Low flow start timer adjusted to zero timer Adjust timer delay time Main valve functions erratically and causes severe shocks Entrapped air in the valve control loop Refer to Zone No 1 installation note Main valve opens too fast or too slow Opening speed needle valve out of adjustment Turn adjusting stern on needle valve in clockwise direction to decrease opening speed Valve does not go into 1st stage slow down prior to shutdown Set stop counter handle does not function properly Refer to Set Stop Counter Bulletin 1st trip set stop switch A out of adjustment or defective Refer to Set Stop Counter Bulletin for adjustment 1st trip N C solenoid defective Check for electrical operation Replace coil if necessary Product flow de creases too fast during emergency stop Closing speed control is open too wide Turn adjusting stem clockwise to decrease rate of response Desired high flow rate is unobtainable by adjusting 40A rate of flow pilot Desired flow rate is then beyond system capability or resizing of orifice may be necessary Consult factory or representative Valve
17. ions shown are in inches Model 296 Valve D E 14 25 10 16 38 10 75 19 50 12 50 Class 150 ASME Flanges Issue Rev 0 3 1 03 MNO03005 e Page 3 Section 3 Specifications Sizes 3 4 and 6 296 Series Globe Pattern cast steel End Details Class 150 ASME B16 5 flanges cast steel Working Pressures Maximum Working Pressure 150 psi Note The maximum working pressure is limited by the maxi mum operating pressure differential rating of the solenoid not the system Viscosity Maximum Viscosity at Flowing Temperature 1 000 SSU 220 centistokes Elastomer Valve Temperature Limits LS Low Swell Buna 20 F to 200 F 29 C to 93 C Buna N Elastomers 20 F to 200 F 29 C to 93 C Viton Elastomers 20 F to 350 F 29 C to 177 C Materials Main Body and Cover Cast Steel Internals Ductile iron bronze and stainless steel Pilots and Control Loop Steel controls steel tubing Electrical Ratings 120 240 480 Vac 60 Hz or 110 200 440 Vac 50 Hz Optional Equipment Available Junction Box Low Flow Start Timer Rate of Flow Con trol Pressure Reducing Control Back Pressure Control others consult factory or nearest sales office Strainer Diaphragm Type Valve 2 to 6 inch 1 Valves with a Low Swell Buna Viton or Buna N dia phragms and seals It is recommended that a 4 mesh or finer strainer be installed upstream of the valv
18. low Condition Model 296 40 Zone No 8 Transition from Low Flow Condition to Valve Closed When the set stop counter actuates the final stage trip point the set stop counter switch B opens This de ener gizes the normally open solenoid and timer coil fully closes the main valve and resets the timer contacts for the next loading operation Without Low Flow Start First Stage Trip S S C Switch A Normally Closed Solenoid Stem Switch Final Stage Trip S S C Switch B Normally Open Solenoid Final Stage Trip Normally S S C Switch D Stem First Stage Trip Closed Switch T2B S S C Switch A Solenoid Normally Open a Solenoid S A With Low Timer Flow Start j On Delay A few trials may be necessary if the precise low flow rate is required The low flow rate should be approximately the same flow rate as was set for the low flow start feature in Zone No 3 and cannot be changed without also chang ing the low flow start flow rate Refer to Zone No 3 for stem switch adjustment Normally Open Solenoid g Closing Speed Control 40 Rate of Flow Control Orifice Plate Normally Closed Solenoid pe Flow Opening Speed Strainer Control To obtain an accurate zero shutoff the set stop counter cam for the final stage trip point may have to be adjusted For this adjustment refer to the Installation Operation Service Manual for the set stop counter Bulletin MN01012 CH Closing Sp
19. of the valve which initiates the Without Low Flow Start First Stage Trip S S C Switch A Normally Closed Solenoid Stem o Switch Final Stage Trip Normally S S C Switch B Open Solenoid Normally First Stage Trip Closed Final Stage Trip S C Switch B SSC Swin B Ze SSC SwitchA Solenoid Fiow Start On Delay main valve to close The speed at which the valve reaches 2nd stage flow is governed by the adjustment made pre viously for emergency shutdown and should not be changed for this function of the operation sequence Normally Closing Speed Open Solenoid d Control 40 Rate of Flow Control Orifice Plate Normally Closed Solenoid _ Flow Opening Speed Control Strainer Zone 6 Transition from High to Low Flow Condition Model 296 40 Page 8 e MN03005 Issue Rev 0 3 1 03 Section 4 Operation continued Zone No 7 Low Flow Condition When the valve reaches the low flow position the stem switch is again actuated closing the switch contact This energizes the normally open solenoid and locks the main valve hydraulically Without Low Flow Start First Stage Trip S S C Switch A Normally Closed Solenoid Stem o Switch Final Stage Trip Normally S S C Switch B Open Solenoid Final Stage Trip Normally S S C Switch D Stem First Stage Trip Closed o Switch T2B SSC Switch A Solenoid With Low Flow Start On Delay Zone 7 Low F

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