USER`S MANUAL
Contents
1. The pressure of OUT1 reaches exhausting pressure level and does not come back down D Check A M switch If the switch has been damaged replace the switch or pilot relay valve 2 Check for a gap or damages between the nozzle and the flapper The pressure is exhausted only by A M switch D Check if the positioner s nozzle has been blocked Also check if the pressure is supplied to the positioner and the pressure is being exhausted trough the nozzle Hunting occurs D Check if safety spring has been displaced Next to pilot relay valve 2 Check if the size of actuator is too small If so insert an orifice in order to reduce the pressure flow rate 3 Check if there is any friction between the valve and the actuator If so increase actuator s size or reduce the friction level Actuator only operates by on off D Check pipe connection 2 Check cam direction Linearity is too low D Check if the feedback lever is properly installed Especially check if the feedback lever is parallel to the around at 5096 point 2 Check if zero and span has been properly adjusted that is not too low or not too high 3 Check if supply air pressure level is stable from the regulator If the level is unstable replace the regulator Hysteresis is too low D In case of double acting actuator check if seat adjustment has been properly done 2 Backlash can occur when feedback lever and lever spring is loosen To avoid2. Direction of actuator s stem rotation must be checked when supply signal is supplied When actuator s stem rotates clockwise the face of cam must be shown DA On the other hand when the stem rotates counter clockwise adjust cam so RA shows on the face of cam 2 Check whether actuator s angle is at the initial point 3 After checking the initial point release the hexagonal flange nut and adjust the position of the bearing so it is at O point Figure 18 4 When produced the cam is set as RA Caunter clocksise Llockwise am reference ine earing Reverse acting Direct acting Figure 18 gt Adjustment Zero Point D Set supply signal at 3 psi and rotate adjuster clockwise or counter clockwise to adjust actuator s rotation angle Figure 19 2 When adjusting zero for single actuator rotation angle is equal to positioner s pressure gauge di 1 lt Figure 19 gt Adjustment Span LINEAR Lock Screw Lock Screw Figure 20 gt D After setting zero rotate Span screw so supply signal reaches at the span point on the indicator 2 Changing span point affects zero point setting So zero setting must be set again After setting zero point confirm the span point This step must be repeated until both points are properly set 3 If 1 2 split range is used positioner can be used after span and zero point are set For positioner with 1 2 split range the span spring must
3. head bolt M8 x 1 25P 4 pcs of M8 plate washer Install Example Fork Lewer NAMUR Lever Bracket Information Positioner can be is supplied with standard bracket The bracket can be used for fork lever and NAMUR bracket Please see fig 8 for more detailed information Upper Bracket B Upper Bracket N 7t uu D NAMUR TYPE 6 3 4 20 JI d LI FORK 20 50 NAMUR 30 LL FORK 30 X IP MAMLE TYPE En 1 1 FORK TYPE 50 Mee pa lt Figure 82 1 Standard actuator stem height H is 20 30 or 50 mm After check H assemble with the bracket as shown in fig 8 amp 9 Actuator Stem Hi c Actuator Figure 9 gt 2 Attached bracketed positioner to the actuator by using hexagonal headed and wrench bolts Size of the bracket hole is 6mm When tightening bolts use spring washer or similar for complete attachment to the actuator so positioner will not be shaken by vibration or any other impact The direction of bracket is different by the operating condition but in general the positioned is installed as shown Figure 10 lt fig 10 gt Set rotation position of the actuator stem at zero point 096 Fora single type of actuator it is easy to check zero point because the actuator stem is positioned at zero point when there is no supply pressure If doub
4. 8 Cam Linie ar 20 FOR Ambient Temp High 20 120 Low 40 7 C 3 LPMiSup l Akgf cm LILPM Sup 4 0kgf cnr amp OLPMiSupz 14kgf cm 200LPMiSup 4 Aluminum Diecasting Test under ambient temperature of 20 absolute pressure of 760mimHa and of 65 Phase contact us for te more detailed specification Parts and Assembl PILOT VALVE TORQUE FEEDER SHAFT LINEAR gt HAFT PILOT VALVE FEEDER 5 LEVER NES oen L SPAM LIMIT TORQUE MORTOR ZERO UNIT ROTARY gt Dimensions LINEAR Dimension gt ROTARY Dimension Installation Safety Warning When installing a positioned please ensure to read and follow safety instruction gt All input and supply pressure to valve actuator and other related devices must be turned off gt Use bypass valve or other equipment to avoid entire system shut down Make sure there is no remaining pressure in the actuator Tools for Installation D Hexagonal wrench 2 Screw Drivers and 3 Spanners for hexagonal head bolts Linear Positioner Installation Should be installed on linear motion valve such as globe valve or gate valve using spring return type diaphragm or piston actuator Before installation be sure to check for following installation components D Main body 2 Feedback lever and lever spring 3 Flange nut b
5. Pneumatic Positioner PST 1 Series USER S MANUAL Ver 1 01 Introduction Each product is fully inspected after the production to offer you the highest quality In order to fully utilize the product we strongly recommend users to read this manual carefully and understood Themanual should be given to the end user Themanual can be chaged or revised without any prior notice Any changes in products specification structure and or any components may not result immediate revised version of the manual Manufacturer Warranty e Forthe safety it is imperative to follow instructions in the manual It is not manufacturer s liability for any damages which caused by users negligence e Itis not manufacturers liability for any damages or accidents which resulted by any alteration or modification of the product and parts If alteration or modification is necessary please contact the manufacturer directly e Manufacturer warrants the product from the date of original retail purchase of the product for one 1 year except as otherwise stated e Manufacturer warranty will not cover the products that the product have been subjected to abuse accident alteration modification tampering negligence misuse faulty installation lack of reasonable care repair or service in any way that is not contemplated in the documentation for the product or if the model or serial number has been altered tampered with defaced or removed damag
6. backlash adjust the lever spring 3 Check if the connection bar to the feedback lever is tightly fastened
7. be changed 4 After setting is completed tighten Lock Screw Figure 20 gt Adjustment A M Switch Auto Manual 1 A M switch adjusts the valve operation to Lock Screw automatic or manual 2 PST 1 series is set as Automatic as default If user wants to set as M Manual the setting can be adjusted by turning the switch counter clockwise fig 21 3 Ifthe setting is at M the air pressure will be supplied to the actuator di rectly Always set the Auto Manual Switch setting back to after any change Faure 21 gt 4 fOUT2 single acting actuator or double acting x actuator is used A M switch will not operate Adjustment Seat Adjuster D Seat adjuster is set according to the customer s request before the positioned is delivered Please do not adjust the seat adjuster Seat adjuster is used for double acting actuator Please do not touch the seat adjuster because it can affect the positioner s performance Troubleshooting Positioner does not respond to the input signal D Check supply pressure level The level must be at least 1 4 kgf cm 2 Check if input signal is properly supplied to the positioned The signal should be 3 15 psi 3 Check if the positioner s nozzle has been blocked Also check if the pressure is supplied to the positioned and the pressure is being exhausted through the nozzle 4 Check if feedback lever has been installed properly
8. e 4 gt 7 If connection bar does not point at 50 point then adjust bracket or feedback link bar position Failure to position at 5096 would lower the linearity of the positioner fig 5 Figure 5 gt 8 Check valve stroke The stroke numbers indicated on the feedback lever Position connection bar at the number on the feedback lever according to the valve stroke fig 6 To adjust move the bracket or the connection bar nup m PE MEER CON TE TN OT _ 9 n stroke 30mm w Stroke 7mm Figure gt NOTE After installing positioner operate the valve from 096 to 10096 stroke by using air filter regulator Both of 096 and 10096 the feedback lever should not touch the lever stopper which is located on the backside of positioner fig 7 If the feedback lever touches the stopper positioner should be installed further away from the center of the yoke Figure 7 gt 9 After the proper installation tighten all of the bolts on the bracket the feedback lever and the connection bar Rotary Positioner Installation Should be used for rotary motion valve that is ball valve butterfly valve using rack and pinion scotch yoke or complex type actuator which its stem rotates 90 degrees Before installation be sure to check for following installation components 9 Main body Fork lever and lever spring 1 set of bracket 3 pcs 4 pcs of hexagon
9. es that occurs in shipment due to act of God failure due to power surge and cosmetic damage Improper or incorrectly performed maintenance or report voids this Limited Warranty Product Description Main Features and Functions gt The product can operate normally in very extreme environment such as vibration and temperature The durability has been proven after testing 2 million cycles at the minimum Response time is very short and accurate Simple part change can set 1 2 Split Range It is economical due to less air consumption Direct Reverse action can be set easily Zero amp Span adjustment processes are simple Feedback connection is easy Operation Logic Lom oum ita 1 HF al NNI L 5 Rn el al FREESLRE PRESSURE I zi E i E LINEAR gt lt ROTARY gt Bellows push flapper if input pressure increases Then the between nozzle 3 flapper increases which results pressure in upper spool 5 exhaustion This would cause 5 5 to rise upward As the spool 5 rises it pushes format 8 and the air pressure will be supplied to the actuator d9 As the actuator s inner pressure increases the actuator stem will move For graphical diagram please refer to Figure 1 Specification Double 0 2 l0kgf cm 3 15psi 14 7 Okgf em 20 100psi Gauge Connection PT NPT 1
10. le acting actuator is used check actuator stem s rotation direction clockwise or counter clockwise by supplying pressure Install the fork lever as shown in fig11 after setting actuator stem at zero point Check the direction of the actuator stem clockwise or counter clockwise Installation angle of the fork lever should be 45 degrees based on the linear shaft For NAMUR shaft the angle does not matter A Counter cdockwrse Clockwise Figure 11 After setting fork lever position lock nuts which are assembled on bottom of the fork lever Attach positioner to the bracket Fix the damping pin on the main shaft of positioner and insert connection bar into the fork lever slot so it can be locked to the fork lever spring This sets the alignment of the main shaft of positioner and center of the actuator stem Bad alignment of the main shaft and the actuator stem lowers positioner s durability because too much force will be on the main shaft of positioner fig 12 Fork Lever LL zu e C Main Shaft Connection Bar lt Fic 12 Tighten positioner base and the bracket with hexagon headed bolts and plate washer It y is recommended to tighten four bolts after checking positioner s position fig 13 CHE Figure 13 gt Piping Connection Note To avoid entering moisture oil or dust into the product please carefully make selection of supply p
11. ottom side positioner 4 4 pcs of hexagon head bolts M8 x 1 25P 5 4 pcs of M8 plate washer Installation Steps 1 Proper bracket must be made in order to attach positioned on the actuator yoke Please consider following when making a bracket A Feedback lever should be leveled at 5096 of the valve stroke refer to step B Feedback lever connection bar of the actuator damp should be in stalled at the positioned that the valve stroke and numbers which indicated on the feedback lever must be fitted refer to step 2 Attached positioner to the bracket which was produced in previous step by using bolts Fig 1 Please refer to backside of the unit for size of the bolts The standard size of bolt is M8 x 1 25P and other bolts sizes are available 3 Attach positioner with bracket to the actuator yoke DO Figure 1 NOT TIGHTEN COMPLETELY 4 Connect positioner feedback lever to the actuator clamp The gap on the positioner feedback lever is 65mm The connection bar thickness should be less than 6 3mm Fig 2 5 Connect air filter regulator to the actuator temporarily Set supply pressure of the regulator in order to position the actuator damp at 5096 of valve stroke Fig 3 Figure 3 gt 6 Insert connection bar into the positioner feedback lever The connection bar should be inserted at the 5096 point on the feedback lever which would help to reduce hysteresis fig 4 Figur
12. ressure compressor It is recommended to attach air filter regulator before supply port of positioner Supply Pressure Condition QD 09 Dry air with at least 10 C lower than ambient temperature Avoid from dusty air Filter can only sort 5 micron or larger Avoid any oll Comply with ANSI ISA 573 1975 R1981 and ISA S73 1975 R1981 Not to be used beyond the range of 1 4 7 kgf cm 140 700 Set air filter regulator s supplied pressure 1096 higher than actuator s spring range pressure Pipe Condition QD 4 Make sure inside of pipeline is emptied Do not use pipeline that has been squeezed or has hole To maintain flow rate use the pipeline that has more than 6mm inner diameter 10mm outer diameter Do not use extremely long pipeline system It may affect flow rate due to the friction inside of the pipeline Piping connection with actuator Single Acting Actuator PST 1 series single acting type is set to use OUT1 port OUT1 port should be connected with supply pressure port from actuator when using single acting type of spring return actuator fig 14 amp 15 Figure 14 LINEAR gt Figure 15 ROTARY gt Double Acting Actuator For PST 1 series double acting type when inputting current signal supply pressure is our from OUT1 port Please refer to lt fig 16 amp 17 gt Figure 16 LINEAR gt lt Fiqure 17 ROTARY Adjustment Adjustment Cam D
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