Spirax Sarco EP500 Installation And Maintenance Instructions Manual
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Spirax Sarco EP500 Installation And Maintenance Instructions Manual

Standard electropneumatic positioner
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3.568.5275.305
IM-P343-44
CTLS Issue 5
EP500
Standard Electropneumatic Positioner
Installation and Maintenance Instructions
1. Safety information
2. Technical information
3. Installation
4. Commissioning
5. Maintenance
6. Spare parts
7. Fault finding
8. Approvals
EP500 Standard Electropneumatic Positioner
© Copyright 2021
Printed in Italy
IM-P343-44 CTLS Issue 5
1

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Summary of Contents for Spirax Sarco EP500

  • Page 1 Standard Electropneumatic Positioner Installation and Maintenance Instructions 1. Safety information 2. Technical information 3. Installation 4. Commissioning 5. Maintenance 6. Spare parts 7. Fault finding 8. Approvals EP500 Standard Electropneumatic Positioner © Copyright 2021 Printed in Italy IM-P343-44 CTLS Issue 5...
  • Page 2 EP500 Standard Electropneumatic Positioner IM-P343-44 CTLS Issue 5...

  • Page 3: Safety Information

    This product has been specifically designed for use on compressed air, which is in Group 2 of the above mentioned Pressure Equipment Directive. The products' use on other fluids may be possible but, if this is contemplated, Spirax Sarco should be contacted to confirm the suitability of the product for the application being considered.
  • Page 4 1.9 Tools and consumables Before starting work ensure that you have suitable tools and / or consumables available. Use only genuine Spirax Sarco replacement parts. 1.10 Protective clothing Consider whether you and / or others in the vicinity require any protective clothing to protect against the hazards of, for example, chemicals, high / low temperature, radiation, noise, falling objects, and dangers to eyes and face.

  • Page 5: Residual Hazards

    1.16 Returning products Customers and stockists are reminded that under EC Health, Safety and Environment Law, when returning products to Spirax Sarco they must provide information on any hazards and the precautions to be taken due to contamination residues or mechanical damage which may present a health, safety or environmental risk.

  • Page 6: General Product Information

    2. General product information 2.1 Introduction The EP500 is a 2 wire loop powered positioner requiring a 4-20 mA control signal, and is designed for use with linear pneumatic valve actuators. The positioner compares the electrical signal from a controller with the actual valve position and varies a pneumatic output signal to the actuator accordingly.
  • Page 7 2.3 Applications 2.4 Materials The EP500 can be used with any actuator that Part Material Finish conforms to NAMUR, this includes all of the following Spirax Sarco pneumatic actuators: Case Die cast Anti-corrosive aluminium paint to RAL9006 PN1000 and PN2000 series...

  • Page 8: Installation

    For best performance, set the air supply pressure to about 0.5 bar g above the pressure required to fully travel the actuator. Check all connections for leaks. Please note however that the EP500 bleeds air in normal operation at a rate of approximately 0.1 Nm³/hour at 1.4 bar supply pressure.
  • Page 9 Black Black Reverse Direct action - the air pressure increases when current signal increases and vice versa. Reverse action - the air pressure decreases when the current signal increases and vice versa EP500 Standard Electropneumatic Positioner IM-P343-44 CTLS Issue 5...
  • Page 10 3.3 Mounting the positioner onto the actuator The EP500 can be attached onto any type of valve and actuator conforming to NAMUR standards. The unit can be attached in the traditional centered position (Figures 2 and 3) in line with the actuator central axis or side mounted (Figures 4 and 5) to enable the operator to view frontally the stem of the valve.
  • Page 11 Use Figure 7 and Table 1 to determine the correct hole to use. Feedback lever fulcrum Fig. 7 EP500 Standard Electropneumatic Positioner IM-P343-44 CTLS Issue 5...
  • Page 12 Attach the bracket to the actuator with the screw M8 x 20 with washers (Figure 8). Take care to insert the feedback pin in the slot of the feedback lever while you attach the positioner (Figure 9). Fig. 8 Fig. 9 EP500 Standard Electropneumatic Positioner IM-P343-44 CTLS Issue 5...
  • Page 13 Minimum : 12 N m Maximum : 15 N m Connect the air supply Fig. 11 Unscrew the cap Insert the electric cable (4 to 20 mA), connect to the appropriate terminals and screw the cap. EP500 Standard Electropneumatic Positioner IM-P343-44 CTLS Issue 5...
  • Page 14 (using a 4 mm Allen key) Fig. 13 After manually screwing the cap M50, unscrew the screw M5 x 10 (using a 4 mm Allen key, creating a slight pressure between the screw head and stopper M50 EP500 Standard Electropneumatic Positioner IM-P343-44 CTLS Issue 5...
  • Page 15 Move the positioner and bracket upwards or downwards, so that the feedback lever is horizontal, then tighten the M8 x 14 screw to the required position. Fig. 15 EP500 Standard Electropneumatic Positioner IM-P343-44 CTLS Issue 5...
  • Page 16 Fig. 16 Correct placement Fig. 17 Incorrect placement EP500 Standard Electropneumatic Positioner IM-P343-44 CTLS Issue 5...
  • Page 17 Tighten the allen screw (black), (black), with a 4 mm key the vertical position with a 4 mm key Fig. 18 4. Hook the spring to the respective pin on the SPAN EP500 Standard Electropneumatic Positioner IM-P343-44 CTLS Issue 5...
  • Page 18 To change the slider turn the red gear until the slider is positioned into the correct half of the span arm. * Please note that the arrow illustrates the stem movement direction when the input control signal increases. Direct action Reverse action (inverse polarity input signal) Fig. 19 EP500 Standard Electropneumatic Positioner IM-P343-44 CTLS Issue 5...

  • Page 19: Set Sensitivity

    Note: Adjustment of the Xp % screw causes a change of positioner 'zero' point, and it is therefore important to repeat the zeroing and travel setting procedures after any changes. Once the positioner has been mounted and connected up, proceed as follows: EP500 Standard Electropneumatic Positioner IM-P343-44 CTLS Issue 5...
  • Page 20 ZERO regulation Fig. 21 Feed the EP500 with a current input of 4 mA, turn the ZERO (green knob), till it reaches the value of the desired pressure and the valve opening reaches the starting position. Feed the EP500 with an input current of 20 mA, turn the SPAN (red knob), until it reaches the desired pressure and the valve is fully opened or reaches the desired opening percentage according to the application requirements.
  • Page 21 4.4 Recommended current range values During commissioning and calibration, SxS recommend to use the following start opening current and fully open current range values when EP500 is used in combination with PN9000E actuators (direct action mode). SxS Actuator Spring range...

  • Page 22: Regular Maintenance

    Ensure that the side hole is clear Fig. 22 Refit the lock to touch the adjuster top and secure it with the lock-nut. Set the sensitivity see Step 2, Section 4, Commissioning. Reset zero and span if required. EP500 Standard Electropneumatic Positioner IM-P343-44 CTLS Issue 5...

  • Page 23: Spare Parts

    Always order spares by using the description in the column headed 'Available spares' and a description of the product. Example: 1 off Gauge 0 - 2 bar for a Spirax Sarco EP500 standard electropneumatic positioner. 1, 2, 3 1, 2, 3 Fig.

  • Page 24: Product Return Procedure

    4. If the equipment is being returned under warranty, please indicate: Date of purchase ii. Original order number Please return all items to your local Spirax Sarco branch. Please ensure all items are suitably packed for transit (preferably in the original cartons). EP500 Standard Electropneumatic Positioner...

  • Page 25: Fault Finding

    Incorrect zero point b. Recalibrate c. Valve / actuator coupling incorrect d. Reset (refer to valve / actuator IMI's) d. Actuator too small e. Fit correct actuator Fault finding continued on next page EP500 Standard Electropneumatic Positioner IM-P343-44 CTLS Issue 5...
  • Page 26 Sensitivity orifice closed too far b. Adjust by opening sensitivity screw c. Excessive valve friction c. Verify and maintain as valve IMI d. Control valve over-sizing d. Verify operating conditions against valve capacity EP500 Standard Electropneumatic Positioner IM-P343-44 CTLS Issue 5...
  • Page 27 8. Approvals EP500 Standard Electropneumatic Positioner IM-P343-44 CTLS Issue 5...
  • Page 28 EP500 Standard Electropneumatic Positioner IM-P343-44 CTLS Issue 5...

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