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Summary of Contents for Spirax Sarco HL 17
- Page 1 PREVIOUS REFERENCE NO. IM-P073-10 1053050/2 IM-P278-01-EN-ISS1 CTLS HL17 High Limit Cut-out Installation and Maintenance Instructions 1. Safety information 2. Installation 3. Start-up 4. Maintenance 5. Spare parts © Copyright 2018 IM-P278-01-EN-ISS1 CTLS Printed in GB...
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Page 2: Safety Information
The products have been specifically designed for use on steam 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 3: Protective Clothing
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 4: 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 5: Installation
2. Installation 2.1 General information The purpose of the solenoid valve is to shut-off the main valve. It can be controlled by any device capable of interrupting the supply of current to the solenoid coil, such as a thermostat. The solenoid is arranged to open the valve when the coil is energised to that whatever switching device is used it must be arranged to break the current to close the main valve. - Page 6 3. Start-up In most new installations dirt collects in the steam line during construction. It is always advisable to blow this out on initial start-up. Remove the cap on the strainer before the steam trap, crack open the steam supply blowdown to clear dirt, shut-off and replace cap.
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Page 7: Routine Maintenance
4. Maintenance 4.1 Routine maintenance It is recommended that the valve is occasionally given a complete overhaul and ideally this should be carried out with the valve removed from the line. The parts that may require replacing or refurbishing are listed below: Main valve seat and valve head. - Page 8 4.2 To clean the strainer and replace the gasket Isolate the valve and zero the pressure. Unscrew the unions and release pipework. Unscrew the nuts. Remove the top housing complete with the solenoid valve. Remove the screen and clean (or replace if necessary). Ensure the main valve return spring is still in position.
- Page 9 4.3 To renew or clean the main diaphragms Isolate the valve and zero the pressure. Undo the long union nut and pull away. Undo the M12 nuts and bolts. 10. Drop away the lower diaphragm chamber, the two diaphragms, diaphragm plate and pushrod assembly.
- Page 10 4.4 To service or renew the main valve and seat Isolate the valve and zero the pressure. 16. Unscrew the unions and release pipework. 17. Unscrew the nuts. 18. Remove the top housing. 19. Remove the screen and clean. 20. Remove the main valve spring and the main valve head.
- Page 11 Table 2 Recommended tightening torques for main seat Size of valve Width across flats Tightening torque ½", ½" LC, DN15 & DN15LC 30 mm (1.18") (external) 110 - 120 N m (81 - 89 lbf ft) ¾" & DN20 36 mm (1.42") (external) 140 - 150 N m...
- Page 12 26. Refit the pushrod assembly. 27. Refit the main valve head, make sure the valve locates on seat. 28. Open the valve by pushing onto the diaphragm plate until it comes up against the stop of the body. 29. Check the valve lift (shown in Table 3) using a depth gauge. Table 3 Valve lift Size of DN15LC...
- Page 13 30. Thoroughly clean the lower diaphragm chamber making sure the contact faces are clean. 31. Replace diaphragm plate and pushrod assembly and loosely fit the lower diaphragm chamber on two bolts either side of the union connection to locate the spigot in the recess. 32.
- Page 14 35. Ensure the gasket faces are clean. 36. Refit the main valve head. 37. Replace the main valve return spring. 38. Fit a new gasket. 39. Replace the screen. 40. Assemble the top housing complete with the spring housing assembly and tighten the nuts to the recommended torques shown in Table 1, page 8.
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Page 15: Coil Replacement
4.5 To service or renew solenoid valve 42. Remove the retaining nut, washer and seal and slip the entire solenoid enclosure off the solenoid base and sub-assembly or plugnut/core tube sub-assembly. 43. Unscrew the bonnet or solenoid base sub-assembly and remove the core spring, core assembly and body gasket. -
Page 16: Spare Parts
Example: 1 - Main valve assembly for a Spirax Sarco DN25 HL17 High limit cut-out valve. Note: To provide a stand-by set of spares for general maintenance purposes, an order for 1 maintenance kit will cover all spares marked*. - Page 17 IM-P278-01-EN-ISS1 CTLS...
- Page 18 Interchangeability of spares The following table shows how in certain sizes some parts are interchangeable. For example in the line headed 'Main diaphragm' the diaphragm used in the screwed valves ½" and ¾" is common to these sizes by the letter 'a', the letter 'c' indicates that one diaphragm is common to the DN40 and DN50 valves. All spares marked †...
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