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Summary of Contents for CSA XLC 325
- Page 1 XLC 325/425 CSA waterworks line Upstream pressure sustaining/relief automatic control valve with solenoid control Mod. XLC 325/425 For further information please consult us at: www.comeval.es...
- Page 2 This manual will provide you with the information to properly install and maintain CSA automatic control valves XLC series. The contents and the procedure are intended for technicians in charge of CSA valves only, prior to a theoretical and practical training by CSA qualified personnel only. Safety All safety messages in the instruction manual are flagged with the following symbol meaning danger, caution and warning.
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Page 3: Table Of Contents
XLC 325/425 Contents Description - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4... -
Page 4: Description
XLC 325/425 Description The pilot operated control valve XLC series Mod. 325/425 is designed to automatically sustain and relief a upstream pressure value, regardless of variation in demand and upstream pressure fluctuations. Thanks to the solenoid control the valve will be able to close or open, in response to a signal sent from remote or by an external controller. -
Page 5: Handling And Storage
XLC 325/425 Handling and storage Lifting the valve improperly may damage it and the equipments around. It is mandatory not to fasten the valve around the circuit, fittings, pipes, solenoids or position indicators. Valves must be lifted only by cables, chains, located around the body, through the flanges holes or eyebolts. -
Page 6: Installation
Smaller valves, (up to 150 mm) can be installed in a vertical pipe shouldn’t be unavoidable. Prior to that consult CSA and specify the orientation in the order. A stable and non pulsating source of pressure is necessary for the proper performance of CSA control valves, whose minimum pressure is displayed on the technical brochure and always 0,5 bar on the pilot in addition to the headloss produced during working conditions. -
Page 7: Set Up
The set up and valve regulation has to be carried out by qualified personnel only, or directly from CSA service. Improper actions can lead to permanent damages to the valve, its internal components and system equipments along with possible injuries of the people involved. - Page 8 4 years, according to the following instructions. The solenoid valves ate not a CSA products, they are tested before supply, user is invited to read and understand the operating principle and make sure to clean it and maintain the operating parts according to their specific indications (this could change according to the brands chosen for the job).
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Page 9: Msm - Upstream Pressure Sustaining/Relief Pilot
XLC 325/425 MSM – Upstream pressure sustaining/relief pilot The upstream pressure sustaining/relief pilot is a diaphragm operated valve, spring loaded and direct acting, that can be installed basically in any position. The function is nothing but to sustain or relief the upstream pressure regardless of flow rate and pressure variations. - Page 10 If that is not enough we strongly recommend you to contact CSA technical support or order the maintenance kit. Reassembly To reassembly the pilot you have to repeat, obviously in reverse sequence, the same steps...
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Page 11: Gr.i.f.o. 3 - 3/8" Pn 25
(Integrated Group Filter Orifices) is a CSA unit flow control device that includes all the necessary functions, needed for the proper regulation and stability of the main valve. Its compact design makes the entire circuitry easy to be maintained, simple and intuitive yet allowing a tremendous range of regulations compared to other solutions on the market. - Page 12 Others Please contact CSA for informations. The regulators are needle valves designed by and exclusive property of CSA Srl and the rotation permits to obtain a specific passage. For example the regulation 3 means that, starting from the complete closed needle (turned clockwise), unscrewing 3 turns in opening you will get the indicated regulation.
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Page 13: Needle Valve 3/8" - Vs
O-Ring Spare parts kit VS needle valve is exclusive property of CSA srl and its mainly used whenever GRIFO is not necessary, like XLC 440, XLC 450, XLC 460, and more in general where we need to decrease the flow control of the main chamber to very limited values. -
Page 14: A2 Two Ways Flow Accelerator
XLC 425 A2 Two ways flow accelerator sealing seat onto which the obturator (7) is acting. Should the pressure applied on the inlet and on the chamber be the same the valve will close, thanks to the difference in force. Should the chamber be put in communication with the atmosphere the valve will be pushed to the open position thanks to the pressure exterted below the obturator. -
Page 15: Visual Position Indicator
Disassembly The CSA position indicator is a sturdy and solid item not subject to maintenance, in case of frost and unexpected and accidental impact it may break. For the disassembly simply hold the lower part (2) and unscrew the upper part (1). -
Page 16: Interventions On The Main Xlc Valve
XLC 425 Interventions on the main XLC valve Component Material Body GJS 450-10 or GJS 500-7 GJS 450-10 or GJS 500-7 Position indicator St. steel/Ni-plated brass Pressure outlet tap AISI 316 Upper flat o-ring NBR/EPDM/Viton Obturator o-ring NBR/EPDM/Viton Indicator stem AISI 303 Main shaft AISI 303/AISI 316... -
Page 17: Troubleshooting
XLC 425 Problems solving Problem Cause Solution The main valve doesn’t The gate valves are closed Open the gate valves close The ball valves of the circuit are Open the ball valves closed There is no pressure inside Check the pressure coming the main chamber into the circuit The diaphragm is damaged ( see... - Page 18 When the valve is closed, mark the glass of the indicator to the corresponding position and verify that the movement of the rod is like the one indicated below, if different, then means that there is something preventing the proper movement of the mobile group and please contact CSA immediately.
- Page 19 In these cases we must proceed with an accurate inspection to clean the component by means of sandpaper then polish it, if the problem can’t be solved on the spot please contact CSA technical support for immediate assistance.
- Page 20 Up to DN 150 the sealing seat is screwed into the body while for the remaining DN it is set tight by several screws. To carry out a further inspection and removal of the sealing seat, and in case of cavitation, please contact CSA technical support for immediate assistance. Inspection After all the components have been dismantled we need to look for any damage caused by wear of the surface, deposits, corrosion or something else.
- Page 21 XLC 425 Reassembly To reassemble do the reverse of the disassembly procedure positioning the main shaft back into the grip along with all the pieces. It is very important not to forget the O-Ring (21) and to set the nut tight (10) to assure a proper torque between the diaphragm and the plane gasket. Please be extremely careful with this step because a nut not properly tight may engender movements making the mobile block unstable, therefore affecting the valve’s performance.
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Page 22: Guarantee
You shall be solely responsible for determining suitability for use and in no event shall CSA srl. be liable in this respect. CSA srl does not guarantee resistance to corrosion, erosion, abrasion or other sources of failure, nor does CSA srl guarantee a minimum length of service.
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