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Summary of Contents for CSA XLC 312
- Page 1 XLC 312/412 CSA waterworks line Downstream pressure reducing and upstream pressure sustaining pilot operated automatic control valve Mod. XLC 312/412...
- 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
CSA sales terms and conditions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -... -
Page 4: Description
XLC 312/412 Description The pilot operated control valve XLC series Mod. 312/412 is designed to automatically reduce and stabilize the downstream pressure to a constant value, regardless of variation in demands, maintaining at the same time the upstream pressure within a minimum value. -
Page 5: Handling And Storage
XLC 312/412 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, (150 mm and smaller) 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 “authorization” of the upstream pressure pilot. T Maintenance CSA automatic control valves XLC 400 series have been designed with a sturdy and reliable construction to minimize servicing and possible malfunctioning. However we recommend to inspect them at least twice per year releasing the air accumulated inside the bonnet and checking the strainer inside the GR.I.F.O, if present, or placed as a separate entity in the circuitry.
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Page 9: Mrv - Downstream Pressure Reducing Pilot
XLC 312/412 MRV – Downstream pressure reducing pilot The downstream pressure reducing 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 reduce and stabilize... - Page 10 If that is not enough we strongly recommend you to contact CSA technical support or order the maintenance kit. Reassembly...
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Page 11: Msm - Upstream Pressure Sustaining/Relief Pilot
XLC 412 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 12 If that is not enough we strongly recommend you to contact CSA technical support or order the maintenance kit.
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Page 13: 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 14 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 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: Maintenance Of General Xlc Valve Body
XLC 412 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 XLC 412 Problems solving Problem Cause Solution The main valve The gate valves are closed Open the gate valves doesn’t 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 412 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-Rings (5 and 6) and to set the nut tight (11) to assure a proper torque between the diaphragm and the plane gasket.
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Page 22: Csa Sales Terms And Conditions
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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