CSA XLC 420 Скачать руководство пользователя страница 1 | Manualshive

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background image

CSA waterworks line

Upstream pressure sustaining/relief pilot

operated automatic control valve

Mod. XLC 420

Rev. 1

– 12/2014

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Содержание XLC 420

Страница 1: ...CSA waterworks line Upstream pressure sustaining relief pilot operated automatic control valve Mod XLC 420 Rev 1 12 2014...

Страница 2: ...nly Safety All safety messages in the instruction manual are flagged with the following symbol meaning danger caution and warning This means and makes reference to procedures that may lead to equipmen...

Страница 3: ...r information please consult us at www comeval es Contents Description 4 Handling and Storage 5 Installation 6 Set up 7 Fusion Powder Coated Valves 8 Disassembly 9 Interventions on the main XLC 400 13...

Страница 4: ...www comeval es Description The pilot operated control valve XLC 400 series Mod 420 is designed to automatically sustain and relief a upstream pressure value regardless of variation in demand and upst...

Страница 5: ...rcuit fittings pipes solenoids or position indicators Valves must be lifted only by cables chains located around the body through the flanges holes or eyebolts During hoisting always consider that the...

Страница 6: ...and upstream This to avoid the accumulation of air pockets during working conditions allow air discharge during pipe filling and entrance in case of pipe burst and draining A suitable by pass should b...

Страница 7: ...increase the spring force in the cover almost completely The upstream set pressure depends on the pilot setting and it is proportional to the charge of the spring Regulation chart are available on req...

Страница 8: ...ommon springs used Please consult us for more details Once the valve has reached the desired value set the locking nut and place the hood on top of the pilot Open the downstream gate valve completely...

Страница 9: ...through the pilot and therefore leading the pressure towards the main chamber and allowing for the valve to throttle which will result in a pressure increase because of the head loss created between t...

Страница 10: ...ck every detail to find damage in particular the diaphragm and the sealing seat gasket The pilot is very sturdy and the materials are designed to guarantee many years of working conditions for which g...

Страница 11: ...red in stainless steel AISI 303 and contains a fine mesh filter in AISI 304 8 to protect the pilot circuit from possible dirt maintained simply by unscrewing the tap 9 the intervention also called rea...

Страница 12: ...us 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 t...

Страница 13: ...ssible causes lead to defects on the diaphragm defects on the movements of the mobile block friction caused by deposits and corrosion problems on the gaskets defects on the sealing seat 15 13 21 14 17...

Страница 14: ...rapped inside the main body Remove the material from the valve The plane gasket of the obturator of the main valve and or of the pilot is ruined Replace the plane gaskets The sealing seat is ruined Re...

Страница 15: ...remaining pressure inside the valve before removing the bonnet Movement of the mobile block In order to verify the proper movement of the mobile block to proceed as follows isolate the main chamber cl...

Страница 16: ...s because of the high friction value Should that be the case simply proceed to a proper cleaning leaving it in a muriatic acid solution 5 as long as necessary shouldn t that be sufficient then proceed...

Страница 17: ...ue to its bind in the bearings Remove the nut and the washer 10 take off the upper flat 11 the O rings 21 check the diaphragm looking for damage and after having pulled out the plane gasket 13 by mean...

Страница 18: ...sealing seat guide make the holes of the diaphragm match the studs and position the spring 9 under the cover Set the nuts tight using a cross over pattern then put the circuitry back to its original...

Страница 19: ...the right to incorporate our latest design and material changes without notice or obligation Design features materials of construction and dimensional data as described in this manual are provided for...

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