Welcome to our integrated facility for design and manufacture of high pressure gas cylinder valves
 

do's & don't

 

Usage & Handling of Cylinder Valves

Doís

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Check visually damage to valve body, PRD, Operating mechanism, and/or any other external fitments effecting function and safety before filling.

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Check Markings on the Valve body and PRD for Gas service, Pressure rating and Inlet & outlet size to verify suitability.

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Cylinder valves must be adequately cleaned for intended service.

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Rotate valve operating mechanism from fully open to close position and check movement for any obstruction. Open Valve slowly but fully to prevent development of high pressure surge and heat generation on down stream.

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Check condition of inlet and outlet threads especially the first thread to ensure that threads are not damaged before inserting valve into cylinder. A damaged lead thread could adversely affect insertion and therefore should be repaired.

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Only use lubricants, compatible for gas service, pressure range and application.

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When the cylinder is not in use valve should be in closed position with outlet cap in place to prevent contamination and entry of foreign particles into cylinder.

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Inspect Pressure relief device before each refilling. Burst disc pressure is a function of :

  1. Disc thickness.

  2. Material and specification of the disc

  3. Hole size of the retainer nut

  4. Tightening torque

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Changing any of the four parameters would lead to burst disc not operating at rated design pressure intended for the application.

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Use only original manufacturerís Parts & Assemblies for repair / reconditioning of cylinder valve.

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Valve repair and reconditioning should be performed by properly trained personnel.

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Only use proper fitting wrenches as oversize wrenches will round off spindle corners.

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Install and operate valve at manufacturerís recommended tightening torque. Avoid over tightening of the operating mechanism to prevent inadvertent wear.

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Ensure presence of residual pressure inside the cylinder before filling on residual pressure valves to verify the residual pressure unit is working by pushing a RPV check pin against the piston.

 

Donít

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Donít drop the cylinder in an inverted or nearly inverted position as this could adversely damage the valve.

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Donít lift, drag or move a cylinder using hand wheel as a handle.

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Donít reuse a valve that has less than two full threads showing after it is installed into cylinder hand tight. (Except for specially designed short inlet threads to allow low tensile brass valves to withstand a high impact energy).

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Donít use poor fitting jaws on valving machines that could cause :

  • Rounding off of valve wrench flats.

  • Possible interference with valve outlet, Pressure relief device etc.

  • Bending as well as torsional forces into the valve.

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Donít use extra lever / Adapter on Key operating valve to obtain greater mechanical advantage to operate the valve to close and open.

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Donít install a reconditioned valve into service unless it has been tested to its specification.

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Donít continue to operate the valve in case of abnormality in function such as it becomes noisy and harder to operate.

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Donít attempt to change soft seating material of the spindle seat. It is very likely that the proper fitting will not be carried out at the users end.

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Donít open the RPV unit assembly for valves with Residual pressure function.