The valve is supplied for installation and can be installed in the pipeline without additional assembly or manufacturing work. Information on installing and commissioning the valve can be found in the valve Installation and Operation Manual.
|SR.No.||INSTALLATION & COMMISSIONING|
|1||We recommend that the installation and commissioning should be checked by an authorized person using the checklist.|
|2||Follow the safety instructions before installation, Maintenance or Removing the Valve from the Line.|
|3||It must be installed as per the standard practices outlined in the Maintenance and Installation Instructions.|
|4||It must be installed as per the standard practices outlined in the Maintenance and Installation Instructions.|
|SR.No.||Physical Location and Placement : Here are few Tips & recommendations|
|1||The valve must be accessible in all circumstances, with Sufficient space for the actuator, pneumatic connections, and any other components of the final control element.|
|2||There should be proper mechanisms in place to allow for manual proofing, to minimize airflow constraints and potential clogging, pneumatic piping to the actuator should be kept as short and straight as feasible|
|3||The valve should be placed in a low-vibration environment, since long or kinked pneumatic tubing might increase valve closing time.|
|4||If significant vibrations are expected, further care should be taken to protect pneumatic connections, or vibration must be minimized using suitable dampening elements.|
WARNING : Risk of malfunction due to incorrect selection or incorrect installation and operating conditions. Only use valves in safety-instrumented systems if the necessary conditions in the system are fulfilled.
Additional Information –
|SR.No.||Mechanical and Pneumatic Installation|
|1||If the process fluid contains solids that could clog the valve, a strainer must be added.|
|2||Blow Out pipelines to remove Pipe scale, Welding spatter, fine chips, and other foreign material.|
|3||Before installing the valve make sure that pipeline flow is in the same direction as arrow indication on the valve.|
|4||The actuator is placed on the valve and correctly inserted into the pipeline in accordance with the installation and operating instructions. Make Sure, the valve accessories are installed correctly.|
|5||Install the valve in accordance with established piping best practices.|
|6||Use self-centering Gasket for Installation of Valve in Line.|
|7||The Globe control valve’s fail-safe position (stem extends or retracts) is set correctly.|
|8||The Tightening torques (E.g., flanged joints) are measured and monitored.|
|9||The required flow direction is followed. The direction of flow is indicated by the arrow on the valve.|
|10||An Air Filter Regulator should be fitted in Air Line ahead of any instrument on the Valve|
|1||The Valve configuration & Material of Construction were selected to meet specific pressure, temperature, pressure drop and controlled fluid condition. Since the body and trim combinations are limited in their pressure drop and temperature Range|
|2||The materials used in the valves are appropriate for the process medium.|
|3||The entire Globe control valve assembly (valve, actuator, valve accessories with Tubing-Fitting) has been tested for compatibility for the specified application (pressure, temperature).|
|4||Based on the required transit time (Opening and Closing) and thrust, the actuator is properly sized.|
|SR.No.||Operation & maintenance (O & M))|
|1||The flow through the valve is not obstructed, and the plug stem is not clogged.|
|2||The valve is only utilized in applications that fulfil the size requirements specified during the purchasing process.|
|3||Avoid personal Injury or damage to process system from sudden release of pressure of process fluid.|
|4||Disconnect all operating lines to the actuator that provide air pressure or control signals.|
|5||The End User should inspect the Earthing Facility and Valve Parts on a|
|6||Only fully trained, authorized, and competent operational people do maintenance, and only original components are utilized for spare parts.|
regular basis. • Only fully trained,
|7||Maintenance is performed as described in the section on servicing in the associated valve Installation, Operation and Maintenance Manual.|
|8||Equipment should be cleaned regular basis.|
|9||Cleaning the Valve Stem on a regular basis will keep dirt and grit out of the Packing.|
|10||Vary air pressure in air lines and fittings to the Actuator as per specification to determine the actual Travel Scale Indication.|
|11||Check for air leaks in all air lines and fittings to the Valve Actuator and Accessories|
|12||Ensure that the combined action of Valve Positioner and Valve provide the desired Valve Stem Movement. Also ensure the required fail-safe position of Valve.|
* The operator oversees the proof test interval and the scope of testing. The operator must create a test plan that specifies the proof tests and the time between them. We propose creating a checklist to summarize the proof test criteria. Periodic proof tests must be performed at the interval (or frequency) determined by a SIL verification calculation.
*To maintain the overall SIF’s necessary safety integrity, the proof tests must be conducted more frequently than (or as frequently as) indicated within the SIL verification calculation.
* The results of periodic proof tests and partial valve stroke tests (if any conducted) must be documented and evaluated on a regular basis.
* Malfunction because of a non-observance of the required inspection requirements. To test the fail-safe action properly, the following requirements must be met:
* Regularly check the safety-instrumented function of the entire SIS loop. The test intervals are determined, for example on calculating each single SIS loop in a plant (PFDavg ).
Additional Information :
We recommend performing the proof tests based on a checklist.
|Visual inspection to avoid systematic failure|
|SR.No.||To avoid systematic failure, inspect the Control valve regularly. The frequency and the scope of the inspection lie within the operator’s responsibility. Take application-specific influences into account, such as:|
|1||Valve Plug stem obstruction|
|2||Corrosion problems (destruction primarily of metals due to chemical and physical processes)|
|3||Material fatigue and Process medium-induced wear|
|4||Abrasion (material removed by solids contained in the process medium)|
|5||Deposits of a medium size Aging (damage induced by light and heat to organic materials such as plastics and elastomers).|
|6||Chemical attack (organic materials, e.g., plastics or elastomer, which swell, leach out or decompose due to exposure to chemicals.|
Record any faults in the valve and inform UNIFLOW of them in writing
|SR.No.||Safety-Related fail-safe action|
|1||Apply signal pressure to the actuator to allow the valve to travel all the way to its final position (completely open or closed).|
|2||Deactivate the signal pressure. As a result, the valve must move to its fail-safe position.|
|3||Verify that the valve reaches the required end position within the time limit.|
|4||Verify that the valve reaches the required end position within the time limit.|
Safety-Instrumented functions of valve accessories :
* Check the safety-instrumented function of valve accessories. Refer to the associated safety manuals of Valve Positioner, Solenoid valve etc.
* Only perform the work on the valve described in the Instruction, Operation and Maintenance Manual