EMERSON Gate Valves, Fasani-EN Manuals

FASANI OPERATING AND SAFETY INSTRUCTION GATE VALVES - CAST GATE VALVES

Before installation these instructions must be fully read and understood

INSTALLATION 9. Check correct electric connection of actuator if any. Wrong connection may cause danger WARNING and heavily damage the valve. For safety reasons, it is important to take the 10. If the actuator is required to be repositioned following precautions before you start to work on the valve, it is necessary after this operation on the valve: to recalibrate the limit switches (this operation 1. Before installing, operating or maintaining the is described in the actuator maintenance valve, read all labels fitted to the valve and the manual). Non-calibrated actuators may present document. become dangerous and may cause 2. Use valves only for the intended purpose irreparable damage to the valve.

(according to contract).

3. Any additional modifications and/or 1. Gate valves are usually bidirectional. In accessories mounting on valves are not case the valve is unidirectional, by means allowed without approval from our technical of devices and/or accessories, the flow department. direction is indicated by an arrow applied on 4. Personnel making any adjustments to the the valve body. The flow direction must be valve should use equipment and clothing respected during installation. normally used to work with the process 2. Unless differently stated on the valve where the valve is installed. General Arrangement Drawing, installation 5. The line must be depressurized, drained, may be carried out: vented and cooled down before installing - for DN ≤ 24”, with stem oriented at an the valve. angle between +/- 90° from vertical 6. Handling and installing of valves, operators - for DN > 24”, with stem oriented at an and actuators must be carried out by qualified angle between +/- 10° from vertical personnel. 3. Gate valves can be installed on horizontal 7. Ensure the valve materials of construction or vertical pipelines. and pressure/temperature limitations marked 4. Remove protective covers from valve end on the identification label are above or equal faces and any transportation protection to service conditions for which the valve has applied to the valve stem (if applicable). been designed. 5. It is responsibility of the customer, 8. It is possible that some cavities within the depending on the installation, to arrange valve body may contain some water pockets, for a proper support for the valves and/or for example after hydrostatic test. If the the actuator, in particular for valves with water pockets are not drained and the valve pneumatic actuators. is subject to a temperature gradient, it is 6. For flanged valves ensure that coupling possible that the internal pressure may flanges and gaskets are clean and exceed the valve allowable pressure rating. undamaged. Where such a condition is possible, it is the For buttweld valves ensure that the weld responsibility of the purchaser to provide, profile is clean and in suitable condition or require to be provided for any design, for welding.

installation, or operating procedure to assure that the pressure in the valve will not exceed that allowed by the pressure rating of the valve.

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