Swagelok Changeover SCO, Руководство пользователя, Страница: 8 / 20

SCO User Manual
8
Relief Outlet Connection
Outlet Isolation Valve
Captured Inlet
Vent Valves
Inlet 1
(primary source, changeover handle
in up position)
Inlet 2
(secondary source, changeover
handle in up position)
Captured Inlet Vent
Valves Connection
Inlet Gauges (PI)
Outlet Regulator
Outlet Gauge (PI)
Changeover
Lever Handle
System Startup
•
CAUTION Swagelok ball valves are designed to be used in a fully open or fully closed position.
•
CAUTION Valves that have not been cycled for a period of time may have a higher initial actuation torque. For
valves not actuated for a period of time, initial relief pressure may be higher than the set pressure.
•
CAUTION A packing adjustment may be required periodically for needle and ball valves to increase service life
and to prevent leakage.
•
CAUTION Some system applications require relief valves to meet specific safety codes. The system designer
and user must determine when such codes apply and whether these relief valves conform to them.
Country/Regional standard relief valves are to be maintained in accordance with local rules and
regulations of the country in which they are installed.
•
CAUTION Swagelok proportional relief valves should never be used as ASME Boiler and Pressure Vessel Code
safety relief devices.
•
CAUTION Swagelok proportional relief valves are not “Safety Accessories” as defined in the Pressure Equipment
Directive 2014/68/EU.
1. Ensure the changeover lever handle is in the
correct orientation, coinciding with the desired
primary bottle source. The black arrow on the
handle hub will point to the primary bottle source.
2. Verify the inlet vent valves are CLOSED.
3. Verify the outlet isolation valve is CLOSED
(where applicable).
4. Supply bottle pressure to both inlets .
5. Verify the inlet gauges are reading correct pressures.
6. Set the outlet regulator (if present) to desired outlet pressure.
7. Verify the relief valve is not relieving pressure.
8. Open the outlet isolation valve to begin system flow (if
applicable).
9. Adjust outlet pressure by turning the handle on the outlet pressure
control regulator (if present) while the system is flowing.