Gardner Denver RFL Series, Owner'S Manual

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RFL-7-500 Page 15
5.4.4 Maintenance Indicator on Suction Air Filter
By means of the optical maintenance indicator fitted to the combination air filter of the compressor, an unacceptable level of
contamination of the filter element is indicated in good time.
The maintenance indicator must be clearly visible after the combination air filter is fitted.
The maintenance indicator must be clearly visible after the combination air filter is fitted.
5.4.5 Non-return Valve
The non-return valve prevents reverse flow when the machine is stopped. It is not completely gas-tight.
In the RFL 102, the non-return valve is integrated into the discharge port.
5.4.6 Thermometer
The thermometer for monitoring the compression temperature must be positioned together with the non-return valve in the
pressure pipe directly after the discharge port (for this purpose, attach a screw sleeve R½”). The thermometer must be inserted
into the pipe, at a depth of half the pipe diameter.
The indication range of the thermometer must cover the range from 0 to 300°C.
5.4.7 Safety Valve
After each compressor, a non-lockable safety valve must be fitted. The valve should be designed and adjusted to prevent
exceeding more than 10% above the higher permitted operating pressure. It must be able to expel the entire flow capacity of the
compressor/vacuum pump. The valve must also be fitted with a manual ventilation device.
If the safety valve is mounted, fitted incorrectly or interfered with, an increase of the pressure and temperature could
CAUSE AN EXPLOSION!
When fitting the safety valve, the following points must be observed:
•
Installation must be directly behind the machine before any other shut-off mechanism (especially the shut-off valve),
•
The setting must correspond to the maximum permitted operating pressure ( section 3.1 ).
•
The setting must be secure against unauthorized or accidental alteration,
•
The safety valve must not be blocked,
•
The safety valve must not be used to regulate the air volume in pressure operation.
Proper function must be confirmed each week by activating the manual ventilation device while the machine is
operating.the safety valve is mounted, fitted incorrectly or interfered with, an increase of the pressure and
temperature could CAUSE AN EXPLOSION!
5.4.8 Manometer
Used for continuous pressure monitoring. Measurement range conforming to the operating pressure. Installed directly after the
discharge port.
5.4.9 Contact Prevention
The drive of the machine and the hot pressure pipe must be provided with a contact guard. Unintentional touching of rotating or
moving machine parts must be impossible.
The surface temperature must not exceed 80°C.