Trillium SARASIN-RSBD 78 Series, Инструкция по установке, эксплуатации и обслуживанию

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7.3 OUTLET PIPING
The safety valve must not support either the weight or the installation stresses of the outlet piping.
The backpressure should be reduced by using outlet piping with a nominal diameter of at least one size
greater than the nominal diameter of the safety valve outlet flange, together with large radius elbow.
Recommendations for steam applications
• The inside diameter of the exhausting piping must not be less than that of the safety valve outlet orifice.
• Release should be in the upwards direction and, a means of draining must be available in the
lower angle to prevent any accumulation in the body.
• The connection curve to the vertical piping must be as close as possible to the safety valve
outlet flange. The easiest solution is for the elbow to be bolted directly to the safety valve flange.
• The radius of the elbow must be as great as possible, ie, at least R ≥ 2.5 d.
7.4 INSTALLATION ON THE PROTECTED EQUIPMENT
The equipment nozzle on which the safety valve is to be connected must be designed to give direct flow.
There must be no obstruction between the equipment and the safety valve.
The pressure relief valve must be mounted on the upper part of the equipment which it is to protect.
Recommendations
• The safety valve must always be installed in the vertical position.
• The safety valve must be subjected to no stresses whatsoever from piping, connections or
drains.
• The use of reinforcement should be considered for the inlet piping connections, to support
dynamic loading which might be caused by reaction forces at the outlet connection.
• For maintenance operations, it is necessary to have sufficient space around and above the
safety valve to perform essential tasks.
Recommendations for steam applications
In the case of long outlet piping, and in order to achieve full safety requirements, the piping should be
designed to accommodate a drip pan or drip tank - see figure 3 p14. Such an arrangement will considerably
reduce stresses between the piping and its support.
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78 SERIE SAFETY RELIEF VALVE
SARASIN-RSBD
™