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4 Description of the Valve
Outlet
Bypass
Inlet
Fig. 6: Valve with open check disc and closed bypass
Outlet
Bypass
Inlet
Fig. 7: Valve with open check disc at maximum travel and closed bypass
4.8 Scope of supply
4.9 Noise characteristic
When operated within the operating conditions documented in the order
confirmation and/or characteristic curves booklets, the valve will not exceed a sound
pressure level of 80 dB in acc. with IEC 60534-8-4. Unfavourable piping layouts or off-
design operating conditions may give rise to physical phenomena like cavitation,
resulting in significantly higher sound pressure levels.
MIL 90000
● Check disc in half open
● Main flow is increasing
● No flow through bypass
● Switching point
● Increasing process flow required
● Main flow reaches maximum
● No flow through bypass
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