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ALFA LAVAL UNIQUE MIXPROOF TANK OUTLET VALVE INSTRUCTION MANUAL—REV 8/21
6 Technical data
It is important to observe the technical data during installation, operation and maintenance. Inform the personnel about
the technical data.
6.1 Technical data
Unique is remote-controlled by means of compressed air. The valve is a normally closed (NC) valve.
The valve has two independent plug seals, forming a leakage chamber. In the leakage chamber there is only atmospheric
pressure during every working condition. In case of rare accidental leaking of product, this will flow into the leakage chamber
and be discharged through the leakage outlet.
When the valve is open, the leakage chamber is closed. The product can then flow from tank to pipeline.
TTeecchhnniiccaall ddaattaa
Max. product pressure
1000 kPa (10 bar) (145 psi)
Min. product pressure
Full vacuum
Recommended min. pressure for SpiralC
Clleeaann
2 bar (29 psi) - max. 8 bar (116 psi)
Temperature range
-5°C to +125°C (23°F to 257°F) - NBR only up to 85°C (175°F)
Air pressure
Max. 800 kPa (8 bar) (116 psi)
Products acc. to PED 97/23/EC
Category I, Fluids group 1,
DN
≥
125 only Fluids group 2
M
Maatteerriiaallss
Product wetted steel parts
Acid resistant steel AISI 316L
Other steel parts
Stainless steel AISI 304
Product wetted seals
EPDM, HNBR, NBR or FPM
Other seals
CIP seals: EPDM
Actuator seals
NBR
Surface finish
Standard
Internal/external Ra < 1.6 (64 µ”)
Optional
Internal bright/external standard Ra < 0.8 (32 µ”)
3A (US standard version)
Internal/external bright (internal polished) Ra < 0.8 (32 µ”)
N
NO
OTTE
E!! The Ra-values are only for the internal surface.
N
Nooiissee
One meter away from - and 1.6 meter above the exhaust the noise level of a valve actuator will be approximately 77db(A) without
noise damper and approximately 72 db(A) with damper - measured at 7 bars air-pressure.
S
Saaffeettyy cchheecckk
A visual inspection of any protective device (shield, guard, cover or other) on the supplied product shall be carried out
at least every 12 months.
If the protective device is lost or damaged, especially when this leads to deterioration of safety performance, it shall be replaced.
The fixing of the protective device should only be replaced with fixings of the same or an equivalent type.
IInnssppeeccttiioonn aacccceeppttaannccee ccrriitteerriiaa::
- It should not be possible to reach moving parts originally protected by a protective device.
- The protective device must be securely mounted.
- Ensure that screws for the protective device are securely tightened.
P
Prroocceedduurree iinn ccaassee ooff nnoonn--aacccceeppttaannccee::
- Fix and/or replace the protective device.
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