SFA15T218BAR,SFV20-25,TUV.SV Danfoss Safety relief valves

SFA15T218BAR,SFV20-25,TUV.SV Danfoss Safety relief valves product description

SFV 20 - 25 are standard, back pressure
dependent safety relief valves in angle-way
execution, specially designed for protection of
vessels and other components against excessive
pressure.
The valve is designed to meet the strict
quality demands and safety requirements for
refrigeration installations, specified by the
international classification societies.
The valve is recommended as an external and
internal safety relief valve in refrigeration plants.
The spring housing is closed tightly to avoid
refrigerant leakage.
The inlet flow diameters of the valves are:
• 18 mm ( 3 / 4 in.) for SFV 20, and
• 23 mm (1 in.) for SFV 25
The valves can be delivered with set pressures
between 10 and 25 bar g (145 and 363 psi g).
Standard pressure setting valves having "TÜV
Pressure Setting Certificate" with each valve, are
also available.

SFA15T218BAR,SFV20-25,TUV.SV Danfoss Safety relief valves Technical data

 Refrigerants
Applicable for the refrigerants HCFC, HFC, R717
(Ammonia), R744 (CO 2 ) within a
temperature range of –30°C/+100°C
(–22°F/+212°F).
Flammable hydrocarbons are not
recommended.
For further information please contact your
local Danfoss Sales Company.
• Pressure
Pressure setting range: 10 - 25 bar g
(145 - 363 psi g). For further information please
contact your local Danfoss Sales Company.
The valves are designed for:
Strength test:
43 bar g (624 psi g)
Leakage safety:
Same as set pressure
Important: The SFV safety relief valve is
dependent on the back pressure (if the back
pressure is higher than the atmospheric
pressure, the opening pressure will be higher
than stated set pressure).
Special circumstances such as vibrations
(which should be avoided) and oscillating
pressure may require an increased difference
between the operational pressure and the
closing pressure.
• Pressure setting
The operating pressure of the plant should be
at least 15% below the set pressure. This allows
a perfect re-seating of the safety relief valve
after having been activated.
• Temperature range
–30/+100°C (–22/+212°F)