EB 3009 EN
5
Process medium and scope of application
2 Process medium and scope of
application
Designed to protect saturated steam, nitro-
gen and compressed air networks against
backflow from directly connected systems.
−
Differential pressure set point
Δp = 0.2 bar · 0.3 bar
1)
/3 psi · 5 psi
1)
−
Valve sizes
DN 15
to
250/NPS ½ to 10
−
Pressure rating PN 25 · 40/
Class 150 · 300
−
Compressed air and nitrogen up to
80 °C · 150 °C
2)
/175 °F · 300 °F
2)
−
Saturated steam with compensation
chamber up to
220 °C/430 °F
−
Liquids
up to
80 °C/175 °F
1)
DN 200 and 250/NPS 8 and 10 version
2)
Version with FKM diaphragm
2.1 Transportation and storage
The device must be carefully handled, trans-
ported and stored. Protect the regulator
against adverse influences, such as dirt,
moisture or frost, during storage and trans-
portation.
When regulators are too heavy to be lifted
by hand, fasten the lifting sling to a suitable
place on the valve body.
Incorrectly attached lifting slings or supports.
Risk of injury and property damage due to
valve falling.
Securely fasten slings or supports to the
valve body and secure against slipping.
3 Design and principle of oper-
ation
The regulator prevents flowback from directly
connected systems. Observe the pressure
and temperature limits on the nameplate.
The regulator is open, provided the upstream
pressure is at least 0.2 bar/0.3 psi greater
than the downstream pressure. It closes auto-
matically when the downstream pressure ris-
es to or above the value of the upstream
pressure.
The regulator basically consists of the valve
(1) with seat (2) and plug (3) as well as the
opening actuator (10) with two diaphragms
(11).
WARNING
!
