P74F
Excelon廬 74
Soft Start/Dump Valve
3/8
"
, 1/2
"
, 3/4
"
Port Size
q
EXCELON design allows inline or modular installation
q
Controlled increase of downstream pressure on
start up
q
Solenoid or air pilot operation
q
High forward flow capacity
q
High flow dump facility
q
Optional manual dump facility with lockout
Soft start valves allow a controlled increase of pressure
onto downstream cylinder/machines offering protection
to personnel and equipment.
The dump feature can be activated by removing power
to the solenoid or the air pilot, or by operating the
manual dump.
Note: Turn on system air supply prior to applying pilot
signal to operator. Failure to do so may cause valve to
continuously exhaust.
Technical Data
Fluid: Compressed air
Maximum pressure solenoid operated:
Dependant on solenoid rating
[must not exceed 17 bar (250 psig)]
Maximum pressure pilot operated: 17 bar (250 psig) max.
Minimum operating pressure: 3 bar (44 psig)
Operating temperature solenoid operated:
Dependant on solenoid rating
[must be within range -20擄C* to +80擄C (0擄F* to +175擄F)]
Operating temperature pilot operated:
-20擄C* to +80擄C (0擄F* to +175擄F)
* Consult our technical service for use below +2擄C
Materials:
Body: Aluminium
Intermediate body: Aluminium
Elastomers: Synthetic materials
Filter discs: Sintered plastic
Internal components: Brass/steel
Top plate: Zinc
Exhaust bonnet: Zinc
Air pilot port:
ISO Rc1/4 with ISO Rc main ports
ISO Rc1/4 with ISO G main ports
1/4鈥?PTF with PTF main ports
Exhaust port:
ISO G1/2 with ISO G main ports
ISO G1/2 with ISO Rc main ports
1/2鈥?PTF with PTF main ports
Typical flow with 6,3 bar (90 psig) inlet pressure and pressure
drop of 0.5 bar (7 psig):
57 dm
3
/s (P
1
to P
2
= Cv 4.4) (P
2
to P
3
= Cv 5.6)
Snap pressure:
Full flow when downstream pressure reaches 50 鈥?80% of
inlet pressure
Charge time:
For 2 litre downstream volume and 6,3 bar (90 psig)
inlet pressure:
0,2 sec. minimum
76 sec. maximum
7/97
Ordering Information
See
Ordering Information
on the following
pages.
ISO Symbols
Solenoid operated
Air pilot
Our policy is one of continuous research and development.
We reserve the right to amend, without notice, the specifications given in this document.
N/AL.8.200.610.01
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