Norgren P74F Series Datasheets - Manual (Page 2)

P74F Smooth Start/Exhaust Valve
Littleton, CO USA Phone 303-794-2611 www.norgren.com ALE-17-9
All Dimensions in Inches (mm)
Technical Data
System air supply: Turn on system air supply prior to applying pilot signal to operator.
Failure to do so may cause valve to continuously exhaust.
Fluid: Compressed air
Maximum pressure solenoid operated:
Dependant on solenoid rating
[must not exceed 250 psig (17 bar)]
Maximum pressure pilot operated: 250 psig (17 bar) max.
Minimum operating pressure: 44 psig (3 bar)
Operating temperature solenoid operated:
Dependant on solenoid rating
[must be within range 0°* to 175°F (-20°* to 80°C)]
Operating temperature pilot operated:
0°* to 175°F (-20°* to 80°C)
* Air supply must be dry enough to avoid ice formation at temperatures below 35 ° F (2 ° C).
Air pilot port:
ISO Rc1/4 with ISO Rc main ports
ISO Rc1/4 with ISO G main ports
1/4” 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” PTF with PTF main ports
Typical flow with 90 psig (6.3 bar) inlet pressure and pressure drop of 7 psig (0.5 bar):
57 dm 3 /s (P1 to P2 = Cv 4.4) (P2 to P3 = Cv 5.6)
Snap pressure:
Full flow when downstream pressure reaches 50 – 80% of inlet pressure
Charge time:
For 2 liter downstream volume and 90 psig (6.3 bar) inlet pressure:
0.2 sec. minimum
76 sec. maximum
Materials
Body: Aluminium
Intermediate body: Aluminium
Elastomers: Synthetic materials
Filter discs: Sintered plastic
Internal components: Brass/steel
Top plate: Zinc
Exhaust bonnet: Zinc
Typical Performance Characteristics
INLET PRESSURE: psig (bar g)
FLOW CHARACTERISTICS
0 20 40 60 80 100 dm 3 /s
AIR FLOW
0 40 80 120 160 200 240 scfm
0.8
0.6
0.4
0.2
0
PRESSURE DROP
bar d
10
8
6
4
2
0
psid PORT SIZE: 1/2"
44
(3)
91
(6.3)
58
(4.0)
116
(8)
150
(10)
2 quart (2 liter) downstream volume
PERCENTAGE SNAP POINT
0 20 40 60 80 100 120
CHARGE TIME - (S)
16
12
8
4
0
OUTLET PRESSURE
bar g
200
160
120
80
40
0
psig
SNAP POINT
8.35 (212)
6.14 (156)
1/2 PTF (G1/2)
1.18 (30) A/F
3.31 (84)
2.91 (74)
1.46 (37)
1/2 PTF (G1/2)
1.18 (30) A/F
5.67 (144)
3.46 (88)
1/4 PTF (Rc1/4)
3.31 (84)
2.91 (74)
1.46 (37)
8.70 (221)
6.50 (165)
3.31 (84)
4.37 (111) max. 3.78 (96) min. 1.46 (37)
1/2 PTF (G1/2)
1.18 (30) A/F
6.38 (162)
4.21 (107)
1/4 PTF (Rc1/4)
3.31 (84)
4.37 (111) max. 3.78 (96) min. 1.46 (37)
1/2 PTF (G1/2)
1.18 (30) A/F
Solenoid operated
Solenoid operated plus
manual shut-off with lockout
Air pilot operated
Air pilot operated plus
manual shut-off with lockout