4_可调式防爆压力开关Type901pex系列选型资料_english
Beck.
The adjustable
pressure switches Prescal® in Ex zones.
Pressure switch 901..Ex Prescal®
with adjustable switching pressure for Ex zones 0, 1, 2 and 21, 22
Application
Adjustable pressure switch monitoring overpressure, vacuum or differential pressure of liquid and gaseous – also aggressive – media.
The pressure switch uses a scaled adjustment knob to enable the adjustment of trip and reset pressure without the use of a screwdriver.
Specifications
ATEX ECtypeexaminationDevicecategoryIgnitionprotectiontype CEconformity Otherapprovals |
II 1/2G or II 2G and II 2D
Ex ia IIB T4 Ga/Gb or Ex ia IIC T4 Gb Ex ia IIIB T135C Db
ATEX Directive 94/9/EC RoHS-Directive 2011/65/EC EC Gas Device Directive 90/396/EC
type examination by TÜV Südwest and DVGW
Medium Temperatureranges:Mediumandambienttemperature StoragetemperatureTrippressureranges:Overpressure Vacuum Differentialpressure Max.workingoverpressureSwitchingdifferential TrippressuretoleranceMaterials: TubeconnectionsThreadedconnections Diaphragm WeightElectricalrating Electricalconnection Cableconduit ProtectioncategoryMechanicalworkinglifeReducingnozzles |
-20° C to +85° C
-40° C to +85° C
5 to 20 mbar (min. measuring range) 7 to 12 bar (max. measuring range)
-5 to -20 mbar (min. measuring range)
-300 to -700 mbar (max. measuring range)
5 to 20 mbar (min. measuring range) 10 to 50 mbar (max. measuring range)
0.2 to 25 bar/-1 bar (refer to table) 3 to 2,000 mbar; depending on pressure range (refer to table)
±10% from setpoint
5 / 6.5 and 10 mm, PA / PPS M10x1 / G1/8 to G1/2 PA/PVDF/stainless steel/brass
depending on medium; NBR, silicone, FKM (Viton®), EPDM, for 901.8x silicone (other materials on request).
30 to 300 g (depending on housing material)
24 VDC/100 mA; 30 VDC/45 mA
AMP flat plug, 6.3 mm x 0.8 mm,
Ex i-circuits
This pressure switch can be used in potentially explosive zones for gas in zones 0, 1, 2 and for dust in zones 21, 22. In the safe area, an associated isolating means (separating barrier, switching amplifier) must be connected before. The entire isolating circuit must then be proved to keep inherent safety.
For this purpose, the power specifications (P, I, U) of the barrier must be lower and the characteristics (L, C) higher than those of the pressure switch and of the connection line (blue colour).
Characteristics:
Gas for IIB,C: 30VDC /60mA; 24VDC/100mA
Dust for IIIB: 30VDC /60mA/0,6W Capacitance - Ci 0 µF
Inductance - Li 0 mH
Arrangement of contacts
for 901.6x Ex, 901.8x Ex, only for 901.7x Ex 901.9x Ex
acc. to DIN 46244, or push-on 2
screw terminals 3
M16x1.5, with integrated cable
strain relief 1
IP 54 (with cover 6371)
over 106 switching operations diameter optionally 0.3/0.5/0.8 mm
2
3
– P 1
Pressure connections
Type | Tube connections | Threaded connections | ||||||
5.0 mm | 6.5 mm | 10.0 mm | M10 x1 | G1/8 | G1/4 | G1/2 | ||
901.61-65 Ex | PA | PA, PPS | PA, PPS | PA, PVDF, MS, V2A | PA, PVDF, MS, V2A | MS, V2A | MS | |
901.66-68 Ex | MS, V2A | MS, V2A | MS, V2A | MS | ||||
901.71-76 Ex | PA | PA, PPS | PA, PPS | PA, PVDF, MS, V2A | PA, PVDF, MS, V2A | MS, V2A | ||
901.77-78 Ex | MS, V2A | MS, V2A | MS, V2A | MS | ||||
901.81 Ex | PA | |||||||
901.91-93 Ex | MS | MS, V2A | MS, V2A | |||||
PPA = polyamide, PVDF = polyvinyldifluoride, PPS = polyphenylensulfide, MS = brass
Overpressure ranges
Type | Setting range for between and | Reference scale accuracy | Switching differential | Maximum positive working pressure standard/extended | Maximum negative working pressure standard/extended | |
901.61 Ex | 5 | 20 mbar | ± 10 % | 3 mbar | 0.5/4 bar | –/–1 bar |
901.62 Ex | 10 | 50 mbar | ± 10 % | 5 mbar | 0.5/4 bar | –/–1 bar |
901.63 Ex | 25 | 100 mbar | ± 10 % | 10 mbar | 0.5/4 bar | –/–1 bar |
901.64 Ex | 50 | 250 mbar | ± 10 % | 20 mbar | 1/4 bar | –/–1 bar |
901.65 Ex | 100 | 500 mbar | ± 10 % | 50 mbar | 1/4 bar | –/–1 bar |
901.66 Ex | 250 | 1,000 mbar | ± 10 % | 150 mbar | 10 bar | –1 bar |
901.67 Ex | 500 | 1,500 mbar | ± 10 % | 250 mbar | 10 bar | –1 bar |
901.68 Ex | 1,000 | 3,000 mbar | ± 10 % | 500 mbar | 10 bar | –1 bar |
901.91 Ex | 1.0 6.0 bar | ± 10 % | 0.5 – 2.0 bar | 25 bar | –1 bar | |
901.92 Ex | 4.0 9.0 bar | ± 10 % | 0.5 – 2.0 bar | 25 bar | –1 bar | |
901.93 Ex | 7.0 12.0 bar | ± 10 % | 0.5 – 2.0 bar | 25 bar | –1 bar | |
Vacuum ranges
901.71 Ex | – 5 – 20 mbar | ± 10 % | 3 mbar | 0.5/4 bar | –1 bar |
901.72 Ex | – 10 – 50 mbar | ± 10 % | 5 mbar | 0.5/4 bar | –1 bar |
901.73 Ex | – 25 – 100 mbar | ± 10 % | 10 mbar | 0.5/4 bar | –1 bar |
901.74 Ex | – 50 – 125 mbar | ± 10 % | 20 mbar | 0.5/4 bar | –1 bar |
901.75 Ex | – 75 – 200 mbar | ± 10 % | 25 mbar | 1/4 bar | –1 bar |
901.76 Ex | – 100 – 300 mbar | ± 10 % | 30 mbar | 1/4 bar | –1 bar |
901.77 Ex | – 200 – 500 mbar | ± 10 % | 75 mbar | 1/4 bar | –1 bar |
901.78 Ex | – 300 – 700 mbar | ± 10 % | 75 mbar | 1/4 bar | –1 bar |
Differential pressure ranges
901.81 Ex | 5 20 mbar | ± 10 % | 3 mbar | 100 mbar | –100 mbar |
901.82 Ex | 10 50 mbar | ± 10 % | 5 mbar | 100 mbar | –100 mbar |
Pressure switch 901..Ex Prescal®
with adjustable switching pressure for Ex zones 0, 1, 2 and 21, 22
901.6x/7x 901.8x
Covers
6371 IP 54 / 6372 IP 65
13 |
45.5 |
53.5 |
Ø6.5 |
35 |
50 |
Ø 45
Ø 46
15 |
23 |
23 |
15 |
11 |
6374 IP 54 / 6375 IP 65
Ø 45
Ø 45
Ø 46
13 |
45.5 |
50.5 |
50 |
12 |
22 |
16 |
12 |
22 |
54 |
30 |
11 |
22 |
901p_ex_data_english1/15 |
Technicaldatasubjecttochangewithoutpriornotice. |
Viton® is a registered trademark of DuPont Dow Elastomers.
Prescal® is a registered trademark of Beck GmbH Druckkontrolltechnik.
Beck GmbH Druckkontrolltechnik
P.O. Box 11 31
D-71140 Steinenbronn
