Service intended
P991 explosion proof type differential switch series are bellows type, and these are primarily used for detecting the draft pressure in thermal power plants.
Fluid
Air and gas
Repeatability
±1.5% of fullscale
Dead band
Fixed. 0.25 ~ 0.8 kPa or less
Differential pressure range (kPa)
0 ~ 4 kPa to 0 ~ 20 kPa
Static pressure
500 kPa
Working temperature
●Ambient : -20 ~ 65°C
●Fluid : Max. 60°C
Degress of protection
EN60529/IEC529/IP65
Material
●Pressure connection : 316SS
●Bellows : Stainless steel (316L SS)
●Gasket : PTFE
Case and cover
●ALDC 12.1
●Silver gray painted aluminium
Mounting
Surface wall mounting
Setpoint adjustment
Internal
Process connection
¼" NPT (F)
Conduit connection
¾" PF (F)
Operating environment
Hazardous area refer to the explosion-proof item for information
Optional
●3-way manifold valve
●5-way manifold valve
Contact type
●One SPDT
●One DPDT
Contact rating
●AC 125 V / 250 V, 15 A and DC 30 V, 2 A
DC 125 V, 0.5 A for resistance load
●AC 125 V / 250 V, 15 A and DC 30 V, 1 A
DC 125 V, 0.05 A for Inductive load
Approval by standard
KOSHA 12-AV2B0-0057
Explosion proof differential pressure switch Model P991 series.pdf 118 KB
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