Indicating type differential pressure switch with bellows element
Type: P640
 
Service intended
 
The P640 series are designed to measure differential pressure from 25 kPa to 2.0 MPa at static pressure 10 MPa and have electrical contact. A set of two stainless steel bellows mounted on a force balance allows direct reading of the actual differential pressure.
 
Nominal diameter
 
150 mm
 
Accuracy
 
±1.0 % of full scale
±1.5 % of full scale
 
Scale range (MPa, kPa, bar, mbar)
 
0 ~ 25 kPa to 0 ~ 0.25 MPa (P641 model)
0 ~ 0.4 MPa to 0 ~ 2.0 MPa (P642 model)
 
Static pressure
 
Max. 10 MPa
 
Working temperature
 
Ambient : -20 ~ 65 °C
Fluid : Max. 100 °C
 
Degree of protection
 
EN60529/IEC529/IP55
 
Temperature effect
 
Accuracy at temperature above and below the reference temperature (20 ℃) will be effected by approximately
±0.5 % per 10 ℃ of full scale
 
 
Standard features
 
Pressure connection
 
Stainless steel (316L SS), Monel and Hastelloy-C
 
Element
 
Bellows
Stainless steel (316L SS), Monel and Hastelloy-C
 
Case and cover
 
ALDC12.1, Black painted Screwed type
 
Window
 
Safety glass
 
Dial
 
White aluminium with black graduations
 
Filling liquid for differential cell
 
Silicone oil
 
Pointer
 
Black painted aluminium alloy (Zero adjustable)
 
Contact
 
Contact rating : AC 250 V 3 A / 125 V 5 A
DC 250 V 0.2 A / 125 V 0.4 A / 30 V 4 A
Dielectric strength : AC 500 V / MIN
Type : Micro contact, One and two SPDT
 
Conduit connection
 
¾" PF(F)
 
Process connection
 
¼" NPT(F)
½" NPT(F) at 3-way and 5-way manifold valve
 
Standard accessories
 
Mounting bracket for 2" pipe
mounting with silver gray finished steel
 
Option
 
■ Remote seal - Not available with less than 40 kPa of differential pressure range
■ Mounting bracket with 316SS for 2" pipe
■ 3-way manifold valve (316SS, Monel)
■ 5-way manifold valve (316SS, Monel)
 
 
Download:  CATALOG