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 

Đồng hồ Công tắc áp suất chênh áp P641 P642