1. Application

Single Flange Differential Pressure The bellows of the transmitter is used to prevent the medium in the pipeline from directly entering the pressure sensor component of the differential pressure transmitter. It uses a filling liquid such as silicone oil to transmit pressure between it and the transmitter.

SM39PWB-DFL Single Flange Differential Pressure Transmitter Used to measure the level, density, pressure, and flow of liquids, gases, or steam, and then convert it into 4mA ~ 20mADC HART current signal output. It can also communicate with HART handheld communicator for parameter setting, process monitoring, etc. SM39PWB-DFL Single Flange Differential Pressure Transmitter measurement range (before migration) ） is      0…1kPa ~ 2MPa， Single The rated pressure of the flange is: 1.6/4MPa、 6.4MPa 、10MPa、150psi、 300psi or 600psi。

2. Working Principle and Structure

SM39PWB-DFL Single Flange Differential Pressure Transmitter Structurally composed of SM39PWB-CY series differential pressure transmitters and welded Single flange assembly . Its working principle is the same as that of SM39PWB-CY series differential pressure transmitters, except that the positive pressure side pressure transmission path is slightly different: the pressure acting on the high-pressure side first passes through Single the diaphragm and filling liquid on the flange, then through the transmitter body, to the high-pressure side of the measuring sensor.

3. Input

Measurement Parameters Differential pressure, level Measurement Range

Lower limit: -100%URL and up (continuously adjustable) Upper limit: to +100%URL (continuously adjustable) Range

Table 1 Range Code and Range Correspondence Table

Table 2 Single Flange Correspondence table between and minimum range

The minimum range of the differential pressure level transmitter should be the larger value of the minimum range in Table 1 and Table 2 . The adjusted range must not be less than the minimum range. The maximum range of the level transmitter should be the minimum value of the maximum range of the transmitter body and Single Flange rated pressure.

4. Output

Output Signal

Two-wire, 4mA ~ 20mADC HART output, digital communication, HART protocol loaded on 4mA ~ 20mADC signal.

Output signal limits: I mi n =3. 9 m A ， I max =2 0.5m A

5. Response Time

The damping constant of the amplifier component is 0.1s ; sensor and Single Flange time constant is 0.2s ~ 2s , depending on the range and range ratio. The additional adjustable time constant is: 0.1s ~ 60s . The additional adjustable time constant is: 0.1s ~ 60s。

6. General Conditions

1. 1. Installation Conditions

Through Single Flange The transmitter can be directly fixed to any position. A good condition is to keep the process flange axis vertical, with positional deviation A correctable zero offset will be generated. The electronic casing can be rotated up to 360° , and a positioning screw can fix it in any position.

1. 2. Environmental Conditions

Ambient Temperature

Minimum: Depends on the filling liquid Maximum: 85℃

When using LCD display and fluororubber seal -20℃ ~ 65℃ Storage Temperature / Transportation Temperature

Minimum: Depends on the filling liquid Maximum: 85℃

Relative Humidity

0% ~ 100%

Impact Resistance

Acceleration: 50g

Duration: 11ms Vibration Resistance

2g to 500Hz Electromagnetic Compatibility (EMC)

See table on next page 3 Electromagnetic Compatibility Appendix

1. 3. Process Media Limits

Media Temperature Limit: -30℃ ~ 180℃

Transmitter body pressure limit from 3.5kPa absolute pressure to rated pressure, the protection pressure can be greater than the rated pressure by 1.5 times, applied to both sides of the transmitter simultaneously.

  Single Flange Rated Pressure

ANSI Standard 准 ：150psi ~ 600psi DIN Standard: PN 1.6MPa ~ PN 10MPa

Unidirectional Overload Limit

The low-pressure side is the rated pressure of the transmitter body, and the high-pressure side is Single Flange rated pressure, and a correctable zero drift may occur.    Weight

DN 50/2 ″ Approximately 7 ~ 10kg； DN 80/3 ″ Approximately 8 ~ 11kg； DN 4 ″ Approximately 9 ~ 12kg。 Explosion-proof Performance

NEPSI Explosion-proof certificate: Ex dⅡC T6 NEPSI Intrinsic safety certificate: Ex iaⅡC T4 Permitted operating temperature: -40℃ ~ 65℃

1. 4. Power Supply and Load Conditions

Power Supply Power Voltage is 24V R≤(Us-12V)/I max kΩ where I max =23 mA

Maximum supply voltage: 42VDC

Minimum supply voltage: 12VDC，15VDC (Backlit LCD display)

Digital communication load range: 230Ω ~ 600Ω Material

Measuring diaphragm: Stainless steel 316L

Diaphragm: Stainless steel 316L , Hastelloy C , Tantalum, FEP 、 PFA 、 PTFE Film-coated flange: Stainless steel 304

Filling liquid: Silicone oil, vegetable oil

Seal: Nitrile rubber （ NB R ） 、Fluororubber（ FK M ）、 Polytetrafluoroethylene（ PTFE ）

Transmitter housing: Aluminum alloy material, epoxy resin coating on the surface Housing seal: Nitrile rubber（ NBR ）

Nameplate: Stainless steel 304 Electrical Connection

M20 × 1.5 Cable sealing clip, terminal block suitable for 0.5 m m 2 ~ 2.5 m m 2  wires.

Process Connection

The transmitter low-pressure side has UNF 7/16 ″ Internal thread. On the high-pressure side of the transmitter Single Flange Compliant ANSI Standard or DIN Standard. Direct installation, refer to the dimensional drawing.

Ingress Protection Rating IP67

Table 3 Electromagnetic Compatibility Appendix

Note 1: A Performance Level Description: During testing, performance is normal within the limits of the technical specifications.

Note 2： B Performance Level Description: During testing, function or performance is temporarily reduced or lost, but can recover automatically, the actual operating status, storage and data are not changed.