Specialized manufacturer of Digital Pressure Meters and Load Cells

VALCOM CO.,LTD.

 

Sanitary Digital Differential Pressure Transmitter
VSD4 series PAT.
50kPa–1000kPa


*Image is ISO Ferrule 2S type

  • Determines differential pressure by computing the outputs from two pressure sensors.
  • Output 4-20mA (2 wire system) scaling function.
  • Chooses from One output (Only the output of difference pressure) and Two output (The output of difference pressure + The Output of low pressure side)
  • Pressure port with higher strength.
  • Safe and reliable construction with no sealed liquid.
  • Standard functions
    ●Display switch (Differential pressure, High pressure, Low pressure)
    ●Damping ●Loop check function ●FIX zero ●Zero shift
    ●Maximum/Minimum monitoring function
    ●Setting output status at error ●Key lock function
Measured medium Liquor, milk beverage, seasoning, pure water, chemical or other media.
(These vary according to sensor materials)
Pressure type Positive pressure
Pressure range Can be specified within the range of 50 kPa to 1000 kPa of rated capacity.
Output type 4–20mA(2-wire) Output scaling variable
Output scaling can be changed within the range of 10 to 100% of the rated capacity.

Specifications1 (Sensor assembly)

Pressure Port Type/Size ISO Ferrule/VARIVENT®/ISO Cap-nut/Other custom
Rated capacity 50kPa–1000kPa
Pressure port material Sensor: SUS316L, Equivalent to Hastelloy C-276, SUS329J4L
Other parts material Case part: Aluminum die casting,
Front sheet part: PET,
Radiating fin and adapter part: SUS304
Overload limit 400%R.C.
Destruction point 1000%R.C.

Specifications2 (Amplifier part + Sensor part)

Display 7 segment 4-digit LCD display Character height: Approx. 12.7mm
Display range Approx. 3.5 times/sec.
Accuracy at room temperature(*1)
(Including Nonlinearity, Hysteresis, and repeatability)
Differential pressure Scaling in 20–100%R.C.: ±0.7%F.S.±1digit.
Scaling in 10–20%R.C.: ±1.4%F.S.±1digit.
Low pressure 2 output Scaling in 20–100%R.C.: ±0.5%F.S.±1digit.
Scaling in 10–20%R.C.: ±1%F.S.±1digit.
1 output
(Without analog output)
±0.5%F.S.±1digit.
High pressure
(Without analog output)
±0.5%R.C.±1digit.
Temperature compensation range (Sensor assembly) -5–150°C (Measurement pressure medium)
Safe temperature range (Sensor assembly) -5–150°C (Measurement pressure medium)
Temperature effect on zero balance ±0.6%R.C./10°C or less (Rated 300kPa, 500kPa, 1000kPa)
±0.7%R.C./10°C or less (Rated 50kPa, 100kPa, 200kPa)
Temperature effect on load ±0.6%R.C./10°C or less (Rated 300kPa, 500kPa, 1000kPa)
±0.7%R.C./10°C or less (Rated 50kPa, 100kPa, 200kPa)
Ambient temperature and humidity range 0–50°C (No condensation or freezing)
Material Case part: Aluminum die casting,
Front sheet part: PET
Radiating fin and adapter part: SUS304
IP Rating Equivalent to IP67
Mass Approx. 670g
Accessories Operating manual 1 copy, Test report 1 copy, Cable gland
Brackets for exclusive use of the PP type
U character bolt for brackets for exclusive use of the PP type
Hexagon nut for PP type fixation
  • (*1)For the ferrule type, zero adjustment is to be made after the clamp is tightened.

About Model Selection

Display/Calibration

This product computes the difference between the pressures applied to high-pressure and low-pressure sensors by CPU, and outputs the result as an analog signal.
(Formula): Pressure applied to high-pressure sensor − Pressure applied to low-pressure sensor = differential pressure
<Notice>
Unlike the case with general differential pressure gauge, when using for measurement on tank, select a value greater than the maximum pressure for the "display/calibration range". When using for measurement on filter, etc., select a value greater than the line pressure. <Chooses from the model selection table ②>

— About a display and adjustment of an analog output —
This product can change analog output within the range 10 to 100% of the rated capacity.
One output: Only the output of difference pressure,
Two output: The output of difference pressure + The Output of low pressure side

— Analog output adjustment shipment (VSD4-SC1) —
Analog output is factory-adjusted to the desired value within the range 10 to 100%, with the display/calibration range while the set at 100%. (Option)
<Example>
When using a rated capacity of 100kPa, and outputting analog signal of 4 to 20mA for the pressure of 0 to 70kPa.
One output(Only the output of difference pressure):
VSD4-SC1: Differential pressure 0 to 70kPa
Two output(The output of difference pressure + The Output of low pressure side):
VSD4-SC1: Differential pressure 0 to 70kPa, Low pressure 0 to 70kPa

Analog output

Chooses from One output(Only the output of difference pressure) and Two output(The output of difference pressure + The Output of low pressure side) <Selected by Model selection table ③>

Sensor connection

Please choose from three types of the following figure.
<Selected by Model selection table ④>

Sensor connection

Rated capacity

Varies with the selected display/calibration range
<Notice>
*Rated capacity of high-pressure and low-pressure sensors must be selected within the same range.
<Selected by Model selection table ⑤>

Pressure port

Select type and material for high-pressure and low-pressure ports respectively.
Type: <Selected by Model selection table ⑥, ⑨>
Material: <Selected by Model selection table ⑦, ⑩>
(*Surface treatment for the pressure port varies with the selected material.)

Sensor cable

Select the cable length for high-pressure and low-pressure sensors. (Up to 40m)
<Selected by Model selection table ⑧, ⑪>

Model Selection

Example

Selection Check Model Specifications
1.Model VSD4 High temperature type: Temperature range of wetted parts -5–150°C
2.Display/Calibration   A 50.0kPa ⑤Model selection of rating capacity is [005]
B 50.00kPa
C 100kPa ⑤Model selection of rating capacity is [010]
D 100.0kPa
E 200kPa ⑤Model selection of rating capacity is [020]
F 200.0kPa
G 300kPa ⑤Model selection of rating capacity is [030]
H 300.0kPa
J 500kPa ⑤Model selection of rating capacity is [050]
K 500.0kPa
L 1000kPa ⑤Model selection of rating capacity is [100]
M 1.000MPa
3.Analog output/Power supply   16 4–20mA (2-wire system)
1 output (Only the output of difference pressure)
Response: Damping (Soft filter)
Default: 2 seconds (0.5Hz)
Safe load resistance: Power supply voltage DC24V (DC15.64–26.5V), 380Ωmax.
Cureent consumption Approx. 23mA
  26 4–20mA (2-wire system)
2 output (The output of difference pressure + The Output of low pressure side)
4.Sensor connection   AP High pressure side: Direct / Low pressure side: Separate
  PA High pressure side: Separate / Low pressure side: Direct
  PP High pressure side and Low pressure side: Separate
5.Rated capacity   005 50kPa ②Display/calibration range should be selected between A and B
  010 100kPa ②Display/calibration range should be selected between C and D
  020 200kPa ②Display/calibration range should be selected between E and F
  030 300kPa ②Display/calibration range should be selected between G and H
  050 500kPa ②Display/calibration range should be selected between J and K
  100 1000kPa ②Display/calibration range should be selected between L and M
High Pressure Side
6.Pressure Port
Type/Size
  F1 ISO Ferrule 1.5S
  F2 ISO Ferrule 2S
  F3 ISO Ferrule 2.5S
  F4 ISO Ferrule 3S
  F6 ISO Ferrule 4S
  V50A VARIVENT® DN50
  V65A VARIVENT® DN65
  V80A VARIVENT® DN80
  V100A VARIVENT® DN100
  R1 ISO Cap-nut 1.5S with Hexaganal nut (HEX61)
  R2 ISO Cap-nut 2S with Hexaganal nut (HEX76)
  M0 Single screw mount type Dedicated O-ring 1 pc attached
  M1 With JIS20K50A flange Dedicated O-ring 1 pc attached
  M2 With JIS20K80A flange Dedicated O-ring 1 pc attached
7.Pressure port material   Blank SUS316L
(Standard type)
Electrolytic polish
(Rz0.7µm, Ra0.2µm)
to all the rated apacity (⑤)
to all the type and size (⑥⑨)
  HS1 Equivalent to Hastelloy C-276
(Option)
Electrolytic polish
(Rz0.7µm, Ra0.2µm)
Select from the rated capacity of 300, 500, 1000kPa (⑤)
Select from the type and size of F1, F2, F3, M0 (⑥⑨)
[Made-to-order]
Negative pressure and compound pressure are not supported
  J4L SUS329J4L
(Option)
Buffing
(#400)
8.Connect to Amplifier   A Direct
  P□□ Length specification of a separate cable (1–40m)
<Example> 3m: [P03] / 15m: [P15] / 30m: [P30]
Low Pressure Side
9.Pressure Port
Type/Size
  F1 ISO Ferrule 1.5S
  F2 ISO Ferrule 2S
  F3 ISO Ferrule 2.5S
  F4 ISO Ferrule 3S
  F6 ISO Ferrule 4S
  V50A VARIVENT® DN50
  V65A VARIVENT® DN65
  V80A VARIVENT® DN80
  V100A VARIVENT® DN100
  R1 ISO Cap-nut 1.5S with Hexagon nut (HEX61)
  R2 ISO Cap-nut 2S with Hexagon nut (HEX76)
  M0 Single screw mount type Dedicated O-ring 1 pc attached
  M1 With JIS20K50A flange Dedicated O-ring 1 pc attached
  M2 With JIS20K80A flange Dedicated O-ring 1 pc attached
10.Pressure port material   Blank SUS316L
(Standard type)
Electro polish
(Rz0.7µm, Ra0.2µm)
to all the rated apacity (⑤)
to all the type and size (⑥⑨)
  HS1 Equivalent to Hastelloy C-276
(Option)
Electro polish
(Rz0.7µm, Ra0.2µm)
Select from the rated capacity of 300, 500, 1000kPa (⑤)
Select from the type and size of F1, F2, F3, M0 (⑥⑨)
[Made-to-order]
Negative pressure and compound pressure are not supported
  J4L SUS329J4L
(Option)
Buffing
(#400)
11.Connect to Amplifier   A Direct
  P□□ Length specification of a separate cable (1–40m)
<Example> 3m: [P03] / 15m: [P15] / 30m: [P30]

External dimensions (Unit: mm)

Output Specifications

Output Specifications

Membership is required to use the download service.
If you have already finished registration, log in from here.

■ E-mail address
■ Password

If not yet, click here to register for membership.