Pressure Transducer

Pressure Transducer

The electrical interpretation of pressure is based upon the principle of operation of a strain gauge, wherein structural deformation of the load sensitive member of the device called wire grid is measured. When the gauge is subjected to load the wire grid is stretched, changing its diameter and length and its electrical resistance, thus through measurement of the change in resistance of the wire grid with the gage under stress and evaluation of the force producing  the load is obtained.

This operation involve load and pressure from 100 pound to more than 10,000 psi.

Desuperheaters

Desuperheaters

A desuperheaters is to reduce the temperature of superheated steam. The simplest construction of this device involves single or multiple spray nozzles that are inserted into the steam header, allowing water to be sprayed into the steam flow to reduce its temperature. By regulating the water quantity through the desuperheater, the degree of heat absortion can be controlled and desired steam temperature maintained. This mechanically atomized desuperheaters is used both small and large pipelines.

Other desuperheaters design utilize atomizing steam flow to produce a fine spray of atomized cooling water into the steam line. The steam assisted design offer excellent performance at low cost.

For small process lines, a desuperheater which relies on full circle water injection can maintain final temperature to within 20 degree F of saturation in pipe sizes down to 1 inch.

Instrument Junction Box Termination Dwg

Lightning Protection Installation

Grounding Installation

Condensate Seal Pot

Instrument Air Manifold

Instrument Loop Diagram

Standard Signal for Industial Instrumentation

Pneumatic
- Range

• 20kpa to 100 kpa
• 0.2 kg/cm2 to 1.0 kg/cm2
• 0.2 bar to 1.0 bar
• 3 psi to 15 psi
• 3 psi to 27 psi
• 6 psi to 30 psi

Electric
- Range

• 1 Vdc to 5 Vdc
• 0 Vdc to 10 Vdc
• 4mA to 20 mA
• 10mA to 50 mA

Instrument Process Hook-up

Loop Folder or Test Packs

Spiral Gage

Spiral type measuring element
Is used to measure pressure
Ranges from 18 to 4000 psi
It is made of a thin walled tube flattened on
opposite Side to produce an elliptical cross section
then formed into a spiral when pressure is applied
 into the open end tube tends to uncoil
The pointer is directly connected to the spiral
 to measure equivalent pressure reading

 

Loop Checking (Cold/Hot)

----------->>>> http://goo.gl/GqIGaE  <<<<---------------------------

Cable Insulation Testing

----------->>>>  http://goo.gl/fb2SCT  <<<<----------------

MANOMETER

U-tube Manometer

Difference in Height of the fluid
in the two arms is the difference
in the pressure between
PL & PH Expressed in Height of
the Fluid

 

 

Well type Manometer

 

It is an industrial manometer

whose one arm is replaced by a

large diameter well so that the

pressure differential is indicated

only by the height of the column

in single arm. The area AH of the well

should be as great a possible compared

to area AL of the arm for good readability

on the arm.

 

 

Inclined Tube Manometer

Used to accurately read small pressure
differences between PL and PH the
inclined arm serves to expand the scale
of the instrument thereby increasingly
readability.

--------->>>> http://goo.gl/VeZbsz  <<<<----------------------

Cable Termination

Cable Gland

Instrument Junction Box

Instrument Cable

Cable Way