Pressure Gauges  
Iinstrumentation & Gauges
 
Pressure Gauges
Commercial Gauges
Dial Thermometers
Digital Gauges
Accessories
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Comparison Test Pump
Combustion Test Kit
Rotometer
Transmitters
Calibration Services


 

 

 

       Standard


SS316 or Phosphor Bronze wetted parts in 4", 6", 8" and 10" dial sizes with MOC: SS/Cast Al/Sheet metal casings. We provide Vacuum, Compound, Ammonia (with temperature scale) pressure gauges in Kg/cm2 or in dual scale, contact for details our factory for OEM dials.

Dial Size 100/150/200/250 mm
Case SS/Cast A1/ Sheet metal ( Only 150mm Dial )
Bezel Screwed / Flanged / Bayonet type
Bourdon SS316/ Brass
Movement SS304/ Brass

Ranges

0-1/2.5/4/6/7/10/16/25/40/60/70/100
/160/250/400/600/700 Kg/Cm2 & Bar

IP 66 ( for 8 & 10 " Cast Al casing )
Window Sheet glass / Toughened / Arcylic glass ( optional ) / shetter glass
Dial Aluminium, White Baground with black imprint
Mounting Direct / Surface / Panel
Connection 3/8" BSP, 1/4" BSP, 1/2" BSP, 3/8" NPT, 1/2" NPT, M20X1.5
Position Bottom / Back

Accuracy

+/- 1%

       Contact Type

 

"We calibrate each pressure gauge individually to guarantee an accurancy of 1% (between 10% and 90% FSD)".

Limit of over pressure
25% of span till 100 Kg/cm2
15% for 160 Kg/m2 and above
Contacts Rating
1amp 230 VAC (w/o relay)
(in 6" cast Al casings)
5 amp 230 VAC (with relay)

Offer Vapor Pressure Gauges with contacts

Dial Size
100/150/200/250 mm
Case
SS/Cast A1/ Sheet metal ( Only 150mm Dial)
Bezel
Screwed / Flanged / Bayonet type
Bourdon SS316/ Brass
Movement SS304/ Brass

Ranges

0-1/2.5/4/6/7/10/16/25/40/60/70/100
Kg/Cm2 & Bar

IP 66 ( for 8 & 10 " Cast Al casing )
Window Sheet glass / Toughened / Arcylic glass ( optional ) / shetter glass
Dial Aluminium, White Baground with black imprint
Mounting Direct / Surface / Panel
Connection 3/8" BSP, 1/4" BSP, 1/2" BSP, 3/8" NPT, 1/2" NPT, M20X1.5
Position Bottom / Back

Accuracy

+/- 1%

 

       Remote Seal Gauge


Remote seal pressure gauges are specifically designed for most of the chemical and process industry applications where the pressure gauge is to be protected from process temperature and pulsation
in the pressure line.

Can also be used for panel mounting instead of local gauge indication. Can be provided with glycerine or silicon oil filling. Forbes Marshall, Hyderabad can empathise your instrumentation requirements and will always be ready with a solution for your complex
process gauge requirements.

Length of the capillary and other specific details can be enquired from our marketing help desk with minimal details of your process conditions.

Dial Size
100/150/200/250 mm
Case
SS/Cast A1/ Sheet metal ( Only 150mm Dial )
Bezel
Screwed / Flanged / Bayonet type
Bourdon SS316/ Brass
Movement SS304/ Brass

Ranges

0-1/2.5/4/6/7/10/16/25/40/60/70/100
/160/250/400/600/700 Kg/Cm2 & Bar

IP 66 ( for 8 & 10 " Cast Al casing )
Window Sheet glass / Toughened / Arcylic glass ( optional ) / shetter glass
Dial Aluminium, White Baground with black imprint
Mounting Direct / Surface / Panel
Connection 3/8" BSP, 1/4" BSP, 1/2" BSP, 3/8" NPT, 1/2" NPT, M20X1.5
Position Bottom / Back

Accuracy

+/- 1%

Remote Gauges are avilable with

  • Capillary of 2 meters (standard) upto 18 meters.
  • Isolator flange is of SS304.

 

       Glycerine / Silicon-oil filling for dampening vibration


Dial Size
100/150/200/250 mm
Case
SS/Cast A1/ Sheet metal ( Only 150mm Dial)
Bezel
Screwed / Flanged / Bayonet type
Bourdon SS316/ Brass
Movement SS304/ Brass

Ranges

0-1/2.5/4/6/7/10/16/25/40/60/70/100
/160/250/400/600/700 Kg/Cm2 & Bar

IP 66 ( for 8 & 10 " Cast Al casing )
Window Sheet glass / Toughened / Arcylic glass ( optional ) / shetter glass
Dial Aluminium, White Baground with black imprint
Mounting Direct / Surface / Panel
Connection 3/8" BSP, 1/4" BSP, 1/2" BSP, 3/8" NPT, 1/2" NPT, M20X1.5
Position Bottom / Back

Accuracy

+/- 1%

Gauges are avilable with glycerine filling to dampen the vibrations at the pointer.


       Diaphragm Seal gauge


Chemical seals are used when media can falsify the pressure measurements due to high temperature, high iscosity (media in paste form) or their property to crystallise. Chemical seals transmit process
pressure to the measuring instrument, with the diaphragm forming a hermetic seal between the medium and measuring instrument. With various process connection systems, the chemical seals are especially suitable for general process engineering applications. For extreme high temperatures provision of using capillary or remote chemical seals.

The medium wetted parts of these chemical seals are manufactured in stainless steel as standard. In connection with a Bourdon tube pressure gauge they are suitable for pressure ranges from 0....2.5 Kg/cm2 to 0...700 Kg/cm2. The parts in contact with the medium can be manufactured in special materials for particular service conditions.

When the permissible rated pressure is exceeded, a specially designed diaphragm prevents damage to the chemical seal.

Features:
Various process connections For medias of higher temperature Overload protection by diaphragm bed Dismantling of the upper section does not alter the measurement characteristics Special materials for extreme service requirements Mountable on instrumentation and control equipment

Pressure ranges:
O...2.5 Kg/cm2 to 0...700 Kg/cm2

Dial Size
100/150/200/250 mm
Case
SS/Cast A1/ Sheet metal ( Only 150mm Dial )
Bezel
Screwed / Flanged / Bayonet type
Bourdon SS316/ Brass
Movement SS304/ Brass

Ranges

0-1/2.5/4/6/7/10/16/25/40/60/70/100
Kg/Cm2 & Bar

IP 66 ( for 8 & 10 " Cast Al casing )
Window Sheet glass / Toughened / Arcylic glass ( optional ) / shetter glass
Dial Aluminium, White Baground with black imprint
Mounting Direct / Surface / Panel
Connection 3/8" BSP, 1/4" BSP, 1/2" BSP, 3/8" NPT, 1/2" NPT, M20X1.5
Position Bottom / Back

Accuracy

+/- 1%

Diaphragm seal PG with SS316 /Teflon disc, other options:

  1. PTFE coating on SS316
  2. Solid Teflon
  3. SS316/304

Applications:
Plant and apparatus construction, Process engineering, Chemical and petrochemical industries

Flange Rating 150 # 300 # 600#

       Test Gauges

Forbes Marshall test gauges can be used for reliable testing of your process gauges, manufactured to an accuracy of 0.5%. Available in the range of 2.5 to 700 kg/cm 2.

With MOC
Bourdon
SS 316
Stem
Brass/SS 316
Movement
Brass/SS 304
Casing Sheet metal / Cast Al / S.S.

 

Dial Size
100/150/200/250 mm
Case
SS/Cast A1/ Sheet metal ( Only 150mm Dial )
Bezel
Screwed / Flanged / Bayonet type
Bourdon SS316/ Brass
Movement SS304/ Brass

Ranges

0-1/2.5/4/6/7/10/16/25/40/60/70/100
/160/250/400/600/700 Kg/Cm2 & Bar

IP 66 ( for 8 & 10 " Cast Al casing )
Window Sheet glass / Toughened / Arcylic glass ( optional ) / shetter glass
Dial Aluminium, White Baground with black imprint
Mounting Direct / Surface / Panel
Connection 3/8" BSP, 1/4" BSP, 1/2" BSP, 3/8" NPT, 1/2" NPT, M20X1.5
Position Bottom / Back

Accuracy

+/- 1%


 



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