Machine Tools Centre

Kolkata, West Bengal

Digital pressure gauges are a cost-effective solution in any pressure monitoring scenario where a local display is required. Features include minmax display, selectable units, 5 khz scan rate for transient capture and data recording. These instruments are commonly used as fuel pressure gauges, water pressure gauges and oil pressure gauges. Almost any installation previously utilizing mechanical or hydraulic pressure gauges can benefit from an upgrade to keller technology. Manufactured 100percentage in-house, keller products incorporate advanced pressure sensor technology combined with the latest in microprocessor-based electronics, resulting in outstanding performance over a wide temperature range at reasonable cost. Whether troubleshooting hydraulics systems or setting up an air-suspension on a military vehicle, digital pressure gauges make the job easier, and they last!

To meet the demand of oil exploration and refineriesANIhas developed a gauge for the pressure measurement of Crude Oil completely on the basis of their in-house development department know-how.

The gauge is designed as rugged and dependable keeping in view of application requirement of oil industries. To take care of vibration experienced in the Christmas tree suitable damping arrangement has been incorporated. Conventional indicating pointer has been eliminated and the dial moves alongwith the pressure vibration to indicate the variable against red mark on the case.

Diaphragm sealed gauge commonly known as chemical seal gauge are designed and recommended to isolate the measuring system of a pressure gauge from corrosive, pasty or dangerous fluid depending on the viceosity, pressure, temperature, solidification of a particular process medium.

The diaphragm seal has been filled under vacuum with the transmitting liquid, the pressure gauge/diaphragm seal assembly must never be dismantled.

A carefully designed corrogated diaphragm is used to achieve maximum flexibility and linearity with sufficient stroke to provide the displacement needed to produce full deflection of the sensing element.

The diaphragm is argon arc welded to the top chamber to ensure a perfect selling No LEAK. In some cases the diaphragm is coated OR lined with a second membrane (teflon). The welded construction facilitates removal of the gauge for repair/service without process shut down.

The displacement of the diaphragm is transmitted to the bourdon sensing element, through solidly filled liquid having low cubical expansion with greater temperature stability.

The gauge indicator is either directly fitted with the sealed chamber OR by means of capillary tube, thus permitting easier mounting OR the remote reading of the pressure.

These Gauges are recommended where fluid is highly corrosive, contaminated, viscous or liable to crystallize inside measuring system. The gauge above the diaphragm seal is filled with silicon oil that transmits the pressure acting on the diaphragm to bourdon tube Diaphragm is welded to the upper part of sealed unit and therefore it is possible to seperate the upper and lower parts to clean the diaphragm without removing the gauge. Diaphragm can be ANSI 316. Tantalum, Hastelloy C and Monel. Pressure gauge can be of type 1, 3 and 5 and process connection with Standard threads or flanged connection confirming to ANSI, BS or DIN Specifications. Available in dial size 100 mm and 150 mm, Accuracy1percentage in all standard ranges.

APPLICATIONS

• Chemical process industry
• Petrochemical industry
• For aggressive, highly viscous, crystallising or hot media

SPECIAL FEATURES

• Flange with a flush welded diaphragm
• Available for all common standards and nominal diameters
• When special materials are selected, all wetted parts (diaphragm and sealing face) are made of the selected material

DESCRIPTION

Diaphragm seals are used to protect the pressure measuring instrument from aggressive, adhesive, crystallising, corrosive, highly viscous, environmentally hazardous or toxic media. A diaphragm made of the appropriate material provides for the separation from the medium to be measured. Thus even the most difficult measuring requirements can be met by combining measuring instruments with diaphragm seals.

A fluid inside the system, which can be chosen to suit the particular application, hydraulically transmits the pressure to the measuring instrument.

Almost limitless application possibilities exist due to the large number of available variants, such as diaphragm seal designs or materials. The type of process connection (flange, threaded and sterile connection) and the basic method of manufacture are important design differentiation criteria.

Assembly of the diaphragm seal and measuring instrument is made via a direct assembly as standard or optionally via a cooling element or a flexible capillary

Product Description

digital pressure gauges are a cost-effective solution in any pressure monitoring scenario where a local display is required. Features include min/max display, selectable units, 5 kHz scan rate for transient capture and data recording. These instruments are commonly used as fuel pressure gauges, water pressure gauges and oil pressure gauges. Almost any installation previously utilizing mechanical or hydraulic pressure gauges can benefit from an upgrade to Keller technology. Manufactured 100percentage in-house, Keller products incorporate advanced pressure sensor technology combined with the latest in microprocessor-based electronics, resulting in outstanding performance over a wide temperature range at reasonable cost. Whether troubleshooting hydraulics systems or setting up an air-suspension on a military vehicle, digital pressure gauges make the job easier, and they last!

These thermometers enable measurement of temperature with an accuracy of +1percentage of the maximum scale value. This kind of thermometer system comprises a sensor bulb, transmitting capillary and a case containing a Bourdon Tube element. The system is filled with pressurised mercury. Temperature variation is measured by the Bourdon Tube system, and indicated on a dial.

These gauges are suggested where application calls for control of pressure and for audible or visible alarms. Gauges are provided with single, double or triple contacts adjustable throughout the range with different mode of switching action. Choice of low action normal contact, snap action magnetic contact or inductive contact, manufactured in Bottom/Back connection and Direct/Surface/Panel mounting. Available in Dial size 100 mm and 150 mm and in all standard ranges.

These gauges are ideal for Chemical and Fertilizer Plants, Refineries, Power Stations and where gauges are installed outdoors. Measuring System of Phosphor Bronze, Brass, SS 316 are available. Case of die cast aluminium with screwed bezel black epoxy coated. Exclusive protection IP55; Accuracy1percentage, Dial Size 100, 150 and 250mm; available in all standard process connections.

Available in all standard ranges vacuum and pressure upto 1000 kg/cm2standard connection 1/2 NPT & 1/2 BSP, other standards are also available. Receiver Gauge input 1 kg/cm2.

APPLICATIONS

• Intended for adverse service conditions where pulsating or vibration exists
• Suitable for all gaseous and liquid media that will not obstruct the pressure system or attack copper alloy parts
• Hydraulics
• Compressors, shipbuilding

SPECIAL FEATURES

• Vibration and shock resistant
• Especially sturdy design
• NS 63, 100 approved by German Lloyd and Gosstandart approval
• Scale ranges up to 0 1, 000 bar

DESCRIPTION

Design
EN 837-1

Nominal size in mm
50, 63, 100

Accuracy class
NS 50, 63: 1.6NS 100: 1.0

Scale rangesNS 50: 0 1 to 0 400 barNS 63, 100: 0 0.6 to 0 1000 baror all other equivalent vacuum or combined pressure and vacuum ranges

Pressure limitation

• NS 50, 63:Steady: 3/4 x full scale valueFluctuating: 2/3 x full scale valueShort time: Full scale value
• NS 100:Steady: Full scale valueFluctuating: 0.9 x full scale valueShort time: 1.3 x full scale value

Permissible temperature
Ambient: -20 +60 CMedium: +60 C maximum

Temperature effect
When the temperature of the measuring system deviatesfrom the reference temperature (+20 C):Max. 0.4 percentage/10 K of the span

Ingress protection
IP 65 per EN 60529 / lEC 529

These gauges are suitable for low pressure measurement of non-corrosive gases, commercial heating, gas distribution and filtration. Measuring System of Brass or SS 304 Capsule. Case Material cast aluminium. Available in pressure range 0-50 mm WC upto 10000 mm WC in pressure, vacuum and compound ranges. Available in all standard process connections NPT, BSP etc. ; in dial sizes upto 150 mm Accuracy upto 2percentage.

APPLICATIONS

• Robust design and ingress protection IP 54
• For gaseous, dry and non-aggressive media
• Medical, vacuum, environmental, laboratory technology, for contents measurement and filter monitoring

SPECIAL FEATURES

• Zero adjustment through window
• Stainless steel case
• Special location of connection on request
• Low scale ranges from 0 6 mbar

DESCRIPTIONS

Design
EN 837-3

Nominal size in mm
63, 100, 160

Accuracy class
1.6

Scale ranges
NS 63: 0 25 mbar to 0 600 mbarNS 100: 0 10 mbar to 0 600 mbarNS 160: 0 6 mbar to 0 600 mbaror all other equivalent vacuum or combined pressure and vacuum ranges

Pressure limitation
Steady: Full scale valueFluctuating: 0.9 x full scale value

Permissible temperature
Ambient:
-20 +60 C
Medium:+100 C maximum+ 80 C maximum (with NS 100 and 160 back mount)

Temperature effect
When the temperature of the measuring system deviates from the reference temperature (+20 C):Max. 0.6 percentage/10 K of full scale value

Ingress protection
IP 54 per EN 60529 / lEC 529