Pressure Transmitter WIKA Model A10

/0 Comments/in /by

Pressure Transmitter WIKA Model A10

A pressure transducer is a transducer that converts pressure into an analog electrical signal. There are various types of pressure transducers, such as a capacitive pressure transducer, digital output pressure transducer, voltage/current output pressure transducer, and many others.

However, in all types of pressure transducers, the conversion of pressure into an electrical signal is achieved by the physical deformation of the diaphragm of the pressure, which then produces an electrical resistance change proportional to the pressure.

The Pressure Transmitter WIKA Model A10 is precision engineered and manufactured to fit many industrial and OEM pressure measurement applications.

The rugged design provides resistance to vibration, shock, wide temperature variations, RFI and other extreme environmental conditions that are typical of industrial and OEM applications.

Performance and reliability are enhanced by the all stainless steel welded measuring cell that eliminates the need for soft sealing materials that may deteriorate over time. The state-of-the-art manufacturing and assembly process increases the long term reliability of the A-10.

Primary applications include process control and automation, hydraulics, pneumatics and machine controls.

Applications

  • Mechanical engineering
  • Machine tools
  • Process control and automation
  • Hydraulics and pneumatics
  • Pumps and compressors

Technical Features

Gauge Pressure (Bar)

0 … 0.05 / 0 … 0.1 / 0 … 0.16 / 0 … 0.25 / 0 … 0.4 / 0 … 0.6 / 0 … 1 / 0 … 1.6 / 0 … 2.5 / 0 … 4 / 0 … 6 / 0 … 10 / 0 … 16 / 0 … 25 / 0 … 40 / 0 … 60 / 0 … 100 / 0 … 160 / 0 … 250 / 0 … 400 / 0 … 600 / 0 … 1,000

Absolute Pressure (Bar)

0 … 0.1 / 0 … 0.16 / 0 … 0.25 / 0 … 0.4 / 0 … 0.6 / 0 … 1 / 0 … 1.6 / 0 … 2.5 / 0 … 4 / 0 … 6 / 0 … 10 / 0 … 16 / 0 … 25

Vacuum and +/- measuring range (Bar)

-0.025 … +0.025 / -0.05 … 0 / -0.05 … +0.05 / -0.05 … +0.15 / -0.05 … +0.2 / -0.05 … +0.25 / -0.1 … 0 / -0.1 … +0.1 / -0.15 … +0.15 / -0.16 … 0 / -0.2 … +0.2 / -0.25 … 0 / -0.25 … +0.25 / -0.3 … +0.3 / -0.4 … 0 / -0.5 … +0.5 / -0.6 … 0 / -1 … 0 / -1 … +0.6 / -1 … +1.5 / -1 … +3 / -1 … +5 / -1 … +9 / -1 … +15 / -1 … +24

Output Signals

  • Current (2-wire): 4 … 20 mA
  • Voltage (3-wire): DC 0 … 10 V
  • Voltage (3-wire): DC 0 … 5 V
  • Voltage (3-wire): DC 1 … 5 V
  • Ratiometric (3-wire): DC 0.5 … 4.5 V

Voltage supply

  • 4 … 20 mA: DC 8 … 30 V
  • DC 0 … 10 V: DC 14 … 30 V
  • DC 0 … 5 V: DC 8 … 30 V
  • DC 1 … 5 V: DC 8 … 30 V
  • DC 0.5 … 4.5 V: DC 8 … 30 V
  • DC 0.5 … 4.5 V ratiometric: DC 5 V ± 10 %

Temperature Ranges

  • Ambient: 0 … +80 °C

Process Connections

  • G ⅛ B – G ¼ B – G ¼ female – G ¼ female, with flange connection – G ⅜ B – G ½ B
  • G ¼ A – G ½ A – M14 x 1.5
  • ⅛ NPT – ¼ NPT – ¼ NPT female – ½ NPT
  • R ¼ – R ⅜ – R ½
  • PT ¼ – PT ½ – PT ⅜

Ingress protection

  • IP65
  • IP67

 

Adjustable Dial thermometer WIKA model  S55

/0 Comments/in /by

Adjustable Dial thermometer WIKA model  S55

Adjustable Dial thermometer work on the bimetal, expansion or gas actuation principle. This enables scale ranges of -200 to +700 °C in different class accuracies, response times and resilience to environmental influences. Diverse connection designs, stem diameters, and individual stem lengths enable a flexible measuring point design. All thermometers are suited for operation in a thermowell if necessary.

What is Bimetallic Thermometer

The bimetallic thermometer consists of a bimetallic strip. A bimetallic strip is made of two thin metals which have different coefficients of expansion. The two metal strips are joined together by brazing, welding or riveting so that the relative motion between them is arrested. The bimetallic strip is in the form of a cantilever beam. An increase in temperature will result in the deflection of the free end of the strip  This deflection is linear and can be related to temperature changes. The radius of the curvature of the bimetallic strip which was initially flat is determined using the following relationship.

Model S50 WIKA thermometer

The model 55 bimetal thermometer has been developed and is manufactured in accordance with the EN 13190 standard. The high-quality thermometer has been designed especially for the requirements of the process industry. The temperature measuring instrument completely manufactured from stainless steel. The model 55 satisfies the high requirements for resistance against aggressive media. As an option, the case, the stem, and the process connection can be made from 316Ti (1.4571) to fulfil the highest requirements.

To allow optimum fitting to the process, individual insertion lengths and different process connections can be selected. When it comes to harsh climatic conditions at the place of use, model 55 is the right choice. It can be used at temperatures ranging from -40 °C to +70 °C (optional also up to -50 °C or -70 °C).

Applications

  • General process instrumentation in the
  • chemical and petrochemical industries
  • oil and gas industries
  • energy and water/wastewater industries
  • Temperature measurement in harsh and aggressive environments

Technical Features

the scale ranges

  • from -70 … +600 °C

Measuring element

  • Bimetal coil

Nominal size in mm

  • 100
  • 160

Connection designs

  •  S: Standard (male threaded connection)
  • 1: Plain stem (without thread)
  • 2: Male nut
  • 3: Union Nut
  • 4: Compression fitting (sliding on the stem)
  • 5: Union nut and loose threaded connection

Model

Model S5550

Back mount, adjustable stem, and dial

  • Dial: 100mm

Model S5551

Back mount, adjustable stem, and dial

  • Dial: 160mm

Material

The case, bayonet ring

  •  Stainless steel 1.4301 (304)

Stem, process connection

  • Stainless steel 1.4571 (316Ti)

Dial

  • Aluminium white, black lettering

Window

  • Instrument glass

Zero adjustment

  • on the case back side, external only for adjustable stem and dial (option)

Insertion length

  • L1 63 … 1,000 mm

minimum/maximum length is dependent on the measuring range and diameter

Temperature limits for storage and transport

  • -50 … +70 °C

Permissible ambient temperature

  •  -40 … +70 °C (with/without filling liquid)

Permissible operating pressure at the stem

  •  max. 25 bar, static

Ingress protection

  • IP65 per IEC/EN 60529

Limit Switch

/0 Comments/in /by

Limit Switch

A Limit Switch is an electrical contact that is closed (or opened in some cases) by a variety of mechanical attachments (rollers, “whiskers”, levers, etc.) typically used as an input to a control system (relays, PLCs, etc.) to indicate the presence or absence of a physical object. Non-contact sensors like optical or metallic proximity switches are also sometimes called limit switches.

Presence Sensing is the act of detecting the presence or absence of an object with a contact or non-contact sensing device. The sensors then produce an electrical output signal that can be used to control equipment or processes.

Mechanical limit switches are contacted sensing devices widely used for detecting the presence or position of objects in industrial applications. The term limit switch is derived from the operation of the device itself. As an object (or target) makes contact with the operator of the switch, it eventually moves the actuator to the “limit” where the electrical contacts change state.

Through this mechanical action, electrical contacts are either opened (in a normally closed circuit) or closed (in a normally open circuit). Inductive proximity, capacitive proximity, and photoelectric sensors perform this same process through non-contact sensing.

Limit Switches Application

A limit switch is an electro-mechanical device that consists of an actuator mechanically linked to a set of contacts. When an object comes into contact with the actuator, the device operates the contacts to make or break an electrical connection. Limit switches are used in a variety of applications and environments because of their ruggedness, simple visible operations, ease of installation and operational reliability.

Limit switches are used in an assortment of applications and environments due to their ruggedness, simplicity of installation and reliability of operation.

They are available in a variety of body, rotary arm styles, operation requirements, and environmental factors including moisture, contamination, temperature, shock, and vibration. Other factors to consider when selecting a limit switch include operating force, reset force, over-travel, pre-travel, along with safety requirements. Limit switches are also available in four unique categories: Global, Medium-duty, Heavy-duty, and Safety Locking an Unlocking Styles.

Some application of limit switches:

  • Material handling – packaging, moving, warehousing, distribution
  • Working where people cannot. Inside a sawmill, a high-speed saw quickly reduces logs into construction beams.
  • Food & beverage packaging, distribution
  • Fire safety
  • Manufacturing – automotive/heavy equipment, machining, marine/aviation, glass & plastics
  • Metals – mining, refining, processing, forming
  • Commercial applications
  • Control cabinets
  • Heavy Conveyors
  • Metal processing
  • Gates, Doors, Hinges
  • Control cabinet doors
  • Indoor & outdoor environments

Mechanical limit switch operators are available in many shapes and sizes based on their functionality and application. Switches can be divided into two types: momentary and maintained. Momentary, or “spring return” switches return to their normal state as soon as the actuator is released from the object it is sensing. Maintained switches will remain in the actuated position even after the actuator has been released.

Wika Pressure Gauge 232.50

/0 Comments/in /by

Wika Pressure Gauge 232.50

The pressure gauge is an instrument used to measure or display pressure.Wika Pressure Gauge 232.50 is bourdon tube pressure gauges are the most frequently used mechanical pressure measuring instruments.

Generally, it displays pressure in Bar (Unit of Pressure). The Bourdon tube is the namesake of Eugéne Bourdon, a French watchmaker and engineer who invented the bourdon gauge in 1849. Over the years, the bourdon tube has entrenched itself as the elastic element in most pressure gauges in the application today.

When the internal space of the bourdon tube is pressurised, the cross-section is thus altered towards a circular shape. The hoop stresses that are created in this process increase the radius of the c-shaped tube. As a result, the end of the tube moves by around two or three millimetres. This deflection is a measure of the pressure. It is transferred to a movement, which turns the linear deflection into a rotary movement and, via a pointer, makes this visible on a scale.

Bourdon tube variants

With the c-shaped bent Bourdon tubes, pressures up to 60 bar can be displayed. For higher pressures, helical or spiral-type Bourdon tubes are used. Depending on the geometry, material and material thickness, pressures up to 7,000 bar can be realised. Depending on the requirement, the pressure elements are made of copper alloys, stainless steels or special materials such as Monel.

The Bourdon pressure gauge operates on the principle that, when pressurized, a flattened tube tends to straighten or regain its circular form in cross-section. The Bourdon tube comes in C, helical, and spiral shapes—although most gauges employ the C shape, which is the type of Bourdon pictured at the top of the article.

Lets start talk about the 232.50 pressure gauge from Wika.
Wika is one of the best instrumentation manufacturer in the wold.
Saba Dejlah locatated in UAE as a trading company can supply all kind of Wika products for any destination in the world.

Technical Data of 232.50

Design

  • EN 837-1

Nominal size in mm

  • 63, 100, 160

Accuracy class

  • NS 63: 1.6
  • NS 100, 160: 1.0

Scale Ranges

  • NS 63: 0 … 1 to 0 … 1,000 bar
  • NS 100: 0 … 0.6 to 0 … 1,000 bar
  • NS 160: 0 … 0.6 to 0 … 1,600 bar

or all other equivalent vacuum or combined pressure and vacuum ranges

Pressure limitation

NS 63:

  • Steady: 3/4 x full-scale value
  • Fluctuating: 2/3 x full-scale value
  • Short time: Full-scale value

NS 100, 160:

  • Steady: Full-scale value
  • Fluctuating: 0.9 x full-scale value
  • Short time: 1.3 x full-scale value

Permissible temperature

Ambient:

  • -40 … +60 °C without liquid filling
  • -20 … +60 °C gauges with glycerine filling

Medium:

  • +200 °C maximum without liquid filling
  • +100 °C maximum with liquid filling 1)

Temperature effect

When the temperature of the measuring system deviates from the reference temperature (+20 °C):

  • max. ±0.4 %/10 K of full-scale value

Ingress protection

  • IP65 per EN 60529 / lEC 60529

Process connection

  • Stainless steel 316L (NS 63: 1.4571),
  • Lower mount (LM) or lower back mount (LBM), NS 63 centre back mount (CBM)
  • NS 63: G ¼ B (male), 14 mm flats
  • NS 100, 160: G ½ B, 22 mm flats

Pressure element

  • Stainless steel 316L C-type or helical type

Movement

  • Stainless steel

Dial

  • Aluminium, white, black lettering,
  • NS 63 with pointer stop pin

Pointer

  • Aluminium, black

Case

Stainless steel, with pressure relief at case circumference, 12 o’clock (NS 63) and on the back of the case (NS 100
and 160), Scale ranges ≤ 0 … 16 bar with compensating valve to vent case

Window

  • Laminated safety glass (NS 63: Polycarbonate)

Ring

  • Cam ring (bayonet type), stainless steel

Filling liquid (for model 233.50)

  • Glycerine 99.7 % (Glycerine 86.5 % for scale range ≤ 0 … 2.5 bar)
Air Vent Valve

Air Vent Valve

/0 Comments/in /by

Air Vent Valve

An Air Vent Valve is a safety device that discharges air at the water supply piping in order to avoid air related problems in the water piping systems.

The product line-up includes both air vents for use on pipelines for liquids and those for use on pipelines for steam.

The air vents for piping carrying liquids make use of Free Float steam trap technology for a tight seal and excellent durability.

There are two types of air vent series for piping carrying liquids. One features a specialized rapid initial air vent to discharge initial air when the supply of liquid begins, and the other features an automatic air vent to discharge air regularly during operation.

The air vents for steam piping make use of thermostatic steam trap technology to discharge not only cold initial air, but also hot air.

Application of Air Vent

  • The cold and hot water supply system
  • Hot water boiler
  • The solar hot water system
  • Other various devices
  • Air conditioning system
  • Hot water heater appliance
  • Pressure tank

Type of Air Vent

Rapid Air Vent

Air Vent

  • This type of air vent use where the discharge of large quantities of initial air is required. Once the valve closes, it remains closed even if air enters. Also, install an automatic air vent if it is necessary to discharge air during operation.

Applications

  • Water lifting pumps
  • fire-extinguishing equipment
  • water transport lines
  • water storage tanks
  • hot water tanks
  • holding tanks for liquids.
  • Water
  • hot water

Air VentAutomatic Air Vent

Automatic air vents are most suited for heating systems and other closed circuit hot water systems which require an efficient and automatic removal of air whilst the system fills with water.

A vacuum break is fitted onto the bottom of the valve in order to prevent an air lock forming and encourages air to be released from the water within the system.

 

 

Steam Air Vent

Balance-pressure type air vents are usually recommended for removing air in steam systems. Bimetal type air vents also exist, however, these are not recommended for removing hot air from steam systems because the valve opening temperature is more or less fixed. This is different from the valve on balanced pressure type air vents, which opens at a temperature that is a certain number of degrees lower than the saturation temperature of the steam. Hot air is therefore discharged at all times regardless of fluctuations in steam pressure.

Types of Industrial Thermometer

Types of Industrial Thermometer

/0 Comments/in /by

Types of Industrial Thermometer

Thermometers are devices that measure temperature or a temperature gradient using a variety of different principles. Temperature is simply the numerical measurement of hot and cold—which has great importance in a wide variety of applications.

Temperature affects our comfort, cooks our food and is critical to making many products upon which we rely. Given the extreme importance of temperature across so many aspects of modern life, thermometers are a familiar tool to us.

Temperature is the most commonly measured parameter in commercial and industrial settings. Industries as diverse as food processing, pharmaceuticals, cold storage, paper manufacturing, and others absolutely rely on process temperatures being within a certain range.

Though there are many temperature sensing options, thermometers provide an inexpensive, versatile and reliable choice.

Gas-actuated Thermometers

The Gas-actuated-thermometers are suitable for raw ambient conditions. A case, ring, and stem are made of stainless steel. With a liquid filling, the thermometers can be used at measuring points with high vibrations.

The thermometers with capillary facilitate separation of the display unit from the measuring point. The measuring system in the gas thermometers consists of the stem, capillary and Bourdon tube in a case.

The complete measuring system is filled with an inert gas under pressure. A temperature change causes the internal pressure in the stem to change. The deflection of the Bourdon tube thus caused is transmitted to the pointer by a movement.

A version with rotatable (360°) and turntable case (90°) allow the thermometers to be aligned as desired under all installation conditions. In conjunction with a corresponding thermowell, these thermometers can also be used with aggressive media or high process-pressures.

Gas-actuated Thermometers Application

  • Chemical and petrochemical industry
  • Process engineering
  • Food industry

Technical Data

Measuring ranges

-200 … 50 °C to 0 … 700°C

Mounting
  • With Capillary
  • Without Capillary

 

 

Bimetal Thermometer

Bimetal thermometers use two strips of different metals to convert temperature into mechanical displacement. The different metals, often steel and copper or steel and brass, are joined together throughout their length and will expand at different rates as they are heated.

The difference in the expansion will cause the strip to bend one way if heated or the other if cooled. This movement correlates to the actual temperature and moves an indicator along the scale. The metal strips can be lengthened for sensitivity and are often coiled for compactness.

Bimetal thermometers are inexpensive, simple, and durable. As purely mechanical devices, they display only the current temperature on their dial. They can be accurate to about 1% full span. They are often used in food and beverage preparation, process temperature measurement, wastewater treatment, boiler systems, and other places.

Bimetal Thermometer Application

  • chemical
  • petrochemical
  • oil and gas
  • energy
  • water/wastewater industries
Diaphragm Pressure Gauge

Diaphragm Pressure Gauge

/0 Comments/in /by

Diaphragm Pressure Gauge

Diaphragm Pressure Gauge are preferably used for low-pressure ranges. Through the large working surface of the circular, corrugated diaphragm element, small pressure ranges can be measured reliably.

Diaphragm pressure gauges are considered as specialists in the process industries. They come into play when Bourdon tube pressure gauges reach the limits of their performance. One of the advantages of diaphragm pressure gauges is the measurement of low pressures.

It is suitable for all gaseous and liquid media, as well as for viscous media and suspended solids. When a force acts against a thinly stretched diaphragm, it causes a deflection of the diaphragm with its center, deflecting the most.

Applications of the diaphragm pressure gauge

  • For measuring points with increased overload
  • With liquid-filled case suitability for high dynamic pressure loads and vibrations
  • For gaseous, liquid and aggressive media, also in aggressive environments
  • With the open connecting flange option also for contaminated and viscous media

Industries:

  • Chemical
  • petrochemical
  • power plants
  • mining
  • on-/offshore
  • environmental technology
  • machine building
  • and general plant construction

Diaphragm pressure gauges are suitable for gauge, absolute and differential pressure. Their core, the diaphragm element, is a circular, corrugated diaphragm which is clamped or welded between two flanges. This element is generally manufactured from resilient steels such as stainless steel or Inconel. On pressure loading, the deflection of the pressure element, proportional to the incident pressure, is transferred to a movement via a link. (see Figure 1)

The usable diaphragm travel is as short as approximately one millimeter, which offers high repeatability. However, this characteristic is related to corresponding standards for quality and tolerances of the diaphragm materials.

In addition to the material itself, the material strength, waveform, and diameter determine the metrological characteristics of the diaphragm, and with this, the quality of the measuring result for the appropriate measuring range. Diaphragm elements basically possess a corrugated profile. A smooth metal diaphragm would deform plastically under loading and would, therefore, make a precise pressure measurement impossible.

Diaphragm Pressure Gauge

Diaphragm pressure gauges Advantages:

  • Excellent load performance
  • Linearity
  • Suitable for measuring absolute pressure, differential pressure
  • Small size, affordable
  • Can be used for viscous, slurry measurement.

Diaphragm pressure gauge Disadvantages:

  • Seismic, impact resistance is not good
  • Difficulty in maintenance
  • Lower measurement pressure