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| Radial Gauge |
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Gauge structural principle
Gauge composed of pressure systems (including joint, spring tube, limiting screws, etc.), gear transmission, indicator device (pointer and dial) and housing (including Case, table covers, table glass, etc.) formed. Gas-tight shell structure, can effectively protect the internal parts from environmental impacts and contamination intrusion. For liquid-filled enclosure (typically silicone oil or glycerine) instrument, capable Anti-vibration environment than drama and media pressure pulsation reduction effect.
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| Detailed description |
A pressure gauge features
● Stainless steel design, strong corrosion resistance
● High pressure measurements to 100MPa
● Safety baffle means, back pressure relief
● Safety double glass protection
● Accuracy ± 1.0% ± 1.6%
Second, the classification of gauge
A pressure gauge their measurement accuracy can be divided into precision pressure gauges, general pressure gauge. Precision pressure gauge measurement accuracy class were 0.1,0.16,0.25,0.4 grade 0.05; general level gauge measurement accuracy were 1.0,1.6,2.5,4.0 level.
2, the pressure gauge at the direction of the benchmark, divided into general pressure gauge, absolute pressure gauge stainless steel pressure gauge, differential pressure gauge. General gauge to atmospheric pressure as a reference; absolute pressure absolute pressure gauge to zero as the base; differential pressure gauge measuring the difference between the two measured pressure.
3, pressure gauge their measuring range is divided into vacuum gauge, pressure vacuum gauge, micro-pressure tables, low tables, medium and high pressure gauge pressure gauge. Vacuum gauge for measuring pressure less than atmospheric pressure; pressure vacuum gauge used to measure atmospheric pressure is less than and greater than the pressure value; micro pressure gauge used to measure the pressure value is less than 60000 Pa; pressure gauge used to measure the pressure value 0 ~ 6MPa ; the pressure gauge used to measure 10 ~ 60MPa pressure; pressure gauge used to measure pressure above 100MPa.
4, the pressure gauge their show points: pointer pressure gauge, digital pressure gauge
5, pressure gauge made of sealed housing structure, and the housing is filled damping oil (now mostly filled with silicone oil), because of its damping effect can be used in the work environment vibration or medium pressure (load) Pulse measurement sites.
6, electrical contact with the control switch can be realized sender gauge alarm or control functions.
7, a pressure gauge with remote mechanism in industrial engineering can provide the required electrical signal (eg standard DC resistance of the signal or current signal).
8, divide the table used by the isolator (chemical seal) through the diaphragm, the measured medium and instrument isolation, in order to measure strong corrosion, high temperature, easy to crystallize media pressure.
9, the elastic member gauge the elastic mechanical gauges with the pressure sensitive element changes due to elastic deformation. Mechanical pressure gauge with Bourdon tube (Bourdon tube), diaphragm, diaphragm and bellows, and other sensitive components and classified accordingly. Sensitive element is generally made of copper alloy, stainless steel or made of special materials.
10 spring tube (Bourdon tube) into C-type tubes, coil spring tube, spiral and other patterns. Generally use the cold-curing material blank tube in the annealed state has a high plasticity, work hardening by pressure processing and qualitative treatment to obtain a high elasticity and strength. Bourdon tube pressure of the cavity, the use of it has elastic properties, the pressure can easily be converted to the free end of the spring tube elastic displacement. Bourdon tube measuring range is generally 0.1MPa ~ 250MPa.
Third, the gauge theory
A sensitive pressure gauge by the table element (Bourdon tube, diaphragm, bellows) of elastic deformation, then the table movement conversion mechanism of the pressure transmission to the index strain, causing rotation pointer to display the pressure.
Overflow hole:
Bourdon tube burst event of an emergency situation when the internal pressure will be released to the outside world through the overflow hole to prevent the glass panel burst. Note: To maintain proper performance of the overflow hole, leaving behind in the table at least 10mm of space, do not modify or plug the overflow hole.
Pointer:
In addition to standard pointer, the other pointer is also optional. (Zero adjust or set the pointer pointer pointer max) are listed in the selection table.
Glass panel:
In addition to standard glass, other special materials glass, such as tempered glass, non-reflective glass is also optional.
Performance Category:
Ordinary type (standard), steam with the ordinary type (M), heat-resistant (H), resistance to vibration type (V), steam-resistant modes (MV) heat-resistant and vibration mode (HV).
Disposition:
Oil / water to remove residual in the manufacture of wetted parts in water or oil.
Exterior specify:
In addition to the standard color color outside the casing, please indicate.
Throttle: (optional)
To reduce the pulsating pressure, throttle valve installed in the pressure at the entrance.
Pulsating pressure:
Since the pump pulse generator characteristics, so the gauge special clinic curve larger amplitude. This is very harmful to the gauge.
Connection:
The product has three connections connecting part:
Copper-based brazing material ... for the connection
Silver-copper brazing ... for copper and stainless steel type material connection between
TIG welding of stainless steel for the connection between ...
Fourth, the gauge term
Pressure There are two representations: one is the absolute vacuum pressure expressed as a benchmark, called the absolute pressure; another one is represented by the atmospheric pressure as the reference pressure, called the relative pressure. Since most pressure measured by the pressure meter is relative, the relative pressure, also known as the gauge pressure. When the absolute pressure is less than atmospheric pressure, the container can be less than one atmosphere absolute pressure value to represent. Known as "vacuum level." Their relationship is as follows:
Absolute pressure = atmospheric pressure + relative pressure
Vacuum = atmospheric pressure - absolute pressure |
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