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explosion- proof platinum resistor

Model：WZPK
Category：explosion- proof platinum resistor
origin：SHANGHAI

SHANGHAI AUTOMATION INSTRUMENTATION CO. LTD. NO. 11 AUTOMATION INSTRUMENTATION FACTORY Shanghai Yi Electric Actuator SHANGYI ELECTRIC ACTUATOR SHANGYI BRAND SHANGZIYI THEMOCOUPLE AND PRESSURE GAUGE explosion- proof platinum resistor

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WZPK explosion- proof platinum resistor

Industrial explosion-proof platinum resistor is a temperature sensor which is widely applied in industrial automatic control systems. It can switch the object’s temperature parameter into signals and passed to the display, recording and regulation instruments through temperature sensor. It is helpful to test, adjust and control the system.

Shanghai Automation Instrumentation Co., Ltd. production of explosion-proof thermal resistance is usually and display instruments, recording instruments and other supporting the use of. Direct measurement of the production site of hydrocarbons such as the explosion of 0 ~ 500 ℃ range of liquid, steam and gas medium and solid surface temperature.

Technical Parameters

Compression spring-type temperature sensing element, good anti-vibration performance;

High accuracy of measurement;

High mechanical strength, good pressure resistance;

Imported film resistive components, reliable and stable performance;

Explosion-proof grade: Exd Ⅱ CT4

Exd II CT6

ExiaCT4

ExiaCT6

Protection class IP65

Electrical outlet M20 × 1.5 1/2 "NPT

working principle

Explosion-proof thermal resistance using the principle of gap explosion-proof, designed with sufficient strength of the junction box and other components, all will produce

Sparks, arcs and dangerous temperature parts are sealed in the junction box cavity, when the cavity explosion, through the joint surface gap flame and cooling, so that after the explosion of the flame and the temperature can not pass outside the cavity, so the temperature The

SHANGHAI AUTOMATION INSTRUMENTATION CO. LTD.

NO. 11 AUTOMATION INSTRUMENTATION FACTORY

Shanghai Yi Electric Actuator

SHANGYI ELECTRIC ACTUATOR

SHANGYI BRAND

SHANGZIYI THEMOCOUPLE AND PRESSURE GAUGE

System composition

(1) thermal resistance temperature measurement system generally by the thermal resistance, connecting wires and display instruments and other components. Attention should be paid to the following two points:

① thermal resistance and display instrument must be the same degree of division

② In order to eliminate the influence of the change of the connecting wire resistance, it is necessary to adopt the three-wire connection method. See Chapter 3 of this chapter for details.

(2) armored thermal resistance armored thermal resistance by the temperature components (resistors), lead, insulation materials, stainless steel casing made of a solid body, its diameter is generally φ1 ~ φ8mm, the minimum up to φmm The Compared with the ordinary thermal resistance, it has the following advantages:

① small size, the internal air gap, thermal inertia, the measurement of small lag;

② good mechanical properties, vibration resistance, impact;

③ can be bent, easy to install

④ long service life

(3) end of the thermal resistance of the end of the thermal resistance of the temperature sensing element by the special treatment of the resistance wire around the system, close to the thermometer end. Compared with the general axial thermal resistance, it can more accurately and quickly reflect the measured end of the actual temperature, suitable for measuring the bearing pad and other parts of the end surface temperature.

(4) Flameproof thermal resistance Flameproof thermal resistance through a special structure of the junction box, the shell of the internal explosive gas mixture by the spark or arc isometric resistor circuit repair must change the length of the resistance wire and affect the resistance value, For the replacement of the new resistor as well, if the use of welding repair, after welding to be qualified before use.

Installation requirements

The installation of the thermal resistance of Shanghai Automation Instrumentation Co., Ltd. should pay attention to the accurate measurement of temperature, safe and easy maintenance and maintenance, and does not affect the operation and production of equipment to meet the above requirements, in the choice of thermal resistance of the installation site and Insert the depth to note the following points:

1, in order to make the thermal resistance of the measuring end and the measured medium between the full heat exchange, should be a reasonable choice of measuring point position, try to avoid the valve, elbow and pipe and equipment near the dead angle installed thermal resistance.

2, with a protective tube thermal resistance with heat transfer and heat loss, in order to reduce the measurement error, thermocouple and thermal resistance should have sufficient insertion depth:

(1) For measuring the thermal resistance of the central fluid temperature of the pipe, it is generally necessary to insert the measuring end into the center of the pipe (vertical installation

(1) For measuring the thermal resistance of the center of the pipe, it is generally necessary to insert the measuring end into the center of the pipe (vertical or inclined installation). If the pipe diameter of the fluid to be measured is 200 mm, the thermal resistance insertion depth Choose 100 mm;

(2) For high temperature and high pressure and high temperature fluid temperature measurement (such as the main steam temperature), in order to reduce the protective sleeve on the resistance of the fluid and prevent the protective sleeve in the fluid under the action of the fracture, you can take protection tube shallow plug or use Type thermal resistance. The shallow plug-in thermal resistance protection sleeve, the depth of the main steam pipe inserted should be not less than 75mm; the standard insertion depth of the thermal sleeve thermal resistance is 100mm;

(3) If you need to measure the temperature of the flue gas flue, although the flue diameter of 4m, thermal resistance can be inserted into the depth of 1 m.

(4) When measuring the original insertion depth of more than 1m, should be installed as far as possible vertical, or the installation of support and protective casing.