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Explosion-proof Fixed Flange Thermoresistor
- Product Description
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Explosion-proof Flanged Thermoresistance
1. Overview of Explosion-proof Flanged Thermoresistances
Explosion-proof thermoresistances are typically used in conjunction with display instruments and recording devices. They directly measure the temperature of liquid, vapor, gas media, and solid surfaces within the range of 0–500°C, where hydrocarbons and other explosive substances may be present at production sites.
2. Working Principle of Explosion-proof Flanged Thermoresistances
Explosion-proof thermal resistors are designed based on the principle of gap‑type explosion protection, incorporating components such as junction boxes with sufficient mechanical strength. All parts that could generate sparks, arcs, or hazardous temperatures are sealed within the junction box cavity. When an explosion occurs inside the cavity, the flame and heat are extinguished and cooled by the gap at the joint surface, preventing the propagation of the explosion beyond the enclosure, thereby achieving explosion isolation.
3. Features of Explosion-Proof Flanged Thermoresistors
Spring-loaded temperature-sensing element with excellent vibration resistance;
High measurement accuracy;
No need for compensation leads, saving costs;
Imported thin-film resistor elements, ensuring reliable and stable performance.4. Selection Table for Explosion-Proof Flanged Thermoresistors
Product Model
Temperature Scale
Temperature Range (°C)
Thermal Response Time
Explosion-proof rating
Specifications (mm)
d
L x l
WZP-440
WZP2-440
Pt100
-200—500
<90S
d||BT4
d||CT5
d||CT6
ia||CT6
φ16
300x150
350x200
400x250
450x300
500x350
550x400
650x500
900x750
1150x1000
1650x1500
2150x2000
WZP-440G
WZP2-440G
<24S
WZP-441
WZP2-441
<45S
φ12
WZP-441G
WZP2-441G
<24S
WZC-440
WZC-440G
Cu50
Cu100
-50—100
<120S
φ16
<90S
WZC-441
WZC-441G
<120S
φ12
<90S
① Class A thermal resistors and Class I thermocouples must be ordered according to the agreement;
② Unless otherwise specified, the temperature measurement range and protective sheath material shall be assumed to be 1Cr18Ni9Ti;
③ Other relevant technical parameters can be customized based on user requirements, such as length, connection type, single‑element or dual‑element configuration, etc.
FAQ – Frequently Asked Questions:
Q1: Why choose a fixed flange mounting?
Compared to threaded mounting, flanged mounting is more robust, provides better sealing, and offers higher pressure resistance, making it suitable for large vessels, reactors, and pipelines subject to significant vibration. Additionally, flanged connections are easy to disassemble, facilitating maintenance and sensor replacement.
Q2: Can the flange specifications of explosion-proof fixed-flange thermoresistances be customized?
Yes. We support mainstream flange standards both domestically and internationally, including HG/T 20592 (Ministry of Chemical Industry standard), GB/T 9119 (Chinese national standard), ANSI B16.5 (American standard), JIS (Japanese standard), and others. Flange sizes (DN15–DN80), pressure ratings (PN6–PN64), and sealing face types (RF, MFM, FF) can all be customized as required.
Q3: What media are explosion-proof fixed-flange thermocouples suitable for?
It is suitable for temperature measurement of liquids, gases, steam, and other media; the sheath material can be selected according to the corrosivity of the medium: 304 stainless steel is used for general applications, while 316L or 2205 duplex stainless steel is recommended for corrosive media.
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