YX-160-B Explosion proof electric contact pressure gauge_Anhui Honglin Instrument Cable Co., Ltd.

YX-160-B Explosion proof electric contact pressure gauge

Yx-160-b explosion proof electric contact pressure gauge is composed of flameproof enclosure, measur…

Tel：+86-0550-7516689
Fax：0550-7513058
Mail：ahhl@ahhonglin.com

Description

Structural principle
Yx-160-b explosion proof electric contact pressure gauge is composed of flameproof enclosure, measuring system, electric contact group, regulating device and outlet box. The flameproof shell of the pressure gauge has good flame-proof performance. Therefore, the explosion-proof electric contact pressure gauge can withstand the explosion pressure produced by the explosive gas mixture inside the shell once it causes explosion, and can effectively prevent the heat energy generated from it from spreading smoothly, However, it can only spread out slowly along the small gap of the flameproof joint surface inside the shell. At this time, the instantaneous temperature transmitted to the outside of the shell has been reduced below the ignition point temperature of the explosive gas mixture, so it will not cause detonation propagation.
The working principle of the explosion-proof electric contact pressure gauge is based on the elastic deformation of the detecting element (spring tube in the measuring system), which drives the contact in the electric contact group to produce corresponding action (closing or breaking) through mechanical transmission, so as to make the circuit in the pressure control system connected or disconnected, so as to realize the purpose of automatic control alarm and on-site indication.

Main technical indicators
Accuracy level: 1.5
The scale range is 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；- 0.1～0.06；- 0.1～0.15；- 0.1～0.3；- 0.1～0.5；- 0.1~0.9；- 0.1～1.5；- 0.1～2.4MPa
Control mode: upper and lower limit slow travel contact switch
***High working voltage: DC 220 V or AC 380 V;
Contact power: 10va
Working position: vertical installation
The operating environmental conditions are: - 10 ~ 50 ℃, relative humidity is not more than 80%, and the explosive mixture should belong to class IIB and below T4 group. The working vibration and sharp pulsation of measured medium have no influence on the reliable action of instrument contact.
Temperature effect: the indication value is not more than 0.4% / 10 ℃, and the set point is not more than 0.6% / 10 ℃ (the use temperature deviates from 20 ± 5 ℃).
Insulation strength: 50 Hz sinusoidal alternating current 2000V, lasting for one minute
Weight: 6kg
·Types and basic parameters of flameproof joint surface

Shell volume V (L)	＞0.5
Joint surface type	plane	Cylinder (movable part)
Small effective length of flameproof joint surface LMM	fifteen
Screw through hole edge to flameproof joint surface * small effective length L1	eight
Large gap or diameter difference of flameproof joint surface	zero point one five
Surface roughness Ra of flameproof joint surface	three point two	one point six

Note: for examples of effective length and gap width of flameproof joint surface, please refer to structural diagram of flameproof enclosure.

·Flameproof enclosure and pressure conducting system and other parts and materials

Part name	Material brand or name	Part name	Material brand or name
Drive case cover Outlet box	ZL102 (or zl-102, zl-101)	Thin washer	L3
Drive case cover Outlet box	ZL102 (or zl-102, zl-101)	Joint	twenty
axle sleeve	QAJ9-2	Bourdon tube	3J53
Observation window	organic glass

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