J120-554-M201UE防爆压力开关焦炉煤气专用开关（J120-554-M201 UE explosion-proof pressure switch special switch for coke oven gas ）

Model parameters: J120-554 5.5-210KPa 55.2mbar-2.1bar Teflon wetted material fluorine rubber O-ring pressure interface 1/4NPTF stainless steel electrical interface 3/4NPTF pressure 1.55MPa explosion-proof pressure switch working principle  explosion-proof pressure switch The explosion-proof effect is achieved by sealing the wiring contacts in a solid space through a strong sealed shell. The working principle of the explosion-proof pressure switch is that the pure mechanical deformation causes the action of the micro switch. When the pressure increases, the different sensing pressure components (diaphragm, bellows, piston) will be deformed and will move upward, and finally activate the micro switch on the upper end through the mechanical structure such as the railing spring to output the electrical signal. The setting method is further divided into continuous displacement type and force balance type from the functional principle. Explosion-proof pressure switches can be divided into mechanical explosion-proof pressure switches and electronic explosion-proof pressure switches according to the principle, and mechanical types are divided into ordinary and sealed types. Accuracy: A value indicating the degree of precision of the device, including linearity, tolerance, hysteresis, repeatability, etc. At present, the highest precision of Nagano's pressure switch can reach ±0.5%FS, and the model is CB33. Maximum pressure (Max.P): the maximum value of the pressure range. Full Scale (FS): The difference between the maximum and minimum values ​​of the pressure range. Connection difference (dead zone): It refers to the difference between the switch setting action value and the reset value. For example, when the set value is 1MPa and the actual reset value is 0.9MPa, the connection difference is 0.1MPa. Working temperature: refers to the temperature range in which the internal mechanism and sensitive components of the instrument will not undergo continuous deformation during operation. Generally, the recommended operating temperature range of the pressure switch is -5~400C. If the temperature of the medium is too high, it can be considered to add an accessory siphon (filling shape) to achieve the purpose of cooling. SPDT (Single Pole Double Throw): Consists of a normally open, a normally closed contact and a common terminal. DPDT (Double Pole Double Throw): It consists of a symmetrical left and right common terminal, and two sets of normally open and normally closed terminals.Upper limit one contact (normally open): When the pressure rises to the set value, the contact will act and the circuit will be turned on. Lower limit one contact (normally closed): When the pressure drops to the set value, the contact will act and the circuit will be turned on. 0140 Gold contact M201 Factory setting, need to specify rising or falling setting M277 KPa or MPa is used as the pressure range unit on the nameplate, factory choice. Not applicable to temperature switch M278 The nameplate uses kg/cm2 as the pressure unit, not applicable to temperature switch M405 Conforms to European ATEX intrinsic safety standard M406 Conforms to Russian Gosgortechnadzor flameproof intrinsic safety standard M421 Flameproof junction box, only suitable for Russian flameproof standard M423 Flameproof junction boxes according to ATEX Serial number-model set point adjustable range dead zone maximum overpressure range withstand pressure pressure port wetted material J120-152 0.1 to 3.4 bar 6.9 to 34.5 mbar 3.4 bar 5.2 bar 1/4" NPTF  Ni Plated Brass-Brass J120-172 0.1 to 3.4 bar 6.9 mbar to 0.1 bar 34.5 bar 68.9 bar 1/2" NPTF 316L st/st J120-184 0.1 to 3.4 bar 20.7 mbar to 0.2 bar 34.5 bar 68.9 bar 1/2" NPTF 316 st/st-316L st/st-Viton J120-484 0.1 to 3.4 bar 20.7 mbar to 0.2 bar 34.5 bar 68.9 bar 1/2" NPTF 316 st/st-316L st/st-Viton J120-S152B 0.1 to 3.4 bar 6.9 to 34.5 mbar 3.4 bar 5.2 bar 1/2" NPTF 316L st/st J120-156 0.1 to 6.9 bar 13.8 to 41.4 mbar 6.9 bar 8.6 bar 1/4" NPTF Ni Plated Brass-Brass J120-173 0.3 to 6.9 bar 6.9 mbar to 0.2 bar 34.5 bar 68.9 bar 1/2" NPTF 316L st/st J120-185 0.3 to 6.9 bar 34.5 mbar to 0.4 bar 34.5 bar 68.9 bar 1/2" NPTF 316 st/st-316L st/st-Viton J120-191 0.7 to 6.9 bar 0.1 to 0.6 bar 103.4 bar 172.4 bar 1/2" NPTF 316 st/st J120-356 1.0 to 6.9 bar 48.3 mbar to 0.1 bar 6.9 bar 55.2 bar 1/4" NPTF 316L st/st J120-485 0.3 to 6.9 bar 34.5 mbar to 0.4 bar 34.5 bar 68.9 bar 1/2" NPTF 316 st/st-316L st/st-Viton J120-491 0.7 to 6.9 bar 0.1 to 0.6 bar 103.4 bar 172.4 bar 1/2" NPTF 316 st/st J120-555 0.1 to 6.9 bar 13.8 to 27.6 mbar 6.9 bar 15.5 bar 1/4" NPTF 316L st/st-Teflon-Viton J120-566 0.7 to 6.9 bar 0.1 to 0.8 bar 68.9 bar 103.4 bar 1.5" Sanitary 316L st/st J120-702 0.2 to 6.9 bar 0.1 to 0.3 bar 34.5 bar 68.9 bar 1/4" NPTF Ni Plated Brass-Buna N-Buna N J120-S156B 0.1 to 6.9 bar 13.8 to 41.4 mbar 6.9 bar 8.6 bar 1/2" NPTF 316L st/st J120-15835 0.3 to 6.9 bar 0.2 to 0.6 bar (ADJ) 34.5 bar 68.9 bar 1/4" NPTF Ni Plated Brass-Buna N-Buna N J120-164 0.3 to 13.8 bar 13.8 mbar to 0.1 bar 13.8 bar 13.8 bar 1/4" NPTF Ni Plated Brass-Brass J120-174 0.6 to 13.8 bar 6.9 mbar to 0.2 bar 34.5 bar 68.9 bar 1/2" NPTF 316L st/st 

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