J120-452-M201UE防爆真空压力开关（J120-452-M201 UE explosion-proof vacuum pressure switch ）

J120-452-M201 UE explosion-proof vacuum pressure switch Model: J120-452-M201   Range: 30"HgVac-20psi -1-1.4barWetted material: Nitrile rubber diaphragm and O-ring 1/4NPT inner wire aluminum pressure Interface and cover  dead zone/hysteresis: 0.1-4"Hg 3.4-13.5mbar zui Maximum pressure: 80"wc 1.4bar pressure resistance 225PSI/15.5bar Explosion-proof pressure switch working principle  Explosion-proof pressure switch is through a strong sealed shell Enclose the wiring contacts in a solid space to achieve the flameproof effect. The working principle of the explosion-proof pressure switch is that the pure mechanical deformation causes the micro switch to act. When the pressure increases, it acts on different sensing pressure components (diaphragm, bellows , Piston) produce deformation, will move upward, through the mechanical structure such as railing spring, finally start the micro switch on the upper end, so that the electrical signal is output, the setting method is divided into continuous displacement type and force balance type from the functional principle. Explosion-proof pressure switch According to the principle, it can be divided into mechanical explosion-proof pressure switch and electronic explosion-proof pressure switch. The mechanical type is divided into ordinary and sealed type.  Technical parameters of explosion-proof pressure switch Measuring medium: non-corrosive gas or liquid to nitrile rubber or 316L stainless steelHousing: Die-cast aluminum, epoxy-coated, cover with sealing gasketHousing Rating: Meets NEMA 4X requirementsSetpoint Accuracy: ±1%Switching Difference: Adjustable and non-adjustable (refer to selection table data)Repeatability error: <1%Pressure interface: standard 1/2NPTF internal thread; can be customized according to site needsElectrical interface: 3/4″NPTF thread interface can be customized according to site needsSwitch output: a single-pole double-throw (SPDT) output; 100% can be set separately within the adjustment range; the switch can be connected to "normally open" or "normally closed" Accuracy: the value indicating the accuracy 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.   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 Copper Plated Brass-Brown N-Brown 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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