18D series pressure controllerDetailed product description：

18D series pressure controller

The controller adopts two forms of sensors: diaphragm sensors and leak free piston sensors. D500/18D diaphragm sensors can be used for neutral gases such as air and gas, as well as liquid media such as lubricating oil and light fuel. The set value of the controller is adjustable, with a range of -0.1... 1.6MPa.
D505/18D leak free piston type sensors can be used for neutral lubricating media such as hydraulic oil, lubricating oil, and light fuel. The set value of the controller can be adjusted within the range of 0.5-25MPa.
Process of action of single pole double throw micro switch:
Terminal 1-3
Connect when the pressure rises to the upper switching value
Terminal 1-2
Disconnect when the pressure rises to the switching value

Main technical performance
Working viscosity:<1 × 10-3m2/s
Switching element: Micro switch
Environmental temperature: -25~55 ℃
Medium temperature: -25~80 ℃
Shell protection level: IP54 (compliant with DIN40050, equivalent to IP54 in GB4208)
Installation position: The pressure interface is vertically downward (allowing for a tilt of 15 °)
Anti vibration performance: Max: 100m/s2
Repetitive error: ≤ 2.5%
Contact capacity: AC 220V 6A (resistive)
(If there are special requirements, please refer to the application manual introduction prepared by our factory)

characteristic
The 18D series pressure controller is an ultra small device that allows for high switching frequencies (100 times/minute) and excellent vibration resistance.

specification
Switching difference is not adjustable

model	Set value adjustment scope MPa	Switching difference not greater than		Maximum allowable pressure** MPa	pressure sensor material			interface type **	Within the interface thread	weight kg	Overall dimensions Drawing number
		Set value range MPa	Set value range MPa		shell	secret seal circle
D500/18D Diaphragm pressure Controller	-0.1……0 -0.1……0 0.02……0.2 0.02……0.2 0.05……0.8 0.05……0.8 0.1……1.6 0.1……1.6	zero point zero one five zero point zero one five zero point zero two zero point zero two zero point zero four zero point zero four zero point zero six zero point zero six	zero point zero two zero point zero two zero point zero four zero point zero four zero point one three zero point one three zero point two four zero point two four	eight eight eight eight eight eight eight eight	AL AL AL AL AL AL AL AL	Nitrile rubber		I P I P I P I P	G1/4" — G1/4 —" G1/4" — G1/4" —	zero point two	01 03 01 03 01 03 02 03
D505/18D Piston type pressure Controller	0.5……7 0.5……7 1……16 1……16 2.5……25 2.5……25 4……40 4……40	zero point eight zero point eight one point two one point two one point five one point five one point eight one point eight	two two three point five three point five four four four point five four point five	forty forty forty forty forty forty sixty sixty	AL AL AL AL AL AL AL AL	Nitrile rubber	steel	I P I P I P I P	G1/4" — G1/4 —" G1/4" — G1/4" —	zero point two	04 03 04 03 05 03 05 03

Note: *) In practical work, even brief pressure peaks should not exceed this value.
**I - Interface is internal thread P - Interface is flange.

Adjustment of Setting Values
The steps for adjusting the set value of the controller with non adjustable switching difference are illustrated as follows
[Example]: Select the controller with order number 0882200 and request to reduce the pressure to 8MPa (lower switching value) to send a contact signal. The operation steps are as follows:
Screw the product into the threaded port of the hydraulic pressure calibration table (if the controller is a flange interface, it should be connected to the flange of the pressure calibration table), apply pressure to the product for 2 minutes according to the actual working pressure, and then proceed with the setting.
Connect the cable wires to the plug, and connect the other end of the cable to a multimeter.
Add pressure to 8MPa (this value can be read from a standard pressure gauge).
Loosen the locking screw, use a 5mm hex socket wrench, and turn the set value adjustment screw clockwise to adjust the hexagonal groove of the threaded part, so that the set value changes from small to large, until the switch contact switches at 8MPa.
Tighten the locking screw, adjust the pressure of the calibration table to fluctuate back and forth around 8MPa, and check whether the switching value of the contact point is 8MPa when the pressure drops. This value is the lower switching value to be set. The corresponding upper switching value should be 8MPa plus a switching difference of 2.3MPa (about), which is 10.3MPa (about).