PD-H-L Pressure relayDetailed product description：

PD-H-L pressure relay is a converter in the electro-hydraulic system that converts pressure signals into electrical signals to achieve automatic program control and safety protection of the electro-hydraulic system. Suitable for general environmental working media such as oil, gas, water, etc., the instrument pressure switching is adjustable, the response is sensitive, and there is a light display. Its technical indicators comply with the JB/JQ2020-88 standard for hydraulic pressure relay product quality classification.  
The PD-H-L pressure relay has obtained a utility model patent with patent number 91-65222. This product is widely used in automatic control and safety protection in machinery, metallurgy, mining, petroleum, chemical industry, and other fields.  

Model name:



Technical parameters of PD-H-L pressure relay:

pressure regulation range MPa	Minimum on/off pressure MPa	Maximum on/off pressure (MPa)	Sensitivity%	Repetition accuracy%	Switch accuracy%	Maximum allowable switching frequency times/minute
0-1.0	0.065; zero point zero zero five	1.0; zero point nine seven	≤3	≤1.2	<1	thirty
1-32	0.7; 0	32;31	≤2	≤0.5

Working temperature: -25 ℃~70 ℃
Working medium viscosity: 2.8~380 cst
Protection level: IP54
Working voltage: 24V -; 110V -; 220V~ 
Switch lifespan: 300000 cycles
Connection thread: M14 × 1.5
Instrument execution standard: JB/T6802-1993

External dimensions:



PD-H-L pressure relay wiring diagram:



Usage and ordering instructions:

Pressure regulation method:
When adjusting the PD-H-L1 type, the locking nut should be loosened counterclockwise first, and the pressure regulating screw should be rotated clockwise to increase the pressure to the given value displayed on the pressure gauge. Then, the pressure regulating screw should be rotated counterclockwise to activate the micro switch. The indicator light is on, gently tighten the lock nut, repeat fine adjustment until the signal is correct, and lock the lock nut.

The PD-H-L2 pressure regulating method is the same as above. The upper limit regulating screw is located near the label, and the lower limit should be adjusted first, followed by the upper limit.
The working environment should not contain corrosive gases.
Please specify the name, model, voltage regulation range, and working power supply when placing an order.