Full explanation of pressure cleaning functions
Full explanation of pressure cleaning functions
I. What does pressure do?
Pressing = adjusting the outflow pressure, and the core is to match different cleaning scenarios, taking into account the cleaning effect, equipment protection, water saving, electricity saving, and not injuring the object.
Pressure units commonly used: bar (bar), MPa (mpa), 1MPa = 10bar.
II. Classification of Mainstream pressure structures
1. Manual pressure on pump head (mainstream piston pumps, commercial / industrial machines)
Structure: High pressure pump outside pressure valve + pressure reflow pipe
How to adjust: rotate the pressure knob, increase the pressure by clockwise and decrease the pressure by counterclockwise
How it works:
The knob tightens the spring → holds the pressure escape valve core, the flow gap becomes smaller, the excess water flow is less, and the system pressure increases;
When the spring is loosened, the return circulation path becomes bigger, a large amount of water flows back into the mouth, and the output pressure decreases.
Advantages: The pressure regulation range is large, the steady pressure is stable, and it is suitable for car wash, construction site, plumbing cleaning, sand spraying.
Complementary protection: There is a self-contained overflow safety valve, and the pressure exceeds the maximum automatically drains, protecting the pump body.
2. Gun handle pressure switch (domestic portable cleaning machine)
There are two forms:
The gun body rotating pressure ring: three levels of low / medium / high pressure;
The gunhead can change nozzle pressure: 0 ° high pressure point spray, 25 ° fan washing, 40 ° low pressure soft washing, soap liquid low pressure mode.
Principles: Changing the outlet pore and the diffusion angle of the water indirectly changes the impact pressure, without changing the internal pressure of the pump.
Cons: The pressure range is limited, and the pressure in heavy duty industrial scenarios is inadequate.
3. Electric levelless pressure (high-end commercial, fully automatic cleaning equipment)
Electric control knobs / panel adjustment, motor frequency change + electronic pressure sensing, automatic matching pressure, constant pressure output, no manual wrenching, suitable for assembly line and automatic cleaning platforms.
4. Automatic downtime co-pressure (standard for home)
Pulling a gun out of water builds pressure; The gun is loosened, the pressure valve automatically releases pressure back into flow, and the pump is empty at low pressure standby to reduce wear.
III. Applicable scenarios for different pressure levels
Low pressure (10-30 bar)
Foam generation, pre-washing of cars, cleaning of windows, doors, plastic furniture, electric vehicle shells, and watering of plants and flowers. No damage to paint surfaces or brittle surfaces.
Medium voltage (40-80 bar)
The body mainly washes, floor tiles, balcony, courtyard wall, air conditioning external machine, and general stages of daily cleaning.
High pressure (100 - 200 bar)
Engineering vehicles, cement stains, moss, oily ground, piping loosening, rust removal of steel structures; Direct polishing of car paint, glass, seals is prohibited.
Ultra-high pressure (industrial machines above 200 bar)
Ship paint removal, concrete lamination, and high-pressure water jet cleaning of pipes require professional protection.
IV. Correct operating steps for pressuring
The pressure valve is adjusted to low pressure before starting the machine, and empty load is started to avoid causing damage to the crankshaft syringe.
After the water is normal, slowly rotate the pressure knob to increase the pressure, and do not screw it to the maximum at once;
Adjust the pressure according to the cleaning object, preferably low pressure for soft objects;
Before shutting down, drain the pressure first, raise it to low pressure, release the pressure of the pipeline, and shut down the machine.
V. Common faults and causes of pressure compression
The pressure cannot be adjusted, and the pressure is always low
Pressure spring fatigue, valve core tartar stuck;
Insufficient water flow and blocked filtering;
The overflow valve sealing pads are broken and continue to leak pressure.
The pressure is high and low and unsteady
The inlet leaks, the inlet pipe is bent;
The pressure valve core is worn and there is air in the waterway;
The cylinder seal leaks water and leaks.
The pressure should not be lowered, always high pressure.
The pressure valve backflow hole is blocked by dirt and cannot return the water pressure;
The valve core is stuck in the closed position.
There is a lot of noise and vibration when pressure is applied
The pressure is adjusted too quickly and the system is corrosion, and slow tweaking can alleviate it.
VI. CAUSES OF PRESSURE USE
Long-term full load operation is prohibited, and continuous reflow of high pressure will quickly heat up and damage the pump oil seal.
The use of 0 ° direct exposure high pressure nozzles is strictly prohibited for the cleaning of paint, aluminum alloy and plastic parts;
In areas with poor water quality, the pressure valve is removed regularly to clean the water dirt and prevent the valve core from stuck.
The industrial piston pump pressure valve should not be violently screwed, and the screw washer will permanently lose pressure function.
During winter downtime, the internal water of the air conditioning pressure valve needs to be discharged to prevent freezing of the valve body.