Selection of material for the pump head of a high-pressure cleaning machine
The main materials of the high-pressure cleaning machine pump head (waterway main and cylinder) are three categories: brass, stainless steel, and aluminum alloy. The cylinder is mainly ceramic / spray ceramic, and the differences are obvious at the domestic, commercial, and industrial levels.
I. Material of the main pump head (cylinder / waterway)
Brass (Copper Alloy) - Mainstay for Home / Commercial
Composition: Copper and zinc alloy, often nickel plated to prevent rust.
Features: high value for money, corrosion resistant, easy to casting, good sealing; Withstand pressure of about 100-200 bar, suitable for cold water / ordinary cleanser.
Applicable: Car wash for home, commercial car wash machine, sanitation (Greenfield, Black Cat, Kahl family).
Brass pump head for high pressure cleaning machine
Stainless Steel (30 / 316 / dual-phase steel) - Industrial / Corrosion Resistant Scenes
Ingredients: 316L (molybdenum), 2205 duplex steel, etc.
Characteristics: resistant to strong acids and alkalis, resistant to high temperatures (up to 150 ° C), and resistant to corrosion of seawater;Withstand voltage 200-500 bar, long life.
Suitable for: industrial rust removal, chemical cleaning, seawater / chlorine environment, hot water machine type.
Aluminum alloy - Low end home / portable
Features: light and cheap;But not corrosion resistance, easy to wear, low pressure (≤ 100 bar), short life.
Suitable: Entry-level household, temporary use, not suitable for commercial / long-term work.
Aluminum pump head for high pressure cleaning machine
II. Material of the pistons (core moving parts)
Ceramic Pillars (Aluminum Oxide / Zirconia Oxide) - High-end Commercial / Industrial Standard
Features: high hardness (HV1200 +), wear resistance, corrosion resistance, high temperature resistance; Life of up to 3000-10000 hours, suitable for high pressure within 800 bar.
Applicable: Industrial grade, commercial machine, water heater, corrosion resistant scenario.
Ceramic bracket (stainless steel substrate + ceramic coating) - mid-range commercial
Features: Cost is lower than pure ceramic, and wear resistance is better; However, the coating is easy to fall off and is not resistant to dry rotation / strong corrosion.
Applicable: 200-300 bar commercial machines, high-end home machines.
Stainless Steel Pillars - Low End / Older Model
Characteristics: low hardness, easy wear, short life;Only for low pressure (≤ 150 bar) water chillers.
III. A brief overview of material selection
Domestic car wash (≤ 150 bar): brass pump head + spray porcelain plunger (cost-effective).
Commercial car wash / sanitation (150-250 bar): nickel-plated brass + ceramic plunger (durable and resistant).
Industrial / chemical / hot water (200-500 bar): 316 stainless steel + ceramic plunger (corrosion resistance and high temperature).
Seawater / Strong corrosion: dual-phase stainless steel (2,507 + ceramic studs).
IV. Common Misconceptions
❌Pure copper = whole copper: mostly brass (copper-zinc alloy), non-purple copper;Copper is too soft to be suitable for high pressure.
❌Stainless steel must be better: ordinary scenes of brass are enough, cheaper and better sealed; Stainless steel has advantages only in corrosion / high temperature scenarios.
❌Ceramic cylinders will not break: dry rotation and empty rotation are strictly forbidden, otherwise they are easily cracked; Preheating for alternating use of hot and cold water.