What’s the difference between plungers made of different materials?

We keep improving and developing the most advanced coating technologies so as to impressively increase durability.

Our standard surface coatings include widely used AMS 4775 alloy coating, Colmonoy coating, ceramic coating, and tungsten carbide coating.

• Nickel-based alloy coated fluid end plunger
  This is the standard and the most popular type required by the customers and Dawopu is also using this type in its own fluid ends. The composition is equivalent to METCO 15 or Colmonoy 88, HRC60. It works with improved wear and corrosion resistance.

• Tungsten Carbide plungers
  Dawopu mainly sells to the US and Russia for this type. Hardness can reach up to HRC68-70. Tungsten carbide coating reduces wear from wear however it is not specifically corrosion resistant.

• Hard chrome plungers
  When hard chrome is applied on the plunger, coating thickness/ depth can be done at Max. 0.3mm/ 0.0118in. If it ever goes up, the coated layer can be easily peeled off. This hardening and protective coating on the base material often works for pumping fluids without much lubrication.

• Ceramic plungers
  Dawopu makes fully ceramic plungers with Sicer- 315 and 317, Ceramic is abrasive resistance. However, once there is a broken pc during pumping, it is definitely not a good experience to clear them up.