Double Seal Plunger Pumps

Typical applications for double seal plunger pumps include methanol and corrosion inhibitor injection. Our pumps require either the TR-1 or TR-2 Timer/Relay in order to function. In the event that the pumps will be used within a SCADA system, a timer is not required.


  • The plunger is made of hardened 17-4 PH stainless steel. A protective coat of titanium nitride adds superior abrasion resistance and chemical compatibility for a longer service life.
  • Hand tightened lock ring provides easy access to plunger and seal.
  • The spring is made of Inconel and coated with Teflon for an extended service life.
  • The plunger is separate from the air piston and can be replaced independently at one-third the cost of replacing both.
  • Special cut-resistant ceramic check valve balls have a longer service life than standard stainless steel balls.


  • All stainless steel construction.
  • Double seal (DS).
  • Wide selection of seal materials to ensure chemical compatibility.

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