Corken PT Series PT25 2 1/2 in. NPT Cast Iron Sliding Vane Pump

2 1/2 in.
159 GPM
87.00 LBS
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Corken's PT Series is a special type of rotary positive displacement pump, known as a sliding vane pump. Sliding vane pumps have many of the positive displacement advantages of the gear pump, plus the ability to compensate for wear, and operate at a lower noise level. The PT25 has 2 1/2 in. NPT connections and is suited for transporting gasoline, diesel, fuel oil, and other petroleum products. The flow rates are perfect for home, farm, and fleet fueling applications.

Other configurations available. Please call 1-800-333-3331 for other options such as strainer, nitrile rubber seals or valve settings.

Note: The PT Series is dimensionally interchangeable with Blackmer pumps.


  • Installation is simple since the PT-Series pumps are dimensionally interchangeable with the competition
  • O-ring design delivers maximum sealing capability and is available with optional seal materials
  • Corrosion resistant bypass valve made of nickel plated cast iron
  • Available with a standard bypass valve or an optional air operated valve (AOV) for high and low flow control
  • Additionally, the AOV relieves the pressure in the lines for easier handling of the hose nozzle
  • Reliable mechanical seal design with optional seal materials
  • Heavy duty ball bearings provide greater durability and strength
  • Hollow rotor helps reduce weight
  • Available with a T-style strainer that keeps your pumping system free from damage caused by welding slag and foreign materials left in the piping or tank
  • Conveniently located drain plug allows you to empty the pump quickly when necessary
  • Positive displacement sliding vane design delivers higher pumping efficiency and a lower noise level
  • The self adjusting vanes extend the life of the pump by compensating for wear
  • Viton® elastomers ensure compatibility with a wider range of fluids such as biodiesel and ethanol blends


  • Model: PT25
  • Size: 2 1/2 in. NPT
  • Flow Rate: 159 GPM (602 LPM)
  • Pump Speed: 780 RPM
  • Viscosity: 20,000 SSU (4,250 cP)
  • Differential Pressure: 125 PSI (8.6 bar)
  • Working Pressure: 200 PSI (13.8 bar)
  • Maximum Temperature: 300°F (149°C)
  • Case/Head/Flanges Material: Cast Iron ASTM A48
  • Rotor: Ductile Iron ASTM A536
  • Bearing Cap: Steel
  • Bearings: Ball (Single Row), Grease Lubricated to 300°F (149°C) Max.
  • Vanes: Full size with 316 SS Wear Plate
  • Bypass Valve: Cast Iron ASTM A48 Electroless Nickel Plated
  • Bypass/AOV Cap & Valve Cover: Cast Iron A48
  • Bypass Valve Spring: Plated Steel
  • Bypass Valve Spring Ranges: 35 - 125 PSI (2.4 - 8.6 bar)
  • Seal Seat: Cast Iron
  • Seal Metal Parts: Steel
  • Shaft: Double Ended Keyed Shaft, High Strength Steel
  • O-Ring: Viton® to 300°F (149°C)
  • Gaskets: Composition to 500°F (260°C)
  • Vane Drivers: Case Hardened Steel
  • Gage Ports: 1/4 in. NPT
  • Compatible Fluids: Petrochemicals, Gasoline, Biofuels, Ethanol, Solvents


  • Fuel Oil Deliveries
  • Fleet Refueling
  • Lube Oil Deliveries
  • Aviation Refuelers
  • Bulk Transfer
  • Bulk Loading and Blending