P257 Series




 P257 Series 
Displacement cc/rev: 21 - 105
Gear Widths: 1/2" - 2.1/2"
Max PSI / BAR: 4500 / 310
RPM: 600 - 2400

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The P257 series is a medium displacement, high pressure bushing gear pump from Permco.

Free Technical Downloads

PDF_LogoPermco 257 Data Sheet

PDF_LogoPermco-257-Codebook

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+ Product Overview

The Permco P257 is a medium frame sized, hydraulic bushing gear pump with high pressure capabilities.

The P257 series gear pump is built from cast iron ensuring a strong and long lasting product, which can stand the most robust applications. Single & multiple units are available as per your requirements.

The pressure loaded wear plates of the pump, provides you with a high efficient product.

wide range of configurable mounting, shaft and porting options are available to suit your unique requirements. (Please see bottom of the page for more info.)

Compatible with Mineral Oil, Water Glycol, Invert Emulsion & Fire Resistant fluids.

Spare parts available from stock, such as seal kits, flanges, shafts and individual pump sections enabling a fast turnaround for you if required.

+ Our Service to you

We machine, build from stock and test the P257 gear pump on site, to ensure the highest quality and a workable product is delivered to you. The P257 gear pump also comes with a 12 month warranty.

In the event your product breaks down in the first 12 months, please CONTACT US so we can your warranty rights with you.

In the event of an emergency or you have a machine breakdown; we can supply this product to you with a 24 / 48 turnaround.

+ Common Applications

Customers of ours have used this gear pump in applications such as:

  • Cranes
  • Refuse trucks

But can be applied to a wide range of mobile machinery within a variety of industries.

+ ATEX Information

The P257 can be supplied as an ATEX gear pump if required. ATEX Group I & II approval is required, if the product will be used in potentially explosive atmospheres.

ATEX gear pumps are ideally suited for applications in the mining, oil & gas industry.

 

+ Mounting, Drive Shaft, Porting Options

P257-Various-Options-Pop-Up

+ Product Coding Examples

257-Coding-Example

+ Pump Performace

P257-Pump-Performance

+ Recommended Operating Conditions

• Fluid viscosity, normal operating conditions 9 – 220 cst.
• Fluid temperature should not exceed 82 deg C for mineral oil 
or 57 deg. C for water glycol.
• Fluid cleanliness, 10 micron filter with Beta 200 rating is 
recommended.
• Inlet pressure; for best operation with mineral oil, pressure 
should not exceed minus 0.237 BAR (7 in HG) or with water 
glycol, minus 0.101 BAR (3 in HG)

+ Weights & Dimensions

257-Weights-&-Dimensions