Engine Selection Advice

 Engine Selection Advice

You must consider the following when selecting an engine:

Application:    e.g. water pump

Hp or kW required    e.g. 20 hp

Speed    e.g. 2500 rpm

Direct-coupled or v-belt    e.g. direct-coupled by a flexible coupling

Ambient conditions    e.g. up to 40c, 30% humidity

Site conditions    e.g. undercover on farm site

Duty – continuous or intermittent    e.g. continuous 2500 hrs per year

Other factors e.g. Side loads, vibration, electrics, maintenance and service plan, noise levels, shock loads, exhaust emissions etc.

Standard conditions:    20°c ambient temperature, 30% relative humidity at 100 meters altitude.

Gross intermittent rating:    1 hr rating based on the engine without cooling fan, air cleaner, muffler, but with

alternator idling.

Net intermittent rating:    1 hr rating based on the engine with standard cooling fan, air cleaner, muffler and

alternator, fitted to the engine

Net continuous rating:    Continuous output based on the engine with standard cooling fan, air cleaner,

Muffler and alternator fitted.

De-rating:    Refer to DPS. Allowance for changes to standard conditions being ambient temperature, relative humidity and altitude.

Transmission Factors:    Allowance for power losses in the transmission system e.g. Belt and pulley

losses, flexible coupling losses, gearbox transmission losses etc.

If you require help in selection or want your engine selection checked, please ask.

For information on engine installation, selection and general specifications and dimensions by model, engine performance curves including fuel usage details, engine operating systems, check lists etc, please contact us at hiersun power email: sales1@hiersungroup.com

	Typical Applications
Pumping and Irrigation		Hydraulic Power Pak Drives
Generators		Welders
Light Towers		Access Platforms
Refrigeration Units		Tractors
Excavators		Skid Steer Loaders
Wheel End Loaders		Mining Vehicles
Marine Propulsion		Marine Generator Sets