SDS Double Suction

Technical Data: 

NFPA 20 standard deals with the selection and installation of pumps supplying liquid for private fire protection.

  • The scope of NFPA 20 document include liquid supplies; suction, discharge, and auxiliary equipment; power supplies, including power supply arrangements; electric drive and control; diesel engine drive and control; steam turbine drive and control; and acceptance tests and operation.
  • The purpose of this standard is to provide a reasonable degree of protection for life and property from fire through installation requirements for stationary pumps for fire protection based upon sound engineering principles, test data, and field experience.
  • Design Features: 
    • Applicable Capacity and Head range for SDS pumps are listed below;
    Rated Capacity (GPM) Rated Head (m)
    400 1500 4500 50 110
    450 2000 60 120
    500 2500 70 140
    750 3000 80
    1000 3500 90
    1250 4000 100
    • All interior bolt or screw that are exposed to pumped liquid shall be of rolled bronze or corrosion resistant material.
    • The pump shall be provided with automatic air-release valve, circulation relief valve and pressure gauges.
    • Bearings shall have an L-10 rating of not less than 5000 hours at maximum load.
    • The pumps shall be provided with at least four packing rings plus a lantern ring. The lantern ring may be permitted to replace one ring of packing.
    • Impellers, wear rings, shafts, lantern rings, glands shall be made of corrosion resistant material.
    • Following material specifications are applied to STANDART NFPA fire pumps:
    Part Definition DIN 17007 EN-DIN ASTM
    Casing Cast Iron 0.6025 GG 25 (GJL-250) A48 Gr. 40B
    Ductile Iron 0.7040 GGG 40 (GJS-400-15) A536 Gr. 60-40-18
    Impeller Cast Bronze 2.1050.01 G-CuSn 10 B584 C90700
    Shaft Stainless Steel 1.4021 X20 Cr13 A276 Type420
    Stainless Steel 1.4401 X5 Cr Ni Mo 17-12-2 A276 Type316
    Shaft Sleeve Stainless Steel 1.4401 X5 Cr Ni Mo 17-12-2 A276 Type316
    Technical Drawings: 
    Fire Fighting