FINISH THOMPSON DB SERIES MODELS MSDB3P-E-FF-1-24, DB6HP-FF-7-74 AND MSDB2P-FF-5-6P-84 FOR PUMPING CORROSIVE CHEMICALS

When it comes to chemical transfer, reliability matters.

Finish Thompson Inc are world leaders in plastic and ETFE-lined pumps, and their DB Series centrifugal chemical pumps continue to prove themselves in demanding applications.

Recently, we supplied several magnetically coupled DB Series pumps for Sodium Hydroxide (NaOH) and brine transfer, demonstrating why these seal-less pumps are often our first choice for corrosive and aggressive chemicals.

With polypropylene casings, the featured pumps include:

• Finish Thompson seal-less magnetically coupled multistage centrifugal pump model MSDB3P-E-FF-1-24 close coupled to a 4 kW, 2 pole, 400 volt, three phase, 25-50 hertz, IP56, IE3, motor. 1” x 1” FRP flanged connections (will connect to ANSI 150# pipework). Impeller diameter 5.35”. NPSHR = 2.3 metres.

• Liquid not stated – 35 ppt NaOH present – pH 11 liquid
• Design duty of 7.561 m³/hr vs 55.3 m head
• Operational duty of 6.301 m³/hr vs 50 m head
• SG 1.05, viscosity = 0.881 cP, 35°C
• 400/3/50 safe area IP56, assumed NPSHA > NPSHR + 0.5 metres

• Finish Thompson seal-less magnetically coupled centrifugal pump model DB6HP-FF-7-74 close coupled to a 0.37 kW, 2 pole, 400 volt, three phase, 25-50 hertz, IP56, IE3, motor. 1” x 1” FRP flanged connections (will connect to ANSI 150# pipework). Impeller diameter 3.75”. NPSHR = 2.3 metres.

• Liquid not stated – 93 ppt NaOH present – pH 5 liquid
• Design duty of 2.827 m³/hr vs 10.3 m head
• Operational duty of 2.356 m³/hr vs 8.07 m head
• SG 0.944, viscosity = 0.727 cP, 35°C
• 400/3/50 safe area, IP56, assumed NPSHA > NPSHR + 0.5 metres

• Finish Thompson seal-less magnetically coupled multistage centrifugal pump model MSDB2P-FF-5-6P-84 close coupled to a 1.1 kW, 2 pole, 400 volt, three phase, 25-50 hertz, IP56, IE3, motor. 1” x 1” FRP flanged connections (will connect to ANSI 150# pipework). Impeller diameter 4.25”. NPSHR = 2.7 metres.

• Brine with 93 ppt NaOH present – pH 5 liquid
• Design duty of 2.846 m³/hr vs 21 m head
• Operational duty of 2.356 m³/hr vs 18 m head
• SG 1.05, viscosity = 0.881 cP, 35°C
• 400/3/50 safe area, IP56, assumed NPSHA > NPSHR + 0.5 metres

• Finish Thompson seal-less magnetically coupled multistage centrifugal pump model MSDB2P-FF-5-6P-84 close coupled to a 1.1 kW, 2 pole, 400 volt, three phase, 25-50 hertz, IP56, IE3, motor. 1” x 1” FRP flanged connections (will connect to ANSI 150# pipework). Impeller diameter 4.25”. NPSHR = 2.7 metres.

• Brine with 93 ppt NaOH present – pH 5.5 liquid
• Design duty of 2.98 m³/hr vs 14 m head
• Operational duty of 2.483 m³/hr vs 11 m head
• SG 0.999, viscosity = 0.881 cP, 35°C
• 400/3/50 safe area, IP56, assumed NPSHA > NPSHR + 0.5 metres