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  5. Liquiflo - Model 620 - Sub-ANSI ...

Liquiflo - Model 620 -Sub-ANSI Centrifugal Pump

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Liquiflo's Centry Series 620 is a Sub-ANSI centrifugal pump crafted from either 316 stainless steel or Alloy-C, available with sealed or magnetically-coupled (MC) configurations. Designed to tackle lower flow applications that can pose challenges to standard ANSI pumps operating below their Best Efficiency Point (BEP), the 620 model offers reliable performance. It features American National Standards Institute (ANSI) 150-pound raised face (RF) flanges, which are pressure rated up to 275 PSI at temperatures not exceeding 100°F, requiring de-rating for higher temperatures. The pump's design accommodates both closed-bracket (new) and open-bracket (legacy) styles, with options for single or double mechanical seals. The temperature limits for the mag-drive version are predetermined, while those for the sealed pump depend on the motor or driver used. This model is ideal for users who demand enhanced equipment reliability in critical applications.
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Suction Port: 1" NPT/FLG 1
Discharge Port: 3/4" NPT/FLG 1
Impeller Diameter (Full Size): 3 3/4"
Impeller Trims (Standard): 3.5" 3.25" 3" 2.75"
Max Flow Rate: 45 GPM
Max Total Head: 65 FT
Max Discharge Pressure: 300 PSIG 2
Max Temperature: 500 °F 3
Min Temperature: -100 °F 3
Max Speed: 3500 RPM
NPSHR @ 3500 RPM & BEP: 7.5 FT
NPSHR @ 1750 RPM & BEP: 1.8 FT

Weight (without motor): NPT : FLG
Sealed (N): SMS Type 21/9T: 12 LBS : 16 LBS
Sealed (L): SMS Type 9A : 16 LBS : 20 LBS
Sealed (L): DMS/Packing : 26 LBS : 30 LBS
Mag-Drive: 30 LBS : 34 LBS

1 Standard Flanges are ANSI 150# RF.

2 Maximum Pressure Rating for 150# Flanges is 275
PSIG up to 100°F. Derating required above 100°F.

3 Temperature Limit given for Mag-drive pump with proper configuration; Temperature Limit for Sealed pump is dependent on Motor or Driver.

N = New Design (Closed-Bracket)
L = Legacy Design (Open-Bracket)

SMS = Single Mechanical Seal
DMS = Double Mechanical Seal